Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Aggregate Minimum Payments under Operating Leases with Initial or Remaining Terms of More Than One Year

The following table presents the aggregate minimum payments under operating leases with initial or remaining terms of more than one year as of December 31, 2018:

Year	Aggregate Minimum Lease Payments
	($ in millions)
2019		$         39.2
2020		36.1
2021		32.9
2022		26.2
2023		24.9
2024 and thereafter		165.5

Asbestos Related Illnesses and Environmental Impairment Loss and Loss Adjustment Expense Reserves

Loss and LAE include amounts for risks related to asbestos-related illness and environmental impairment. The following table presents such gross and net reserves as of December 31, 2018 and 2017:

	December 31, 2018				December 31, 2017
	Gross		Net		Gross		Net
	($ in millions)
TransRe	$	128.1	$	124.6	$	152.4	$	148.0
CapSpecialty		5.6		5.6		6.0		6.0
Total	$	133.7	$	130.2	$	158.4	$	154.0