v3.26.3
Debt (Credit Agreement) (Details) - Five-Year Revolving Credit Facility - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Oct. 15, 2026
Debt    
Borrowing capacity, maximum $ 510  
Early maturity trigger, principal due within 91 days 325  
Early maturity trigger available cash 250  
Permitted commitment increase 250  
Credit facility amount outstanding 0  
Letters of credit issued and outstanding 97  
Credit facility available borrowing capacity $ 413  
Spread on variable rate basis (as a percent) 2.75%  
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrMember  
Variable rate spread adjustment (as a percent) 0.10%  
Commitment fee (as a percent) 0.50%  
Subsequent Event    
Debt    
Borrowing capacity, maximum   $ 750
Minimum    
Debt    
Commitment fee (as a percent) 0.375%  
Maximum    
Debt    
Commitment fee (as a percent) 1.00%