XML 121 R82.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Retirement and Postemployment Benefits (Weighted-Average Assumptions, Cost Trend Rates and Funded Status) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent asset | $ 535 | $ 284 |
Pension Plan [Member] | U.S. [Member] |  |  |
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract] |  |  |
Benefit obligations valuation discount rate | 4.35% | 3.70% |
Benefit obligations valuation rate of compensation increase | 3.79% | 3.78% |
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract] |  |  |
Net periodic benefit costs discount rate - service cost | 3.70% | 4.21% | 4.59%
Net periodic benefit costs discount rate - interest cost | 3.70% | 4.21% | 4.59%
Net periodic benefit costs rate of compensation increase | 3.78% | 3.95% | 3.93%
Net periodic benefit costs expected return on plan assets | 7.25% | 7.00% | 7.00%
Assumed Health Care Cost Trend Rates (Details) [Abstract] |  |  |
Health care cost trend rate assumed for next year, obligations | 6.60% | 6.60% | 7.00%
Health care cost trend rate assumed for next year, cost | 6.60% | 7.00% | 6.80%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations | 5.00% | 5.00% | 5.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), cost | 5.00% | 5.00% | 5.00%
Year that the rate reaches the ultimate trend rate, obligations | 2023 | 2022 | 2022
Year that the rate reaches the ultimate trend rate, cost | 2022 | 2022 | 2020
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit Obligation, beginning of period | $ 4,288 | $ 4,079 |
Service cost | 62 | 65 | $ 66
Interest cost | 156 | 168 | 174
Participant contributions | 0 | 0 |
Plan Amendments | 1 | (1) |
Actuarial (gain) loss | (352) | 233 |
Settlements | 0 | (6) |
Termination benefits | 0 | 1 |
Gross benefits paid | (272) | (251) |
Federal subsidy | 0 | 0 |
Currency conversion | 0 | 0 |
Benefit Obligation, end of period | 3,883 | 4,288 | 4,079
Change in Plan Assets [Roll Forward] |  |  |
Balance at beginning of period | 3,488 | 3,243 |
Actual return on plan assets | (260) | 437 |
Employer contributions | 153 | 65 |
Participant contributions | 0 | 0 |
Transfer out | 0 | 0 |
Settlements | 0 | (6) |
Gross benefits paid | (272) | (251) |
Currency conversion | 0 | 0 |
Balance at end of period | 3,109 | 3,488 | $ 3,243
Funded Status, end of period | (774) | (800) |
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent asset | 0 | 0 |
Current liability | (13) | (13) |
Noncurrent liability | (761) | (787) |
Net amount recognized, end of period | (774) | (800) |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract] |  |  |
Prior service cost (credit) | 40 | 49 |
Net actuarial (gain) loss | 1,207 | 1,134 |
Total | 1,247 | 1,183 |
Total accumulated benefit obligation for defined benefit pension plans | 3,668 | 4,000 |
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract] |  |  |
AOCI | 370 | 374 |
Regulatory assets/liabilities | 877 | 809 |
Total | 1,247 | 1,183 |
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Fair Value of Plan Assets (Details) [Abstract] |  |  |
Projected benefit obligations | 3,883 | 4,288 |
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets | 3,109 | 3,488 |
Accumulated benefit obligation | 3,668 | 4,000 |
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets | $ 3,109 | $ 3,488 |
Pension Plan [Member] | U.K. [Member] |  |  |
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract] |  |  |
Benefit obligations valuation discount rate | 2.98% | 2.65% |
Benefit obligations valuation rate of compensation increase | 3.50% | 3.50% |
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract] |  |  |
Net periodic benefit costs discount rate - service cost | 2.73% | 2.99% | 3.90%
Net periodic benefit costs discount rate - interest cost | 2.31% | 2.41% | 3.14%
Net periodic benefit costs rate of compensation increase | 3.50% | 3.50% | 4.00%
Net periodic benefit costs expected return on plan assets | 7.23% | 7.22% | 7.20%
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit Obligation, beginning of period | $ 8,219 | $ 7,383 |
Service cost | 82 | 76 | $ 69
Interest cost | 185 | 178 | 235
Participant contributions | 13 | 13 |
Plan Amendments | 12 | 0 |
Actuarial (gain) loss | (406) | 293 |
Settlements | 0 | (1) |
Termination benefits | 0 | 0 |
Gross benefits paid | (381) | (345) |
Federal subsidy | 0 | 0 |
Currency conversion | (449) | 622 |
Benefit Obligation, end of period | 7,275 | 8,219 | 7,383
Change in Plan Assets [Roll Forward] |  |  |
Balance at beginning of period | 8,490 | 7,211 |
Actual return on plan assets | (30) | 480 |
Employer contributions | 188 | 486 |
Participant contributions | 13 | 13 |
