Business Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Segment	Mar. 31, 2012	Dec. 31, 2012
Business Segment Information [Abstract]
Number of business segments	3
Total assets [Abstract]
Total Assets	$ 2,826.9		$ 1,313.0
Investments in subsidiaries	(1,534.0)		(347.6)
Long-lived assets by segment	1,968.8		465.2
Net sales	390.1	384.4
Net sales international	136.8	125.4
Segment information [Abstract]
Net Sales from external Customers	390.1	384.4
Inter Segment Sales	0	0
Gross Profit	188.4	206.0
Operating income	44.3	86.1
Income before income taxes	14.9	81.5
Depreciation and amortization (including stock-based compensation amortization)	14.7	13.1
Intercompany royalties	0	0
Capital expenditures	5.6	6.6
United States [Member]
Total assets [Abstract]
Net sales	253.3	259.0
Segment information [Abstract]
Net Sales from external Customers	253.3	259.0
Canada [Member]
Total assets [Abstract]
Net sales	15.0	10.0
Segment information [Abstract]
Net Sales from external Customers	15.0	10.0
Other International [Member]
Total assets [Abstract]
Net sales	121.8	115.4
Segment information [Abstract]
Net Sales from external Customers	121.8	115.4
North America [Member]
Segment Reporting Information [Line Items]
Number of domestic manufacturing facilities	2
Operating expenses	29.3	14.3
Total assets [Abstract]
Total Assets	2,168.3		1,160.4
Long-lived assets by segment	393.1		395.7
Net sales	225.9	269.0
Segment information [Abstract]
Net Sales from external Customers	225.9	269.0
Inter Segment Sales	0.1	0.2
Gross Profit	103.5	137.2
Operating income	15.9	58.5
Income before income taxes	(11.7)	54.5
Depreciation and amortization (including stock-based compensation amortization)	9.8	10.5
Intercompany royalties	1.3	3.5
Capital expenditures	3.9	3.6
North America [Member] | Bedding [Member]
Total assets [Abstract]
Net sales	204.6	244.5
Segment information [Abstract]
Net Sales from external Customers	204.6	244.5
North America [Member] | Other Products [Member]
Total assets [Abstract]
Net sales	21.3	24.5
Segment information [Abstract]
Net Sales from external Customers	21.3	24.5
International [Member]
Total assets [Abstract]
Total Assets	539.3		504.1
Long-lived assets by segment	66.5		69.5
Net sales	117.5	115.4
Segment information [Abstract]
Net Sales from external Customers	117.5	115.4
Inter Segment Sales	0.1	0
Gross Profit	74.2	68.8
Operating income	31.3	27.6
Income before income taxes	30.3	27.0
Depreciation and amortization (including stock-based compensation amortization)	3.1	2.6
Intercompany royalties	(1.3)	(3.5)
Capital expenditures	1.7	3.0
International [Member] | Bedding [Member]
Total assets [Abstract]
Net sales	89.3	89.2
Segment information [Abstract]
Net Sales from external Customers	89.3	89.2
International [Member] | Other Products [Member]
Total assets [Abstract]
Net sales	28.2	26.2
Segment information [Abstract]
Net Sales from external Customers	28.2	26.2
Intersegment Elimination [Member]
Total assets [Abstract]
Total Assets	310.7		3.9
Long-lived assets by segment	1,509.2
Segment information [Abstract]
Inter Segment Sales	(0.2)	(0.2)
Sealy [Member]
Total assets [Abstract]
Total Assets	1,964.0		0
Long-lived assets by segment			0
Net sales	46.7	0
Segment information [Abstract]
Net Sales from external Customers	46.7	0
Inter Segment Sales	0	0
Gross Profit	10.7	0
Operating income	(2.9)	0
Income before income taxes	(3.7)	0
Depreciation and amortization (including stock-based compensation amortization)	1.8	0
Intercompany royalties	0	0
Capital expenditures	0	0
Sealy [Member] | Bedding [Member]
Total assets [Abstract]
Net sales	44.7	0
Segment information [Abstract]
Net Sales from external Customers	44.7	0
Sealy [Member] | Other Products [Member]
Total assets [Abstract]
Net sales	2.0	0
Segment information [Abstract]
Net Sales from external Customers	$ 2.0	$ 0