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Future Policy Benefits and Claims - Disaggregated Amounts Included in Future Policy Benefits and Claims (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | $ 36,514.6 | $ 34,064.4 |  | $ 43,489.8
Additional liability for certain benefit features | 5,326.5 | 4,095.2 |  |
Participating contracts | 3,060.5 | 3,207.2 |  |
Short-duration contracts |  | 1,295.6 |  |
Cost of reinsurance liability | 424.6 | 479.8 |  |
Reinsurance recoverable liability | 45.2 | 39.4 |  |
Other | 171.7 | 132.4 |  |
Future policy benefits and claims per consolidated statements of financial position | 46,826.5 | 43,314.0 |  |
Retirement and Income Solutions |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 28,769.9 | 26,230.8 |  | 33,009.5
Future policy benefits and claims per consolidated statements of financial position | 29,161.9 | 26,651.8 |  |
Retirement and Income Solutions | Pension risk transfer |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 23,855.8 | 21,211.4 |  | 25,863.7
Retirement and Income Solutions | Individual fixed income annuities |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 4,914.1 | 5,019.4 |  | 7,145.8
Principal Asset Management |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Future policy benefits and claims per consolidated statements of financial position | 4,595.6 | 5,043.8 |  |
Principal Asset Management | Principal International | Latin America | Individual fixed income annuities |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 4,593.7 | 5,042.3 |  | 6,561.5
Benefits and Protection |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 2,984.3 | 2,607.8 |  | 3,661.2
Future policy benefits and claims per consolidated statements of financial position | 12,888.3 | 11,411.6 |  |
Benefits and Protection | Specialty Benefits | Individual disability |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 1,898.4 | 1,698.8 | $ 2,498.4 | 2,500.9
Benefits and Protection | Life Insurance | Term life |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | 1,085.9 | 909.0 | 1,117.6 | 1,160.3
Benefits and Protection | Life Insurance | Universal life |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Additional liability for certain benefit features | 5,326.5 | 4,095.2 | 3,814.2 |
Corporate |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Future policy benefits and claims per consolidated statements of financial position | 180.7 | 206.8 |  |
Corporate | Long-term care insurance |  |  |  |
Future Policy Benefits and Claims |  |  |  |
Liability for future policy benefits | $ 166.7 | $ 183.5 | $ 234.7 | $ 257.6

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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 -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480016/944-40-65-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29E -Publisher FASB -URI https://asc.fasb.org//1943274/2147480046/944-40-55-29E Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-6 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-6 + Details
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