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Income Taxes - Consolidated Provision Attributable to Controlling and Non-Controlling Interests (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income tax provision
Current taxes	$ 54.6	$ 58.7	$ 129.4
Deferred taxes	26.8	(55.8)	51.9
Income tax expense	$ 81.4	$ 2.9	$ 181.3
Effective tax rate	16.00%	0.90%	25.40%
Parent Company
Income tax provision
Current taxes	$ 44.6	$ 46.5	$ 117.2
Intangible-related deferred taxes	(9.9)	(51.3)	79.7
Other deferred taxes	34.8	(4.3)	(27.5)
Income tax expense	69.5	(9.1)	169.4
Income before income taxes (controlling interest)	$ 271.7	$ 6.6	$ 413.0
Effective tax rate	25.60%	(137.00%)	41.00%
Non-Controlling Interests
Income tax provision
Current taxes	$ 10.0	$ 12.2	$ 12.2
Deferred taxes	1.9	(0.2)	(0.3)
Income tax expense	$ 11.9	$ 12.0	$ 11.9

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- Definition

The component of income tax expense for the period representing the tax effect of the difference between amortization of intangibles for book purposes and amortization of intangibles for tax purposes.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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