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Acquisitions (Details) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 01, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2022
Cigna's Life Insurance Business in Asia-Pacific Markets [Member] | Subsequent Event [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Acquisition, Effective Date of Acquisition | Jul. 01, 2022 |  |  |  |
Payments to Acquire Businesses, Gross | $ 5,360 |  |  |  |
Huatai Group [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Equity method investment, additional 31.8 percent agreed on |  |  | 31.80% |  |
Purchase of incremental ownership interest |  |  | $ 2,200 |  |
Deposits Assets |  |  | $ 1,100 |  |
Payment to acquire additional ownership interest in equity method investment |  | $ 113 |  | $ 500 |
Equity method investment, additional 7.1 percentage agreed on |  |  |  | 7.10% |
Huatai Group [Member] | Direct ownership |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 47.30%

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