Transfer out | 0 | 0 |
Settlements | 0 | (1) |
Gross benefits paid | (381) | (345) |
Currency conversion | (479) | 646 |
Balance at end of period | 7,801 | 8,490 | $ 7,211
Funded Status, end of period | 526 | 271 |
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent asset | 535 | 284 |
Current liability | (1) | 0 |
Noncurrent liability | (8) | (13) |
Net amount recognized, end of period | 526 | 271 |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract] |  |  |
Prior service cost (credit) | 12 | 0 |
Net actuarial (gain) loss | 2,806 | 2,755 |
Total | 2,818 | 2,755 |
Total accumulated benefit obligation for defined benefit pension plans | 6,689 | 7,542 |
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract] |  |  |
Total | 2,818 | 2,755 |
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Fair Value of Plan Assets (Details) [Abstract] |  |  |
Projected benefit obligations | 9 | 3,083 |
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets | 0 | 3,070 |
Accumulated benefit obligation | 9 | 10 |
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets | $ 0 | $ 0 |
Other Postretirement Benefits Plan [Member] |  |  |
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract] |  |  |
Benefit obligations valuation discount rate | 4.31% | 3.64% |
Benefit obligations valuation rate of compensation increase | 3.76% | 3.75% |
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract] |  |  |
Net periodic benefit costs discount rate - service cost | 3.64% | 4.11% | 4.48%
Net periodic benefit costs discount rate - interest cost | 3.64% | 4.11% | 4.48%
Net periodic benefit costs rate of compensation increase | 3.75% | 3.92% | 3.91%
Net periodic benefit costs expected return on plan assets | 6.40% | 6.21% | 6.11%
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit Obligation, beginning of period | $ 589 | $ 591 |
Service cost | 7 | 7 | $ 7
Interest cost | 21 | 23 | 26
Participant contributions | 13 | 14 |
Plan Amendments | 0 | 8 |
Actuarial (gain) loss | (34) | 4 |
Settlements | 0 | 0 |
Termination benefits | 0 | 0 |
Gross benefits paid | (58) | (59) |
Federal subsidy | 0 | 1 |
Currency conversion | 0 | 0 |
Benefit Obligation, end of period | 538 | 589 | 591
Change in Plan Assets [Roll Forward] |  |  |
Balance at beginning of period | 405 | 378 |
Actual return on plan assets | (20) | 54 |
Employer contributions | 23 | 15 |
Participant contributions | 11 | 13 |
Transfer out | (65) | 0 |
Settlements | 0 | 0 |
Gross benefits paid | (53) | (55) |
Currency conversion | 0 | 0 |
Balance at end of period | 301 | 405 | $ 378
Funded Status, end of period | (237) | (184) |
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent asset | 2 | 2 |
Current liability | (3) | (3) |
Noncurrent liability | (236) | (183) |
Net amount recognized, end of period | (237) | (184) |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract] |  |  |
Prior service cost (credit) | 10 | 9 |
Net actuarial (gain) loss | 24 | 16 |
Total | 34 | 25 |
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract] |  |  |
AOCI | 21 | 15 |
Regulatory assets/liabilities | 13 | 10 |
Total | 34 | 25 |
PPL Electric Utilities Corp [Member] | Pension Plan [Member] | U.S. [Member] | PPL Services Funded Status Allocation [Member] |  |  |
Change in Plan Assets [Roll Forward] |  |  |
Funded Status, end of period | 285 | 246 |
PPL Electric Utilities Corp [Member] | Other Postretirement Benefits Plan [Member] | PPL Services Funded Status Allocation [Member] |  |  |
Change in Plan Assets [Roll Forward] |  |  |
Funded Status, end of period | $ 120 | $ 62 |
LG And E And KU Energy LLC [Member] | Pension Plan [Member] | U.S. [Member] |  |  |
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract] |  |  |
Benefit obligations valuation discount rate | 4.35% | 3.69% |
Benefit obligations valuation rate of compensation increase | 3.50% | 3.50% |
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract] |  |  |
Net periodic benefit costs discount rate | 3.69% | 4.19% | 4.56%
Net periodic benefit costs rate of compensation increase | 3.50% | 3.50% | 3.50%
Net periodic benefit costs expected return on plan assets | 7.25% | 7.00% | 7.00%
Assumed Health Care Cost Trend Rates (Details) [Abstract] |  |  |
Health care cost trend rate assumed for next year, obligations | 6.60% | 6.60% | 7.00%
Health care cost trend rate assumed for next year, cost | 6.60% | 7.00% | 6.80%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations | 5.00% | 5.00% | 5.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), cost | 5.00% | 5.00% | 5.00%
Year that the rate reaches the ultimate trend rate, obligations | 2023 | 2022 | 2022
