Segment Information (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
PIRM
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	$ 3.7	$ 2.2	$ 7.7	$ 4.0
Segment reporting intercompany expense	0.6	1.0	1.4	1.8
UWS
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	0.6	1.0	1.3	1.8
Segment reporting intercompany expense	1.8	2.2	3.6	4.0
Corporate
Segment Reporting Information [Line Items]
Segment reporting intercompany expense	$ 1.9	$ 0.0	$ 4.1	$ 0.0