Income Taxes	3 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, President Trump signed into law the U.S. Tax Reform Act. The provisions of the U.S. Tax Reform Act are effective for the Company’s year beginning January 1, 2018. As such, the income tax rate for the three months ended March 31, 2018 reflects the impact of the provisions of the U.S. Tax Reform Act. The Company’s effective tax rate for the three months ended March 31, 2018 and 2017 was 30.5% and 31.3%, respectively. The Company’s income tax rate for the three months ended March 31, 2018 and 2017 differed from the U.S. federal statutory rates of 21.0% and 35.0%, respectively, principally due to subpart F income (for the three months ended March 31, 2018 subpart F income is primarily due to global intangible low-taxed income (“GILTI”) earned by the Company’s foreign subsidiaries), certain foreign income tax rate differentials, state and local income taxes, certain other permanent differences, changes in the Company’s uncertain tax positions, and the excess tax deficiency (or benefit) related to stock-based compensation. The Company accounts for the GILTI tax in the period in which such tax arises. The estimated impacts of the U.S. Tax Reform Act recorded during 2017 and the three months ended March 31, 2018, are provisional in nature. The Company will continue to assess the impact of the U.S. Tax Reform Act and will record adjustments through the income tax provision in the relevant period as authoritative guidance is made available to the public. Accordingly, the impact of the U.S. Tax Reform Act may differ from the Company's provisional estimates due to and among other factors, information currently not available, changes in interpretations and the issuance of additional guidance, as well as changes in assumptions the Company has currently made, including actions the Company may take in future periods as a result of the U.S. Tax Reform Act. The Company has received income tax assessments from the Danish Tax Authority ("SKAT") with respect to the tax years 2001 through 2008 relating to the royalty paid by a U.S. subsidiary of Tempur Sealy International to a Danish subsidiary (the "Danish Assessments"). The royalty is paid by the U.S. subsidiary for the right to utilize certain intangible assets owned by the Danish subsidiary in the U.S. production process. In its assessment, SKAT asserts that the amount of royalty rate paid by the U.S. subsidiary to the Danish subsidiary is not reflective of an arms-length transaction. Accordingly, the tax assessment received from SKAT is based, in part, on a 20% royalty rate, which is substantially higher than that historically used or deemed appropriate by the Company. The cumulative total tax assessment at March 31, 2018 for all years for which an assessment has been received (2001 - 2008) is approximately Danish Krone ("DKK") 1,661.1 million, including interest and penalties ($274.6 million, based on the DKK to USD exchange rate on March 31, 2018). The cumulative total tax assessment at December 31, 2017 for all years for which an assessment had been received up through that date (2001 - 2008) including interest and penalties was approximately DKK 1,638.4 million ($264.3 million, based on the DKK to USD exchange rate on December 31, 2017). If SKAT continues to issue assessments for each year not currently assessed, the Company expects the aggregate assessments for such years (2009 - 2017) to be in excess of the amounts described above as assessed for the years 2001 - 2008 (collectively the years 2001 through 2017 are referred to as the "Danish Tax Matter"). At March 31, 2018 and December 31, 2017, the Company had accrued Danish tax and interest for the Danish Tax Matter of approximately DKK 860.5 million and DKK 854.7 million (approximately $142.2 million and $137.9 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable), respectively, as an uncertain income tax liability. On both March 31, 2018 and December 31, 2017 approximately DKK 836.3 million (approximately $138.2 million and $134.9 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable) represents the amount that the Company and SKAT preliminarily agreed to in a non-binding proposed resolution for the years 2001 through 2011. The remaining balance of the amount accrued for the Danish Tax Matter at March 31, 2018 and December 31, 2017, respectively, of approximately DKK 24.2 million and DKK 18.4 million (approximately $4.0 million and $3.0 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable) may be subject to further negotiation in the future as part of an Advanced Pricing Agreement the Company may choose to pursue for years after 2011. The uncertain income tax liability accrued is included in other non-current liabilities in the Company's Condensed Consolidated Balance Sheets. In addition, at both March 31, 2018 and December 31, 2017 the Company had recorded a deferred tax asset of approximately $49.0 million and $48.3 million, respectively, for the U.S. correlative benefit related to the Danish Tax Matter. The Company has recorded a valuation allowance with respect to this benefit of approximately $19.3 million for both periods related to years for which relief may not be realized. The Company’s uncertain tax liability associated with the Danish Tax Matter is derived using the cumulative probability analysis with possible outcomes based on the Company's updated evaluation of the facts and circumstances regarding this matter and applying the technical requirements applicable to U.S., Danish, and international transfer pricing standards as required by GAAP, taking into account both the U.S. and Danish income tax implications of such outcomes. Both the uncertain tax liability and the deferred tax asset discussed herein reflects the Company’s best judgment of the facts, circumstances and information available through March 31, 2018. If the Company is not successful in defending its position before the Danish National Tax Tribunal (the "Tribunal"), the appeals division within SKAT, or in the Danish courts or in negotiating a mutually acceptable settlement, there is significant risk that the Company could be required to pay significant amounts to SKAT in excess of any related reserve. Such an outcome could have a material adverse impact on the Company’s profitability and liquidity. In addition, prior to any ultimate resolution of this issue before the Tribunal or the Danish courts, based on a change in facts and circumstances, the Company may be required to further increase its uncertain tax liability associated with this matter, which could have a material impact on the Company's reported earnings. From June 2012 through March 31, 2018, SKAT withheld Value Added Tax refunds otherwise owed to the Company, pending resolution of the Danish Tax Matter. Total withheld refunds at March 31, 2018 and December 31, 2017 are approximately DKK 357.5 million and DKK 336.5 million (approximately $59.1 million and $54.2 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable), respectively. In July 2016, the Company paid a deposit to SKAT in the amount of approximately DKK 615.2 (approximately $101.7 million using the exchange rate at March 31, 2018) (the “Tax Deposit”) and applied approximately DKK 224.6 million (approximately $37.1 million using the exchange rate at March 31, 2018) of its Value Added Tax refund (the “VAT Refund Applied”) to the aforementioned potential Danish income tax liability, consistent with the Company’s reserve position for the Danish Tax Matter. The deposit was made to mitigate additional interest and foreign exchange exposure. The Tax Deposit and the VAT Refund Applied are included within other non-current assets on the Condensed Consolidated Balance Sheets. The amount of unrecognized tax benefits that would impact the effective tax rate if recognized at March 31, 2018 and December 31, 2017 would be $33.7 million and $31.7 million (exclusive of interest and penalties), respectively. Interest and penalties related to unrecognized tax benefits are recorded in income tax provision. It is reasonably possible that there could be material changes to the amount of uncertain tax positions due to activities of the taxing authorities, settlement of audit issues, reassessment of existing uncertain tax positions, including the Danish Tax Matter, or the expiration of applicable statute of limitations; however, the Company is not able to estimate the impact of these items at this time. There were no significant changes to the liability for unrecognized tax benefits during the three months ended March 31, 2018.

