Acquisitions and Dispositions (Sale of Hope) (Narrative) (Detail) - Ullico Inc - Subsequent Event $ in Millions	1 Months Ended
Feb. 28, 2022 USD ($)
Business Acquisition And Dispositions [Line Items]
Percentage of equity interests expected to be sold	100.00%
Cash consideration from sale of equity interest	$ 690

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

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