v3.26.1
Accumulated Other Comprehensive Loss - Changes in Components of AOCL (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance $ 1,903 $ 1,665 $ 1,867 $ 1,651
Ending Balance 1,979 1,753 1,979 1,753
Cross-currency Swaps        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance 0 0 0 0
Other comprehensive (loss) income before reclassifications (7) 0 (7) 0
Amounts reclassified from AOCL (1) 0 (1) 0
Income tax benefit 2   2 0
Net current period other comprehensive (loss) income (6) 0 (6) 0
Ending Balance (6) 0 (6) 0
Pension and OPEB liability adjustments        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (21) (4) (20) (3)
Other comprehensive (loss) income before reclassifications 0 0 0 0
Amounts reclassified from AOCL (1) (2) (2) (4)
Income tax benefit 0   0 1
Net current period other comprehensive (loss) income (1) (2) (2) (3)
Ending Balance (22) (6) (22) (6)
Interest rate swaps        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance 0 4 0 5
Other comprehensive (loss) income before reclassifications 0 1 0 1
Amounts reclassified from AOCL 0 (2) 0 (4)
Income tax benefit 0   0 1
Net current period other comprehensive (loss) income 0 (1) 0 (2)
Ending Balance 0 3 0 3
Foreign currency items        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (68) (47) (36) (53)
Other comprehensive (loss) income before reclassifications (38) 13 (70) 19
Amounts reclassified from AOCL 0 0 0 0
Income tax benefit 0   0 0
Net current period other comprehensive (loss) income (38) 13 (70) 19
Ending Balance (106) (34) (106) (34)
Accumulated Other Comprehensive Loss, net of tax        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning Balance (89) (47) (56) (51)
Other comprehensive (loss) income before reclassifications (45) 14 (77) 20
Amounts reclassified from AOCL (2) (4) (3) (8)
Income tax benefit 2   2 2
Net current period other comprehensive (loss) income (45) 10 (78) 14
Ending Balance $ (134) $ (37) $ (134) $ (37)