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-- None. No documentation exists for this element. --

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Write off of Marketing Assets, Severance Costs, and Professional Fees

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Summary of Significant Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) channel	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Valuation and Qualifying Accounts Disclosure [Line Items]
Number of products sales channels \| channel	2
Ownership percentage	50.00%
Net investment	$ 25.0		$ 21.5
Revenue Recognition [Abstract]
Allowance for doubtful accounts included in accounts receivable, net	28.2		27.4
Tax benefit recognized		$ 9.3
Revenues	648.0	722.1
Mattress Firm
Revenue Recognition [Abstract]
Restructuring charges		25.9
Tax benefit recognized		9.3
Revenues		9.3
Mattress Firm \| Cost of Sales
Revenue Recognition [Abstract]
Restructuring charges		11.5
Write-off of inventory		5.4
Warranty costs		6.1
Mattress Firm \| Customer Termination Charges, Net
Revenue Recognition [Abstract]
Restructuring charges		14.4
Write off of incentives and marketing assets, employee-related costs, and professional fees		22.8
Accelerated amortization		$ 0.9
Accounts Payable and Accrued Liabilities
Warranty Term [Abstract]
Accrued warranty expense	16.9		16.7
Other Noncurrent Liabilities
Warranty Term [Abstract]
Accrued warranty expense	$ 21.7		$ 20.0
Mattresses \| Non-prorated \| International
Warranty Term [Abstract]
Warranty term (in years)	5 years
Mattresses \| Prorated \| International
Warranty Term [Abstract]
Warranty term (in years)	10 years
Mattresses \| Minimum \| North America
Warranty Term [Abstract]
Warranty term (in years)	10 years
Mattresses \| Minimum \| International
Warranty Term [Abstract]
Warranty term (in years)	5 years
Mattresses \| Minimum \| Non-prorated \| North America
Warranty Term [Abstract]
Warranty term (in years)	10 years
Mattresses \| Maximum \| North America
Warranty Term [Abstract]
Warranty term (in years)	25 years
Mattresses \| Maximum \| International
Warranty Term [Abstract]
Warranty term (in years)	15 years
Mattresses \| Maximum \| Non-prorated \| North America
Warranty Term [Abstract]
Warranty term (in years)	15 years
Pillows \| North America
Warranty Term [Abstract]
Warranty term (in years)	3 years
Comfort Revolution
Valuation and Qualifying Accounts Disclosure [Line Items]
Equity method investment, ownership percentage	45.00%