Goodwill and Other Intangible Assets (Other Intangibles - Finite-Lived) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subject to amortization: [Abstract]
Gross carrying amount	$ 551	$ 547
Accumulated amortization	231	219
Contracts [Member]
Subject to amortization: [Abstract]
Gross carrying amount	125	125
Accumulated amortization	90	82
Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	406	401
Accumulated amortization	135	133
Licenses And Other [Member]
Subject to amortization: [Abstract]
Gross carrying amount	20	21
Accumulated amortization	6	4
Intangible assets with no regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	9	7	$ 6
Forecasted amortization in 2021	5
Forecasted amortization in 2022	5
Forecasted amortization in 2023	5
Forecasted amortization in 2024	5
Forecasted amortization in 2025	5
Intangible assets with regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	8	8	9
Forecasted amortization in 2021	8
Forecasted amortization in 2022	8
Forecasted amortization in 2023	9
Forecasted amortization in 2024	9
Forecasted amortization in 2025	2
Other Intangibles Excluding Emission Allowances And Or Renewable Energy Credits [Member]
Subject to amortization: [Abstract]
Amortization expense	17	15	15
Forecasted amortization in 2021	13
Forecasted amortization in 2022	13
Forecasted amortization in 2023	14
Forecasted amortization in 2024	14
Forecasted amortization in 2025	7
PPL Electric Utilities Corp [Member]
Subject to amortization: [Abstract]
Gross carrying amount	384	381
Accumulated amortization	131	130
PPL Electric Utilities Corp [Member] \| Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	382	379
Accumulated amortization	130	129
PPL Electric Utilities Corp [Member] \| Licenses And Other [Member]
Subject to amortization: [Abstract]
Gross carrying amount	2	2
Accumulated amortization	1	1
PPL Electric Utilities Corp [Member] \| Intangible assets with no regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	4	4	4
Forecasted amortization in 2021	4
Forecasted amortization in 2022	4
Forecasted amortization in 2023	4
Forecasted amortization in 2024	4
Forecasted amortization in 2025	4
Louisville Gas And Electric Co [Member]
Subject to amortization: [Abstract]
Gross carrying amount	93	93
Accumulated amortization	63	58
Louisville Gas And Electric Co [Member] \| Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	7	7
Accumulated amortization	1	1
Louisville Gas And Electric Co [Member] \| OVEC power purchase agreement [Member]
Subject to amortization: [Abstract]
Gross carrying amount	86	86
Accumulated amortization	62	57
Louisville Gas And Electric Co [Member] \| Intangible assets with regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	5	6	6
Forecasted amortization in 2021	6
Forecasted amortization in 2022	6
Forecasted amortization in 2023	6
Forecasted amortization in 2024	6
Forecasted amortization in 2025	1
Kentucky Utilities Co [Member]
Subject to amortization: [Abstract]
Gross carrying amount	55	54
Accumulated amortization	32	28
Kentucky Utilities Co [Member] \| Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	16	15
Accumulated amortization	4	3
Kentucky Utilities Co [Member] \| OVEC power purchase agreement [Member]
Subject to amortization: [Abstract]
Gross carrying amount	39	39
Accumulated amortization	28	25
Kentucky Utilities Co [Member] \| Intangible assets with no regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	1	0	0
Kentucky Utilities Co [Member] \| Intangible assets with regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	3	$ 2	$ 3
Forecasted amortization in 2021	2
Forecasted amortization in 2022	2
Forecasted amortization in 2023	3
Forecasted amortization in 2024	3
Forecasted amortization in 2025	$ 1

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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