XML 59 R49.htm IDEA: XBRL DOCUMENT v3.22.4
Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Long-term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Sep. 30, 2022
Dec. 31, 2021
Carrying amount      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Long-term debt $ 6,759 $ 6,665 $ 6,580
Estimated fair value      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Long-term debt $ 6,350 $ 6,189 $ 7,048