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Income Taxes Components of Income Tax Provision From Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 168.9	$ 86.0	$ 93.0
State	37.4	29.4	26.8
Federal and state deferred	(39.0)	45.8	10.9
Change in valuation allowance, net	0.3	0.2	3.5
Adjustments and settlements	0.7	0.4	(0.7)
Income tax provision	$ 168.3	$ 161.8	$ 133.5

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to income tax settlements and adjustments for the period.

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

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

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

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