Discontinued Operations (Details 3) - TopBuild $ in Millions	Dec. 31, 2014 USD ($)
Carrying amount of major classes of assets and liabilities included as part of discontinued operations
Cash	$ 4
Receivables	220
Inventories	107
Deferred income taxes	38
Prepaid expenses and other	4
Property and equipment, net	93
Goodwill	1,044
Other intangible assets, net	3
Other assets	1
Total assets classified as held for sale	1,514
Accounts payable	229
Accrued liabilities	71
Other liabilities	40
Deferred income taxes	167
Total liabilities classified as held for sale	$ 507