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Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 870.2	$ 796.5	$ 816.1
Ending Balance	957.2	870.2	796.5
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(240.4)	(233.4)	(246.8)
Other comprehensive income (loss)	(28.8)	(7.0)	13.4
Ending Balance	(269.2)	(240.4)	(233.4)
Accumulated Defined Benefit Plans Adjustment | Defined benefit pension plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(163.3)	(214.5)	(202.2)
Other comprehensive income (loss)	9.9	14.9	13.4
Net actuarial gain (loss) arising during year	90.3	36.3	(25.7)
Ending Balance	(63.1)	(163.3)	(214.5)
Accumulated Defined Benefit Plans Adjustment | OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(0.4)	(0.3)	0.2
Other comprehensive income (loss)	(0.3)	(0.3)	(0.2)
Net actuarial gain (loss) arising during year	1.5	0.2	(0.3)
Ending Balance	0.8	(0.4)	(0.3)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(404.1)	(448.2)	(448.8)
Other comprehensive income (loss)	72.6	44.1	0.6
Ending Balance	$ (331.5)	$ (404.1)	$ (448.2)

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Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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