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Fair Value Measurements (Details) - USD ($)
$ in Millions
Jun. 30, 2016
May 24, 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 $ 0.0   $ 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 $ 463.5   $ 453.4
2026 Senior Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Stated percentage 5.50% 5.50%  
2026 Senior Notes | Fair Value, Inputs, Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Notes, fair value $ 588.8   $ 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 $ 115.0   $ 112.7