CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 1,469	$ 1,746	$ 1,827
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	267	108	(444)
Qualifying derivatives, net of tax	(19)	(11)	36
Defined benefit plans:
Prior service costs, net of tax	(1)	(1)	(11)
Net actuarial gain (loss), net of tax	(341)	(592)	(187)
Reclassifications from AOCI - (gains) losses, net of tax expense (benefit):
Qualifying derivatives, net of tax	24	13	(29)
Defined benefit plans:
Prior service costs, net of tax	3	2	2
Net actuarial (gain) loss, net of tax	205	87	142
Total other comprehensive income (loss)	138	(394)	(491)
Comprehensive income	1,607	1,352	1,336
LG And E And KU Energy LLC [Member]
Net income	450	468	445
Defined benefit plans:
Prior service costs, net of tax	(1)	(1)	0
Net actuarial gain (loss), net of tax	(7)	(6)	7
Defined benefit plans:
Prior service costs, net of tax	2	1	2
Net actuarial (gain) loss, net of tax	13	2	8
Total other comprehensive income (loss)	7	(4)	17
Comprehensive income	$ 457	$ 464	$ 462