Employee Benefit Plans - Accumulated Benefit Obligation For Pension Benefit Plans (Detail) - Pension Benefits [Member] - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
---|---|---|
United States [Member] | ||
Defined Contribution And Defined Benefit Plans [Line Items] | ||
Accumulated benefit obligation | $ 330 | $ 343 |
Non-United States Plans [Member] | ||
Defined Contribution And Defined Benefit Plans [Line Items] | ||
Accumulated benefit obligation | $ 476 | $ 507 |