v3.25.2
Shareholders' Equity - Schedule of Changes in AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Movement in Accumulated Other Comprehensive Income [Roll Forward]            
Beginning balance $ 13,334 $ 13,539 $ 11,560 $ 11,286 $ 13,539 $ 11,286
Other comprehensive income (loss), net of income taxes 37 (7) 19 11 30 30
Ending balance 13,803 13,334 11,781 11,560 13,803 11,781
Total            
Movement in Accumulated Other Comprehensive Income [Roll Forward]            
Beginning balance (2,309) (2,302) (2,180) (2,191) (2,302) (2,191)
OCI before reclassifications 20   (3)   (6) (9)
Amounts reclassified from AOCI 17   22   36 39
Other comprehensive income (loss), net of income taxes 37 (7) 19 11 30 30
Ending balance (2,272) (2,309) (2,161) (2,180) (2,272) (2,161)
Gains (losses) on Cash Flow Hedges            
Movement in Accumulated Other Comprehensive Income [Roll Forward]            
Beginning balance (4) (6) (10) (10) (6) (10)
OCI before reclassifications 0   0   0 0
Amounts reclassified from AOCI 1   2   3 2
Other comprehensive income (loss), net of income taxes 1   2   3 2
Ending balance (3) (4) (8) (10) (3) (8)
Pension and OPEB Items            
Movement in Accumulated Other Comprehensive Income [Roll Forward]            
Beginning balance (2,279) (2,262) (2,143) (2,157) (2,262) (2,157)
OCI before reclassifications 0   (2)   (34) (5)
Amounts reclassified from AOCI 16   20   33 37
Other comprehensive income (loss), net of income taxes 16   18   (1) 32
Ending balance (2,263) (2,279) (2,125) (2,143) (2,263) (2,125)
Foreign Currency Items            
Movement in Accumulated Other Comprehensive Income [Roll Forward]            
Beginning balance (26) (34) (27) (24) (34) (24)
OCI before reclassifications 20   (1)   28 (4)
Amounts reclassified from AOCI 0   0   0 0
Other comprehensive income (loss), net of income taxes 20   (1)   28 (4)
Ending balance $ (6) $ (26) $ (28) $ (27) $ (6) $ (28)