Commitment and Contingent Liabilities (Tables)

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Aggregate minimum rental commitments under non-cancelable leases

Aggregate minimum rental commitments under non-cancelable leases at March 31, 2021 are as follows ($ in millions):

2021 (remaining nine months)	$	3.7
2022	4.9
2023	2.8
2024	2.7
2025 and thereafter	4.0
	$	18.1