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Insurance (Guarantees Related to Annuity Contracts) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Variable Annuity Guarantees: | Guaranteed Death Benefits |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |
Total account value | $ 46,345 | $ 62,281
Separate account value (1) | 30,066 | 42,043
Net amount at risk | $ 5,338 | $ 1,490
Average attained age of contractholders | 68 years | 68 years
Variable Annuity Guarantees: | Guaranteed Annuitization Benefits |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |
Total account value | $ 16,953 | $ 23,121
Separate account value (1) | 15,584 | 21,508
Net amount at risk | $ 433 | $ 500
Average attained age of contractholders | 68 years | 66 years
Other Annuity Guarantees: | Guaranteed Annuitization Benefits |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |
Total account value | $ 4,101 | $ 5,002
Net amount at risk | $ 188 | $ 196
Average attained age of contractholders | 57 years | 56 years

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- Definition Value of the general accounts corresponding to the specified product, guarantee type and subset of the guarantee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473 + Details
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- Definition Net amount at risk, representing the guaranteed benefit in excess of the current account balance corresponding to the specified product, guarantee type and subset of the guarantee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d)(3),(5) -URI https://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=124504833&loc=d3e7104-158389 + Details
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- Definition Weighted average attained age of policyholders or contract holders in the specified guarantee type and subset of guarantee class, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph ((d)(5)) -URI https://asc.fasb.org/extlink&oid=124508989&loc=d3e19393-158473 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=124504833&loc=d3e7104-158389 + Details
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