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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Tax effect of foreign currency translation adjustments arising during the period $ 0 $ (2) $ (1)
Tax effect of qualifying derivatives arising during the period 2 (9) 19
Tax effect of defined benefit plans - prior service costs arising during period 0 3 0
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period 119 44 72
Tax effect of equity investees' other comprehensive (income) loss reclassified from AOCI 0 0 0
Tax effect of qualifying derivatives reclassified from AOCI 5 (6) 18
Tax effect of defined benefit plans - prior service costs reclassified from AOCI (1) 0 (1)
Tax effect of defined benefit plans - net actuarial (gain) loss reclassified from AOCI (22) (36) (37)
LG And E And KU Energy LLC [Member]      
Tax effect of defined benefit plans - prior service costs arising during period 0 0 (1)
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period 0 0 13
Tax effect of equity investees' other comprehensive (income) loss reclassified from AOCI 0 0 0
Tax effect of defined benefit plans - prior service costs reclassified from AOCI 0 0 1
Tax effect of defined benefit plans - net actuarial (gain) loss reclassified from AOCI $ (1) $ 5 $ 2