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
	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Proceeds from factoring qualifying as sales	$ 413	$ 390
Expenses associated with factoring of receivables	$ (3)	$ (2)