Condensed Consolidated Statements of Financial Position (Parenthetical) - USD ($) shares in Millions, $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Equity securities	$ 1,616.2	$ 2,347.2
Mortgage loans	20,602.6	19,668.7
Real estate	2,136.8	2,075.4
Other investments	5,609.8	5,478.3
Cash and Cash Equivalents, at Carrying Value	4,239.6	2,332.0
Separate account assets	146,571.4	182,345.4
Contractholder funds	43,618.5	43,598.0
Separate account liabilities	146,571.4	182,345.4
Other liabilities	12,247.9	10,540.7
Redeemable noncontrolling interest	$ 255.1	$ 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)	488.2	484.9
Common stock, outstanding (in shares)	244.9	261.7
Treasury stock (in shares)	243.3	223.2
Aggregate consolidated variable interest entities
Equity securities	$ 685.9	$ 783.7
Mortgage loans	1,494.7	1,260.1
Real estate	608.8	672.0
Other investments	365.4	522.8
Cash and Cash Equivalents, at Carrying Value	33.4	49.6
Separate account assets	29,357.8	33,957.7
Contractholder funds	332.9	344.0
Separate account liabilities	29,357.8	33,957.7
Other liabilities	99.1	58.7
Redeemable noncontrolling interest	$ 228.2	$ 304.0