Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 31, 2021	Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Asset Impairment Charges	$ 37
Asset Impairment Impairment Charges (After-Tax)	$ 28
Solar Panel Inventory		$ 32
Other		58	$ 86
Cumulative Effect, Period of Adoption, Adjustment
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount			2
Debt Instrument, Redemption, Period One [Member] | Senior Notes Due 2021 [Member] | Senior Notes [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Stated interest rate					4.375%
Principal amount					$ 250
Debt Instrument, Redemption, Period One [Member] | LKE [Member] | Senior Notes Due 2021 [Member] | Senior Notes [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Stated interest rate					4.375%
Principal amount					$ 250
Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		69	73	$ 56		$ 54
Additions charged to income		26	28	34
Additions charged to other accounts		0	0	3
Deductions		30	13	35
SEC Schedule, 12-09, Valuation Allowances and Reserves, Adjusted for CECL, Amount				58
Other		32	30
PPL Electric Utilities Corp [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Other		22	17
PPL Electric Utilities Corp [Member] | Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount		35	41	28		$ 27
Additions charged to income		13	19	26
Additions charged to other accounts		0	0	0
Deductions		19	8	25
SEC Schedule, 12-09, Valuation Allowances and Reserves, Adjusted for CECL, Amount				$ 30
Other		$ 3	$ 3