Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets
Fixed maturities, available-for-sale (2019 includes $99.4 million related to consolidated variable interest entities)	$ 78,710.3	$ 70,106.2
Fixed maturities, trading	532.1	675.9
Equity securities (2020 and 2019 include $902.5 million and $810.9 million related to consolidated variable interest entities)	2,013.4	1,879.4
Mortgage loans (2020 includes $319.0 million related to consolidated variable interest entities)	17,343.0	16,486.9
Real estate (2020 and 2019 include $476.8 million and $457.6 million related to consolidated variable interest entities)	1,797.3	1,714.8
Policy loans	784.0	798.0
Other investments (2020 and 2019 include $348.5 million and $263.7 million related to consolidated variable interest entities and $28.5 million and $22.8 million measured at fair value under the fair value option)	5,126.8	4,690.2
Total investments	106,306.9	96,351.4
Cash and cash equivalents	2,849.8	2,515.9
Accrued investment income	710.6	686.6
Premiums due and other receivables	1,723.8	1,740.3
Deferred acquisition costs	3,409.7	3,521.3
Property and equipment	1,019.0	967.7
Goodwill	1,711.0	1,693.8
Other intangibles	1,723.0	1,786.7
Separate account assets (2020 and 2019 include $41,138.9 million and $39,130.3 million related to consolidated variable interest entities)	175,951.4	165,468.0
Other assets	1,222.5	1,356.1
Total assets	296,627.7	276,087.8
Liabilities
Contractholder funds (2020 and 2019 include $388.6 million and $394.6 million related to consolidated variable interest entities)	43,237.7	41,367.5
Future policy benefits and claims	45,207.2	40,838.2
Other policyholder funds	1,059.4	959.4
Short-term debt	84.7	93.4
Long-term debt (2019 includes $64.2 million related to consolidated variable interest entities)	4,279.2	3,734.1
Income taxes currently payable	22.3	16.2
Deferred income taxes	2,330.8	1,796.6
Separate account liabilities (2020 and 2019 include $41,138.9 million and $39,130.3 million related to consolidated variable interest entities)	175,951.4	165,468.0
Other liabilities (2020 and 2019 include $24.5 million and $124.4 million related to consolidated variable interest entities)	7,582.1	6,863.7
Total liabilities	279,754.8	261,137.1
Redeemable noncontrolling interest (2020 and 2019 include $226.8 million and $215.4 million related to consolidated variable interest entities)	255.6	264.9
Stockholders' equity
Common stock, par value $0.01 per share; 2,500 million shares authorized; 481.9 million and 479.3 million shares issued as of 2020 and 2019; 273.3 million and 276.6 million shares outstanding as of 2020 and 2019	4.8	4.8
Additional paid-in capital	10,321.6	10,182.6
Retained earnings (accumulated deficit)	11,838.0	11,074.3
Accumulated other comprehensive income (loss)	2,383.1	1,037.9
Treasury stock, at cost (208.6 million and 202.7 million shares as of 2020 and 2019)	(7,988.6)	(7,681.6)
Total stockholders' equity attributable to Principal Financial Group, Inc.	16,558.9	14,618.0
Noncontrolling interest	58.4	67.8
Total stockholders' equity	16,617.3	14,685.8
Total liabilities and stockholders' equity	$ 296,627.7	$ 276,087.8