Condensed Consolidated Statements of Financial Position (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Equity securities	$ 1,733.3	$ 1,708.6
Mortgage loans	20,603.5	20,629.8
Real estate	2,300.1	2,239.7
Other investments	6,421.5	6,122.0
Cash and Cash Equivalents, at Carrying Value	4,640.9	4,848.0
Separate account assets	162,000.8	155,375.1
Contractholder funds	42,958.0	42,825.3
Separate account liabilities	162,000.8	155,375.1
Other liabilities	11,411.8	12,096.7
Redeemable noncontrolling interest	$ 272.7	$ 262.0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	2,500.0	2,500.0
Common stock, issued (in shares)	491.5	489.8
Common stock, outstanding (in shares)	243.1	243.5
Treasury stock (in shares)	248.4	246.3
Aggregate consolidated variable interest entities
Equity securities	$ 761.6	$ 740.0
Mortgage loans	1,166.7	1,179.7
Real estate	710.3	649.0
Other investments	396.6	375.9
Cash and Cash Equivalents, at Carrying Value	44.5	32.4
Separate account assets	36,276.3	34,193.8
Contractholder funds	329.2	334.0
Separate account liabilities	36,276.3	34,193.8
Other liabilities	101.2	86.8
Redeemable noncontrolling interest	$ 250.9	$ 235.3