Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements of Comprehensive Income
Net income (loss)	$ 3,074.6	$ 371.6	$ 3,455.3	$ 887.9
Other comprehensive income (loss), net:
Net unrealized gains (losses) on available-for-sale securities	(3,567.7)	790.9	(7,241.6)	(582.5)
Net unrealized gains (losses) on derivative instruments	(11.4)	13.9	(27.7)	11.7
Foreign currency translation adjustment	(274.1)	35.4	(120.7)	(20.8)
Net unrecognized postretirement benefit obligation	8.3	9.6	15.0	11.9
Other comprehensive income (loss)	(3,844.9)	849.8	(7,375.0)	(579.7)
Comprehensive income (loss)	(770.3)	1,221.4	(3,919.7)	308.2
Comprehensive income (loss) attributable to noncontrolling interest	11.6	9.6	17.5	8.6
Comprehensive income (loss) attributable to Principal Financial Group, Inc.	$ (781.9)	$ 1,211.8	$ (3,937.2)	$ 299.6