Restructuring and Impairment Activities Restructuring Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Balance at beginning of year	$ 1.4	$ 1.7
Accruals for announced programs	3.7	1.3
Cash payments	(4.2)	(3.3)
Other	(0.4)	1.8
Exchange rate impacts	0.0	(0.1)
Balance at end of period	$ 0.5	$ 1.4