Condensed Consolidated Statements of Financial Position (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fixed maturities, trading	$ 722.2	$ 760.7
Equity securities	1,760.2	1,708.6
Mortgage loans	20,229.0	20,629.8
Real estate	2,320.9	2,239.7
Other investments	6,569.2	6,122.0
Cash and Cash Equivalents, at Carrying Value	4,564.3	4,848.0
Separate account assets	155,478.2	155,375.1
Contractholder funds	42,303.9	42,825.3
Separate account liabilities	155,478.2	155,375.1
Other liabilities	11,436.0	12,096.7
Redeemable noncontrolling interest	$ 259.5	$ 262.0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	2,500,000,000	2,500,000,000
Common stock, issued (in shares)	491,996,113	489,809,564
Common stock, outstanding (in shares)	239,657,860	243,549,782
Treasury stock (in shares)	252,338,253	246,259,782
Aggregate consolidated variable interest entities
Fixed maturities, trading	$ 47.1	$ 27.8
Equity securities	699.8	740.0
Mortgage loans	1,079.5	1,179.7
Real estate	756.2	649.0
Other investments	523.9	375.9
Cash and Cash Equivalents, at Carrying Value	77.5	32.4
Separate account assets	32,537.2	34,193.8
Contractholder funds	309.5	334.0
Separate account liabilities	32,537.2	34,193.8
Other liabilities	83.9	86.8
Redeemable noncontrolling interest	$ 237.1	$ 235.3