Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Condensed Consolidated Statements of Comprehensive Income
Net income (loss)	$ (134.5)	$ 343.2
Other comprehensive income (loss), net:
Net unrealized gains (losses) on available-for-sale securities	1,078.1	(4,112.2)
Net unrealized gains (losses) on derivative instruments		(18.8)
Liability for future policy benefits discount rate remeasurement gain (loss)	(540.9)	2,519.1
Market risk benefit nonperformance risk remeasurement gain	6.0	73.7
Foreign currency translation adjustment	132.1	155.1
Net unrecognized postretirement benefit obligation	3.8	6.7
Other comprehensive income (loss)	679.1	(1,376.4)
Comprehensive income (loss)	544.6	(1,033.2)
Comprehensive income (loss) attributable to noncontrolling interest	7.0	5.9
Comprehensive income (loss) attributable to Principal Financial Group, Inc.	$ 537.6	$ (1,039.1)