XML 112 R89.htm IDEA: XBRL DOCUMENT v3.24.2

Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	$ 2,830	$ 2,664	$ 8,654	$ 8,551
Electric revenue	(2,828)	(2,662)	(8,651)	(8,542)
Off System Sales of Electricity	2	2	6	9
Pre-commercial Ops - capitalized revenue	0	0	(3)	0
Unregulated Operating Revenue	49	34	144	121
Regulated and Unregulated Operating Revenue	$ 2,879	2,698	$ 8,798	$ 8,672
Total long duration contract revenue recognition	2,596		7,925
Percent of wholesale Credit offered			310.00%
Percent of Generation Flexibility Credit			5.00%
NES's % of operating revenues			800.00%	800.00%
Percent of Generation Flexibility Credit			5.00%
MLGW's % of operating revenues			800.00%	800.00%
ALABAMA
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	$ 409	388	$ 1,274	$ 1,244
GEORGIA
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	65	59	214	207
KENTUCKY
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	179	172	557	562
MISSISSIPPI
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	277	263	816	814
NORTH CAROLINA
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	19	17	70	67
TENNESSEE
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	1,869	1,754	5,685	5,613
VIRGINIA
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue	$ 10	$ 9	$ 35	$ 35

X

- Definition

Revenue from sales of electricity

+ References

No definition available.

+ Details

Name:	tve_Electricrevenue
Namespace Prefix:	tve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

MLGW's % of operating revenues

+ References

No definition available.

+ Details

Name:	tve_MLGWsofoperatingrevenues
Namespace Prefix:	tve_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

NES's % of operating revenues

+ References

No definition available.

+ Details

Name:	tve_NESsOfOperatingRevenues
Namespace Prefix:	tve_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Off System Sales of Electricity

+ References

No definition available.

+ Details

Name:	tve_OffSystemSalesofElectricity
Namespace Prefix:	tve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Percent of Generation Flexibility Credit

+ References

No definition available.

+ Details

Name:	tve_PercentOfGenerationFlexibilityCredit
Namespace Prefix:	tve_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percent of wholesale Credit offered

+ References

No definition available.

+ Details

Name:	tve_PercentOfWholesaleCreditOffered
Namespace Prefix:	tve_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Pre-commercial Ops - capitalized revenue

+ References

No definition available.

+ Details

Name:	tve_PreCommercialOpsCapitalizedRevenue
Namespace Prefix:	tve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Total long duration contract revenue recognition

+ References

No definition available.

+ Details

Name:	tve_Totallongdurationcontractrevenuerecognition
Namespace Prefix:	tve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total amount of operating revenues recognized during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_RegulatedAndUnregulatedOperatingRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The total amount of regulated operating revenues recognized during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_RegulatedOperatingRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of unregulated operating revenues recognized during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_UnregulatedOperatingRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_AL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_GA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_KY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_MS
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_NC
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_TN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_VA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: