Derivative Financial Instruments and Hedging Activities - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Pre-tax gain included in accumulated other comprehensive loss for interest rate derivatives	$ 74.5	$ (16.5)
Pre-tax gains reclassified within next twelve months	8.2
Derivative Asset, Notional Amount	498.2	406.6
Gain (loss) on derivative instruments	0.9	(1.0)	$ 3.1
Unrealized Hedging (Losses) Gains
Derivative [Line Items]
Amount of loss (gain) recognized, tax expense (benefit)	4.4	$ 0.7	(2.9)
Designated | Interest rate swaps
Derivative [Line Items]
Number of derivative instruments held		5
Number of derivative instruments terminated		16
Interest Expense | Unrealized Hedging (Losses) Gains | Interest rate hedge
Derivative [Line Items]
(Gains) losses reclassified into earnings, pre-tax	$ (6.9)	$ (9.8)	8.4
Interest Expense | Unrealized Hedging (Losses) Gains | Foreign Currency Hedge
Derivative [Line Items]
(Gains) losses reclassified into earnings, pre-tax		(0.2)
Interest Expense | Unrealized Hedging Losses | Foreign Currency Hedge
Derivative [Line Items]
(Gains) losses reclassified into earnings, pre-tax			0.1
Operating, Administrative and Other | Unrealized Hedging (Losses) Gains | Foreign Currency Hedge
Derivative [Line Items]
(Gains) losses reclassified into earnings, pre-tax		$ (5.1)
Operating, Administrative and Other | Unrealized Hedging Losses | Foreign Currency Hedge
Derivative [Line Items]
(Gains) losses reclassified into earnings, pre-tax			$ 12.0