Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Other Intangible Assets

Goodwill (Table)

	Retirement and Income Solutions		Principal Global Investors			Principal International		U.S. Insurance Solutions		Corporate		Consolidated
	(in millions)
Balance as of January 1, 2016	$	57.4	$	252.1		$	642.9	$	56.6	$	—	$	1,009.0
Foreign currency		—		(9.6	)		21.4		—		—		11.8
Balance as of December 31, 2016		57.4		242.5			664.3		56.6		—		1,020.8
Foreign currency		—		4.8			43.2		—		—		48.0
Balance as of December 31, 2017	$	57.4	$	247.3		$	707.5	$	56.6	$	—	$	1,068.8

Finite Lived Intangible Assets (Table)

	December 31,
	2017		2016
	(in millions)
Gross carrying value	$	782.9	$	756.2
Accumulated amortization		277.7		228.7
Net carrying value	$	505.2	$	527.5

Other Finite Lived Intangible Assets Estimated Amortization Expense (Table)

As of December 31, 2017, the estimated amortization expense for the next five years is as follows (in millions):

Year ending December 31:
2018	$	44.7
2019		43.5
2020		42.9
2021		40.4
2022		39.7