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Fair Value Measurements (Details) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
2020 Senior Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated percentage 6.875% 6.875%
2020 Senior Notes | Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Notes, fair value $ 395.2 $ 393.8
2023 Senior Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated percentage 5.625% 5.625%
2023 Senior Notes | Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Notes, fair value $ 462.9 $ 0.0
Sealy notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Stated percentage 8.00% 8.00%
Sealy notes | Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Notes, fair value $ 113.8 $ 0.0