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Fair Value Measurements (Details 2) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Estimate of Fair Value Measurement    
Assets and liabilities measured at fair value on a recurring basis    
Fair value of long-term debt, including current portion $ 2,952 $ 2,894
Reported Value Measurement    
Assets and liabilities measured at fair value on a recurring basis    
Fair value of long-term debt, including current portion 2,970 2,968
Recurring basis    
Assets and liabilities measured at fair value on a recurring basis    
Cash equivalents 1,546 1,824
Nonqualified employee benefit trusts 18 17
Derivative Liability (5) (35)
Derivative Asset 4 1
Recurring basis | Quoted Prices in Active Markets (Level 1)    
Assets and liabilities measured at fair value on a recurring basis    
Cash equivalents 1,546 1,824
Nonqualified employee benefit trusts 18 17
Derivative Liability 0 0
Derivative Asset 0 0
Recurring basis | Significant Other Observable Inputs (Level 2)    
Assets and liabilities measured at fair value on a recurring basis    
Cash equivalents 0 0
Nonqualified employee benefit trusts 0 0
Derivative Liability (5) (35)
Derivative Asset 4 1
Recurring basis | Fair Value, Inputs (Level 3)    
Assets and liabilities measured at fair value on a recurring basis    
Cash equivalents 0 0
Nonqualified employee benefit trusts 0 0
Derivative Liability 0 0
Derivative Asset $ 0 $ 0