Year that the rate reaches the ultimate trend rate, cost | 2022 | 2022 | 2020
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit Obligation, beginning of period | $ 1,771 | $ 1,669 |
Service cost | 25 | 24 | $ 23
Interest cost | 63 | 68 | 71
Participant contributions | 0 | 0 |
Plan Amendments | 0 | 6 |
Actuarial (gain) loss | (168) | 113 |
Gross benefits paid | (111) | (109) |
Benefit Obligation, end of period | 1,580 | 1,771 | 1,669
Defined Benefit Plan One Time Cash Payouts To Terminated Vested Employees | 52 | 50 |
Change in Plan Assets [Roll Forward] |  |  |
Balance at beginning of period | 1,402 | 1,315 |
Actual return on plan assets | (106) | 175 |
Employer contributions | 109 | 21 |
Participant contributions | 0 | 0 |
Gross benefits paid | (111) | (109) |
Balance at end of period | 1,294 | 1,402 | $ 1,315
Funded Status, end of period | (286) | (369) |
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent asset | 0 | 0 |
Current liability | (4) | (4) |
Noncurrent liability | (282) | (365) |
Net amount recognized, end of period | (286) | (369) |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract] |  |  |
Prior service cost (credit) | 35 | 44 |
Net actuarial (gain) loss | 439 | 434 |
Total | 474 | 478 |
Total accumulated benefit obligation for defined benefit pension plans | 1,467 | 1,616 |
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract] |  |  |
AOCI | 118 | 144 |
Regulatory assets/liabilities | 356 | 334 |
Total | 474 | 478 |
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Fair Value of Plan Assets (Details) [Abstract] |  |  |
Projected benefit obligations | 1,580 | 1,771 |
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets | 1,294 | 1,402 |
Accumulated benefit obligation | 1,467 | 1,616 |
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets | $ 1,294 | $ 1,402 |
LG And E And KU Energy LLC [Member] | Other Postretirement Benefits Plan [Member] |  |  |
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract] |  |  |
Benefit obligations valuation discount rate | 4.32% | 3.65% |
Benefit obligations valuation rate of compensation increase | 3.50% | 3.50% |
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract] |  |  |
Net periodic benefit costs discount rate | 3.65% | 4.12% | 4.49%
Net periodic benefit costs rate of compensation increase | 3.50% | 3.50% | 3.50%
Net periodic benefit costs expected return on plan assets | 7.15% | 6.82% | 6.82%
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit Obligation, beginning of period | $ 223 | $ 220 |
Service cost | 4 | 4 | $ 5
Interest cost | 8 | 9 | 9
Participant contributions | 8 | 8 |
Plan Amendments | 0 | 8 |
Actuarial (gain) loss | (16) | (7) |
Gross benefits paid | (22) | (19) |
Benefit Obligation, end of period | 205 | 223 | 220
Change in Plan Assets [Roll Forward] |  |  |
Balance at beginning of period | 116 | 98 |
Actual return on plan assets | (9) | 14 |
Employer contributions | 24 | 15 |
Participant contributions | 8 | 8 |
Gross benefits paid | (22) | (19) |
Balance at end of period | 117 | 116 | $ 98
Funded Status, end of period | (88) | (107) |
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent asset | 2 | 2 |
Current liability | (3) | (3) |
Noncurrent liability | (87) | (106) |
Net amount recognized, end of period | (88) | (107) |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract] |  |  |
Prior service cost (credit) | 12 | 13 |
Net actuarial (gain) loss | (25) | (26) |
Total | (13) | (13) |
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract] |  |  |
AOCI | 10 | 6 |
Regulatory assets/liabilities | (23) | (19) |
Total | $ (13) | $ (13) |
Louisville Gas And Electric Co [Member] | Pension Plan [Member] | U.S. [Member] |  |  |
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract] |  |  |
Benefit obligations valuation discount rate | 4.33% | 3.65% |
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract] |  |  |
Net periodic benefit costs discount rate | 3.65% | 4.13% | 4.49%
Net periodic benefit costs expected return on plan assets | 7.25% | 7.00% | 7.00%
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit Obligation, beginning of period | $ 326 | $ 329 |
Service cost | 1 | 1 | $ 1
Interest cost | 12 | 13 | 15
Plan Amendments | 0 | 6 |
Actuarial (gain) loss | (24) | 11 |
Gross benefits paid | (30) | (34) |
Benefit Obligation, end of period | 285 | 326 | 329
Defined Benefit Plan One Time Cash Payouts To Terminated Vested Employees | 16 | 19 |
Change in Plan Assets [Roll Forward] |  |  |
Balance at beginning of period | 325 | 318 |
Actual return on plan assets | (24) | 41 |
Employer contributions | 10 | 0 |
Gross benefits paid | (30) | (34) |
Balance at end of period | 281 | 325 | $ 318
