| Document and Entity Information | Aug. 02, 2021 | Jul. 29, 2021 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Aug. 2, 2021 | |
| Entity Registrant Name | TEMPUR SEALY INTERNATIONAL, INC. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-31922 | |
| Entity Tax Identification Number | 33-1022198 | |
| Entity Address, Address Line One | 1000 Tempur Way | |
| Entity Address, City or Town | Lexington | |
| Entity Address, State or Province | KY | |
| Entity Address, Postal Zip Code | 40511 | |
| City Area Code | 800 | |
| Local Phone Number | 878-8889 | |
| Title of 12(b) Security | Common Stock, $0.01 par value | |
| Trading Symbol | TPX | |
| Security Exchange Name | NYSE | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Amendment Flag | false | |
| Entity Central Index Key | 0001206264 |
