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Pension and Other Postretirement Benefits - Schedule of Additional Information About Pension Plan Assets Valued Using Net Asset Value (Details) - Fair Value Measured at Net Asset Value Per Share - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets	$ 45	$ 238
Investment funds – fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets	$ 25	108
Redemption Notice Period	10 days
Investment funds - global equity
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets	$ 20	$ 118
Redemption Notice Period	10 days	10 days
Investment funds - emerging markets
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets		$ 5
Redemption Notice Period		30 days
Investment funds – real estate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets		$ 7
Redemption Notice Period		10 days
Minimum | Investment funds – fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Redemption Notice Period		1 day
Maximum | Investment funds – fixed income
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Redemption Notice Period		5 days

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- Definition

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Notice period the entity is required to deliver before it can redeem an investment calculated using net asset value per share, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, investments calculated by per unit, per membership interest, other equity or ownership interest and alternative investments.

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