Document and Entity Information Document - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 11, 2022
Document Information [Line Items]
Entity Registrant Name	SERVICE CORPORATION INTERNATIONAL
Entity Central Index Key	0000089089
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Shell Company	false
Amendment Flag	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		161,507,628
Entity Emerging Growth Company	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes