Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Financial Assets And Liabilities At Carrying and Fair Value

A summary of financial assets and liabilities that are measured at fair value on a recurring basis were as follows ($ in millions):

	Quoted Prices in Active Market (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
December 31, 2020:
Liabilities:
Interest rate swap derivative contracts	$	—	$	8.3	$	—	$	8.3
Cross-currency swap derivative contracts	$	—	$	61.8	$	—	$	61.8
Deferred compensation plans	$	—	$	11.8	$	—	$	11.8
December 31, 2019:
Assets:
Interest rate swap derivative contracts	$	—	$	0.1	$	—	$	0.1
Liabilities:
Cross-currency swap derivative contracts	$	—	$	8.9	$	—	$	8.9
Deferred compensation plans	$	—	$	7.2	$	—	$	7.2

The carrying amounts and fair values of the Company’s financial instruments as of December 31, were as follows ($ in millions):

	2020				2019
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Interest rate swap derivative contracts	$	—	$	—	$	0.1	$	0.1
Liabilities:
Interest rate swap derivative contracts	$	8.3	$	8.3	$	—	$	—
Cross-currency swap derivative contracts	$	61.8	$	61.8	$	8.9	$	8.9
Convertible senior notes due 2025	$	411.1	$	902.7	$	—	$	—
Long-term debt	$	907.7	$	907.7	$	1,321.0	$	1,321.0