Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Derivative Assets
Derivative Assets	$ 49	$ 25
Derivative Liabilities
Derivative Liabilities	95	87
Derivatives designated as hedges
Derivative Assets
Derivative Assets	8	10
Derivative Liabilities
Derivative Liabilities	56	62
Foreign exchange contracts | Derivatives designated as hedges | Other current assets
Derivative Assets
Derivative Assets	8	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	23	37
Foreign exchange contracts | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	1	3
Foreign exchange contracts | Derivatives not designated as hedges | Other current assets
Derivative Assets
Derivative Assets	40	15
Foreign exchange contracts | Derivatives not designated as hedges | Other Assets
Derivative Assets
Derivative Assets	1
Foreign exchange contracts | Derivatives not designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	38	25
Foreign exchange contracts | Derivatives not designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	1
Cross currency swap | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	$ 32	$ 22