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Supplemental Cash Flow Information	12 Months Ended
	Sep. 30, 2018
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Interest paid was $1.2 billion for 2018 and $1.3 billion for both 2017 and 2016. These amounts differ from interest expense in certain years due to the timing of payments and interest capitalized for major capital expenditures. There was no interest capitalized in 2018 or 2017 and $235 million capitalized in 2016 as part of the Watts Bar Unit 2 construction. Construction in progress and Nuclear fuel expenditures included in Accounts payable and accrued liabilities at September 30, 2018, 2017, and 2016 were $372 million, $425 million, and $526 million, respectively, and are excluded from the Statements of Consolidated Cash Flows for the years ended September 30, 2018, 2017 and 2016 as non-cash investing activities.  Excluded from the Statement of Consolidated Cash Flows for the years ended September 30, 2017 and 2016 as non-cash financing activities were capital lease obligations incurred related to purchase power assets of $10 million and $81 million, respectively. There were no capital leases incurred during 2018. Also excluded from the Statement of Consolidated Cash Flows for the years ended September 30, 2017 and 2016 were $74 million and $78 million, respectively, of notes payable related to TVA's acquisition of equity interests in certain SPEs. See Note 9.      Cash flows from futures contracts, forward contracts, option contracts, and swap contracts that are accounted for as hedges are classified in the same category as the item being hedged or on a basis consistent with the nature of the instrument.

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- Definition

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-URI http://asc.fasb.org/topic&trid=2134446

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- References

No definition available.

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