Other Assets (Tables)

12 Months Ended

Dec. 31, 2020

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Other Assets

Other assets consisted of the following ($ in millions):

	December 31,
	2020		2019
Capitalized software costs, net of accumulated amortization	$	12.9	$	11.9
Grantor trust assets	18.0		14.7
Net pension assets	9.3		5.9
Long-term supplies inventory	6.6		6.9
Operating lease assets	19.8		20.9
Other assets	2.6		8.9
Total	$	69.2	$	69.2