Lease Commitments

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Leases of Lessee Disclosure

Lease Commitments

We incurred $11.5, $9.5, and $11.1 of rental expense under operating leases for the years ended December 31, 2017, 2016 and 2015, 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, 2017:

2018	$	9.2
2019	7.1
2020	5.6
2021	4.1
2022	3.8
Thereafter	10.8
Total future minimum lease payments	$	40.6