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Future Policy Benefits - Reconciliation of Net FPB to the Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Future policy benefits | $ 5,371 | $ 5,021 | $ 4,918 |
Traditional Life |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Future policy benefits | 1,382 | 1,354 | 1,752 |
Immediate Annuities |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Future policy benefits | 1,452 | 1,429 | 1,954 |
Deferred profit liability | 77 | 69 | 57 | $ 22
PRT |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Future policy benefits | 2,456 | 2,165 | 1,148 |
Deferred profit liability | 4 | 4 | 7 | $ 0
Immediate annuities DPL |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Deferred profit liability | 77 | 69 | 57 |
PRT DPL |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |
Deferred profit liability | $ 4 | $ 4 | $ 7 |

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- Definition Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 29E -URI https://asc.fasb.org/extlink&oid=126561865&loc=SL117819541-158441 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(13)(a)(1)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(1) -URI https://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 + Details
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