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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
Interest And Penalties [Abstract]
Change in unrecognized tax benefit			$ 4.2
Unrecognized tax benefits	$ 32.6		32.6
Unrecognized tax benefits that would impact effective tax rate	27.8		27.8
Unrecognized tax benefits, income tax penalties and interest accrued				$ 9.0
Income Tax (Expense) Benefit, Continuing Operations [Abstract]
Effective income tax rate reconciliation, other expense (benefit) reconciling items, amount	49.6	$ 45.2
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	3.1		1.1
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	1.0		0.6
Effective Income Tax Rate Reconciliation, Stock Options			2.0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Amount	42.7		42.7
Other Foreign
Income Tax (Expense) Benefit, Continuing Operations [Abstract]
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	$ 2.8		$ 2.8

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- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to write-offs of expired stock options.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible restructuring charges.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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