Fair Value Measurements (Schedule of Carrying Values and Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying Value	$ 170	$ 170
Equity Securities, FV-NI and without Readily Determinable Fair Value	0	0
Insurance contracts in nonqualified pension trusts, carrying amount	18	21
Insurance contracts in nonqualified pension trusts, fair value	18	21
Long-term debt, including current installments of long-term debt, carrying amount	12,527	13,400
Long-term debt, including current installments of long-term debt, fair value	12,615	13,662
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities, FV-NI and without Readily Determinable Fair Value	0	0
Insurance contracts in nonqualified pension trusts, fair value	18	21
Long-term debt, including current installments of long-term debt, fair value	12,470	13,514
Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities, FV-NI and without Readily Determinable Fair Value	0	0
Insurance contracts in nonqualified pension trusts, fair value	0	0
Long-term debt, including current installments of long-term debt, fair value	$ 145	$ 148