Income Taxes (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
Oct. 07, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Change in valuation allowances		$ (158.1)
Change in valuation allowances		(39.0)	$ (62.2)	$ (8.4)
Cumulative temporary differences		1,400.0
Unrecognized tax benefits - favorable impact on effective income tax rate if ultimately recognized, net of valuation allowances		337.9	378.7	418.2
Income tax penalties and interest expense	$ 110.0	38.4	$ 25.7	$ 26.3
Accrued interest and penalties on tax related items		$ 203.3
Income Tax Contingency \| Tax Year 2018
Income Tax Contingency [Line Items]
Damages sought	$ 284.0

Cumulative Temporary Differences Not Assigned Deferred Tax Liabilities

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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 increase (decrease) in the valuation allowance for deferred tax assets.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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