Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Cash and cash equivalents

The following represents the Company's cash, cash equivalents and restricted cash as of December 31, 2020 and 2019, ($ in millions).

	December 31,
	2020		2019
Cash and cash equivalents	$	570.8	$	270.0
Restricted cash	0.6		0.3
Total cash, cash equivalents and restricted cash	$	571.4	$	270.3

Restricted cash

The following represents the Company's cash, cash equivalents and restricted cash as of December 31, 2020 and 2019, ($ in millions).

	December 31,
	2020		2019
Cash and cash equivalents	$	570.8	$	270.0
Restricted cash	0.6		0.3
Total cash, cash equivalents and restricted cash	$	571.4	$	270.3

Property and equipment, net

Depreciation is calculated using the straight-line method over the estimated useful life of the assets at the following rates:

	Years
Computers and electronic equipment	3
Furniture and equipment	6
Leasehold improvements	Shorter of lease term or useful life

Property and equipment, net consists of the following ($ in millions):

	December 31,
	2020		2019
Computer equipment and software	$	4.8	$	1.9
Leasehold improvements	2.2		1.2
Furniture and equipment	1.1		0.7
	8.1		3.8
Accumulated depreciation	(2.4)		(0.7)
Property and equipment, net	$	5.7	$	3.1