Segment Information - Countries Representing 10% or More in Net Sales and Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer
Total net sales	$ 454.7	$ 464.7	$ 456.7	$ 459.8	$ 478.4	$ 488.5	$ 501.6	$ 492.5	$ 1,835.9	$ 1,961.0	$ 1,878.6
Sales Revenue, Net | Geographic Concentration Risk | United States
Revenue, Major Customer
Total net sales									448.7	477.4	451.4
Sales Revenue, Net | Geographic Concentration Risk | China
Revenue, Major Customer
Total net sales									328.3	367.4	358.6
Sales Revenue, Net | Geographic Concentration Risk | Other countries
Revenue, Major Customer
Total net sales									$ 1,058.9	$ 1,116.2	$ 1,068.6