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Discontinued Operations (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015
Selected financial information of discontinued operations |  |  |
Issuance of TopBuild Corp. debt |  |  | $ 200
TopBuild |  |  |
Selected financial information of discontinued operations |  |  |
Issuance of TopBuild Corp. debt | $ 200 |  |
TopBuild | Installation and Other Services |  |  |
Selected financial information of discontinued operations |  |  |
Percentage of businesses planned for spinoff |  | 100.00% |

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