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Revenues from Contracts with Customers - Disaggregation within Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total fees and other revenues | $ 1,128.7 | $ 1,091.1 | $ 3,289.0 | $ 3,205.4
Premiums and other considerations | 1,532.8 | 1,412.9 | 4,680.6 | 5,024.1
Net investment income (loss) | 1,200.5 | 1,167.6 | 3,529.0 | 3,325.9
Operating Segments |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 779.8 | 773.1 | 2,275.6 | 2,262.2
Operating Segments | Benefits and Protection |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 27.0 | 28.5 | 78.5 | 81.3
Operating Segments | Benefits and Protection | Specialty Benefits |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 4.0 | 3.8 | 11.7 | 11.6
Fees and other revenues not within the scope of revenue recognition guidance | 4.4 | 4.4 | 13.1 | 13.4
Total fees and other revenues | 8.4 | 8.2 | 24.8 | 25.0
Premiums and other considerations | 836.8 | 810.6 | 2,492.1 | 2,408.6
Net investment income (loss) | 51.3 | 50.1 | 155.7 | 141.9
Total operating revenues | 896.5 | 868.9 | 2,672.6 | 2,575.5
Operating Segments | Benefits and Protection | Specialty Benefits | Administrative service fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 4.0 | 3.8 | 11.7 | 11.6
Operating Segments | Benefits and Protection | Life Insurance |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 23.1 | 24.7 | 66.9 | 69.8
Fees and other revenues not within the scope of revenue recognition guidance | 89.7 | 84.9 | 271.1 | 251.6
Total fees and other revenues | 112.8 | 109.6 | 338.0 | 321.4
Premiums and other considerations | 136.1 | 131.5 | 384.0 | 380.7
Net investment income (loss) | 115.3 | 103.7 | 326.9 | 309.6
Total operating revenues | 364.2 | 344.8 | 1,048.9 | 1,011.7
Operating Segments | Benefits and Protection | Life Insurance | Administrative service fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 11.0 | 10.3 | 32.8 | 28.9
Operating Segments | Benefits and Protection | Life Insurance | Commission income |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 12.1 | 14.4 | 34.1 | 40.9
Operating Segments | Principal Asset Management |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 532.5 | 522.7 | 1,566.8 | 1,521.3
Operating Segments | Principal Asset Management | Investment Management |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 448.6 | 433.9 | 1,308.4 | 1,253.9
Fees and other revenues not within the scope of revenue recognition guidance | 8.9 | 4.1 | 21.5 | 14.9
Total fees and other revenues | 457.5 | 438.0 | 1,329.9 | 1,268.8
Net investment income (loss) | 26.4 | 28.4 | 74.9 | 77.3
Total operating revenues | 483.9 | 466.4 | 1,404.8 | 1,346.1
Operating Segments | Principal Asset Management | Investment Management | Management fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 409.5 | 390.1 | 1,186.7 | 1,134.9
Operating Segments | Principal Asset Management | Investment Management | Other fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 39.1 | 43.8 | 121.7 | 119.0
Operating Segments | Principal Asset Management | International Pension |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 88.7 | 92.3 | 272.5 | 279.2
Fees and other revenues not within the scope of revenue recognition guidance | 5.7 | 1.3 | 8.4 | 4.1
Total fees and other revenues | 94.4 | 93.6 | 280.9 | 283.3
Premiums and other considerations | 0.5 | 4.8 | 6.1 | 18.0
Net investment income (loss) | 153.1 | 179.0 | 439.6 | 445.0
Total operating revenues | 248.0 | 277.4 | 726.6 | 746.3
Operating Segments | Principal Asset Management | International Pension | Management fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 85.2 | 89.0 | 262.0 | 267.8
Operating Segments | Principal Asset Management | International Pension | Other fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 3.5 | 3.3 | 10.5 | 11.4
Operating Segments | Retirement and Income Solutions |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 155.4 | 169.3 | 449.3 | 493.3
Fees and other revenues not within the scope of revenue recognition guidance | 303.9 | 283.9 | 885.4 | 838.7
Total fees and other revenues | 459.3 | 453.2 | 1,334.7 | 1,332.0
Premiums and other considerations | 566.5 | 471.7 | 1,824.0 | 2,236.8
Net investment income (loss) | 860.4 | 761.5 | 2,521.0 | 2,244.3
Total operating revenues | 1,886.2 | 1,686.4 | 5,679.7 | 5,813.1
Operating Segments | Retirement and Income Solutions | Administrative service fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 150.5 | 165.3 | 435.3 | 481.6
Operating Segments | Retirement and Income Solutions | Deposit account fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 3.3 | 3.1 | 9.9 | 9.2
Operating Segments | Retirement and Income Solutions | Commission income |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 1.6 | 0.9 | 4.1 | 2.5
Operating Segments | Corporate |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 64.9 | 52.6 | 181.0 | 166.3
Fees and other revenues not within the scope of revenue recognition guidance | (81.4) | (78.7) | (238.4) | (235.8)
Total fees and other revenues | (16.5) | (26.1) | (57.4) | (69.5)
Premiums and other considerations | (1.3) | (1.3) | (4.0) | (3.9)
Net investment income (loss) | 42.0 | 58.5 | 144.3 | 142.0
Total operating revenues | 24.2 | 31.1 | 82.9 | 68.6
Operating Segments | Corporate | Other fee revenue |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 25.2 | 22.4 | 74.2 | 66.5
Operating Segments | Corporate | Commission income |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | 133.5 | 129.4 | 396.9 | 351.8
Operating Segments | Corporate | Revenue by type - Eliminations |  |  |  |
Revenues from Contracts with Customers - Disaggregation of Revenues |  |  |  |
Total revenues from contracts with customers | $ (93.8) | $ (99.2) | $ (290.1) | $ (252.0)

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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-10 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-14 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-11 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 5 -SubTopic 220 -Topic 946 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-5 + Details
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