The following table provides the components of the Company's other expense for the three and six months ended June 30, 2017 and 2016:



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
	(in millions)
Transportation commitment charges (a)	$	43	$	25	$	82	$	50
Loss from vertical integration services (b)	5		16		11		29
Idle drilling and well service equipment charges (c)	—		11		—		47
Other	11		15		26		28
Total other expense	$	59	$	67	$	119	$	154

____________________


(a)	Primarily represents firm transportation payments on excess pipeline capacity commitments.

(b)

Loss from vertical integration services primarily represents net margins (attributable to third party working interest owners) that result from Company-provided fracture stimulation and well service operations, which are ancillary to and supportive of the Company's oil and gas joint operating activities, and do not represent intercompany transactions. For the three and six months ended June 30, 2017, these vertical integration net margins included $23 million and $42 million, respectively, of revenues and $28 million and $53 million, respectively, of costs and expenses. For the same respective periods in 2016, these vertical integration net margins included $56 million and $124 million of revenues and $72 million and $153 million of costs and expenses.


(c)	Primarily represents expenses attributable to idle drilling rig fees that are not chargeable to joint operations and charges to terminate rig contracts that were not required to meet planned drilling activities.