Income Taxes

On December 22, 2017, President Trump signed into law the U.S. Tax Reform Act. The provisions of the U.S. Tax Reform Act are effective for the Company’s year beginning January 1, 2018. As such, the income tax rate for the three months ended March 31, 2018 reflects the impact of the provisions of the U.S. Tax Reform Act.

The Company’s effective tax rate for the three months ended March 31, 2018 and 2017 was 30.5% and 31.3%, respectively. The Company’s income tax rate for the three months ended March 31, 2018 and 2017 differed from the U.S. federal statutory rates of 21.0% and 35.0%, respectively, principally due to subpart F income (for the three months ended March 31, 2018 subpart F income is primarily due to global intangible low-taxed income (“GILTI”) earned by the Company’s foreign subsidiaries), certain foreign income tax rate differentials, state and local income taxes, certain other permanent differences, changes in the Company’s uncertain tax positions, and the excess tax deficiency (or benefit) related to stock-based compensation. The Company accounts for the GILTI tax in the period in which such tax arises.

The estimated impacts of the U.S. Tax Reform Act recorded during 2017 and the three months ended March 31, 2018, are provisional in nature. The Company will continue to assess the impact of the U.S. Tax Reform Act and will record adjustments through the income tax provision in the relevant period as authoritative guidance is made available to the public. Accordingly, the impact of the U.S. Tax Reform Act may differ from the Company's provisional estimates due to and among other factors, information currently not available, changes in interpretations and the issuance of additional guidance, as well as changes in assumptions the Company has currently made, including actions the Company may take in future periods as a result of the U.S. Tax Reform Act.

The Company has received income tax assessments from the Danish Tax Authority ("SKAT") with respect to the tax years 2001 through 2008 relating to the royalty paid by a U.S. subsidiary of Tempur Sealy International to a Danish subsidiary (the "Danish Assessments"). The royalty is paid by the U.S. subsidiary for the right to utilize certain intangible assets owned by the Danish subsidiary in the U.S. production process. In its assessment, SKAT asserts that the amount of royalty rate paid by the U.S. subsidiary to the Danish subsidiary is not reflective of an arms-length transaction. Accordingly, the tax assessment received from SKAT is based, in part, on a 20% royalty rate, which is substantially higher than that historically used or deemed appropriate by the Company.

