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Financial Instruments (Details)
€ in Millions, £ in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
GBP (£)
Sep. 30, 2022
EUR (€)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
GBP (£)
Dec. 31, 2021
EUR (€)
Derivative [Line Items]                  
Net proceeds from settlement of existing cross-currency interest rate swaps     $ (684) $ 24          
Net investment hedges | Senior Euro Notes Maturing 2022 to 2039 and ECP Notes | Senior notes                  
Derivative [Line Items]                  
Notional amount | €           € 7,848     € 8,275
Net investment hedges | Sterling senior notes due 2022 to 2031 | Senior notes                  
Derivative [Line Items]                  
Notional amount | £         £ 665     £ 1,193  
Interest rate swap                  
Derivative [Line Items]                  
Net proceeds from settlement of existing cross-currency interest rate swaps     684            
Interest rate swap | Fair value hedging                  
Derivative [Line Items]                  
Notional amount $ 1,854   1,854   925 500 $ 1,854 925 500
Derivative liability fair value 639   639            
Derivative asset fair value             85    
Interest rate swap | Net investment hedges                  
Derivative [Line Items]                  
Derivative asset fair value 950   950       $ 258    
Currency forward contract | Net investment hedges                  
Derivative [Line Items]                  
Gain (loss) for the change in fair value on derivative used in net investment hedge, after tax, recorded in other comprehensive earnings loss $ 983 $ 386 $ 2,116 $ 678          
Currency swap | Net investment hedges                  
Derivative [Line Items]                  
Notional amount         £ 2,386 € 6,343   £ 2,345 € 5,906