XML 156 R87.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Retirement and Postemployment Benefits (Plan Assets and Expected Cash Flows) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Pension Plan [Member] | U.S. [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | $ 3,887 | $ 4,068
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 4,068 | 3,585
Balance at end of period | 3,887 | 4,068
Defined Benefit Plan Estimated Future Employer Contributions (Numeric) [Abstract] |  |
Employer contributions | 47 | $ 115
Expected amount of benefit payments in the next period for non-qualified plans | 10 |
Estimated Future Benefit Payments (Details) [Abstract] |  |
2022 | 207 |
2023 | 207 |
2024 | 204 |
2025 | 204 |
2026 | 202 |
2027-2030 | $ 946 |
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 100.00% | 100.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 100.00% |
Assumptions Used in Calculations (Numeric) [Abstract] |  |
The limited lives of four partnership of private equity investments (in years) | 10 years |
The amount of potential liability that maybe required to be funded by the master trust during life of the partnership | $ 111 |
Number Of Days Notice Required To Redeem Shares | 45 days |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | $ 3,887 | $ 4,068
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 4,068 |
Balance at end of period | $ 3,887 | $ 4,068
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 100.00% | 100.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 100.00% |
Assumptions Used in Calculations (Numeric) [Abstract] |  |
The limited lives of four partnership of private equity investments (in years) | 10 years |
The amount of potential liability that maybe required to be funded by the master trust during life of the partnership | $ 111 |
Number Of Days Notice Required To Redeem Shares | 45 days |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | $ 3,887 | $ 4,068
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 4,068 |
Balance at end of period | 3,887 | 4,068
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 587 | 695
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 695 |
Balance at end of period | 587 | 695
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 587 | 695
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 695 |
Balance at end of period | 587 | 695
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 1,069 | 1,007
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 1,007 |
Balance at end of period | 1,069 | 1,007
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 1,069 | 1,007
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 1,007 |
Balance at end of period | 1,069 | 1,007
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 20 | 15
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 15 | 24
Purchases, sales and settlements | 5 | (9)
Balance at end of period | 20 | 15
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 20 | 15
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 15 | 24
Purchases, sales and settlements | 5 | (9)
Balance at end of period | 20 | 15
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 266 | 300
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 266 | 300
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 266 | 300
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 266 | 300
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Cash And Cash Equivalents [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 754 | 742
Measured at fair value not using net asset value per share | 41 | 60
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 754 | 742
Measured at fair value not using net asset value per share | 41 | 60
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 41 | 60
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 41 | 60
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Equity Securities [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | International Equity Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 511 | 566
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | International Equity Securities [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 511 | 566
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Commingled Debt Equity Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 677 | 712
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Commingled Debt Equity Securities [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 677 | 712
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 281 | 336
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 281 | 336
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 280 | 335
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 280 | 335
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 1 | 1
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 1 | 1
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 1,039 | 1,045
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 1,039 | 1,045
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 1,019 | 1,030
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 1,019 | 1,030
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 20 | 15
Fair value at end of period | 20 | 15
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 15 | 20
Purchases, sales and settlements | 5 | (5)
Balance at end of period | 20 | 15
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Corporate Debt Securities [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 20 | 15
Fair value at end of period | 20 | 15
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 15 | 20
Purchases, sales and settlements | 5 | (5)
Balance at end of period | 20 | 15
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 14 | 13
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 14 | 13
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 14 | 13
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 14 | 13
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Other Debt Securities [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Real Estate Alternative Investments [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 69 | 76
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Real Estate Alternative Investments [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 69 | 76
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Total Trust Assets Prior to Adjustments [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 4,017 | 4,110
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 4,110 |
Balance at end of period | 4,017 | 4,110
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Total Trust Assets Prior to Adjustments [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 4,017 | 4,110
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 4,110 |
Balance at end of period | 4,017 | 4,110
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Private Equity Alternative Investments [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 94 | 68
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Private Equity Alternative Investments [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 94 | 68
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Hedge Fund Of Funds Alternative Investments [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 236 | 223
