v3.20.4
Debt - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Mar. 31, 2020
Sep. 30, 2016
Jan. 31, 2021
Jan. 26, 2020
Jan. 27, 2019
Debt Instrument [Line Items]          
Notice period   30 days      
Issuance of debt, net of issuance costs     $ 4,968,000,000 $ 0 $ 0
Net proceeds from debt issuance   $ 1,980,000,000      
Additional borrowing capacity from Revolving Credit Facility     425,000,000    
Outstanding commercial paper     0    
Revolving Credit Facility          
Debt Instrument [Line Items]          
Current borrowing capacity     575,000,000    
Line of credit outstanding     0    
Commercial Paper          
Debt Instrument [Line Items]          
Current borrowing capacity     $ 575,000,000    
2.85% Notes Due 2030          
Debt Instrument [Line Items]          
Face amount of debt issued $ 1,500,000,000        
Interest rate (as percent)     2.85%    
3.50% Notes Due 2040          
Debt Instrument [Line Items]          
Face amount of debt issued 1,000,000,000.00        
Interest rate (as percent)     3.50%    
3.50% Notes Due 2050          
Debt Instrument [Line Items]          
Face amount of debt issued 2,000,000,000.00        
Interest rate (as percent)     3.50%    
3.70% Notes Due 2060          
Debt Instrument [Line Items]          
Face amount of debt issued $ 500,000,000        
Interest rate (as percent)     3.70%    
March 2020 Notes          
Debt Instrument [Line Items]          
Notice period 30 days        
Issuance of debt, net of issuance costs $ 4,970,000,000        
2.20% Notes Due 2021          
Debt Instrument [Line Items]          
Face amount of debt issued   1,000,000,000.00      
Interest rate (as percent)     2.20%    
3.20% Notes Due 2026          
Debt Instrument [Line Items]          
Face amount of debt issued   $ 1,000,000,000.00      
Interest rate (as percent)     3.20%