Pensions and Other Post-Retirement Benefits - Total Accumulated Benefit Obligation and Minimum Liability Changes For Pension Plans (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Accumulated benefit obligation	$ 1,078	$ 1,579	$ 1,750
Accumulated Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	888	1,490
Accumulated benefit obligation	874	1,473
Fair value of plan assets	668	1,272
Projected Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	943	1,490
Accumulated benefit obligation	1,078	1,579
Fair value of plan assets	723	1,272
The Netherlands | Accumulated Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	83	646
Accumulated benefit obligation	83	644
Fair value of plan assets	75	637
The Netherlands | Projected Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	83	646
Accumulated benefit obligation	83	644
Fair value of plan assets	75	637
Other | Accumulated Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	428	506
Accumulated benefit obligation	414	491
Fair value of plan assets	323	404
Other | Projected Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	483	506
Accumulated benefit obligation	618	597
Fair value of plan assets	378	404
United States | Accumulated Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	377	338
Accumulated benefit obligation	377	338
Fair value of plan assets	270	231
United States | Projected Benefit Obligation
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Projected benefit obligation	377	338
Accumulated benefit obligation	377	338
Fair value of plan assets	$ 270	$ 231