Accounts receivable (Tables)

12 Months Ended

Dec. 31, 2018

Receivables [Abstract]

Schedule of Receivables Under Sales-Type Lease

As of December 31, 2018, receivables under sales-type leases before the allowance for unearned income were collectible as follows:

Year
2019	$	36.2
2020	15.2
2021	10.7
2022	10.1
2023	10.2
Thereafter	8.6
Total	$	91.0