Quarterly report pursuant to Section 13 or 15(d)

ACCUMULATED OTHER COMPREHENSIVE LOSS - Accumulated Other Comprehensive Income (Loss) Components (Details)

v3.21.1
ACCUMULATED OTHER COMPREHENSIVE LOSS - Accumulated Other Comprehensive Income (Loss) Components (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Changes in derivative financial instruments, Net of taxes $ 7 $ (3)
Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Amortization of pension and OPEB liability, Net actuarial loss 9 7
Amortization of pension and OPED liability, Income tax benefit (2) (1)
Amortization of pension and OPEB liability, Net of taxes 7 6
Changed in derivative finanical instruments, commodity contracts (1) 3
Changes in derivative financial instruments, Income tax benefit 0 (1)
Changes in derivative financial instruments, Net of taxes (1) 2
Total reclassifications for the period, net of tax $ 6 $ 8