Derivative Instruments and Hedging Activities - Effect of Derivative Instruments Designated as Fair Value Hedges and Not Designated as Hedges on Consolidated Statement of Income (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value Hedging | Interest rate swaps | Interest expense
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ 15	$ 1	$ 9
Derivative not designated as hedges
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	(2)	6	(22)
Derivative not designated as hedges | Foreign exchange contracts | Cost of revenue
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	(2)	5	(17)
Derivative not designated as hedges | Commodity contracts | Cost of revenue
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income		$ 1	$ (5)