| Document and Entity Information | Oct. 29, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2020 |
| 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 |
