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Borrowings and Credit Agreements - Long-term Borrowings (Details) - USD ($)
1 Months Ended 12 Months Ended
Aug. 18, 2021
Sep. 30, 2022
Aug. 31, 2022
May 31, 2022
Dec. 31, 2021
Aug. 31, 2021
Dec. 31, 2020
Aug. 31, 2020
Mar. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]                        
Redeemed principal amount                   $ 4,211,000,000 $ 10,254,000,000 $ 15,631,000,000
Proceeds from debt $ 987,000,000                      
Payments for derivative instruments                 $ 7,000,000 0 0 7,000,000
Loss on net cash flow hedges                 $ 5,000,000      
Premium paid in excess of debt principal         $ 80,000,000 $ 332,000,000 $ 619,000,000 $ 706,000,000        
Write off of deferred debt issuance cost         8,000,000 26,000,000 45,000,000 47,000,000        
Debt extinguishment fees         1,000,000 5,000,000 10,000,000 13,000,000        
Loss on early extinguishment of debt         $ 89,000,000 $ 363,000,000 674,000,000 766,000,000   $ 0 $ 452,000,000 $ 1,440,000,000
Senior Notes | 3.5% senior notes due July 2022                        
Debt Instrument [Line Items]                        
Debt interest rate       3.50%           3.50%    
Redeemed principal amount       $ 1,500,000,000                
Senior Notes | 2.75% senior notes due November 2022                        
Debt Instrument [Line Items]                        
Debt interest rate     2.75%             2.75%    
Redeemed principal amount     $ 1,000,000,000                  
Senior Notes | 2.75% senior notes due December 2022                        
Debt Instrument [Line Items]                        
Debt interest rate   2.75%               2.75%    
Redeemed principal amount   $ 1,250,000,000                    
Senior Notes | 4.75% senior notes due December 2022                        
Debt Instrument [Line Items]                        
Debt interest rate   4.75%               4.75%    
Redeemed principal amount   $ 399,000,000                    
Senior Notes | 2.125% senior notes due September 2031                        
Debt Instrument [Line Items]                        
Debt interest rate 2.125%                 2.125%    
Debt face amount $ 1,000,000,000                      
Senior Notes | 3.625% senior notes due April 2027                        
Debt Instrument [Line Items]                        
Debt interest rate                 3.625% 3.625%    
Debt face amount                 $ 750,000,000      
Senior Notes | 3.75% senior notes due April 2030                        
Debt Instrument [Line Items]                        
Debt interest rate                 3.75% 3.75%    
Debt face amount                 $ 1,500,000,000      
Senior Notes | 4.125% senior notes due April 2040                        
Debt Instrument [Line Items]                        
Debt interest rate                 4.125% 4.125%    
Debt face amount                 $ 1,000,000,000      
Senior Notes | 4.25% senior notes due April 2050                        
Debt Instrument [Line Items]                        
Debt interest rate                 4.25% 4.25%    
Debt face amount                 $ 750,000,000      
Senior Notes | 3.7% senior notes due 2023                        
Debt Instrument [Line Items]                        
Debt interest rate         3.70%           3.70%  
Aggregate principal of debt extinguished         $ 2,300,000,000              
Senior Notes | 4.3% senior notes due 2028                        
Debt Instrument [Line Items]                        
Debt interest rate           4.30%            
Aggregate principal of debt extinguished           $ 2,000,000,000            
Senior Notes | Outstanding Senior Notes                        
Debt Instrument [Line Items]                        
Aggregate principal of debt extinguished             $ 4,500,000,000 $ 6,000,000,000        
Senior Notes | 4% senior notes due December 2023                        
Debt Instrument [Line Items]                        
Debt interest rate             4.00% 4.00%   4.00%   4.00%
Aggregate principal of debt extinguished             $ 113,000,000 $ 723,000,000        
Senior Notes | 3.7% senior notes due March 2023                        
Debt Instrument [Line Items]                        
Debt interest rate             3.70% 3.70%       3.70%
Aggregate principal of debt extinguished             $ 1,400,000,000 $ 2,300,000,000        
Senior Notes | 4.1% senior notes due March 2025                        
Debt Instrument [Line Items]                        
Debt interest rate             4.10% 4.10%   4.10%   4.10%
Aggregate principal of debt extinguished             $ 1,000,000,000 $ 3,000,000,000        
Senior Notes | 4.3% senior notes due 2028                        
Debt Instrument [Line Items]                        
Debt interest rate             4.30%         4.30%
Aggregate principal of debt extinguished             $ 2,000,000,000