Leases (Tables)

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Schedule of Lease, Cost

The components of lease expense were as follows:

	Three Months Ended March 31,
($ in millions)	2021		2020
Operating lease cost	$	3.1	$	3.1
Short-term lease cost	0.2		0.2
Variable lease cost	0.8		0.8
Total lease cost	$	4.1	$	4.1

Supplemental cash flow information related to leases were as follows:

	Three Months Ended March 31,
($ in millions)	2021		2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	3.2	$	3.2
Right-of-use assets obtained in exchange for new operating lease liabilities	$	0.5	$	2.5

Schedule of Lessee, Operating Lease, Liability, Maturity

Maturities of operating lease liabilities were as follows:

($ in millions)	March 31,		December 31,
Year	2021		2020
2021 (remaining nine months)	$	8.9	$	12.4
2022	10.1		10.4
2023	9.2		9.3
2024	8.5		8.7
2025	6.6		6.9
Thereafter	37.2		37.5
	80.5		85.2
Less: imputed lease interest	(13.7)		(14.7)
Total lease liabilities	$	66.8	$	70.5