Derivative Instruments and Hedging Activities - Fair Value of Derivative Instruments Presented on Gross Basis (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	$ 8	$ 8
Current assets	4	2
Notional Amount
Exchange Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities
Assets, Contracts
Current assets	3
Notional Amount	103	172
Exchange Contracts [Member] | Current assets [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	0
Notional Amount
Exchange Contracts [Member] | Current liabilities [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities		5
Forward Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities
Assets, Contracts
Current assets	1	1
Notional Amount	63	76
Forward Contracts [Member] | Current assets [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	0	1
Notional Amount
Metals Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities
Assets, Contracts
Current liabilities		1
Notional Amount	46	35
Metals Contracts [Member] | Current liabilities [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Current liabilities	8	2
Notional Amount