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Hedging Activities - Schedule of Fair Value of Derivatives (Details) - Derivatives designated for hedge accounting - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Derivatives, Fair Value [Line Items]    
Total $ 119 $ 116
Total 95 172
Cross-currency swaps | Balance Sheet Location [Axis]: us-gaap:AccruedLiabilitiesCurrent    
Derivatives, Fair Value [Line Items]    
Liability 79 160
Cross-currency swaps | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivatives, Fair Value [Line Items]    
Asset 49 40
U.S. Dollar notional amount, asset 542 542
Cross-currency swaps | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Liability 0 0
Cross-currency swaps | Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent    
Derivatives, Fair Value [Line Items]    
Asset 70 76
U.S. Dollar notional amount, asset 5,008 5,008
Interest Rate Swaps (non-current) | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Asset 0 0
Liability 16 12
U.S. Dollar, notional amount, liability $ 750  
Floating interest rate swaps | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
U.S. Dollar, notional amount, liability   $ 750