Major Component of Discontinued Operations, Net of Tax (Detail) - Discontinued Operations, Held-for-Sale $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	$ 94
Cost of goods sold and occupancy costs	72
Operating expenses	17
Other expense, net	(2)
Net increase of loss on discontinued operations held for sale	(1)
Net loss on sale of discontinued operations	(1)
Income tax benefit	(7)
Discontinued operations, net of tax	$ 8