Income Tax Net Deferred Tax Assets and Liabilities Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Deferred Income Tax Expense (Benefit)	$ 108.5	$ 214.1	$ (68.7)
Domestic net non-current deferred tax liabilities	1,488.5	1,353.2
Foreign net non-current deferred tax assets	34.8	26.8
Foreign net non-current deferred tax liabilities	701.7	727.9
Net non-current deferred tax liabilities	$ 2,155.4	$ 2,054.3