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Goodwill and Other Intangible Assets (Other Intangibles - Indefinite-Lived) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Not subject to amortization due to indefinite life: [Line Items]      
Gross carrying amount $ 23 $ 23  
Gross carrying amount - other intangible assets 574 570  
Intangible assets with no regulatory offset [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Amortization expense 9 7 $ 6
Land Rights and Easements [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Gross carrying amount 17 17  
Other [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Gross carrying amount 6 6  
PPL Electric Utilities Corp [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Gross carrying amount - other intangible assets 401 398  
PPL Electric Utilities Corp [Member] | Intangible assets with no regulatory offset [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Amortization expense 4 4 4
PPL Electric Utilities Corp [Member] | Land Rights and Easements [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Gross carrying amount 17 17  
Kentucky Utilities Co [Member] | Intangible assets with no regulatory offset [Member]      
Not subject to amortization due to indefinite life: [Line Items]      
Amortization expense $ 1 $ 0 $ 0