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Segment Information - Reconciliation of Segment Assets to Consolidated (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Segment Information: Assets
Total assets	$ 334,491.8	$ 313,663.6
Retirement and Income Solutions
Segment Information: Assets
Total assets	235,235.5	222,967.0
Principal Asset Management
Segment Information: Assets
Total assets	48,881.7	43,029.4
Benefits and Protection
Segment Information: Assets
Total assets	48,239.8	46,006.7
Corporate
Segment Information: Assets
Total assets	$ 2,134.8	$ 1,660.5

X

- Definition

Amount of asset recognized for present right to economic benefit.

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