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Basis of Presentation (Details) - USD ($)
Dec. 31, 2021
Jul. 30, 2021
Apr. 30, 2020
Debt Instrument [Line Items]      
Line of credit balance $ 14,004,000,000    
Medium-term Notes      
Debt Instrument [Line Items]      
Long-term debt     $ 1,200,000,000
Line of Credit | Revolving Credit Facility      
Debt Instrument [Line Items]      
Line of credit balance   $ 1,950,000,000 $ 1,800,000,000