Basis Of Presentation And Summary Of Significant Accounting Policies - Proceeds from Factoring of Accounts Receivable Qualifying as Sales and Expenses Associated with Factoring of Accounts Receivable (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accounting Policies [Abstract]
Proceeds from factoring qualifying as sales	$ 429	$ 410	$ 842	$ 800
Expenses associated with factoring of receivables	$ (4)	$ (2)	$ (7)	$ (4)