Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 09, 2014
Income Taxes [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		40.85%
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority			$ 121
Income Tax Examination, Tax Expense	$ (12)