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Retirement Plans - Defined Contribution Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Retirement Benefits [Abstract] |  |  |
Eligible employee contribution maximum (percentage) | 85.00% |  |
Defined contribution plan, employment eligibility to receive matching contributions, minimum (in years) | 6 months |  |
Defined contribution plan, percentage of eligible employee contribution match, first tier (percentage) | 100.00% |  |
Defined contribution plan, percentage of eligible employee contributions matched fully, first tier (percentage) | 3.00% |  |
Defined contribution plan, eligible employee contribution match, second tier (percentage) | 50.00% |  |
Defined contribution plan, eligible employee contribution matched by the company, second tier (percentage) | 2.00% |  |
Defined contribution plan, cost recognized | $ 5.8 | $ 6.0 | $ 5.8

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- Definition Amount matched by the company for employer contributions to a defined contribution plan for the second tier of percentages applied to the employees additional contribution above the initial threshold level. + References No definition available. + Details
Name: | tpx_DefinedContributionPlanEligibleEmployeeContributionMatchSecondTier
Namespace Prefix: | tpx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The percentage of the employees contribution to a defined contribution above the initial matching threshold that the employer will match,, as per terms of the plan. + References No definition available. + Details
Name: | tpx_DefinedContributionPlanEligibleEmployeeContributionMatchedByCompanySecondTier
Namespace Prefix: | tpx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition For a defined contribution plan, the duration of employment for employees to be eligible to receive matching contributions. + References No definition available. + Details
Name: | tpx_DefinedContributionPlanEmploymenteligibilitytoreceivematchingcontributionsminimum
Namespace Prefix: | tpx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition For a defined contribution plan, eligible employee contributions for a first stated percentage amount, the percentage amount matched by the company for employer contribution as stated in the plan. + References No definition available. + Details
Name: | tpx_DefinedContributionPlanPercentageOfEligibleEmployeeContributionMatchFirstTier
Namespace Prefix: | tpx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of the employees first contributions to a defined contribution plan that the employer will match dollar for dollar. + References No definition available. + Details
Name: | tpx_DefinedContributionPlanPercentageOfEligibleEmployeeContributionsMatchedFullyFirstTier
Namespace Prefix: | tpx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition For a defined contribution plan, the maximum amount an eligible employee pay that may be contributed to the plan, stated as a percentage total pay within a period. + References No definition available. + Details
Name: | tpx_EligibleEmployeeContributionMaximum
Namespace Prefix: | tpx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration