Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Components of Operating Lease Expense

The components of operating lease expense as of December 31 were as follows ($ in millions):

	2021		2020
Fixed operating lease expense (a)	$	32.4	$	35.7
Variable operating lease expense	6.1		6.6
Total operating lease expense	$	38.5	$	42.3

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(a)    Includes short-term leases and sublease income, both of which were not significant.

Schedule of Weighted Average Remaining Lease Term and Discount Rate

The following table presents the weighted average remaining lease term and weighted average discount rates related to the Company’s operating leases as of December 31:

	2021		2020
Weighted average remaining lease term	9 years		10 years
Weighted average discount rate	3.5	%	3.5	%

Schedule of Maturity Of Operating Lease Liabilities

The following table presents the maturity of the Company’s operating lease liabilities as of December 31, 2021 ($ in millions):

2022	$	28.1
2023	22.5
2024	19.4
2025	17.3
2026	16.7
Thereafter	65.2
Total operating lease payments	169.2
Less: imputed interest	(25.1)
Total operating lease liabilities	$	144.1