Cost of Contracts, net (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Schedule of Contract Cost

Cost of contracts, net, as of December 31, 2021 and 2020 was as follows:

	December 31,
(millions)	2021			2020
Cost of contracts	$	23.3		$	26.0
Accumulated amortization		(19.5	)		(21.2	)
Cost of contracts, net	$	3.8		$	4.8

Schedule of Amortization Expense Related to Cost of Contracts

The Company's amortization expense related to costs of contracts for the years ended December 31, 2021, 2020 and 2019, which was included in Services revenue within the Consolidated Statements of Income (Loss), was as follows:

	Year Ended December 31,
(millions)	2021		2020		2019
Cost of contracts expense	$	1.0	$	1.0	$	0.7
Weighted average life (years)		7.0		7.8		10.0