Plan Assets Using Fair Value Hierarchy (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 726
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	43	41
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 1 | U.S. large cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	41	41
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 1 | Cash held in bank accounts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2	0
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	291	306
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2 | U.S. large cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	134	143
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2 | U.S. Small Cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	25	27
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2 | Non-U.S. mid cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	24	27
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2 | Emerging Markets
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	8	8
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2 | U.S. corporate bonds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	5	5
United States Pension Plans of US Entity, Defined Benefits | Fair Value, Inputs, Level 2 | U.S. other fixed income
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	95	96
Foreign | Fair Value, Inputs, Level 1
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	180	175
Foreign | Fair Value, Inputs, Level 1 | U.S. large cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	31	31
Foreign | Fair Value, Inputs, Level 1 | U.S. mid cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4	4
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. large cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	57	57
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. mid cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	20	20
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. small cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1	1
Foreign | Fair Value, Inputs, Level 1 | Emerging Markets
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. treasuries/government bonds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	41	35
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. corporate bonds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	20	18
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. municipal obligations
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1	1
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. other fixed income
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1	1
Foreign | Fair Value, Inputs, Level 1 | Non-U.S. real estate
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	1
Foreign | Fair Value, Inputs, Level 1 | Cash held in bank accounts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4	6
Foreign | Fair Value, Inputs, Level 2
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	203	196
Foreign | Fair Value, Inputs, Level 2 | U.S. large cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	25	21
Foreign | Fair Value, Inputs, Level 2 | U.S. mid cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	5	4
Foreign | Fair Value, Inputs, Level 2 | U.S. Small Cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		0
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. large cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	68	71
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. mid cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	16	19
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. small cap
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6	7
Foreign | Fair Value, Inputs, Level 2 | Emerging Markets
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3	4
Foreign | Fair Value, Inputs, Level 2 | U.S. corporate bonds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	5	4
Foreign | Fair Value, Inputs, Level 2 | U.S. other fixed income
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		0
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. treasuries/government bonds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	27	25
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. corporate bonds
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	27	18
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. mortgage backed securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2	4
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. asset backed securities
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	3
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. other fixed income
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	2
Foreign | Fair Value, Inputs, Level 2 | Non-U.S. real estate
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6	5
Foreign | Fair Value, Inputs, Level 2 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	13	9
Foreign | Fair Value, Inputs, Level 3
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9	8
Foreign | Fair Value, Inputs, Level 3 | Insurance contracts
Schedule of Defined Benefit Plan Asset Allocation Targets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 9	$ 8