Allowance for Credit Losses (Tables)

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Allowance for credit losses and recorded investment in financing receivables

The following table summarizes the Company’s allowance for credit losses and amount of financing receivables evaluated for impairment:

	Finance Leases			Notes Receivable		Total
Allowance for credit losses
Balance at January 1, 2016	$	0.5		$	4.1	$	4.6
Write-offs	(0.2		)	—		(0.2		)
Balance at December 31, 2016	$	0.3		$	4.1	$	4.4
Provision for credit losses	0.1			—		0.1
Write-offs	(0.1		)	—		(0.1		)
Balance at December 31, 2017	$	0.3		$	4.1	$	4.4

Summarizes the Company's aging of past-due notes receivable

The following table summarizes the Company’s aging of past-due notes receivable balances:

	December 31,
	2017		2016
30-59 days past due	$	—	$	0.1
60-89 days past due	0.1		—
> 89 days past due	4.0		3.9
Total past due	$	4.1	$	4.0