Retirement and Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of weighted average assumption rates

The weighted average assumption rates used for benefit obligations were as follows:

	Year Ended December 31,
	2015	2014
Discount rate:
United States plans	1.00% - 4.25%	1.00% - 4.00%
International plans	2.30% - 8.00%	1.65% - 7.00%
Rate of compensation increase:
United States plans	—	—
International plans	2.00% - 3.20%	2.00% - 3.30%