v3.26.3
Fair Value Measurements and Financial Instruments - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Dec. 31, 2025
Derivative [Line Items]        
Debt instrument $ 333     $ 304
Net Carrying Value 115     109
Foreign Currency Contract, Asset, Fair Value Disclosure 13      
Interest Rate Derivative Assets, at Fair Value 3      
Trade Names        
Derivative [Line Items]        
Net Carrying Value 8     7
Designated as Hedging Instrument | Liability | Currency Swap        
Derivative [Line Items]        
Derivative Asset 6     16
Derivative liability 210     200
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap        
Derivative [Line Items]        
Derivative instruments, gain (loss) reclassification from accumulated OCI to income, estimated amount to be transferred (1)   $ (3)  
Derivative Asset 10     2
Derivative liability $ 250     $ 250
Credit Concentration Risk | Accounts Receivable | Ford And Affiliates        
Derivative [Line Items]        
Concentration risk, percentage 19.00% 12.00%    
Credit Concentration Risk | Accounts Receivable | Volkswagen AG        
Derivative [Line Items]        
Concentration risk, percentage 12.00% 11.00%