Fair Value Measurements - Schedule of Pension Plan Assets at Fair Value by Level (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	$ 2,474	$ 2,409	$ 2,465
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	2,474	2,409
Pension Plan | Total
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	1,734	1,671
Pension Plan | Total | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	103	171
Pension Plan | Total | Exchange-Traded Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	37	0
Pension Plan | Total | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	35	32
Pension Plan | Total | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	142	514
Pension Plan | Total | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	728	680
Pension Plan | Total | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	674	260
Pension Plan | Total | Asset-backed Securities, Derivatives and Other
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	15	14
Pension Plan | Level 1
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	317	717
Pension Plan | Level 1 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	103	171
Pension Plan | Level 1 | Exchange-Traded Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	37	0
Pension Plan | Level 1 | Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	35	32
Pension Plan | Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	142	514
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	1,417	954
Pension Plan | Level 2 | Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	0	0
Pension Plan | Level 2 | Exchange-Traded Funds
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	728	680
Pension Plan | Level 2 | Government Securities
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	674	260
Pension Plan | Level 2 | Asset-backed Securities, Derivatives and Other
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	15	14
Pension Plan | Investments measured at net asset value
Defined Benefit Plan Disclosure [Line Items]
Investments at Fair Value	$ 740	$ 738