Employee Benefit Plans - (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan
Employee waiting period after hire to participate in the defined contribution plans	90 days
Employee maximum contribution towards defined contribution plans as percentage of annual compensation	50.00%
Employee maximum contribution towards defined contribution plans as percentage of annual incentive plan bonus	80.00%
Percentage of contribution upon eligibility for non union employees hired after threshold period	3.00%
Employer's match in cash of non-union employee contributions on first specified percentage of eligible compensation	100.00%
First percentage of eligible compensation on which specified percentage of non-union employee contribution is matched by the employer in cash	3.00%
Employer's match in cash of non-union employee contributions on next specified percentage of eligible compensation	50.00%
Next percentage of eligible compensation on which specified percentage of non-union employee contribution is matched by the employer in cash	3.00%
Employer maximum match of non-union employee contribution on eligible compensation	4.50%
Defined contribution plans expense	$ 125	$ 118	$ 112
Pension Plans [Member]
Defined Benefit Plan
Combined accumulated benefit obligation of pension plans	115	119
Plan assets of pension plans	117	118
Aggregate plan asset	2
Unfunded benefit obligation		1
Other Postretirement Plans [Member]
Defined Benefit Plan
Unfunded benefit obligation	$ 7	$ 7

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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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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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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Amount of cost for defined contribution plan.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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Employee maximum contribution towards defined contribution plans as percentage of annual incentive plan

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Employees Minimum Employment Period For Employer Contribution Eligibility

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Employer's match in cash of non-union employee contributions on first specified percentage of eligible compensation.

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Employer's match in cash of non-union employee contributions on next specified percentage of eligible compensation.

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First percentage of eligible compensation on which specified percentage of non-union employee contribution is matched by the employer in cash.

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Next percentage of eligible compensation on which specified percentage of non-union employee contribution is matched by the employer in cash.

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Represents the percentage of contribution upon eligibility for non union employees hired after a threshold period.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan net of combined benefit obligations.

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