Leases Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Lease, Cost [Table Text Block]

The components of lease expense were as follows:

($ in millions)	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Operating lease cost	$	3.4	$	9.7
Short-term lease cost	0.1		0.5
Variable lease cost	0.8		2.3
Total lease cost	$	4.3	$	12.5

Lessee, Lease Cash Flow and Supplemental Information [Table Text Block]

Supplemental information related to leases was as follows:

($ in millions)	Three Months Ended September 30, 2019		Nine Months Ended September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	3.2	$	9.4
Right-of-use assets obtained in exchange for new operating lease liabilities	$	0.3	$	8.4

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Maturities of lease liabilities as of September 30, 2019 were as follows:

($ in millions)	Operating
Year	Leases
2019 (remaining three months)	$	3.4
2020	12.0
2021	10.2
2022	8.3
2023	7.7
Thereafter	48.1
	89.7
Less: imputed lease interest	(16.4		)
Total lease liabilities	$	73.3

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

of December 31, 2018 were as follows:

($ in millions)	Operating
Year	Leases
2019	$	13.0
2020	10.5
2021	7.8
2022	6.9
2023	5.5
Thereafter	37.8
Total	$	81.5