CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Net income (loss)		$ (1,840)	$ 554
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax		303	(61)
Qualifying derivatives, net of tax		(30)	8
Reclassifications from AOCI - (gains) losses, net of tax expense (benefit):
Qualifying derivatives, net of tax		25	(3)
Other Comprehensive (Income) Loss, Defined Benefit Plans, after Reclassification Adjustment, after Tax [Abstract]
Defined benefit plans, Prior service costs, net of tax		0	1
Defined benefit plans, Net actuarial (gain) loss, net of tax		40	47
Total other comprehensive income (loss)		338	(8)
Comprehensive income (loss)		(1,502)	546
LG And E And KU Energy LLC [Member]
Net income (loss)	[1]	146	135
Other Comprehensive (Income) Loss, Defined Benefit Plans, after Reclassification Adjustment, after Tax [Abstract]
Total other comprehensive income (loss)		$ 3	$ 1

[1] Net income approximates comprehensive income.