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Hedge Fund Of Funds Alternative Investments [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 236 | 223
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 35 | (37)
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 35 | (37)
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | Level 1 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 35 | (37)
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | Level 2 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 35 | (37)
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Derivatives [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Insurance Contracts [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period |  | 0
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 0 | 4
Purchases, sales and settlements |  | (4)
Balance at end of period |  | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Insurance Contracts [Member] | Level 3 [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period |  | 0
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 0 | 4
Purchases, sales and settlements |  | (4)
Balance at end of period |  | 0
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Receivables And Payables Net [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 25 | 116
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 116 |
Balance at end of period | 25 | 116
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Receivables And Payables Net [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 25 | 116
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 116 |
Balance at end of period | 25 | 116
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Account 401 H [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | (155) | (158)
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | (158) |
Balance at end of period | (155) | (158)
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Account 401 H [Member] | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | (155) | (158)
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | (158) |
Balance at end of period | (155) | (158)
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Limited Partner |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | 0 | 6
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Limited Partner | LKE [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | $ 0 | $ 6
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 55.00% | 56.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 55.00% |
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 55.00% | 56.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 55.00% |
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | Equity Securities [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 32.00% | 34.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | Equity Securities [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 32.00% | 34.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | Debt Securities [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 13.00% | 13.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | Debt Securities [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 13.00% | 13.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | Alternative Investments [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 10.00% | 9.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Growth Portfolio [Member] | Alternative Investments [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 10.00% | 9.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Immunizing Portfolio [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 43.00% | 43.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 43.00% |
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Immunizing Portfolio [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 43.00% | 43.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 43.00% |
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Immunizing Portfolio [Member] | Debt Securities [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 35.00% | 33.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Immunizing Portfolio [Member] | Debt Securities [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 35.00% | 33.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Immunizing Portfolio [Member] | Derivatives [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 8.00% | 10.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Immunizing Portfolio [Member] | Derivatives [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 8.00% | 10.00%
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Liquidity Portfolio [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 2.00% | 1.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 2.00% |
Pension Plan [Member] | U.S. [Member] | Master Trust [Member] | Liquidity Portfolio [Member] | LKE [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 2.00% | 1.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 2.00% |
Other Postretirement Benefits Plan [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 100.00% | 100.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 100.00% |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | $ 367 | $ 367
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 367 | 340
Balance at end of period | 367 | 367
Defined Benefit Plan Estimated Future Employer Contributions (Numeric) [Abstract] |  |
Employer contributions | 18 | 18
Amount to be contributed to plan in the next fiscal year | 22 |
Estimated Future Benefit Payments (Details) [Abstract] |  |
2022 | 44 |
2023 | 42 |
2024 | 41 |
2025 | 40 |
2026 | 38 |
2027-2030 | 176 |
Expected Federal Subsidy (Details) [Abstract] |  |
Federal subsidy 2022 | 1 |
Federal subsidy 2023 | 0 |
Federal subsidy 2024 | 0 |
Federal subsidy 2025 | 0 |
Federal subsidy 2026 | 0 |
Federal subsidy 2027-2030 | 1 |
Other Postretirement Benefits Plan [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 6 | 5
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 5 |
Balance at end of period | 6 | 5
Other Postretirement Benefits Plan [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 38 | 39
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 39 |
Balance at end of period | 38 | 39
Other Postretirement Benefits Plan [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 0 | 0
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 0 |
Balance at end of period | $ 0 | $ 0
Other Postretirement Benefits Plan [Member] | Cash And Cash Equivalents [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 3.00% | 3.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 5.00% |
Other Postretirement Benefits Plan [Member] | Money Market Funds [Member] |  |
Assumptions Used in Calculations (Numeric) [Abstract] |  |
Number of months from date of purchase that investment must mature | 13 months |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | $ 6 | $ 5
Other Postretirement Benefits Plan [Member] | Money Market Funds [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 6 | 5
Other Postretirement Benefits Plan [Member] | Money Market Funds [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Other Postretirement Benefits Plan [Member] | Money Market Funds [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | $ 0 | $ 0
