Quarterly report pursuant to Section 13 or 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in AOCI (loss) related to shareholders' equity (Details)

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ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in AOCI (loss) related to shareholders' equity (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance     $ 1,657  
Ending balance $ 1,666 $ 1,643 1,666 $ 1,643
Foreign Currency Translation        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (1) (1) 0 (1)
Other comprehensive gain (loss) before reclassifications, net of tax 0 0 (1) 0
Ending balance (1) (1) (1) (1)
Derivative Instruments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance (150) (168) (170) (16)
Other comprehensive gain (loss) before reclassifications 2 (31) (31) (208)
Income tax benefit 0 7 8 51
Other comprehensive gain (loss) before reclassifications, net of tax 2 (24) (23) (157)
(Gains) losses reclassified from AOCI to net income 61 55 120 30
Income tax expense (benefit) (16) (13) (30) (7)
Net losses (gains) reclassified from AOCI to net income 45 42 90 23
Ending balance (103) (150) (103) (150)
Pension and OPEB        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance 1,799 1,820 1,827 1,847
(Gains) losses reclassified from AOCI to net income (39) (36) (77) (71)
Income tax expense (benefit) 10 10 20 18
Net losses (gains) reclassified from AOCI to net income (29) (26) (57) (53)
Ending balance $ 1,770 $ 1,794 $ 1,770 $ 1,794