Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Derivative Assets
Derivative Assets	$ 23	$ 43
Derivative Liabilities
Derivative Liabilities	59	126
Derivatives designated as hedges
Derivative Liabilities
Derivative Liabilities	31	67
Foreign exchange contracts \| Derivatives designated as hedges \| Other current assets
Derivative Assets
Derivative Assets	5	1
Foreign exchange contracts \| Derivatives designated as hedges \| Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	3	18
Foreign exchange contracts \| Derivatives not designated as hedges \| Other current assets
Derivative Assets
Derivative Assets	18	42
Foreign exchange contracts \| Derivatives not designated as hedges \| Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	28	59
Cross currency swap \| Derivatives designated as hedges \| Other Liabilities
Derivative Liabilities
Derivative Liabilities	$ 28	$ 49