Income Taxes - Rate Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2016	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Rate Reconciliation [Abstract]
U.S. federal tax rate		21.00%	21.00%	21.00%
Foreign rate differential		7.60%	12.90%	17.30%
Taxes on cross border income, net of credits		4.60%	11.00%	9.30%
Tax on accelerated U.S. income(a)		0.00%	0.00%	(7.90%)
Adjustments to valuation allowances		6.70%	6.60%	16.00%
Foreign income taxes		6.10%	10.60%	13.70%
French business tax		0.70%	3.70%	3.00%
State income taxes, net		0.90%	(1.60%)	(2.20%)
Share-based compensation		0.20%	(3.10%)	(4.80%)
Acquisition costs		0.50%	6.00%
Other		2.80%	4.30%	(0.20%)
Actual income tax rate on continuing operations		51.10%	71.40%	65.20%
Accelerated U.S. income tax expense	$ 23.5			$ 7.3

Effective Income Tax Rate Reconciliation, Acquisition Costs, percent

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Effective Income Tax Rate Reconciliation, Domestic Accelerated income, Amount

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Effective Income Tax Rate Reconciliation, Domestic Accelerated income, Percent

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Effective Income Tax Rate Reconciliation, Foreign income taxes, percent

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Effective Income Tax Rate Reconciliation, Taxes on cross border income, net of credits, percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage 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 changes in the valuation allowance for deferred tax assets.

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Percentage 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 applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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

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Percentage 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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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