Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2020
Income Tax [Line Items]
Non-deductible interest	$ 77,000,000.0	$ 84,700,000
Decrease in Unrecognized Tax Benefits is Reasonably Possible				$ 4,200,000
Foreign tax credit carryforwards	145,800,000	135,300,000
Foreign earnings taxable as dividend	$ 61,000	$ 3,800,000	$ 307,600,000
Statutory income tax rate	19.00%	19.00%	19.00%
Deferred tax liabilities	$ 502,100,000	$ 505,200,000
Income tax holiday, aggregate dollar amount	$ 5,800,000
Income tax holiday, income tax benefits (in dollars per share)	$ 0.01
Accrued Interest and Penalties
Income Tax [Line Items]
Unrecognized Tax Benefits	$ 3,700,000	100,000	$ 2,800,000
Federal, State and Foreign Tax
Income Tax [Line Items]
Unrecognized Tax Benefits	71,100,000	$ 80,700,000	$ 91,000,000.0
Unrecorded tax credit [Member]
Income Tax [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 62,000,000.0