Debt Acquisition Bridge Financing (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 1,500.0
Other income (expense), net	(14.7)	$ (12.0)	$ 1.4
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,500.0