Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Derivative Assets
Derivative Assets	$ 67	$ 25
Derivatives designated as hedges
Derivative Assets
Derivative Assets	15	10
Derivative Liabilities
Derivative Liabilities	81	62
Derivatives not designated as hedges
Derivative Liabilities
Derivative Liabilities	178	87
Foreign exchange contracts | Derivatives designated as hedges | Other current assets
Derivative Assets
Derivative Assets	15	4
Foreign exchange contracts | Derivatives designated as hedges | Other Assets
Derivative Assets
Derivative Assets		6
Foreign exchange contracts | Derivatives designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	44	37
Foreign exchange contracts | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	2	3
Foreign exchange contracts | Derivatives not designated as hedges | Other current assets
Derivative Assets
Derivative Assets	50	15
Foreign exchange contracts | Derivatives not designated as hedges | Other Assets
Derivative Assets
Derivative Assets	2
Foreign exchange contracts | Derivatives not designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	95	25
Foreign exchange contracts | Derivatives not designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	2
Cross currency swap | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	$ 35	$ 22