Retirement Plans - Schedule of Net Periodic Pension Cost and Other Comprehensive Income (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Retirement Benefits [Abstract] | |||
| Interest cost | $ 6 | $ 7 | $ 6 |
| Expected return on plan assets | (11) | (11) | (9) |
| Actuarial loss amortization | 2 | 2 | 2 |
| Total pension income | (3) | (2) | (1) |
| Current year actuarial loss | 6 | 3 | 2 |
| Amortization of actuarial loss | (2) | (2) | (2) |
| Total amount recognized in other comprehensive income | 4 | 1 | 0 |
| Total amount recognized in net periodic benefit cost and other comprehensive income | $ 1 | $ (1) | $ (1) |
| X | ||||||||||
- Definition Amount relating to the defined benefit plan recognized in net periodic pension cost (credit) and other comprehensive income. No definition available.
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| X | ||||||||||
- Definition Amount before tax of actuarial loss (credit) of charges attributable to actuarial valuations that has not been recognized in net periodic benefit cost (credit). No definition available.
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| X | ||||||||||
- Definition Amount before tax of amortization of actuarial loss that has not been recognized in net periodic benefit cost (credit). No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, before tax, after reclassification adjustment, of increase (decrease) in accumulated other comprehensive income from gain (loss) of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits. No definition available.
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