Funded Status, end of period | (4) | (1) |
Amounts recognized in the Balance Sheets consist of: [Abstract] |  |  |
Noncurrent liability | (4) | (1) |
Net amount recognized, end of period | (4) | (1) |
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract] |  |  |
Prior service cost (credit) | 22 | 27 |
Net actuarial (gain) loss | (107) | 92 |
Total | 129 | 119 |
Total accumulated benefit obligation for defined benefit pension plans | 285 | 326 |
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract] |  |  |
Total | 129 | 119 |
Louisville Gas And Electric Co [Member] | Pension Plan [Member] | U.S. [Member] | LKE Funded Status Allocation [Member] |  |  |
Change in Plan Assets [Roll Forward] |  |  |
Funded Status, end of period | 7 | 44 |
Louisville Gas And Electric Co [Member] | Other Postretirement Benefits Plan [Member] | LKE Funded Status Allocation [Member] |  |  |
Change in Plan Assets [Roll Forward] |  |  |
Funded Status, end of period | 65 | 74 |
Kentucky Utilities Co [Member] | Pension Plan [Member] | U.S. [Member] | LKE Funded Status Allocation [Member] |  |  |
Change in Plan Assets [Roll Forward] |  |  |
Funded Status, end of period | 1 | 36 |
Kentucky Utilities Co [Member] | Other Postretirement Benefits Plan [Member] | LKE Funded Status Allocation [Member] |  |  |
Change in Plan Assets [Roll Forward] |  |  |
Funded Status, end of period | $ 25 | $ 32 |

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

X
- Definition The pretax total of net (gain) loss, prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income and regulatory assets or liabilities associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsLiabilitiesBeforeTax
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income and regulatory assets or liabilities as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsLiabilitiesNetGainsLossesBeforeTax
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost. This represents amounts in other comprehensive income and regulatory assets or liabilities. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndRegulatoryAssetsLiabilitiesNetPriorServiceCostCreditBeforeTax
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The interest rate used to adjust for the time value of money related to interest cost. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateInterestCost
Namespace Prefix: | ppl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate used to adjust for the time value of money related to service cost. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateServiceCost
Namespace Prefix: | ppl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition For the change in plan assets, the amount of increase related to actual expenses paid offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. This element represents the amount of actual expenses paid causing a decrease (increase) in the fair value of plan assets. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanGrossBenefitsPaidOnPlanAssets
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The assumed health care cost trend rate for the next year used to measure the benefit obligation. This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanHealthCareRateAssumedForNextFiscalYearBenefitObligation
Namespace Prefix: | ppl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of lump-sum cash payments made to terminated, vested employees under a limited-time program. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanOneTimeCashPayoutsToTerminatedVestedEmployees
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of plan asset for defined benefit plan with projected benefit obligation in excess of plan assets. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanPlanWithProjectedBenefitObligationInExcessofPlanAssetsAggregateFairValueOfPlanAssets
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The pretax total of net (gain) loss, prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in regulatory assets or liabilities associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanRegulatoryAssetsLiabilities
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The ultimate trend rate for health care costs related to the benefit obligation. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanUltimateHealthCareCostTrendRateBenefitObligation
Namespace Prefix: | ppl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The year when the ultimate health care cost trend rate is expected to be reached related to the benefit obligation. + References No definition available. + Details
Name: | ppl_DefinedBenefitPlanYearThatRateReachesUltimateTrendRateBenefitObligation
