v3.26.3
ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance $ 1,254 $ 799 $ 971 $ 727
Equity, ending balance 1,341 863 1,341 863
Accumulated other comprehensive income / (loss)        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance 34 26 54 (14)
Other comprehensive income / (loss) before reclassification (3) (1) (17) 42
Amounts reclassified from accumulated other comprehensive income / (loss) to the income statement (3) (4) (11) (9)
Amounts reclassified from accumulated other comprehensive income / (loss) to retained earnings     2 2
Equity, ending balance 28 21 28 21
Post-employment benefit plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance 107 81 115 84
Other comprehensive income / (loss) before reclassification 1 (2) (1) 0
Amounts reclassified from accumulated other comprehensive income / (loss) to the income statement (3) (3) (9) (8)
Amounts reclassified from accumulated other comprehensive income / (loss) to retained earnings     0 0
Equity, ending balance 105 76 105 76
Cash flow hedges        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance 0 13 8 (14)
Other comprehensive income / (loss) before reclassification (2) (1) (8) 26
Amounts reclassified from accumulated other comprehensive income / (loss) to the income statement 0 (1) (2) (1)
Amounts reclassified from accumulated other comprehensive income / (loss) to retained earnings     0 0
Equity, ending balance (2) 11 (2) 11
Currency translation adjustments        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Equity, beginning balance (73) (68) (69) (84)
Other comprehensive income / (loss) before reclassification (2) 2 (8) 16
Amounts reclassified from accumulated other comprehensive income / (loss) to the income statement 0 0 0 0
Amounts reclassified from accumulated other comprehensive income / (loss) to retained earnings     2 2
Equity, ending balance $ (75) $ (66) $ (75) $ (66)