CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019
Net Income	$ 281	$ 475		$ 1,179		$ 1,382
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	643	(285)		291		(368)
Qualifying derivatives, net of tax	(52)	16		(16)		32
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax [Abstract]
Defined benefit plan, Net actuarial gain (loss), net of tax	(16)	(5)		(17)		(10)
Reclassifications from AOCI - (gains) losses, net of tax expense (benefit):
Qualifying derivatives, net of tax	48	(22)		25		(25)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Defined benefit plan, Prior service costs, net of tax	0	0		2		1
Defined benefit plan, Net actuarial (gain) loss, net of tax	52	20		146		62
Total other comprehensive income (loss)	675	(276)		431		(308)
Comprehensive income	956	199		1,610		1,074
Other Comprehensive Income (Loss), Defined Benefit Plans, Gain (Loss) Arising During Period, Tax	5	2		6		4
Other Comprehensive (Income) Loss, Defined Benefit Plans, Prior Service Costs (Credit), Reclassification Adjustment from AOCI, Tax	(1)	(1)		(1)		(1)
Other Comprehensive (Income) Loss, Defined Benefit Plans, Net Actuarial Gain(Loss), Reclassification Adjustment from AOCI, Tax	(12)	(5)		(35)		(16)
LG And E And KU Energy LLC [Member]
Net Income	137	158	[1]	355	[1]	388	[1]
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax [Abstract]
Defined benefit plan, Net actuarial gain (loss), net of tax	(8)	0		(9)		(2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Defined benefit plan, Prior service costs, net of tax	0	0		1		1
Defined benefit plan, Net actuarial (gain) loss, net of tax	5	0		7		(1)
Total other comprehensive income (loss)	(3)	0		(1)		(2)
Comprehensive income	134	158		354		386
Other Comprehensive Income (Loss), Defined Benefit Plans, Gain (Loss) Arising During Period, Tax	3	0		3		0
Other Comprehensive (Income) Loss, Defined Benefit Plans, Prior Service Costs (Credit), Reclassification Adjustment from AOCI, Tax	0	0		0		0
Other Comprehensive (Income) Loss, Defined Benefit Plans, Net Actuarial Gain(Loss), Reclassification Adjustment from AOCI, Tax	$ 2	$ 0		$ 3		$ 0

[1] Net income approximates comprehensive income.