v3.26.1
Changes in Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Balance $ 9,423 $ 9,159 $ 9,397 $ 8,993 $ 8,993
Aggregate adjustment for the period (1) (21) 298 (98) 461  
Balance 8,753 9,872 8,753 9,872 9,397
Accumulated other comprehensive loss (Note 13) (440) (714) (440) (714) (641)
Designated as Hedging Instrument | Net Investment Hedging          
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Gain (loss) on net investment hedge, net of tax (16)   (46) 162  
Foreign currency translation adjustments:          
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Balance (807) (935) (741) (1,036) (1,036)
Aggregate adjustment for the period (1) (30) 218 (96) 319  
Spin-off of Versigent 373 0 373 0  
Acquisition of redeemable noncontrolling interest 7 0 7 0  
Balance (457) (717) (457) (717) (741)
Foreign currency translation adjustments: | TTTech Auto AG          
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Aggregate adjustment for the period (1)         (6)
Gains (losses) on derivatives:          
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Balance 103 (59) 115 (121) (121)
Other comprehensive income (loss) before reclassifications (net of tax effect) 22 67 46 128  
Reclassification to income (net of tax effect) (15) 4 (51) 5  
Balance 22 12 22 12 115
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax (3) (12) (7) (23)  
Net tax effect of Reclassification Adjustment from AOCI on Derivatives 3 (2) 9 (5)  
Adjustment for recently adopted accounting pronouncements (88) 0 (88) 0  
Pension and postretirement plans:          
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Balance (16) (13) (15) (13) (13)
Other comprehensive income (loss) before reclassifications (net of tax effect) 0 (2) (1) (2)  
Reclassification to income (net of tax effect) 1 1 1 1  
Balance (7) (14) (7) (14) (15)
Net tax effect of Other comprehensive income before reclassifications 0 1 0 1  
Adjustment for recently adopted accounting pronouncements 8 0 8 0  
Unrealized gains (losses) on available-for-sale debt securities:          
AOCI Attributable to Parent, Net of Tax [Roll Forward]          
Balance 1 (4) 0 (4) (4)
Other comprehensive income (loss) before reclassifications (net of tax effect) 1 9 2 9  
Balance 2 5 2 5 $ 0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment and Tax $ 0 $ (1) $ 0 $ (1)