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Acquisitions and Divestitures - Additional Information (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2020 | Apr. 01, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |
Payments to acquire business |  |  | $ 41.2 | $ 17.1 | $ 0.0
Innovative Mattress Solutions, LLC (IMS) |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Transaction value |  | $ 24.0 |  |  |
Liabilities assumed |  | 11.0 |  |  |
Consideration transferred |  | 13.2 |  |  |
Cash and equivalents |  | 5.1 |  |  |
Sherwood Bedding |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Consideration transferred | $ 39.1 |  |  |  |
Voting interest acquired | 80.00% |  |  |  |
Cash acquired | $ 1.2 |  |  |  |
Trade Name and Customer Database | Innovative Mattress Solutions, LLC (IMS) |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets acquired |  | $ 2.1 |  |  |

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