| Document and Entity Information | Sep. 17, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 17, 2024 |
| Entity Registrant Name | Service Corporation International |
| Entity Incorporation State Country Code | TX |
| Entity File Number | 1-6402-1 |
| Entity Tax Identification Number | 74-1488375 |
| Entity Address Address Line 1 | 1929 Allen Parkway |
| Entity Address City Or Town | Houston |
| Entity Address State Or Province | TX |
| Entity Address Postal Zip Code | 77019 |
| City Area Code | 713 |
| Local Phone Number | 522-5141 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Security 12b Title | Common Stock ($1 par value) |
| Trading Symbol | SCI |
| Security Exchange Name | NYSE |
| Entity Central Index Key | 0000089089 |
| Amendment Flag | false |
