Preneed Activities - Activity for the reserve for credit losses on preneed receivables (Details) $ in Thousands	6 Months Ended
Jun. 30, 2026 USD ($)
Deferred Revenue [Line Items]
Accounts Receivable, Allowance for Credit Loss, Noncurrent	$ (34,680)
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(1,598)
Accounts Receivable, Allowance for Credit Loss, Writeoff	2,341
Effect of Foreign Exchange on Allowance for Credit Loss	12
Accounts Receivable, Allowance for Credit Loss, Noncurrent	(33,925)
Funeral [Member]
Deferred Revenue [Line Items]
Accounts Receivable, Allowance for Credit Loss, Noncurrent	(20,632)
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(1,637)
Accounts Receivable, Allowance for Credit Loss, Writeoff	1,797
Effect of Foreign Exchange on Allowance for Credit Loss	2
Accounts Receivable, Allowance for Credit Loss, Noncurrent	(20,470)
Cemetery [Member]
Deferred Revenue [Line Items]
Accounts Receivable, Allowance for Credit Loss, Noncurrent	(14,048)
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	39
Accounts Receivable, Allowance for Credit Loss, Writeoff	544
Effect of Foreign Exchange on Allowance for Credit Loss	10
Accounts Receivable, Allowance for Credit Loss, Noncurrent	$ (13,455)

Effect of Foreign Exchange on Allowance for Credit Loss

No definition available.

Name:	sci_EffectofForeignExchangeonAllowanceforCreditLoss
Namespace Prefix:	sci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of allowance for credit loss on accounts receivable, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) in allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredRevenueArrangementLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sci_FuneralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sci_CemeteryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: