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Acquisitions and Divestitures - Additional Information (Details) - Tempur North America - USD ($) $ in Millions | Oct. 03, 2016 | Dec. 31, 2017 | Dec. 31, 2016
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Business Acquisition [Line Items] |  |  |
Ownership percentage by parent | 51.00% |  | 51.00%
Ownership percentage by noncontrolling owners |  | 49.00% | 49.00%
Net consideration transferred | $ 7.7 |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 49.00% |

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