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Condensed Consolidated Statements of Financial Position (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fixed maturities, available-for-sale	$ 68,707.8	$ 70,106.2
Equity securities	1,664.1	1,879.4
Real estate	1,657.5	1,714.8
Other investments	4,707.0	4,690.2
Other investments measured at fair value under fair value option	22.7	22.8
Separate account assets	136,836.0	165,468.0
Contractholder funds	42,126.6	41,367.5
Long-term debt	3,670.1	3,734.1
Separate account liabilities (2020 and 2019 include $30,858.6 million and $39,130.3 million related to consolidated variable interest entities)	136,836.0	165,468.0
Other liabilities	7,383.4	6,863.7
Redeemable noncontrolling interest	$ 239.7	$ 264.9
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)	480.5	479.3
Common stock, outstanding (in shares)	273.4	276.6
Treasury stock (in shares)	207.1	202.7
Aggregate consolidated variable interest entities
Fixed maturities, available-for-sale	$ 34.8	$ 99.4
Equity securities	728.5	810.9
Real estate	395.7	457.6
Other investments	270.4	263.7
Separate account assets	30,858.6	39,130.3
Contractholder funds	397.5	394.6
Long-term debt		64.2
Separate account liabilities (2020 and 2019 include $30,858.6 million and $39,130.3 million related to consolidated variable interest entities)	30,858.6	39,130.3
Other liabilities	69.6	124.4
Redeemable noncontrolling interest	$ 187.6	$ 215.4

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