Lease Commitments

12 Months Ended

Dec. 31, 2018

We incurred $8.0, $9.3, and $7.6 of rental expense under operating leases for the years ended December 31, 2018, 2017 and 2016, respectively. Certain leases contain rent escalation clauses and lease concessions that require additional rental payments in the later years of the term. Rent expense for these types of leases is recognized on a straight-line basis over the minimum lease term. In addition, we have the right, but no obligation, to renew certain leases for various renewal terms.

The following table summarizes future minimum lease payments for non-cancelable operating leases as of December 31, 2018:



2019	$	7.9
2020	6.9
2021	5.7
2022	5.3
2023	4.6
Thereafter	9.2
Total future minimum lease payments	$	39.6