General - Pharmacy Benefit Management Revenue (Details)	3 Months Ended
Mar. 31, 2021
Minimum
Operating results by business segment
Expected term of PBM relationship	1 year

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.

No definition available.

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