Impact of Derivative Instruments in Consolidated Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Derivative [Line Items]
Derivative Assets	$ 12		$ 9
Derivative Liabilities	20		23
Designated as hedging instrument
Derivative [Line Items]
Derivative Assets	12		7
Derivative Liabilities	16		21
Not designated as hedging instrument
Derivative [Line Items]
Derivative Assets	0		2
Derivative Liabilities	4		2
Not designated as hedging instrument | Embedded derivative
Derivative [Line Items]
Derivative Assets	0		1	[1]
Derivative Liabilities	0		0
Swap | Not designated as hedging instrument | Interest rate swap
Derivative [Line Items]
Derivative Assets	0		0
Derivative Liabilities	0		1	[2]
Forward contracts | Not designated as hedging instrument | Foreign exchange contract
Derivative [Line Items]
Derivative Assets	0		1	[1]
Derivative Liabilities	4	[2]	0
Forward contracts | Not designated as hedging instrument | Energy related derivative
Derivative [Line Items]
Derivative Assets	0		0
Derivative Liabilities	0		1	[2]
Cash flow hedging | Forward contracts | Designated as hedging instrument | Foreign exchange contract
Derivative [Line Items]
Derivative Assets	12	[3]	7	[4]
Derivative Liabilities	$ 16	[5]	$ 21	[6]

[1] Included in Other current assets in the accompanying consolidated balance sheet.

[2] Included in Other accrued liabilities in the accompanying consolidated balance sheet.

[3] Includes $5 million recorded in Other current assets and $7 million recorded in Deferred charges and other assets in the accompanying consolidated balance sheet.

[4] Includes $3 million recorded in Other current assets and $4 million recorded in Deferred charges and other assets in the accompanying consolidated balance sheet.

[5] Includes $11 million recorded in Other accrued liabilities and $5 million recorded in Other liabilities in the accompanying consolidated balance sheet.

[6] Includes $20 million recorded in Other accrued liabilities and $1 million recorded in Other liabilities in the accompanying consolidated balance sheet.