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Borrowings - Additional Information (Details)
May 13, 2021
USD ($)
patent
May 15, 2020
May 01, 2021
USD ($)
Jul. 25, 2020
USD ($)
Debt Instrument [Line Items]        
Derivative, notional amount     $ 6,793,000,000 $ 7,395,000,000
Unsecured facility | Revolving credit facility        
Debt Instrument [Line Items]        
Credit facility, term   364 days    
Line of credit facility, amount outstanding     0  
Subsequent event | Unsecured facility | Revolving credit facility        
Debt Instrument [Line Items]        
Credit facility, term 5 years      
Maximum borrowing capacity $ 3,000,000,000.0      
Additional credit facility upon agreement (up to) $ 2,000,000,000.0      
Number of extension options | patent 2      
Subsequent event | Unsecured facility | Revolving credit facility | Pound Sterling | Minimum        
Debt Instrument [Line Items]        
Interest rate 0.00%      
Subsequent event | Unsecured facility | Revolving credit facility | Federal Funds rate | U.S. dollars        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.50%      
Subsequent event | Unsecured facility | Revolving credit facility | LIBOR | U.S. dollars        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.00%      
Interest rate swaps | Fair Value Hedge | Derivatives designated as hedging instruments        
Debt Instrument [Line Items]        
Derivative, notional amount     2,000,000,000.0  
Commercial paper        
Debt Instrument [Line Items]        
Commercial paper, maximum borrowing limit (up to)     10,000,000,000.0  
Commercial paper outstanding     $ 0 $ 0