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Fair Value Measurements (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Jul. 14, 2016 | May 24, 2016 | Dec. 31, 2015 | Sep. 30, 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 | $ 477.0 |  |  | $ 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 | $ 618.0 |  |  | $ 0.0 |
8.0% Sealy Notes |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Stated percentage | 8.00% | 8.00% |  | 8.00% | 8.00%
8.0% Sealy Notes | Fair Value, Inputs, Level 2 |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Notes, fair value | $ 0.0 |  |  | $ 112.7 |

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