The cumulative total tax assessment at March 31, 2018 for all years for which an assessment has been received (2001 - 2008) is approximately Danish Krone ("DKK") 1,661.1 million, including interest and penalties ($274.6 million, based on the DKK to USD exchange rate on March 31, 2018). The cumulative total tax assessment at December 31, 2017 for all years for which an assessment had been received up through that date (2001 - 2008) including interest and penalties was approximately DKK 1,638.4 million ($264.3 million, based on the DKK to USD exchange rate on December 31, 2017). If SKAT continues to issue assessments for each year not currently assessed, the Company expects the aggregate assessments for such years (2009 - 2017) to be in excess of the amounts described above as assessed for the years 2001 - 2008 (collectively the years 2001 through 2017 are referred to as the "Danish Tax Matter").

At March 31, 2018 and December 31, 2017, the Company had accrued Danish tax and interest for the Danish Tax Matter of approximately DKK 860.5 million and DKK 854.7 million (approximately $142.2 million and $137.9 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable), respectively, as an uncertain income tax liability. On both March 31, 2018 and December 31, 2017 approximately DKK 836.3 million (approximately $138.2 million and $134.9 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable) represents the amount that the Company and SKAT preliminarily agreed to in a non-binding proposed resolution for the years 2001 through 2011. The remaining balance of the amount accrued for the Danish Tax Matter at March 31, 2018 and December 31, 2017, respectively, of approximately DKK 24.2 million and DKK 18.4 million (approximately $4.0 million and $3.0 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable) may be subject to further negotiation in the future as part of an Advanced Pricing Agreement the Company may choose to pursue for years after 2011. The uncertain income tax liability accrued is included in other non-current liabilities in the Company's Condensed Consolidated Balance Sheets. In addition, at both March 31, 2018 and December 31, 2017 the Company had recorded a deferred tax asset of approximately $49.0 million and $48.3 million, respectively, for the U.S. correlative benefit related to the Danish Tax Matter. The Company has recorded a valuation allowance with respect to this benefit of approximately $19.3 million for both periods related to years for which relief may not be realized.

The Company’s uncertain tax liability associated with the Danish Tax Matter is derived using the cumulative probability analysis with possible outcomes based on the Company's updated evaluation of the facts and circumstances regarding this matter and applying the technical requirements applicable to U.S., Danish, and international transfer pricing standards as required by GAAP, taking into account both the U.S. and Danish income tax implications of such outcomes. Both the uncertain tax liability and the deferred tax asset discussed herein reflects the Company’s best judgment of the facts, circumstances and information available through March 31, 2018.

If the Company is not successful in defending its position before the Danish National Tax Tribunal (the "Tribunal"), the appeals division within SKAT, or in the Danish courts or in negotiating a mutually acceptable settlement, there is significant risk that the Company could be required to pay significant amounts to SKAT in excess of any related reserve. Such an outcome could have a material adverse impact on the Company’s profitability and liquidity. In addition, prior to any ultimate resolution of this issue before the Tribunal or the Danish courts, based on a change in facts and circumstances, the Company may be required to further increase its uncertain tax liability associated with this matter, which could have a material impact on the Company's reported earnings.

From June 2012 through March 31, 2018, SKAT withheld Value Added Tax refunds otherwise owed to the Company, pending resolution of the Danish Tax Matter. Total withheld refunds at March 31, 2018 and December 31, 2017 are approximately DKK 357.5 million and DKK 336.5 million (approximately $59.1 million and $54.2 million using the March 31, 2018 and December 31, 2017 exchange rates, as applicable), respectively. In July 2016, the Company paid a deposit to SKAT in the amount of approximately DKK 615.2 (approximately $101.7 million using the exchange rate at March 31, 2018) (the “Tax Deposit”) and applied approximately DKK 224.6 million (approximately $37.1 million using the exchange rate at March 31, 2018) of its Value Added Tax refund (the “VAT Refund Applied”) to the aforementioned potential Danish income tax liability, consistent with the Company’s reserve position for the Danish Tax Matter. The deposit was made to mitigate additional interest and foreign exchange exposure. The Tax Deposit and the VAT Refund Applied are included within other non-current assets on the Condensed Consolidated Balance Sheets.

The amount of unrecognized tax benefits that would impact the effective tax rate if recognized at March 31, 2018 and December 31, 2017 would be $33.7 million and $31.7 million (exclusive of interest and penalties), respectively. Interest and penalties related to unrecognized tax benefits are recorded in income tax provision. It is reasonably possible that there could be material changes to the amount of uncertain tax positions due to activities of the taxing authorities, settlement of audit issues, reassessment of existing uncertain tax positions, including the Danish Tax Matter, or the expiration of applicable statute of limitations; however, the Company is not able to estimate the impact of these items at this time. There were no significant changes to the liability for unrecognized tax benefits during the three months ended March 31, 2018.