Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Supplemental cash flow information for operating leases

	Year Ended December 31,
(dollars in millions)	2020		2019
Supplemental Information for Operating Leases
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	19.1	$	21.2
ROU assets obtained in exchange for operating lease obligations	$	12.3	$	9.5
Weighted average remaining lease term	6 years		7 years
Weighted average discount rate	4.8%		4.9%

Maturities of operating lease liabilities

Maturities of operating lease liabilities at December 31, 2020 were as follows:

(dollars in millions)
2021	$	18.7
2022	15.5
2023	10.3
2024	5.4
2025	4.6
Thereafter	10.7
Total future minimum lease payments	65.2
Less: imputed interest	(8.7)
Present value of lease liabilities	$	56.5