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Financing (Commercial Paper Programs and Credit Facilities) (Narrative) (Details)
€ in Millions
Dec. 31, 2023
EUR (€)
Aug. 11, 2023
USD ($)
Dec. 31, 2023
USD ($)
Aug. 10, 2023
USD ($)
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
USD ($)
Line of Credit Facility [Line Items]            
Debt discounts, premiums and debt issuance costs     $ 107,000,000     $ 118,000,000
Long-term debt     $ 18,402,000,000     19,677,000,000
Euro-denominated commercial paper | Commercial paper            
Line of Credit Facility [Line Items]            
Debt, weighted average annual interest rate, basis points 4.20%   4.20%      
Long-term debt weighted average maturity 47 days          
Long-term debt, commercial paper     $ 1,000,000,000      
Long-term debt € 929   1,026,000,000   € 1,900 $ 2,013,000,000
Revolving credit facility | Multiyear Credit Facility, Superseded            
Line of Credit Facility [Line Items]            
Credit facility, borrowings outstanding   $ 0        
Revolving credit facility | Multiyear Credit Facility, Superseded | Line of Credit            
Line of Credit Facility [Line Items]            
Line of credit, maximum borrowing capacity       $ 5,000,000,000    
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Debt Rate, Condition Two            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   1.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Line of Credit            
Line of Credit Facility [Line Items]            
Line of credit, maximum borrowing capacity   $ 5,000,000,000        
Option to extend period   1 year        
Additional borrowing capacity   $ 2,500,000,000        
Credit facility, borrowings outstanding     $ 0      
Debt instrument, covenants, leverage ratio   0.65        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | SOFR | Debt Rate, Condition One            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   1.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Federal funds rate            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   0.50%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Base rate            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   0.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Minimum            
Line of Credit Facility [Line Items]            
Commitment fee, percent   400.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Minimum | Debt Rate, Condition Two            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   0.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Minimum | Swing Line Loans            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   5850.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Minimum | Alternative Currency Loans            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   5850.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Minimum | SOFR            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   0.585%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Maximum            
Line of Credit Facility [Line Items]            
Commitment fee, percent   1100.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Maximum | Debt Rate, Condition Two            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   150.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Maximum | Swing Line Loans            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   10150.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Maximum | Alternative Currency Loans            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   10150.00%        
Revolving credit facility | Third Amended and Restated Multiyear Credit Facility | Maximum | SOFR            
Line of Credit Facility [Line Items]            
Basis spread percentage to determine floating interest rate   10150.00%