Derivative Financial Instruments and Hedging Activities - Schedule of Effect of Derivatives As Hedges, Net of Applicable Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)	$ (1,301.3)	$ (1,360.1)
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives	85.3	25.2
Ending Accumulated Other Comprehensive Loss (Gain)	(1,084.2)	(1,330.4)
Interest expense, net of interest income	36.5	37.2
Unrealized Hedging (Losses) Gains
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)	78.4
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives	85.3
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations	4.0
Ending Accumulated Other Comprehensive Loss (Gain)	167.7
Amount of loss (gain) recognized, tax expense (benefit)	(0.0)
Amount of loss (gain) reclassified, tax benefit (expense)	0.7
Unrealized Hedging (Losses) Gains
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)		(13.9)
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives		25.2
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives		25.2
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations		2.2
Ending Accumulated Other Comprehensive Loss (Gain)		13.5
Amount of loss (gain) recognized, tax expense (benefit)		5.1
Amount of loss (gain) reclassified, tax benefit (expense)		0.4
Cash Flow Hedging \| Unrealized Hedging (Losses) Gains \| Foreign currency hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)	0.0
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives	0.0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations	0.0
Ending Accumulated Other Comprehensive Loss (Gain)	0.0
Cash Flow Hedging \| Unrealized Hedging (Losses) Gains \| Interest rate hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)	79.0
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives	85.3
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations	4.0
Ending Accumulated Other Comprehensive Loss (Gain)	168.3
Cash Flow Hedging \| Unrealized Hedging (Losses) Gains \| Foreign currency hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)		0.0
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives		0.0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations		0.0
Ending Accumulated Other Comprehensive Loss (Gain)		0.0
Cash Flow Hedging \| Unrealized Hedging (Losses) Gains \| Interest rate hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)		(13.3)
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives		25.2
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations		2.2
Ending Accumulated Other Comprehensive Loss (Gain)		14.1
Net Investment Hedging \| Unrealized Hedging (Losses) Gains \| Foreign currency hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)	(0.6)
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives	0.0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations	0.0
Ending Accumulated Other Comprehensive Loss (Gain)	(0.6)
Net Investment Hedging \| Unrealized Hedging (Losses) Gains \| Foreign currency hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Accumulated Other Comprehensive Loss (Gain)		(0.6)
Amount of Loss (Gain) Recognized in Other Comprehensive Loss on Derivatives		0.0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Statement of Operations		0.0
Ending Accumulated Other Comprehensive Loss (Gain)		(0.6)
Reclassification out of Accumulated Other Comprehensive Income \| Unrealized Hedging (Losses) Gains \| Interest rate hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Interest expense, net of interest income	$ 4.7	$ 2.6

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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