Segment and Related Information (Geographic Data) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) Integer	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers | $	$ 5,783	$ 5,474	$ 5,602
Number of reportable segments	2
PPL Electric Utilities Corp [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers | $	$ 2,402	2,331	2,358
Number of reportable segments	1
Number of operating segments	2
LOUISVILLE GAS And ELECTRIC CO [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers | $	$ 1,569	1,456	1,500
Number of reportable segments	1
Number of operating segments	1
Kentucky Utilities Co [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers | $	$ 1,826	$ 1,690	$ 1,740
Number of reportable segments	1
Number of operating segments	1