Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Condensed Consolidated Statements of Comprehensive Income
Net income (loss)	$ 1,250.1	$ 1,311.6	$ 1,509.3	$ 4,788.7
Other comprehensive income (loss), net:
Net unrealized gains (losses) on available-for-sale securities	(1,809.4)	(2,814.9)	(1,273.7)	(10,788.0)
Net unrealized gains (losses) on derivative instruments	(14.9)	79.2	(20.7)	49.5
Liability for future policy benefits discount rate remeasurement gain (loss)	1,373.6	1,511.6	1,341.9	5,340.0
Market risk benefit nonperformance risk remeasurement gain (loss)	(17.9)	(2.9)	(17.5)	131.0
Foreign currency translation adjustment	(133.4)	(54.3)	8.6	(167.7)
Net unrecognized postretirement benefit obligation	4.2	7.0	(1.1)	22.0
Other comprehensive income (loss)	(597.8)	(1,274.3)	37.5	(5,413.2)
Comprehensive income (loss)	652.3	37.3	1,546.8	(624.5)
Comprehensive income (loss) attributable to noncontrolling interest	1.8	(3.4)	13.8	14.1
Comprehensive income (loss) attributable to Principal Financial Group, Inc.	$ 650.5	$ 40.7	$ 1,533.0	$ (638.6)