Income Taxes (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosures [Line Items]
Federal Statutory Income Tax Rate	21.00%	21.00%	21.00%
U.S. taxed foreign income	$ 6.9	$ 8.7	$ 10.5
Effective Income Tax Rate Reconciliation, Percent	0.40%	(51.00%)
Foreign tax expense (benefit)	$ 38.2	$ 14.6	36.1
Income tax penalties and interest accrued	1.7	3.7
Operating loss carryforwards	984.3
Net loss carryforward, deferred tax asset	150.7	175.6
Operating loss carryforwards, set to expire	591.4
Operating loss carryforwards, no expiration	392.9
Tax credit carryforwards, foreign		59.8
Tax credit carryforwards, general business		8.5
Deferred tax asset, change in amount	32.3	11.8
Income Tax Expense (Benefit)	27.7	(1.0)	116.7
Deferred tax liability not recognized, amount of unrecognized deferred tax liability	547.7
Other	0.2	9.1	$ (5.0)
BARBADOS
Income Tax Disclosures [Line Items]
Foreign tax expense (benefit)		$ 46.3
U.S. Foreign And State Authority
Income Tax Disclosures [Line Items]
Income Tax Effects Allocated Directly to Equity	6.7
Income Tax Reversal Due To Expiration	(1.3)
Income Tax Expense (Benefit)	40.3
Domestic Tax Authority
Income Tax Disclosures [Line Items]
Income Tax Expense (Benefit)	$ 6.5