Other Postretirement Benefits Plan [Member] | Equity Securities [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 45.00% | 42.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 45.00% |
Other Postretirement Benefits Plan [Member] | United States Large Cap Equity Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | $ 96 | $ 89
Other Postretirement Benefits Plan [Member] | Commingled Debt Equity Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value using net asset value per share | $ 75 | $ 77
Other Postretirement Benefits Plan [Member] | Debt Securities [Member] |  |
Actual Allocation by Plan Asset (Details) [Abstract] |  |
Percentage of trust assets | 52.00% | 55.00%
Target Allocations (Details ) [Abstract] |  |
Target asset allocation | 50.00% |
Other Postretirement Benefits Plan [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | $ 0 | $ 2
Other Postretirement Benefits Plan [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Other Postretirement Benefits Plan [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 2
Other Postretirement Benefits Plan [Member] | US Treasury And US Government Sponsored Agency Debt Securities [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 38 | 37
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Level 1 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Level 2 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 38 | 37
Other Postretirement Benefits Plan [Member] | Corporate Debt Securities [Member] | Level 3 [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Measured at fair value not using net asset value per share | 0 | 0
Other Postretirement Benefits Plan [Member] | Total Trust Assets Prior to Adjustments [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 215 | 210
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 210 |
Balance at end of period | 215 | 210
Other Postretirement Benefits Plan [Member] | Receivables And Payables Net [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | (3) | (1)
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | (1) |
Balance at end of period | (3) | (1)
Other Postretirement Benefits Plan [Member] | Account 401 H [Member] |  |
Defined benefit plan fair value of plan assets (Details) [Abstract] |  |
Fair value at end of period | 155 | 158
Change in Fair Value of Level 3 Plan Assets [Roll Forward] |  |
Balance at beginning of period | 158 |
Balance at end of period | $ 155 | $ 158

X
- References No definition available. + Details
Name: | ppl_ActualAllocationByPlanAssetDetailsAbstract
Namespace Prefix: | ppl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of potential liability that maybe required to be funded by the master during life of the partnership. + References No definition available. + Details
Name: | ppl_AmountOfPotentialLiabilityThatMaybeRequiredToBeFundedByMasterDuringLifeOfPartnership
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of payments to be made in upcoming year under various non-qualified supplemental pension plans for which no assets are segregated from corporate assets. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanExpectedAmountOfBenefitPaymentsInNextPeriodForNonqualifiedPlans
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | ppl_DefinedBenefitPlanFairValueOfPlanAssetsAbstract
Namespace Prefix: | ppl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, measured at their fair value not using net asset value per share as of the measurement date. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanFairValueOfPlanAssetsMeasurementNotUsingNetAssetValue
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, measured at their fair value using net asset value per share as of the measurement date. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanFairValueOfPlanAssetsMeasurementUsingNetAssetValue
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The limited lives in years of four partnership of private equity investments. + References No definition available. + Details
Name: | ppl_LimitedLivesInYearsOfFourPartnershipPrivateEquity
Namespace Prefix: | ppl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The of days noticed required to redeem shares under investment contract terms. + References No definition available. + Details
Name: | ppl_NumberOfDaysNoticeRequiredToRedeemShares
Namespace Prefix: | ppl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of months from the date of purchase that maturity dates of investments in the OPEB plans must not exceed. + References No definition available. + Details
Name: | ppl_OtherPostRetirementPlansMaximumMaturityDateFromDateOfPurchase
Namespace Prefix: | ppl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedInCalculationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanEstimatedFutureEmployerContributionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, measured using unobservable input, of increase (decrease) in plan asset of defined benefit plan from purchase, sale and settlement of trade associated with underlying investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(B) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of prescription drug subsidy receipt expected after fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
Name: | us-gaap_PrescriptionDrugSubsidyReceiptsAfterYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of prescription drug subsidy receipt expected in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_PrescriptionDrugSubsidyReceiptsNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of prescription drug subsidy receipt expected in fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_PrescriptionDrugSubsidyReceiptsYearFive1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of prescription drug subsidy receipt expected in fourth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_PrescriptionDrugSubsidyReceiptsYearFour1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of prescription drug subsidy receipt expected in third fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
Name: | us-gaap_PrescriptionDrugSubsidyReceiptsYearThree1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of prescription drug subsidy receipt expected in second fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_DefinedBenefitPlansTrustsWithinPlanAxis=ppl_MasterTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_LouisvilleGasAndElectricAndKentuckyUtilitiesEnergyLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_EquitySecuritiesInternationalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_EquitySecuritiesCommingledDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DomesticCorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_TotalTrustAssetsPriortoAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_InsuranceContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_ReceivablesAndPayablesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_Account401HMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_LimitedPartnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_TypeOfPortfolioAxis=ppl_GrowthPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_AlternativeInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_TypeOfPortfolioAxis=ppl_ImmunizingPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_TypeOfPortfolioAxis=ppl_LiquidityPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=ppl_EquitySecuritiesUnitedStatesLargeCapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |