Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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General discussion of the entity's interest rate derivative activities including the duration of the instrument term.

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, and other costs not separately disclosed in the balance sheet that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered.

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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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Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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Summary of Significant Accounting Policies - Inventory, warranty and other (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Aug. 08, 2011	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 30, 2013	Dec. 30, 2011
Inventory [Abstract]
Finished goods		$ 147.4		$ 147.4		$ 134.0
Work-in-process		12.1		12.1		11.4
Raw materials and supplies		72.3		72.3		71.8
Total		231.8		231.8		217.2
Movement in Standard Product Warranty Accrual [Roll Forward]
Accrued expenses		15.3		15.3		16.1
Other non-current liabilities		15.2		15.2		15.2
Revenue Recognition [Abstract]
Allowance for doubtful accounts included in accounts receivable, net		21.2		21.2		$ 19.5
Term of interest rate swap (in years)	4 years
Variable interest rate (as a percent)								1.25%
Senior credit facility balance covered under interest rate swap contracts							$ 150.0	$ 250.0
Redemption value adjustment		(0.1)		$ 0.9
North America \| Pillows
Warranty Term [Abstract]
Warranty term (in years)				3 years
Non-prorated \| International \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				5 years
Prorated \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				10 years
Minimum \| North America \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				10 years
Minimum \| International \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				5 years
Minimum \| Non-prorated \| North America \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				10 years
Maximum \| North America \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				25 years
Maximum \| International \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				15 years
Maximum \| Non-prorated \| North America \| Mattresses
Warranty Term [Abstract]
Warranty term (in years)				15 years
Sales Returns
Sales returns [Roll Forward]
Beginning balance				$ 32.3
Amounts accrued				57.7
Returns charged to accrual				(58.8)
Ending balance		31.2		31.2
Warranty Reserves
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance				31.3
Amounts accrued				15.1
Warranties charged to accrual				(15.9)
Ending balance		$ 30.5		$ 30.5
Comfort Revolution
Revenue Recognition [Abstract]
Equity method investment, ownership percentage		55.00%		55.00%
Redemption Value as Multiplier of Earnings before Interest Taxes, Depreciation and Amortization		7.5		7.5
Period of EBITDA considered for redemption value (in months)				12 months
Income attributable to Comfort Revolution, LLC		$ (0.1)	$ (0.2)	$ 0.5	$ 0.1
Foreign Exchange Forward
Revenue Recognition [Abstract]
Notional amount		$ 105.0		105.0
Gain on derivative				$ 2.5