Income Taxes (Deferred Tax Assets (Liabilities) Resulting From Temporary Differences) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Tax loss and deduction carryforwards	$ 425.0	$ 1,997.5
Intangibles	218.5	188.3
Tax credit carryforwards	119.7	119.0
Interest carryforwards	76.3	48.3
All other future deductions	199.8	199.1
Valuation allowance	(815.4)	(2,327.6)
Total deferred tax assets	223.9	224.6
Deferred tax liabilities:
Total deferred tax liabilities	(105.0)	(90.8)
Net deferred tax assets	$ 118.9	$ 133.8