COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments

As of December 31, 2016, TEP had the following firm, non-cancellable, minimum purchase obligations and operating leases:

(in millions)	2017		2018		2019		2020		2021		Thereafter		Total
Fuel, Including Transportation	$	100	$	76	$	76	$	67	$	43	$	269	$	631
Purchased Power	32		—		—		—		—		—		32
Transmission	18		19		19		8		4		10		78
Renewable Power Purchase Agreements	64		64		64		63		63		730		1,048
RES Performance-Based Incentives	8		8		8		8		8		59		99
Operating Leases:
Land Easements and Rights-of-Way	1		1		1		1		2		75		81
Other	1		1		1		1		1		4		9
Total Purchase Commitments	$	224	$	169	$	169	$	148	$	121	$	1,147	$	1,978