Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended														6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Foreign exchange contracts	Jun. 30, 2013 Foreign exchange contracts	Jun. 30, 2014 Foreign exchange contracts	Jun. 30, 2013 Foreign exchange contracts	Jun. 30, 2014 Derivatives designated as hedges	Dec. 31, 2013 Derivatives designated as hedges	Jun. 30, 2014 Derivatives designated as hedges Foreign exchange contracts Other current assets	Dec. 31, 2013 Derivatives designated as hedges Foreign exchange contracts Other current assets	Jun. 30, 2014 Derivatives designated as hedges Foreign exchange contracts Other Assets	Dec. 31, 2013 Derivatives designated as hedges Foreign exchange contracts Other Assets	Jun. 30, 2014 Derivatives designated as hedges Foreign exchange contracts Accounts payable and accrued liabilities	Dec. 31, 2013 Derivatives designated as hedges Foreign exchange contracts Accounts payable and accrued liabilities	Jun. 30, 2014 Derivatives designated as hedges Foreign exchange contracts Other Liabilities	Dec. 31, 2013 Derivatives designated as hedges Foreign exchange contracts Other Liabilities	Jun. 30, 2014 Derivatives designated as hedges Interest rate swaps Other Assets	Dec. 31, 2013 Derivatives designated as hedges Interest rate swaps Other Assets	Jun. 30, 2014 Derivatives not designated as hedges	Dec. 31, 2013 Derivatives not designated as hedges	Jun. 30, 2014 Derivatives not designated as hedges Foreign exchange contracts Other current assets	Dec. 31, 2013 Derivatives not designated as hedges Foreign exchange contracts Other current assets	Jun. 30, 2014 Derivatives not designated as hedges Foreign exchange contracts Other Assets	Dec. 31, 2013 Derivatives not designated as hedges Foreign exchange contracts Other Assets	Jun. 30, 2014 Derivatives not designated as hedges Foreign exchange contracts Accounts payable and accrued liabilities	Dec. 31, 2013 Derivatives not designated as hedges Foreign exchange contracts Accounts payable and accrued liabilities
Derivative Assets
Derivative Assets							$ 51	$ 149	$ 17	$ 98	$ 11	$ 24					$ 23	$ 27
Derivative Assets	59	163	(9)	34	(6)	(45)													8	14	5	10	3	4
Derivative Liabilities
Derivative Liabilities							$ 7	$ 15					$ 6	$ 14	$ 1	$ 1			$ 17	$ 17					$ 10	$ 2