Impairment Charges (Components of Fair Values In Relation to Their Respective Carrying Values) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) reporting_unit	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) reporting_unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 1,406.3	$ 833.8
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow	3.00%	3.00%
Number of reporting units tested for goodwill impairment | reporting_unit			2
Goodwill	$ 1,406.3	$ 833.8	$ 822.2
Less than 50%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 59.4
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow	3.00%
Less than 100%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill		$ 180.7
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow		3.00%
50% - 100%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 722.9
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow	3.00%
101% - 300%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 400.9	$ 502.5
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow	3.00%	3.00%
301% - 600%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 223.1	$ 150.6
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow	3.00%	3.00%
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
10-year Compound Annual Growth Rate Range for Sales	0.20%	1.80%
Discount Rate Ranges	7.50%	8.50%
Minimum | Less than 50%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
10-year Compound Annual Growth Rate Range for Sales	1.40%
Discount Rate Ranges	8.00%
Minimum | Less than 100%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
10-year Compound Annual Growth Rate Range for Sales		4.70%
Discount Rate Ranges		9.00%
Minimum | 50% - 100%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	50.00%
Minimum | 101% - 300%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	101.00%	101.00%
10-year Compound Annual Growth Rate Range for Sales	1.30%	1.80%
Discount Rate Ranges	7.50%	8.50%
Minimum | 301% - 600%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	301.00%	301.00%
10-year Compound Annual Growth Rate Range for Sales	0.20%	5.70%
Discount Rate Ranges		9.00%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
10-year Compound Annual Growth Rate Range for Sales	11.10%	12.40%
Discount Rate Ranges	9.50%	10.00%
Maximum | Less than 50%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	50.00%
10-year Compound Annual Growth Rate Range for Sales	5.80%
Discount Rate Ranges	9.50%
Maximum | Less than 100%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)		100.00%
10-year Compound Annual Growth Rate Range for Sales		5.20%
Discount Rate Ranges		9.50%
Maximum | 50% - 100%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	100.00%
10-year Compound Annual Growth Rate Range for Sales	5.00%
Discount Rate Ranges	8.50%
Maximum | 101% - 300%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	300.00%	300.00%
10-year Compound Annual Growth Rate Range for Sales	5.50%	5.00%
Discount Rate Ranges	8.00%	10.00%
Maximum | 301% - 600%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value over Carrying Value divided by Carrying Value (as a percent)	600.00%	600.00%
10-year Compound Annual Growth Rate Range for Sales	11.10%	12.40%
Discount Rate Ranges	8.50%	10.00%
Furniture Products
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 193.0	$ 193.1	$ 196.2
Machinery and Hydraulic Cylinders reporting units
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of reporting units tested for goodwill impairment | reporting_unit	2
Machinery reporting unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair values of reporting units in excess of carrying amount (as a percent) (at least)	12.00%
Goodwill	$ 33.4
Bedding reporting unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of reporting units tested for goodwill impairment | reporting_unit	1
Fair values of reporting units in excess of carrying amount (as a percent) (at least)	50.00%	198.00%
Hydraulic Cylinders reporting unit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair values of reporting units in excess of carrying amount (as a percent) (at least)	29.00%	90.00%
Goodwill	$ 26.0