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Supplemental Financial Information Supplemental Financial Information (Other Income) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
Bargain purchase gain		$ 637.0	$ 1.8	$ 140.2
Proceeds from Legal Settlements		200.0	0.0	0.0
Gain (Loss) on Extinguishment of Debt	$ 6.2	194.1	(19.0)	(2.6)
Payments for Legal Settlements		(20.3)	0.0	0.0
Net foreign currency exchange gains (losses)		(7.4)	(17.2)	(5.1)
Other Nonoperating Income		1.0		1.9
Other Nonoperating Expense			(0.4)
Other, net		$ 1,004.4	$ (34.8)	$ 134.4

X

- Definition

In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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