Consolidated Statements of Financial Position (Parenthetical) - USD ($) shares in Millions, $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Equity securities	$ 1,708.6	$ 2,347.2
Mortgage loans	20,629.8	19,668.7
Real estate	2,239.7	2,075.4
Other investments	6,075.9	5,478.3
Cash and Cash Equivalents, at Carrying Value	4,848.0	2,332.0
Separate account assets	155,375.1	182,345.4
Contractholder funds	42,777.3	43,598.0
Separate account liabilities	155,375.1	182,345.4
Other liabilities	12,157.2	10,540.7
Redeemable noncontrolling interest	$ 262.0	$ 332.5
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)	489.8	484.9
Common stock, outstanding (in shares)	243.5	261.7
Treasury stock (in shares)	246.3	223.2
Aggregate consolidated variable interest entities
Equity securities	$ 740.0	$ 783.7
Mortgage loans	1,179.7	1,260.1
Real estate	649.0	672.0
Other investments	375.9	522.8
Cash and Cash Equivalents, at Carrying Value	32.4	49.6
Separate account assets	34,193.8	33,957.7
Contractholder funds	334.0	344.0
Separate account liabilities	34,193.8	33,957.7
Other liabilities	86.8	58.7
Redeemable noncontrolling interest	$ 235.3	$ 304.0