Pension Plans, Postretirement and Other Employee Benefits - Plan Assets Using Fair Value Hierarchy (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Net plan assets	$ 21	$ 28	$ 0
Non-U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Net plan assets	80	71	9
Pension Plans | U.S.
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	880	837
Net plan assets	1,062	995	202
Pension Plans | U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	238	194
Pension Plans | U.S. | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	18
Pension Plans | U.S. | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	33
Pension Plans | U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	28
Pension Plans | U.S. | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	34	33
Pension Plans | U.S. | Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	817	770
Pension Plans | U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	238	194
Pension Plans | U.S. | Level 1 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	12	12
Pension Plans | U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 1 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	34	33
Pension Plans | U.S. | Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	42	39
Pension Plans | U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	18
Pension Plans | U.S. | Level 2 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	21
Pension Plans | U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 2 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	28
Pension Plans | U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Level 3 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	28
Pension Plans | U.S. | Level 3 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | U.S. | Plan assets measured at net asset value
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	182	158
Pension Plans | U.S. | Plan assets measured at net asset value | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	128	104
Pension Plans | U.S. | Plan assets measured at net asset value | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	54	54
Pension Plans | U.S. | Plan assets measured at net asset value | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	0	0
Pension Plans | Non-U.S.
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	384	341
Net plan assets	523	466	$ 438
Pension Plans | Non-U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	76	69
Pension Plans | Non-U.S. | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	6	8
Pension Plans | Non-U.S. | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	171	149
Pension Plans | Non-U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	13	5
Pension Plans | Non-U.S. | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	80	71
Pension Plans | Non-U.S. | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	14	17
Pension Plans | Non-U.S. | Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	70	64
Pension Plans | Non-U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	18	14
Pension Plans | Non-U.S. | Level 1 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	6	8
Pension Plans | Non-U.S. | Level 1 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	5	2
Pension Plans | Non-U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	3	1
Pension Plans | Non-U.S. | Level 1 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 1 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 1 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	14	17
Pension Plans | Non-U.S. | Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	234	206
Pension Plans | Non-U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	58	55
Pension Plans | Non-U.S. | Level 2 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 2 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	166	147
Pension Plans | Non-U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	10	4
Pension Plans | Non-U.S. | Level 2 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 2 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 2 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	80	71
Pension Plans | Non-U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	80	71
Pension Plans | Non-U.S. | Level 3 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Level 3 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Pension Plans | Non-U.S. | Plan assets measured at net asset value
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	139	125
Pension Plans | Non-U.S. | Plan assets measured at net asset value | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	92	81
Pension Plans | Non-U.S. | Plan assets measured at net asset value | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	14	14
Pension Plans | Non-U.S. | Plan assets measured at net asset value | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Plan assets measured at net asset value	33	30
Registered Investment Company | Pension Plans | U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	337	323
Registered Investment Company | Pension Plans | U.S. | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	158	167
Registered Investment Company | Pension Plans | U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	38	41
Registered Investment Company | Pension Plans | U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	337	323
Registered Investment Company | Pension Plans | U.S. | Level 1 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	158	167
Registered Investment Company | Pension Plans | U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	38	41
Registered Investment Company | Pension Plans | U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | U.S. | Level 2 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | U.S. | Level 3 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1	1
Registered Investment Company | Pension Plans | Non-U.S. | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	23	21
Registered Investment Company | Pension Plans | Non-U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1	1
Registered Investment Company | Pension Plans | Non-U.S. | Level 1 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	23	21
Registered Investment Company | Pension Plans | Non-U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 2 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 3 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	0
Registered Investment Company | Pension Plans | Non-U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	$ 0	$ 0