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Debt - Additional Information (Details)
3 Months Ended
Mar. 31, 2022
USD ($)
extension
Apr. 30, 2022
USD ($)
Mar. 31, 2022
EUR (€)
Feb. 28, 2022
USD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]          
Total face value of long-term debt $ 50,553,000,000       $ 50,553,000,000
Commercial Paper          
Debt Instrument [Line Items]          
Commercial paper, maximum borrowing capacity $ 20,000,000,000   € 3,000,000,000 $ 10,000,000,000  
Commercial paper, term (will not exceed) 397 days        
Commercial paper $ 10,800,000,000       $ 725,000,000
Commercial paper, weighted average effective interest rate 0.56%   0.56%   0.08%
Senior Notes          
Debt Instrument [Line Items]          
Total face value of long-term debt $ 49,700,000,000        
Estimated fair value of notes 49,000,000,000       $ 53,300,000,000
Senior Notes | Subsequent Event          
Debt Instrument [Line Items]          
Issuance amount   $ 12,800,000,000      
Senior Notes | Minimum | Subsequent Event          
Debt Instrument [Line Items]          
Stated interest rates   2.73%      
Effective interest rates   2.83%      
Senior Notes | Maximum | Subsequent Event          
Debt Instrument [Line Items]          
Stated interest rates   4.10%      
Effective interest rates   4.15%      
Credit Facility | Revolving Credit Facility          
Debt Instrument [Line Items]          
Total face value of long-term debt 803,000,000       803,000,000
Credit Facility | Revolving Credit Facility | October 2016 Revolving Credit Facility          
Debt Instrument [Line Items]          
Revolving credit facility maximum borrowing capacity $ 1,000,000,000        
Commitment fee percentage 0.50%        
Borrowings outstanding $ 803,000,000       $ 803,000,000
Weighted average interest rate 2.70%   2.70%   2.70%
Collateral amount $ 918,000,000       $ 918,000,000
Credit Facility | Revolving Credit Facility | October 2016 Revolving Credit Facility | LIBOR          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent) 1.40%        
Credit Facility | Revolving Credit Facility | April 2018 Revolving Credit Facility          
Debt Instrument [Line Items]          
Revolving credit facility maximum borrowing capacity $ 10,000,000,000     $ 7,000,000,000  
Commitment fee percentage 0.03%        
Borrowings outstanding $ 0       $ 0
Number of term extensions | extension 3        
Additional term 1 year        
Credit Facility | Revolving Credit Facility | April 2018 Revolving Credit Facility | LIBOR          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent) 0.45%        
Credit Facility | Letter of Credit | April 2018 Revolving Credit Facility          
Debt Instrument [Line Items]          
Unused letters of credit $ 10,200,000,000