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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Components of Accumulated Other Comprehensive Loss

Components of Accumulated other comprehensive (loss) income were as follows ($ in millions):

			December 31,
			2021						2020
Accumulated pension and OPEB liability adjustments, net of income tax benefit of $8.9 million and $11.6 million at December 31, 2021 and 2020, respectively			$	(14.4)					$	(20.5)
Accumulated unrealized loss on derivative instruments, net of income tax benefit of $2.1 million and $2.8 million at December 31, 2021 and 2020, respectively			(1.9)						(13.1)
Accumulated unrealized foreign currency translation adjustments, net of income tax benefit of $9.5 million and $10.1 million at December 31, 2021 and 2020, respectively			(102.7)						(78.3)
Accumulated other comprehensive loss			$	(119.0)					$	(111.9)

Changes in the Components of Accumulated Other Comprehensive Loss

Changes in the components of Accumulated other comprehensive (loss) income were as follows ($ in millions):

			For the Years Ended December 31,
			2021																		2020																		2019
			Pre-tax						Tax						Net of Tax						Pre-tax						Tax						Net of Tax						Pre-tax						Tax						Net of Tax
Pension and OPEB liability adjustments			$	8.9					$	(2.8)					$	6.1					$	5.0					$	(1.2)					$	3.8					$	2.5					$	1.4					$	3.9
Derivative instrument adjustments			11.9						(0.7)						11.2						(10.8)						1.2						(9.6)						(2.9)						—						(2.9)
Unrealized foreign currency translation adjustments			(23.8)						(0.6)						(24.4)						11.5						5.0						16.5						(2.5)						3.4						0.9
Total			$	(3.0)					$	(4.1)					$	(7.1)					$	5.7					$	5.0					$	10.7					$	(2.9)					$	4.8					$	1.9

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Tabular disclosure of the components of accumulated other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

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Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1
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