v3.26.1
Debt (Narrative) (Details) - USD ($)
1 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Jun. 30, 2026
May 31, 2026
Feb. 28, 2026
Dec. 31, 2025
Debt Instrument [Line Items]            
Commercial Paper     $ 1,000,000,000.0     $ 0
Other Debt Facilities            
Debt Instrument [Line Items]            
Revolving credit facility, amount outstanding     0     0
Debt instrument, unused borrowing capacity     120,000,000     122,000,000
Letters of credit outstanding, amount     $ 149,000,000     150,000,000
Senior notes – 3.750% due 2026            
Debt Instrument [Line Items]            
Interest rate (as a percent) 3.75%   3.75%      
Senior notes – 3.750% due 2026 | Senior Notes            
Debt Instrument [Line Items]            
Repayments of debt $ 600,000,000          
Senior notes – 4.950% due 2036            
Debt Instrument [Line Items]            
Interest rate (as a percent)     4.95%   4.95%  
Senior notes – 4.950% due 2036 | Senior Notes            
Debt Instrument [Line Items]            
Debt instrument, amount         $ 600,000,000  
Senior notes – 3.500% due 2025            
Debt Instrument [Line Items]            
Interest rate (as a percent)   3.50%        
Senior notes – 3.500% due 2025 | Senior Notes            
Debt Instrument [Line Items]            
Repayments of debt   $ 500,000,000        
Revolving Credit Facility            
Debt Instrument [Line Items]            
Revolving credit facility, borrowing capacity     $ 4,250,000,000 $ 3,500,000,000    
Debt instrument, term     5 years      
Revolving Credit Facility | Amended Revolving Credit Facility            
Debt Instrument [Line Items]            
Revolving credit facility, amount outstanding     $ 0     $ 0
Commercial Paper            
Debt Instrument [Line Items]            
Debt instrument, amount     $ 4,250,000,000 $ 3,500,000,000    
Effective interest rate (as a percent)     4.02%