Segments of Business - Additional Information (Detail) $ in Millions		9 Months Ended
Apr. 01, 2020 USD ($)	Sep. 30, 2020 Segment
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment		3
Wilbert Funeral Services, Inc
Segment Reporting Information [Line Items]
Equity interest percentage	100.00%
Equity interest percentage acquired	55.00%
Purchase price for acquisition	$ 121.3
Cash consideration paid for acquisition	46.3
Incremental debt acquired	75.0
Goodwill	62.9
Wilbert Funeral Services, Inc \| Trade Name
Segment Reporting Information [Line Items]
Indefinite-lived intangible assets acquired	26.2
Wilbert Funeral Services, Inc \| Customer Relationship
Segment Reporting Information [Line Items]
Finite-lived intangible assets acquired	21.5
Wilbert Funeral Services, Inc \| License Agreements
Segment Reporting Information [Line Items]
Finite-lived intangible assets acquired	$ 14.9

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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