Reconciliation of U.S Federal Income Tax Statutory Rate and Effective Income Tax Rate (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 1	$ 2	$ 0
Changes in valuation allowances	(0.60%)	(3.00%)	15.50%
U.S. federal statutory rate	35.00%	35.00%	35.00%
State and local income taxes, net of federal tax benefits	2.80%	3.30%	4.10%
Taxes on foreign operations at rates different than statutory U.S. federal rates	3.70%	1.40%	5.90%
Resolution of prior years' examination issues	(25.60%)	0.00%	0.00%
Non-deductible debt extinguishment costs	0.00%	0.00%	18.80%
Non-deductible transaction-related costs	0.90%	0.00%	3.20%
Other non-deductible expenses	1.80%	0.90%	2.30%
Other	0.10%	(0.10%)	(1.30%)
Effective Income Tax Rate, Continuing Operations, Total	18.10%	37.50%	83.50%
Other Tax [Member]
Income Tax Disclosure [Line Items]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 98
Changes in valuation allowances			13.10%