Document and Entity Information Document	9 Months Ended
	Sep. 30, 2020
Document Information [Line Items]
Entity Registrant Name	SERVICE CORPORATION INTERNATIONAL
Entity Central Index Key	0000089089
Current Fiscal Year End Date	--12-31
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Shell Company	false
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes