Fair Value of Financial Instruments Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Surrender Value, Fair Value Disclosure	$ 29	$ 31
Long-term Debt	3,786	3,646
Unamortized Debt Issuance Expense	13	13
Long-term Debt, Fair Value	$ 3,212	$ 2,984