Namespace Prefix: | ppl_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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 (b)(1) -URI http://asc.fasb.org/extlink&oid=108410482&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=112275985&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanActuarialGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
Name: | us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(10)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in plan assets of defined benefit plan from assets transferred into (from) plan. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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_DefinedBenefitPlanBenefitObligationBenefitsPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of contributions received by defined benefit plan from participant which increase benefit obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before benefit payment, of receipt from prescription drug subsidy which increases benefit obligation of defined benefit postretirement plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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_DefinedBenefitPlanBenefitObligationPrescriptionDrugSubsidyReceipt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DefinedBenefitPlanChangeInBenefitObligationRollForward
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=112275985&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=108410482&loc=d3e1928-114920 Reference 3: 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=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 5: 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=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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=108410482&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=108410482&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=108410482&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=112275985&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 (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 6: 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=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 + Details
Name: | us-gaap_DefinedBenefitPlanFundedStatusOfPlan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost recognized for passage of time related to defined benefit plan. + 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 (h)(2) -URI http://asc.fasb.org/extlink&oid=108410482&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=112275985&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanInterestCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAmendments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of contributions received by defined benefit plan from participant which increases plan assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=108410482&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=112275985&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanServiceCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanSettlementsBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. + 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 (b)(8) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanSettlementsPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase in benefit obligation for benefits provided to employees payable from defined benefit plan or payable upon retirement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanSpecialTerminationBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Definition Year ultimate health care cost trend rate is expected to be reached, in CCYY format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate
Namespace Prefix: | us-gaap_
Data Type: | us-types:gYearListItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
Name: | us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(24)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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: | us-gaap_RetirementPlanSponsorLocationAxis=country_GB
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: | dei_LegalEntityAxis=ppl_PplElectricUtilitiesCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_PlanSponsorAxis=ppl_ServicesCompanyFundedStatusAllocationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_LGAndEAndKUEnergyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_LouisvilleGasAndElectricCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_PlanSponsorAxis=ppl_LouisvilleGasAndElectricAndKentuckyUtilitiesEnergyLlcFundedStatusAllocationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_KentuckyUtilitiesCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |