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Stock-Based Compensation (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) Integer $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares
All Plans [Member] | Restricted Shares And Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |
Nonvested, beginning of period (in shares) | 896,336 |  |
Granted (in shares) | 458,610 |  |
Vested (in shares) | (303,890) |  |
Forfeited (in shares) | (46,473) |  |
Nonvested, end of period (in shares) | 1,004,583 | 896,336 |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Weighted-average grant date fair value per share, nonvested, beginning of period (in dollars per share) | $ / shares | $ 32.56 |  |
Weighted-average grant date fair value per share, granted (in dollars per share) | $ / shares | 28.00 | $ 35.30 | $ 31.95
Weighted-average grant date fair value per share, vested (in dollars per share) | $ / shares | 30.57 |  |
Weighted-average grant date fair value per share, forfeited (in dollars per share) | $ / shares | 30.23 |  |
Weighted-average grant date fair value per share, nonvested - end of period (in dollars per share) | $ / shares | $ 31.19 | $ 32.56 |
Total fair value of units vested during the period | $ | $ 8,000,000 | $ 19,000,000 | $ 13,000,000
Fair value assumptions and methodology [Abstract] |  |  |
Award vesting period (in years) | 3 years |  |
All Plans [Member] | Total Shareowner Return Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |
Nonvested, beginning of period (in shares) | 626,254 |  |
Granted (in shares) | 306,009 |  |
Vested (in shares) | (53,340) | 0 | 0
Forfeited (in shares) | (245,150) |  |
Nonvested, end of period (in shares) | 633,773 | 626,254 |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Weighted-average grant date fair value per share, nonvested, beginning of period (in dollars per share) | $ / shares | $ 36.98 |  |
Weighted-average grant date fair value per share, granted (in dollars per share) | $ / shares | 32.44 | $ 37.63 | $ 35.83
Weighted-average grant date fair value per share, vested (in dollars per share) | $ / shares | 34.47 |  |
Weighted-average grant date fair value per share, forfeited (in dollars per share) | $ / shares | 37.75 |  |
Weighted-average grant date fair value per share, nonvested - end of period (in dollars per share) | $ / shares | $ 34.68 | $ 36.98 |
Total fair value of units vested during the period | $ | $ 2,000,000 |  |
Period over which performance units fair value is recognized (in years) | 3 years |  |
Maximum payout percentage of target award | 200.00% |  |
Fair value assumptions and methodology [Abstract] |  |  |
Expected option life (in years) | 3 years | 3 years | 3 years
Expected stock volatility | 27.81% | 15.64% | 17.57%
All Plans [Member] | Total Shareowner Return Performance Units [Member] | Retirement Eligible [Member] |  |  |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Period over which performance units fair value is recognized (in years) | 1 year |  |
All Plans [Member] | Total Shareowner Return Performance Units [Member] | Not Retirement Eligible [Member] |  |  |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Period over which performance units fair value is recognized (in years) | 3 years |  |
Minimum period after which employee stock options become exercisable (in years) | 1 year |  |
All Plans [Member] | Return On Equity Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |
Nonvested, beginning of period (in shares) | 728,664 |  |
Granted (in shares) | 572,571 |  |
Vested (in shares) | (570,722) |  |
Forfeited (in shares) | (8,160) |  |
Nonvested, end of period (in shares) | 722,353 | 728,664 |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Weighted-average grant date fair value per share, nonvested, beginning of period (in dollars per share) | $ / shares | $ 32.81 |  |
Weighted-average grant date fair value per share, granted (in dollars per share) | $ / shares | 30.08 | $ 34.95 | $ 30.89
Weighted-average grant date fair value per share, vested (in dollars per share) | $ / shares | 32.02 |  |
Weighted-average grant date fair value per share, forfeited (in dollars per share) | $ / shares | 30.44 |  |
Weighted-average grant date fair value per share, nonvested - end of period (in dollars per share) | $ / shares | $ 31.28 | $ 32.81 |
Total fair value of units vested during the period | $ | $ 16,000,000 | $ 8,000,000 |
Period over which performance units fair value is recognized (in years) | 3 years |  |
Maximum payout percentage of target award | 200.00% |  |
All Plans [Member] | Stock Options [Member] |  |  |
Stock option activity [Roll Forward] |  |  |
Outstanding at beginning of period (in shares) | 1,103,016 |  |
Exercised (in shares) | (337,014) |  |
Weighted average remaining contractual term (in years) | 1 year |  |
Outstanding at end of period (in shares) | 766,002 | 1,103,016 |
Stock options - additional disclosures [Abstract] |  |  |
Period after which, employee stock options expire (in years) | 10 years |  |
Weighted-average exercise price per share at beginning of period (in dollars per share) | $ / shares | $ 26.22 |  |
Weighted average exercise price per share, exercised (in dollars per share) | $ / shares | 25.42 |  |
Weighted average exercise price per share at end of period (in dollars per share) | $ / shares | $ 26.57 | $ 26.22 |
Aggregate total intrinsic value | $ | $ 3,000,000 |  |
Cash received from exercise of stock options | $ | 10,000,000 | $ 8,000,000 | $ 53,000,000
Total intrinsic value of stock options exercised | $ |  |  | 11,000,000
All Plans [Member] | All Awards [Member] |  |  |
Aggregate disclosures [Abstract] |  |  |
Compensation expense | $ | 34,000,000 | 28,000,000 | 35,000,000
Income tax benefit | $ | 10,000,000 | $ 8,000,000 | $ 10,000,000
Unrecognized compensation expense | $ | $ 19,000,000 |  |
Weighted-average period for recognition | Integer | 1.7 |  |
Stock Incentive Plan [Member] |  |  |
Stock-Based Compensation [Line Items] |  |  |
Maximum number of shares approved for awards under the plan (in shares) | 15,000,000 |  |
Annual grant limit options (in shares) | 2,000,000 |  |
Annual grant limit for individual participants - performance based awards (in shares) | 750,000 |  |
Annual grant limit for individual participants - performance based awards | $ | $ 15,000,000 |  |
Incentive Compensation Plan For Key Employees [Member] |  |  |
Stock-Based Compensation [Line Items] |  |  |
Maximum number of shares approved for awards under the plan (in shares) | 14,199,796 |  |
Annual grant limit total as % of PPL outstanding PPL common stock on first day of each calendar year | 2.00% |  |
Annual grant limit options (in shares) | 3,000,000 |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | Restricted Shares And Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |
Nonvested, beginning of period (in shares) | 210,720 |  |
Transfer between registrants | (92,596) |  |
Granted (in shares) | 51,587 |  |
Vested (in shares) | (32,266) |  |
Forfeited (in shares) | (6,158) |  |
Nonvested, end of period (in shares) | 131,287 | 210,720 |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Weighted-average grant date fair value per share, nonvested, beginning of period (in dollars per share) | $ / shares | $ 32.73 |  |
Weighted-average grant date fair value per share, transfer between registrants (in dollars per share) | $ / shares | 32.99 |  |
Weighted-average grant date fair value per share, granted (in dollars per share) | $ / shares | 27.96 | $ 35.37 | $ 32.33
Weighted-average grant date fair value per share, vested (in dollars per share) | $ / shares | 29.98 |  |
Weighted-average grant date fair value per share, forfeited (in dollars per share) | $ / shares | 32.16 |  |
Weighted-average grant date fair value per share, nonvested - end of period (in dollars per share) | $ / shares | $ 31.50 | $ 32.73 |
Total fair value of units vested during the period | $ | $ 1,000,000 | $ 3,000,000 | $ 2,000,000
Fair value assumptions and methodology [Abstract] |  |  |
Award vesting period (in years) | 3 years |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | Total Shareowner Return Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |
Nonvested, beginning of period (in shares) | 61,807 |  |
Transfer between registrants | (53,663) |  |
Granted (in shares) | 10,010 |  |
Forfeited (in shares) | (2,800) |  |
Nonvested, end of period (in shares) | 15,354 | 61,807 |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Weighted-average grant date fair value per share, nonvested, beginning of period (in dollars per share) | $ / shares | $ 37.44 |  |
Weighted-average grant date fair value per share, transfer between registrants (in dollars per share) | $ / shares | 37.42 |  |
Weighted-average grant date fair value per share, granted (in dollars per share) | $ / shares | 32.92 | $ 38.64 | $ 35.68
Weighted-average grant date fair value per share, forfeited (in dollars per share) | $ / shares | 38.47 |  |
Weighted-average grant date fair value per share, nonvested - end of period (in dollars per share) | $ / shares | $ 34.36 | $ 37.44 |
Period over which performance units fair value is recognized (in years) | 3 years |  |
Maximum payout percentage of target award | 200.00% |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | Total Shareowner Return Performance Units [Member] | Retirement Eligible [Member] |  |  |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Period over which performance units fair value is recognized (in years) | 1 year |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | Total Shareowner Return Performance Units [Member] | Not Retirement Eligible [Member] |  |  |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Period over which performance units fair value is recognized (in years) | 3 years |  |
Minimum period after which employee stock options become exercisable (in years) | 1 year |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | Return On Equity Performance Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] |  |  |
Nonvested, beginning of period (in shares) | 61,807 |  |
Transfer between registrants | (53,663) |  |
Granted (in shares) | 12,895 |  |
Vested (in shares) | (5,685) |  |
Nonvested, end of period (in shares) | 15,354 | 61,807 |
Awards, Equity Instruments Other than Options, additional disclosures (Details) [Abstract] |  |  |
Weighted-average grant date fair value per share, nonvested, beginning of period (in dollars per share) | $ / shares | $ 33.01 |  |
Weighted-average grant date fair value per share, transfer between registrants (in dollars per share) | $ / shares | 33.00 |  |
Weighted-average grant date fair value per share, granted (in dollars per share) | $ / shares | 29.39 | $ 35.59 | $ 30.76
Weighted-average grant date fair value per share, vested (in dollars per share) | $ / shares | 32.27 |  |
Weighted-average grant date fair value per share, nonvested - end of period (in dollars per share) | $ / shares | $ 30.27 | $ 33.01 |
Total fair value of units vested during the period | $ | $ 0 | $ 1,000,000 |
Period over which performance units fair value is recognized (in years) | 3 years |  |
Maximum payout percentage of target award | 200.00% |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | Performance Units [Member] |  |  |
Fair value assumptions and methodology [Abstract] |  |  |
Expected option life (in years) | 3 years | 3 years | 3 years
Expected stock volatility | 27.81% | 15.64% | 17.57%
PPL Electric Utilities Corp [Member] | All Plans [Member] | Stock Options [Member] |  |  |
Stock options - additional disclosures [Abstract] |  |  |
Period after which, employee stock options expire (in years) | 10 years |  |
PPL Electric Utilities Corp [Member] | All Plans [Member] | All Awards [Member] |  |  |
Aggregate disclosures [Abstract] |  |  |
Compensation expense | $ | $ 11,000,000 | $ 10,000,000 | $ 12,000,000
Income tax benefit | $ | 3,000,000 | $ 3,000,000 | $ 3,000,000
Unrecognized compensation expense | $ | $ 2,000,000 |  |
Weighted-average period for recognition | Integer | 1.8 |  |
PPL Electric Utilities Corp [Member] | Stock Incentive Plan [Member] |  |  |
Stock-Based Compensation [Line Items] |  |  |
Maximum number of shares approved for awards under the plan (in shares) | 15,000,000 |  |
Annual grant limit options (in shares) | 2,000,000 |  |
Annual grant limit for individual participants - performance based awards (in shares) | 750,000 |  |
Annual grant limit for individual participants - performance based awards | $ | $ 15,000,000 |  |
PPL Electric Utilities Corp [Member] | Incentive Compensation Plan For Key Employees [Member] |  |  |
Stock-Based Compensation [Line Items] |  |  |
Maximum number of shares approved for awards under the plan (in shares) | 14,199,796 |  |
Annual grant limit total as % of PPL outstanding PPL common stock on first day of each calendar year | 2.00% |  |
Annual grant limit options (in shares) | 3,000,000 |  |

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- Definition The value of performance based awards that can be awarded under the plan to any single eligible employee in any calendar year. + References No definition available. + Details
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- Definition The maximum number of shares that can be awarded under the plan to any single eligible employee in any calendar year. + References No definition available. + Details
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- Definition The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior. + References No definition available. + Details
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- Definition This element represents the maximum number of options that can be awarded under the plan to any single eligible employee in any calendar year. + References No definition available. + Details
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- Definition The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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