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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Summary of Provision for Income Taxes

		Year Ended December 31,
		2020				2019				2018
		(Dollars in millions)
Components of Earnings and Taxes from Operations
Income (Loss) Before Income Taxes:
U.S.		$	41.5			$	25.9			$	(71.4	)
International			(61.6	)			8.4				44.5
Total		$	(20.0	)		$	34.3			$	(26.9	)
Income Tax Expense (Benefit):
Current:
U.S.		$	(6.5	)		$	7.1			$	3.8
State and local			0.1				0.4				0.3
International			(2.6	)			17.5				20.4
Total current income tax expense			(9.0	)			25.0				24.5
Deferred:
U.S.			(1.1	)			(42.6	)			(14.1	)
State and local			0.1				(19.3	)			(2.2	)
International			(6.0	)			(7.5	)			0.2
Total deferred income tax benefit			(7.0	)			(69.4	)			(16.1	)
Total income tax (benefit) expense		$	(16.0	)		$	(44.4	)		$	8.4

Reconciliation of U.S. Federal Statutory Rate

		Year Ended December 31,
		2020				2019				2018
Effective Rate Reconciliation
U.S. statutory rate%			21.0	%			21.0	%			(21.0	)%
Change in valuation allowance			(0.3	)			(176.1	)			10.8
State income taxes, net of federal benefit			2.2				3.9				(31.2	)
Share-based compensation			3.9				(5.8	)			(10.0	)
International tax rate differential			8.9				3.8				13.4
Foreign dividend income			—				—				20.1
Foreign capital gain income			(7.5	)			3.2				7.1
Unremitted foreign earnings			14.5				(2.0	)			4.1
Global intangible low-taxed income			—				—				23.0
Base erosion tax			33.9				19.9				14.1
Reserve for tax contingencies			1.2				(0.3	)			0.4
Change in tax rate			—				(1.0	)			(5.9	)
Other			2.2				4.0				6.3
Income tax provision%			80.0	%			(129.4	)%			31.2	%

Schedule of Deferred Tax Assets and Liabilities

		December 31,
		2020				2019
		(Dollars in millions)
Tax Effect of Items That Comprise a Significant    Portion of the Net Deferred Tax Asset and Deferred    Tax Liability
Deferred Tax Asset:
Employment related accruals		$	9.8			$	41.6
Other			7.5				—
Foreign tax credit carryover and other credit    carryovers			0.2				0.3
Net operating loss carryforwards			125.9				82.7
Total gross deferred tax asset			143.4				124.6
Valuation allowance			(16.3	)			(15.1	)
Total deferred tax asset		$	127.1			$	109.5
Deferred Tax Liability:
Intangibles		$	(61.7	)		$	(57.3	)
Other			(55.2	)			(32.0	)
Total deferred tax liability			(116.9	)			(89.3	)
Net deferred tax asset (liability)		$	10.2			$	20.2

		December 31,
		2020				2019
		(Dollars in millions)
Net Deferred Tax by Geography
U.S.		$	22.0			$	32.2
International			(11.8	)			(12.0	)
Total		$	10.2			$	20.2

Summary of Activity Related to Unrecognized Tax Benefits

The following table summarizes the activity for unrecognized tax benefits:

		Year Ended December 31,
		2020				2019
		(Dollars in millions)
Federal, State and Foreign Tax
Beginning unrecognized tax balance		$	1.5			$	1.3
Increase prior period positions			0.1				0.1
Increase current period positions			0.2				0.2
Decrease prior period positions			—				(0.1	)
Ending unrecognized tax benefits		$	1.8			$	1.5

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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