Income Taxes (Unrecognized Tax Benefits) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Undistributed Earnings of Foreign Subsidiaries	$ 5,000	$ 5,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	71	85	$ 82
Additions based on tax positions related to the current year	14	12	12
Additions for tax positions of prior years	5	3	9
Pre-acquisition unrecognized tax benefits	4	0	0
Reductions for tax positions of prior years	(3)	(15)	(10)
Reductions for expiration of the applicable statute of limitations	(1)	(2)	(10)
Settlements	(3)	(6)	0
Foreign currency translation	(5)	(6)	2
Ending balance	$ 82	$ 71	$ 85