Impact of Derivative Instruments in Consolidated Balance Sheet (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Derivative [Line Items]
Derivative Liabilities	$ 47		$ 68
Designated as Hedging Instrument
Derivative [Line Items]
Derivative Liabilities	42		63
Designated as Hedging Instrument | Foreign Exchange Contract | Cash Flow Hedging
Derivative [Line Items]
Derivative Liabilities	42	[1]	53	[2]
Other Accrued Liabilities | Designated as Hedging Instrument | Foreign Exchange Contract | Cash Flow Hedging
Derivative [Line Items]
Derivative Liabilities	31		32
Other Liabilities | Designated as Hedging Instrument | Foreign Exchange Contract | Cash Flow Hedging
Derivative [Line Items]
Derivative Liabilities	$ 11		$ 21

[1] Includes $31 million recorded in Other accrued liabilities and $11 million recorded in Other liabilities in the accompanying consolidated balance sheet.

[2] Includes $32 million recorded in Other accrued liabilities and $21 million recorded in Other liabilities in the accompanying consolidated balance sheet.