Effect of Derivative Instruments on Income and Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Cash Flow Hedging Relationship | Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Increase (Decrease) in Gains Recognized in AOCI on Derivative Before Tax Effect (Effective Portion)	$ 275		$ (6)		$ 220		$ (115)
Cash Flow Hedging Relationship | Foreign Exchange Contract | Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains Reclassified from AOCI into Income (Effective Portion)	81		4		119		18
Cash Flow Hedging Relationship | Foreign Exchange Contract | Interest and other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing and Ineffective Portion)	(120)	[1]	(58)	[1]	(246)	[1]	(171)	[1]
Derivatives in Fair Value Hedging Relationship
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivatives	(2)	[2]	(3)	[2]	(5)	[2]	(6)	[2]
Derivatives in Fair Value Hedging Relationship | Foreign Exchange Contract | Interest and other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivatives	36	[2]	(21)	[2]	16	[2]	(59)	[2]
Derivatives in Fair Value Hedging Relationship | Hedged item | Interest and other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivatives	(38)	[2]	18	[2]	(21)	[2]	53	[2]
Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivatives	(7)		(16)		(30)		(9)
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Interest and other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivatives	0		(7)		(25)		0
Derivatives not designated as hedging instruments | Interest rate contract | Interest and other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Income on Derivatives	$ (7)		$ (9)		$ (5)		$ (9)

[1] Gains (losses) related to the ineffective portion of the hedges were not material in all periods presented.

[2] Losses related to the amount excluded from effectiveness testing of the hedges were $3 million and $6 million for the three and six months ended June 30, 2011, and $2 million and $5 million for the three and six months ended June 30, 2012.