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COMMITMENTS, CONTINGENCIES, AND ENVIRONMENTAL MATTERS COMMITMENTS. CONTINGENCIES, AND ENVIRONMENTAL MATTERS (Tables)
 9 Months Ended
Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
TEP COMMITMENTS
 
Purchase Commitments
 
2013
2014
2015
2016
2017
Thereafter
Total
 
Millions of Dollars
Purchased Power, Including Renewable PPA(1)
$
2

$
18

$
6

$
4

$
4

$
58

$
92

Capital Lease Obligations(2)
—

—

46

—

—

—

46

RES Performance-Based Incentives(3)
1

1

1

1

1

7

12

Fuel Transportation(4)
4

5

5

5

5

1

25

   Total Purchase Commitments
$
7

$
24

$
58

$
10

$
10

$
66

$
175

(1)
Purchased Power costs are recoverable from customers through the PPFAC. A portion of the Renewable Power Purchase Agreement (PPA) is recoverable through the PPFAC, with the balance recoverable through the RES tariff.
(2)
In the third and fourth quarters of 2013, TEP entered into agreements to purchase certain Springerville Unit 1 leased interests. See Note 5.
(3)
The RES Performance-Based Incentive (PBI) costs are recoverable through the RES tariff.
(4)
Fuel Transportation costs are recoverable from customers through the PPFAC.