Fair Value Measurements - Schedule of Pension Plan Assets at Fair Value by Level (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	$ 2,422	$ 2,327
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	2,422	2,327	$ 3,016
Pension Plan | Total
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	1,409	1,265
Pension Plan | Total | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	340	335
Pension Plan | Total | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	32	29
Pension Plan | Total | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	255	157
Pension Plan | Total | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	646	647
Pension Plan | Total | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	126	88
Pension Plan | Total | Asset-backed Securities, Derivatives and Other
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	10	9
Pension Plan | Level 1
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	627	521
Pension Plan | Level 1 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	340	335
Pension Plan | Level 1 | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	32	29
Pension Plan | Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	255	157
Pension Plan | Level 1 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 1 | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 1 | Asset-backed Securities, Derivatives and Other
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 2
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	782	744
Pension Plan | Level 2 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 2 | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 2 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 2 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	646	647
Pension Plan | Level 2 | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	126	88
Pension Plan | Level 2 | Asset-backed Securities, Derivatives and Other
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	10	9
Pension Plan | Investments measured at net asset value
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	$ 1,013	$ 1,062