Discontinued Operations - Income Statement Line Items (Details) - Spinoff - TopBuild - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Pre-tax profit (Loss) of discontinued operations
Net sales	$ 0	$ 0	$ 0	$ 762
Cost of sales	0	0	0	603
Gross profit	0	0	0	159
Selling, general and administrative expenses	0	0	0	148
Income from discontinued operations	0	0	0	11
Loss on disposal of discontinued operations, net	0	(1)	0	(1)
(Loss) income before income tax	0	(1)	0	10
Income tax benefit (expense)	0	1	0	(11)
Loss from discontinued operations, net	$ 0	$ 0	$ 0	$ (1)