Derivative Instruments and Hedging Activities Hedging Activities (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current portion of long-term debt and short-term borrowings
Derivative [Line Items]
Carrying amount of the hedged assets/liabilities	$ 0.0	$ 0.0
Cumulative amount of fair value hedging adjustment(s) in the hedged assets/liabilities(1) Increase/(Decrease)	0.0	(0.2)
Long-term debt
Derivative [Line Items]
Carrying amount of the hedged assets/liabilities	0.0	0.0
Cumulative amount of fair value hedging adjustment(s) in the hedged assets/liabilities(1) Increase/(Decrease)	$ 5.8	$ 6.5