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Debt (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Jul. 14, 2016 | May 24, 2016
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Total debt | $ 1,696,000,000 |  |  | $ 1,696,000,000 |  | $ 1,479,600,000 |  |
Less: deferred financing costs | (10,900,000) |  |  | (10,900,000) |  | (24,800,000) |  |
Total debt, net | 1,685,100,000 |  |  | 1,685,100,000 |  | 1,454,800,000 |  |
Less: current portion | (66,100,000) |  |  | (66,100,000) |  | (181,500,000) |  |
Total long-term debt, net | 1,619,000,000 |  |  | 1,619,000,000 |  | 1,273,300,000 |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Maximum borrowing capacity | 350,000,000.0 |  |  | 350,000,000.0 |  |  |  |
Loss on extinguishment of debt | 0 |  | $ 0 | 47,200,000 | $ 0 |  |  |
Write off of deferred financing costs | 11,000,000 |  |  |  |  |  |  |
2026 Senior Notes |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Senior notes | $ 600,000,000 |  |  | $ 600,000,000 |  | 0 |  | $ 600,000,000
Less: deferred financing costs |  | $ (3,100,000) |  |  |  |  |  |
Stated percentage | 5.50% |  |  | 5.50% |  |  |  | 5.50%
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Debt instrument, amortization period, deferred financing costs (in years) |  | 10 years |  |  |  |  |  |
Loss on extinguishment of debt |  | $ 5,900,000 |  |  |  |  |  |
2023 Senior Notes |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Senior notes | $ 450,000,000.0 |  |  | $ 450,000,000.0 |  | $ 450,000,000 |  |
Stated percentage | 5.625% |  |  | 5.625% |  | 5.625% |  |
2020 Senior Notes |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Senior notes | $ 0 |  |  | $ 0 |  | $ 375,000,000.0 |  | $ 375,000,000
Stated percentage |  |  |  |  |  | 6.875% |  | 6.875%
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  | 23,600,000 |  |  |  |  |  |
Write off of deferred financing costs |  | 4,800,000 |  |  |  |  |  |
Sealy notes |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
8.0% Sealy Notes | $ 0 |  |  | $ 0 |  | $ 111,100,000 |  |
Stated percentage | 8.00% |  | 8.00% | 8.00% | 8.00% | 8.00% | 8.00% |
Capital lease obligations and other |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Capital lease obligations and other | $ 53,500,000 |  |  | $ 53,500,000 |  | $ 34,000,000 |  |
2016 Credit Agreement |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Less: deferred financing costs |  | $ (3,600,000) |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Debt instrument, amortization period, deferred financing costs (in years) |  | 5 years |  |  |  |  |  |
Loss on extinguishment of debt |  | $ 1,900,000 |  |  |  |  |  |
2016 Credit Agreement | Term A Facility |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Line of credit | 592,500,000 |  |  | $ 592,500,000 |  | 0 |  |
2016 Credit Agreement | Term A Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Index rate or LIBOR plus (as a percent) |  |  |  | 1.50% |  |  |  |
2012 Credit Agreement | Term A Facility |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Line of credit | 0 |  |  | $ 0 |  | $ 409,400,000 |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Maximum borrowing capacity | 550,000,000.0 |  |  | 550,000,000.0 |  |  |  |
2012 Credit Agreement | Term A Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Index rate or LIBOR plus (as a percent) |  |  |  |  |  | 2.00% |  |
2012 Credit Agreement | Term B Facility |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Line of credit | 0 |  |  | 0 |  | $ 100,100,000 |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Maximum borrowing capacity | 870,000,000.0 |  |  | 870,000,000.0 |  |  |  |
2012 Credit Agreement | Term B Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Index rate or LIBOR plus (as a percent) |  |  |  |  |  | 2.75% |  |
Interest rate floor (as a percent) |  |  |  |  |  | 0.75% |  |
Line of Credit | 2016 Credit Agreement |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Maximum borrowing capacity | 500,000,000.0 |  |  | 500,000,000.0 |  |  |  |
Line of credit facility, incremental amount available | 500,000,000 |  |  | 500,000,000 |  |  |  |
Maximum borrowing capacity available in other currencies | 250,000,000.0 |  |  | 250,000,000.0 |  |  |  |
Line of credit facility, capacity available for issuance of letters of credit | 100,000,000 |  |  | 100,000,000 |  |  |  |
Line of credit facility, capacity available for swing line loans | $ 50,000,000.0 |  |  | $ 50,000,000.0 |  |  |  |
Equity interest of subsidiary guarantor (as a percent) | 100.00% |  |  | 100.00% |  |  |  |
Equity voting rights of subsidiary (as a percent) | 65.00% |  |  | 65.00% |  |  |  |
Domestic qualified cash excluded (in hundredths) | 100.00% |  |  | 100.00% |  |  |  |
Foreign qualified cash excluded (in hundredths) | 60.00% |  |  | 60.00% |  |  |  |
Domestic and foreign qualified cash exclusions, maximum | $ 150,000,000.0 |  |  | $ 150,000,000.0 |  |  |  |
Domestic qualified cash | 33,800,000 |  |  | 33,800,000 |  |  |  |
Foreign qualified cash | 33,100,000 |  |  | $ 33,100,000 |  |  |  |
Commitment Fee Percentage |  |  |  | 0.25% |  |  |  |
Line of Credit | 2016 Credit Agreement | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Index rate or LIBOR plus (as a percent) |  |  |  | 1.50% |  |  |  |
Line of Credit | 2016 Credit Agreement | Base Rate |  |  |  |  |  |  |  |
Long-term Debt, by Current and Noncurrent [Abstract] |  |  |  |  |  |  |  |
Index rate or LIBOR plus (as a percent) |  |  |  | 0.50% |  |  |  |
Line of Credit | 2016 Credit Agreement | Term Loan Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Maximum borrowing capacity | 500,000,000.0 |  |  | $ 500,000,000.0 |  |  |  |
Line of Credit | 2016 Credit Agreement | Delayed Draw Term Loan Facility |  |  |  |  |  |  |  |
Line of Credit Facility [Abstract] |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 100,000,000.0 |  |  | $ 100,000,000.0 |  |  |  |

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- Definition Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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