Pension Plans, Postretirement and Other Employee Benefits - Plan Assets Using Fair Value Hierarchy (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Net plan assets	$ 28	$ 0	$ 0
Non-U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Net plan assets	71	9	9
Pension Plans | U.S.
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	837	23
Plan assets measured at net asset value	158	179
Net plan assets	995	202	192
Pension Plans | U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	194	21
Plan assets measured at net asset value	104	120
Pension Plans | U.S. | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	18	0
Plan assets measured at net asset value	54	59
Pension Plans | U.S. | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	0
Plan assets measured at net asset value	0	0
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	28
Pension Plans | U.S. | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	2
Pension Plans | U.S. | Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	770	23
Pension Plans | U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	194	21
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	0
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
Pension Plans | U.S. | Level 1 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	33	2
Pension Plans | U.S. | Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	39	0
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	18	0
Pension Plans | U.S. | Level 2 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21	0
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
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	28	0
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	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 | Non-U.S.
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	341	295
Plan assets measured at net asset value	125	143
Net plan assets	466	438	$ 369
Pension Plans | Non-U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	69	117
Plan assets measured at net asset value	81	97
Pension Plans | Non-U.S. | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	8	22
Plan assets measured at net asset value	14	14
Pension Plans | Non-U.S. | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	149	114
Plan assets measured at net asset value	30	32
Pension Plans | Non-U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	5	7
Pension Plans | Non-U.S. | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	71	25
Pension Plans | Non-U.S. | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Pension Plans | Non-U.S. | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	17	10
Pension Plans | Non-U.S. | Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	64	34
Pension Plans | Non-U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	14	16
Pension Plans | Non-U.S. | Level 1 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	8	6
Pension Plans | Non-U.S. | Level 1 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	2	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	1	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
Pension Plans | Non-U.S. | Level 1 | Cash and equivalents
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	17	9
Pension Plans | Non-U.S. | Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	206	252
Pension Plans | Non-U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	55	101
Pension Plans | Non-U.S. | Level 2 | Corporate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	16
Pension Plans | Non-U.S. | Level 2 | Government
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	147	112
Pension Plans | Non-U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	4	6
Pension Plans | Non-U.S. | Level 2 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0	16
Pension Plans | Non-U.S. | Level 2 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	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	1
Pension Plans | Non-U.S. | Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	71	9
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	71	9
Pension Plans | Non-U.S. | Level 3 | Hedge funds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	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
Registered Investment Company [Member] | Pension Plans | U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	323
Registered Investment Company [Member] | Pension Plans | U.S. | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	167
Registered Investment Company [Member] | Pension Plans | U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	41
Registered Investment Company [Member] | Pension Plans | U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	323
Registered Investment Company [Member] | Pension Plans | U.S. | Level 1 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	167
Registered Investment Company [Member] | Pension Plans | U.S. | Level 1 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	41
Registered Investment Company [Member] | Pension Plans | U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 2 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 2 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 3 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | U.S. | Level 3 | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Real Estate and other
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 1 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	1
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 1 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	21
Registered Investment Company [Member] | 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
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 2 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 2 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | 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
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 3 | Equity securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | Pension Plans | Non-U.S. | Level 3 | Fixed income securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Allocated plan assets	0
Registered Investment Company [Member] | 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