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Hedging Activities - Narrative (Details)
€ in Millions, £ in Millions, $ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
GBP (£)
Mar. 31, 2022
USD ($)
Mar. 31, 2022
EUR (€)
Derivative [Line Items]              
Gains on termination of fixed interest rate swaps $ (97)   $ (97)        
Disposed of by sale | U.K. Disposal Group (Disposal Group)              
Derivative [Line Items]              
Reclassification of gains from AOCI   $ 26          
Disposed of by sale | European Businesses (Disposal Group)              
Derivative [Line Items]              
Reclassification from AOCI to earnings   112          
Fair Value Hedges | USD | Interest Rate Swap Entered Into YTD | Derivatives designated for hedge accounting              
Derivative [Line Items]              
Derivative, notional amount 750   750        
Cash Flow Hedges | USD | Fixed interest rate swaps | Derivatives designated for hedge accounting              
Derivative [Line Items]              
Derivative, notional amount 0 $ 500 $ 0     $ 500  
Euro Denominated Notes | Net Investment Hedges | Derivatives designated for hedge accounting              
Derivative [Line Items]              
Reclassification from AOCI to earnings $ 112            
British Pound Sterling Denominated Notes | Term Loan              
Derivative [Line Items]              
Debt outstanding | £         £ 450    
Derivatives designated as net investment hedges | Fair Value Hedges | Euro Member Countries, Euro | Derivatives designated for hedge accounting              
Derivative [Line Items]              
Derivative, notional amount | €       € 1,100     € 0