Condensed Consolidated Statements of Financial Position - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Assets
Fixed maturities, available-for-sale (2019 includes $99.4 million related to consolidated variable interest entities)	$ 76,494.1	$ 70,106.2
Fixed maturities, trading	560.2	675.9
Equity securities (2020 and 2019 include $844.8 million and $810.9 million related to consolidated variable interest entities)	1,862.7	1,879.4
Mortgage loans	16,875.6	16,486.9
Real estate (2020 and 2019 include $454.2 million and $457.6 million related to consolidated variable interest entities)	1,781.8	1,714.8
Policy loans	783.4	798.0
Other investments (2020 and 2019 include $318.8 million and $263.7 million related to consolidated variable interest entities and $27.0 million and $22.8 million measured at fair value under the fair value option)	4,676.0	4,690.2
Total investments	103,033.8	96,351.4
Cash and cash equivalents	3,556.7	2,515.9
Accrued investment income	728.6	686.6
Premiums due and other receivables	1,530.2	1,740.3
Deferred acquisition costs	3,388.4	3,521.3
Property and equipment	998.8	967.7
Goodwill	1,653.3	1,693.8
Other intangibles	1,705.5	1,786.7
Separate account assets (2020 and 2019 include $36,267.2 million and $39,130.3 million related to consolidated variable interest entities)	160,737.3	165,468.0
Other assets	1,152.2	1,356.1
Total assets	278,484.8	276,087.8
Liabilities
Contractholder funds (2020 and 2019 include $393.9 million and $394.6 million related to consolidated variable interest entities)	42,947.1	41,367.5
Future policy benefits and claims	44,000.3	40,838.2
Other policyholder funds	1,006.2	959.4
Short-term debt	76.6	93.4
Long-term debt (2019 includes $64.2 million related to consolidated variable interest entities)	4,279.0	3,734.1
Income taxes currently payable	15.7	16.2
Deferred income taxes	2,106.9	1,796.6
Separate account liabilities (2020 and 2019 include $36,267.2 million and $39,130.3 million related to consolidated variable interest entities)	160,737.3	165,468.0
Other liabilities (2020 and 2019 include $35.3 million and $124.4 million related to consolidated variable interest entities)	7,316.1	6,863.7
Total liabilities	262,485.2	261,137.1
Redeemable noncontrolling interest (2020 and 2019 include $210.5 million and $215.4 million related to consolidated variable interest entities)	278.5	264.9
Stockholders' equity
Common stock, par value $0.01 per share - 2,500.0 million shares authorized, 481.7 million and 479.3 million shares issued, and 274.5 million and 276.6 million shares outstanding in 2020 and 2019	4.8	4.8
Additional paid-in capital	10,291.2	10,182.6
Retained earnings (accumulated deficit)	11,521.4	11,074.3
Accumulated other comprehensive income (loss)	1,747.1	1,037.9
Treasury stock, at cost (207.2 million and 202.7 million shares in 2020 and 2019)	(7,913.6)	(7,681.6)
Total stockholders' equity attributable to Principal Financial Group, Inc.	15,650.9	14,618.0
Noncontrolling interest	70.2	67.8
Total stockholders' equity	15,721.1	14,685.8
Total liabilities and stockholders' equity	$ 278,484.8	$ 276,087.8