Consolidated Statements of Financial Position - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Assets
Fixed maturities, available-for-sale (2019 and 2018 include $97.9 million and $94.5 million related to consolidated variable interest entities)	$ 65,268.1	$ 60,108.5
Fixed maturities, trading	686.8	636.1
Equity securities (2019 and 2018 include $831.7 million and $774.8 million related to consolidated variable interest entities)	1,895.2	1,843.7
Mortgage loans	16,136.8	15,336.9
Real estate (2019 and 2018 include $384.8 million and $364.0 million related to consolidated variable interest entities)	1,740.4	1,729.7
Policy loans	800.9	801.4
Other investments (2019 and 2018 include $288.8 million and $457.9 million related to consolidated variable interest entities and $24.5 million and $23.6 million measured at fair value under the fair value option)	4,667.0	4,310.3
Total investments	91,195.2	84,766.6
Cash and cash equivalents	3,315.9	2,977.5
Accrued investment income	663.8	636.2
Premiums due and other receivables	1,549.2	1,413.1
Deferred acquisition costs	3,519.5	3,693.5
Property and equipment	959.5	767.3
Goodwill	1,111.5	1,100.0
Other intangibles	1,300.7	1,315.1
Separate account assets (2019 and 2018 include $40,957.2 million and $37,183.3 million related to consolidated variable interest entities)	162,848.6	144,987.9
Other assets	1,454.1	1,378.9
Total assets	267,918.0	243,036.1
Liabilities
Contractholder funds (2019 and 2018 include $397.1 million and $396.0 million related to consolidated variable interest entities)	39,658.8	39,699.7
Future policy benefits and claims	38,479.5	35,664.8
Other policyholder funds	996.2	888.4
Short-term debt	76.8	42.9
Long-term debt (2019 and 2018 include $64.2 million and $58.4 million related to consolidated variable interest entities)	3,762.4	3,259.6
Income taxes currently payable	19.8	25.3
Deferred income taxes	1,687.5	958.4
Separate account liabilities (2019 and 2018 include $40,957.2 million and $37,183.3 million related to consolidated variable interest entities)	162,848.6	144,987.9
Other liabilities (2019 and 2018 include $113.1 million and $104.9 million related to consolidated variable interest entities)	5,981.9	5,661.9
Total liabilities	253,511.5	231,188.9
Redeemable noncontrolling interest (2019 and 2018 include $194.9 million and $325.7 million related to consolidated variable interest entities)	304.5	391.2
Stockholders' equity
Common stock, par value $0.01 per share - 2,500.0 million shares authorized, 478.9 million and 476.7 million shares issued, and 278.6 million and 279.5 million shares outstanding in 2019 and 2018	4.8	4.8
Additional paid-in capital	10,130.7	10,060.7
Retained earnings (accumulated deficit)	10,805.8	10,290.2
Accumulated other comprehensive income (loss)	647.7	(1,565.1)
Treasury stock, at cost (200.3 million and 197.2 million shares in 2019 and 2018)	(7,554.3)	(7,400.6)
Total stockholders' equity attributable to Principal Financial Group, Inc.	14,034.7	11,390.0
Noncontrolling interest	67.3	66.0
Total stockholders' equity	14,102.0	11,456.0
Total liabilities and stockholders' equity	$ 267,918.0	$ 243,036.1