Employee Benefit Plans - Fair Value of Plan Assets by Asset Category (Details) - Pension Plans - USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 164,000,000	$ 158,000,000	$ 213,000,000
Diversified debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	135,000,000	131,000,000
Diversified equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	25,000,000	25,000,000
Cash and Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	4,000,000	2,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	34,000,000	28,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) | Diversified debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	12,000,000	8,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) | Diversified equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	18,000,000	18,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	4,000,000	2,000,000
Significant Other Observable Inputs (Level 2)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	130,000,000	130,000,000
Significant Other Observable Inputs (Level 2) | Diversified debt Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	123,000,000	123,000,000
Significant Other Observable Inputs (Level 2) | Diversified equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	7,000,000	7,000,000
Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair Value of Plan Assets	$ 0	$ 0