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Preneed Activities Deferred Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Deferred Revenue [Abstract] |  |  |  |
Deferred revenue, Gross |  | $ 1,999,092 |  | $ 1,789,776
Change in amounts due for unfulfilled performance obligations | $ (544,780) | (567,911) | $ 0 |
Deferred Revenue |  | $ 1,431,181 |  | $ 1,789,776

X
- Definition Change in amounts due for unfulfilled performance obligations + References No definition available. + Details
Name: | sci_Changeinamountsdueforunfulfilledperformanceobligations
Namespace Prefix: | sci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred revenue, Gross of amounts due from customers for unfulfilled performance obligations + References No definition available. + Details
Name: | sci_DeferredrevenueGross
Namespace Prefix: | sci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
Name: | us-gaap_DeferredRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DeferredRevenueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration