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Commitments and Contingencies Commitments and Contingencies (Tables)

12 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

At September 30, 2016, the amounts of contractual cash commitments maturing in each of the next five years and beyond are shown below:

Commitments and Contingencies Payments due in the years ending September 30
		2017				2018				2019				2020				2021				Thereafter				Total
Membership interests of variable interest entity subject to mandatory redemption		$	2			$	2			$	2			$	3			$	3			$	23			$	35
Lease obligations
Capital(1)		51				51				50				50				50				564				816
Non-cancelable operating(2)		43				32				25				25				25				13				163
Purchase obligations
Power(3)		254				265				266				246				244				1,541				2,816
Fuel(4)		1,312				917				569				324				327				1,006				4,455
Other(5)		88				65				58				47				34				604				896
Unfunded loan commitments		9				4				—				—				—				—				13
Payments on other financings		76				76				75				73				207				26				533
Total		$	1,835			$	1,412			$	1,045			$	768			$	890			$	3,777			$	9,727

Notes

(1) Includes the interest component of capital leases based on the interest rates stated in the lease agreements and excludes certain related executory costs. Minimum commitments related to executory costs are included in purchase obligations.

(2) Does not include purchased power agreements that are accounted for as operating leases and included in power purchase obligations.

(3) Includes commitments for energy and/or capacity under power purchase agreements from coal-fired, hydroelectric, diesel, and gas-fired facilities, as well as  transmission service agreements to support purchases of power from the market and wind power purchase agreements.

(4) Includes commitments to purchase nuclear fuel, coal, and natural gas, as well as related transportation and storage services.

(5) Primarily includes long-term service contracts, contracts that contain minimum purchase levels for the purchase of limestone along with related storage and transportation, and contractual obligations related to load control programs.

Energy Prepayment Obligations

Energy Prepayment Obligations Payments due in the years ending September 30
		2017				2018				2019				2020				2021				Thereafter				Total
Energy prepayment obligations		$	100			$	100			$	10			$	—			$	—			$	—			$	210
Interest payments relating to energy prepayment obligations		46				46				4				—				—				—				96
Total		$	146			$	146			$	14			$	—			$	—			$	—			$	306

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- Definition

Tabular disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet and the combined aggregate amount of maturities of known contractual obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 303
-Paragraph a
-Subparagraph 5

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Tabular disclosure of information about obligations resulting from other commitments.

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