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Asset Retirement Obligations Asset Retirement Obligations (Tables)

12 Months Ended

Sep. 30, 2020

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation Activity

Asset Retirement Obligation Activity
			Nuclear						Non-Nuclear						Total
Balance at September 30, 2018			$	2,989					$	1,790					$	4,779
Settlements			(7)						(82)						(89)
Revisions in estimate			—						50						50
Additional obligations			18						—						18
Gallatin CCR			—						672						672
Accretion (recorded as regulatory asset)			136						50						186
Balance at September 30, 2019			3,136						2,480						5,616			(1)
Settlements			(1)						(113)						(114)
Revisions in estimate			—						1,077						1,077
Accretion (recorded as regulatory asset)			143						63						206
Balance at September 30, 2020			$	3,278					$	3,507					$	6,785		(1)

Note

(1) Includes $345 million and $163 million at September 30, 2020 and 2019, respectively, in Current liabilities.

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- References

No definition available.

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- Definition

Tabular disclosure of the carrying amount of a liability for asset retirement obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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