Debt Obligations Future Maturities - Level 3 (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Maturities of Long-term Debt [Table Text Block]

Aggregate maturities of debt and minimum rentals under operating leases at December 31, 2017 for the Company are as follows:

Year	Debt		Minimum Rentals Under Operating Leases
2018	$	36	$	18
2019	—		14
2020	—		12
2021	1,100		10
2022	202		7
2023 and thereafter	—		10
Total	$	1,338	$	71

The Company’s operating leases consist primarily of vehicles, equipment, land and buildings. Rental expense amounted to $25, $23, and $24 for the years ended December 31, 2017, 2016 and 2015, respectively.