Condensed Consolidated Statements of Financial Position - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Assets
Fixed maturities, available-for-sale (2019 includes $99.4 million related to consolidated variable interest entities)	$ 74,269.2	$ 70,106.2
Fixed maturities, trading	583.8	675.9
Equity securities (2020 and 2019 include $837.6 million and $810.9 million related to consolidated variable interest entities)	1,778.5	1,879.4
Mortgage loans	16,696.6	16,486.9
Real estate (2020 and 2019 include $428.0 million and $457.6 million related to consolidated variable interest entities)	1,699.7	1,714.8
Policy loans	796.4	798.0
Other investments (2020 and 2019 include $294.2 million and $263.7 million related to consolidated variable interest entities and $25.4 million and $22.8 million measured at fair value under the fair value option)	4,734.4	4,690.2
Total investments	100,558.6	96,351.4
Cash and cash equivalents	3,150.4	2,515.9
Accrued investment income	702.1	686.6
Premiums due and other receivables	1,760.0	1,740.3
Deferred acquisition costs	3,487.7	3,521.3
Property and equipment	993.1	967.7
Goodwill	1,630.9	1,693.8
Other intangibles	1,709.3	1,786.7
Separate account assets (2020 and 2019 include $36,058.8 million and $39,130.3 million related to consolidated variable interest entities)	155,936.3	165,468.0
Other assets	1,381.0	1,356.1
Total assets	271,309.4	276,087.8
Liabilities
Contractholder funds (2020 and 2019 include $395.5 million and $394.6 million related to consolidated variable interest entities)	42,308.4	41,367.5
Future policy benefits and claims	42,896.1	40,838.2
Other policyholder funds	987.4	959.4
Short-term debt	76.3	93.4
Long-term debt (2019 includes $64.2 million related to consolidated variable interest entities)	4,163.4	3,734.1
Income taxes currently payable	16.3	16.2
Deferred income taxes	2,061.5	1,796.6
Separate account liabilities (2020 and 2019 include $36,058.8 million and $39,130.3 million related to consolidated variable interest entities)	155,936.3	165,468.0
Other liabilities (2020 and 2019 include $38.2 million and $124.4 million related to consolidated variable interest entities)	7,280.0	6,863.7
Total liabilities	255,725.7	261,137.1
Redeemable noncontrolling interest (2020 and 2019 include $197.5 million and $215.4 million related to consolidated variable interest entities)	272.7	264.9
Stockholders' equity
Common stock, par value $0.01 per share - 2,500.0 million shares authorized, 481.1 million and 479.3 million shares issued, and 274.0 million and 276.6 million shares outstanding in 2020 and 2019	4.8	4.8
Additional paid-in capital	10,259.6	10,182.6
Retained earnings (accumulated deficit)	11,441.4	11,074.3
Accumulated other comprehensive income (loss)	1,450.7	1,037.9
Treasury stock, at cost (207.1 million and 202.7 million shares in 2020 and 2019)	(7,913.4)	(7,681.6)
Total stockholders' equity attributable to Principal Financial Group, Inc.	15,243.1	14,618.0
Noncontrolling interest	67.9	67.8
Total stockholders' equity	15,311.0	14,685.8
Total liabilities and stockholders' equity	$ 271,309.4	$ 276,087.8