Operating Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Components of lease expense and Supplemental Cash Flow Information

The components of lease expense for the year ended December 31, 2020 and December 31, 2019 were as follows:

$ in millions	Year ended December 31, 2020	Year ended December 31, 2019
Operating lease cost	91.6	70.0
Variable lease cost	23.4	26.8
Less: sublease income	(2.1)	(0.6)
Total lease expense	112.9	96.2

Supplemental cash flow information related to leases for the year ended December 31, 2020 and December 31, 2019 were as follows:

$ in millions	Year ended December 31, 2020	Year ended December 31, 2019
Operating cash flows from operating leases included in the measurement of lease liabilities	98.3	72.8
Right-of-use assets obtained in exchange for new operating lease liabilities	36.7	167.7

Maturities of Company's lease liabilities

As of December 31, 2020, the maturities of the company’s lease liabilities (primarily related to real estate leases) were as follows:

$ in millions
Year Ending December 31,2020	Lease Liabilities
2021	81.2
2022	69.9
2023	56.5
2024	39.9
2025	31.4
Thereafter	72.7
Total lease payments	351.6
Less: interest	(32.4)
Present value of lease liabilities	319.2