Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivative Assets
Derivative Assets	$ 25	$ 40
Derivatives designated as hedges
Derivative Assets
Derivative Assets	10	35
Derivative Liabilities
Derivative Liabilities	62	227
Derivatives not designated as hedges
Derivative Liabilities
Derivative Liabilities	87	255
Foreign exchange contracts | Derivatives designated as hedges | Other current assets
Derivative Assets
Derivative Assets	4	3
Foreign exchange contracts | Derivatives designated as hedges | Other Assets
Derivative Assets
Derivative Assets	6	32
Foreign exchange contracts | Derivatives designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	37	80
Foreign exchange contracts | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	3	105
Foreign exchange contracts | Derivatives not designated as hedges | Other current assets
Derivative Assets
Derivative Assets	15	5
Foreign exchange contracts | Derivatives not designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	25	28
Cross currency swap | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	$ 22	$ 42