Commitments and Contingencies Leases (Notes)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Leases of Lessee Disclosure [Text Block]

Lease Commitments

We have entered into various non-cancellable operating lease agreements for certain of our offices and facilities throughout the world with original lease periods expiring primarily between 2018 and 2024. Some of these agreements have escalating rent payment provisions. We recognize rent expense under such agreements on a straight-line basis.

Our rent expense under operating leases was $7.9 million in 2017, $0.6 million in 2016 and $0.4 million in 2015. 

As of December 31, 2017, future minimum lease payments under our non-cancelable operating leases are as follows over each of the next five years and thereafter (in millions):

2018	$	8,775
2019	5,907
2020	4,059
2021	3,214
2022	3,105
Thereafter	6,446
Total	$	31,506