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Commitments and Contingencies (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 USD ($) lease | Mar. 31, 2021 USD ($) | Dec. 31, 2012 member | Sep. 30, 2020 claim
Commitments and Contingencies Disclosure [Abstract] |  |  |  |
Guarantor obligations, number of leases | lease | 68 |  |  |
Sample size | member |  |  | 200 |
Loss Contingencies [Line Items] |  |  |  |
Legal settlement accrual | $ 484 | $ 0 |  |
State of Florida Settlement |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Legal settlement accrual | $ 484 |  |  |
Legal settlement, period of payment | 18 years |  |  |
Liability recorded in association with pending legal settlement | $ 484 |  |  |
Radcliffe and Flaim v. Aetna Inc., et al | Pending Litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of claims | claim |  |  |  | 2

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- Definition Loss Contingency, Audit Methodology Sample Size + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
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- Details
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