Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Derivative Assets
Derivative Assets	$ 74	$ 163
Derivatives designated as hedges
Derivative Assets
Derivative Assets	66	149
Derivative Liabilities
Derivative Liabilities	8	15
Derivatives designated as hedges | Foreign exchange contracts | Other current assets
Derivative Assets
Derivative Assets	22	98
Derivatives designated as hedges | Foreign exchange contracts | Other Assets
Derivative Assets
Derivative Assets	24	24
Derivatives designated as hedges | Foreign exchange contracts | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	7	14
Derivatives designated as hedges | Foreign exchange contracts | Other Liabilities
Derivative Liabilities
Derivative Liabilities	1	1
Derivatives designated as hedges | Interest rate swaps | Other Assets
Derivative Assets
Derivative Assets	20	27
Derivatives not designated as hedges
Derivative Assets
Derivative Assets	8	14
Derivative Liabilities
Derivative Liabilities	19	17
Derivatives not designated as hedges | Foreign exchange contracts | Other current assets
Derivative Assets
Derivative Assets	4	10
Derivatives not designated as hedges | Foreign exchange contracts | Other Assets
Derivative Assets
Derivative Assets	4	4
Derivatives not designated as hedges | Foreign exchange contracts | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	$ 11	$ 2