Borrowing Arrangements - Long-Term Borrowings Table (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total obligations under Restated Credit Facility and other borrowings	$ 153.8	$ 195.1
Less: Current portion of obligations under Restated Credit Facility and other borrowings	20.6	20.4
Total long-term obligations under Restated Credit Facility and other borrowings	133.2	174.7
Restated Credit Facility, net of original discount on borrowings and deferred financing costs
Debt Instrument [Line Items]
Total obligations under Restated Credit Facility and other borrowings	151.0	193.4
Other borrowings
Debt Instrument [Line Items]
Total obligations under Restated Credit Facility and other borrowings	$ 2.8	$ 1.7