Summary Of Significant Accounting Policies [Line Items]

Name:	te_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix:	te
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Cost of electricity purchased as well as fuel used to generate electricity used in operations and sold during the reporting period.

+ References

+ Details

Name:	us-gaap_CostOfPurchasedPower
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Revenue earned during the period from consideration (often a percentage of the franchisee's sales) received for the right to operate a business using the entity's name, merchandise, services, methodologies, promotional support, marketing, and supplies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 952

-SubTopic 605

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6490812&loc=d3e68564-108043

+ Details

Name:	us-gaap_FranchiseRevenue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax.

+ References

+ Details

Name:	us-gaap_TaxesExcludingIncomeAndExciseTaxes
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount due for services rendered or products shipped, but not yet billed, recognized in conformity with revenue recognition criteria. This element is distinct from unbilled contracts receivables because this is based on noncontract transactions.

+ Details

Name:	us-gaap_UnbilledReceivablesCurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Summary Of Significant Accounting Policies (Details) (USD $) In Millions	3 Months Ended		9 Months Ended						3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Unbilled Revenues [Member]	Dec. 31, 2010 Unbilled Revenues [Member]	Sep. 30, 2011 Tampa Electric Co [Member] Unbilled Revenues [Member]	Dec. 31, 2010 Tampa Electric Co [Member] Unbilled Revenues [Member]	Sep. 30, 2011 Franchise Fees And Gross Receipts [Member]	Sep. 30, 2010 Franchise Fees And Gross Receipts [Member]	Sep. 30, 2011 Franchise Fees And Gross Receipts [Member]	Sep. 30, 2010 Franchise Fees And Gross Receipts [Member]	Sep. 30, 2011 Tampa Electric Co [Member] Franchise Fees And Gross Receipts [Member]	Sep. 30, 2010 Tampa Electric Co [Member] Franchise Fees And Gross Receipts [Member]	Sep. 30, 2011 Tampa Electric Co [Member] Franchise Fees And Gross Receipts [Member]	Sep. 30, 2010 Tampa Electric Co [Member] Franchise Fees And Gross Receipts [Member]	Sep. 30, 2011 Tampa Electric Co [Member]	Sep. 30, 2010 Tampa Electric Co [Member]	Sep. 30, 2011 Tampa Electric Co [Member]	Sep. 30, 2010 Tampa Electric Co [Member]
Summary Of Significant Accounting Policies [Line Items]
Unbilled revenues					$ 58.1	$ 65.5	$ 58.1	$ 65.5
Franchise fees and gross receipts taxes	28.8	31.0	84.3	90.0													28.8	31.0	84.3	90.0
Taxes, other than income	57.0	57.4	171.2	174.1					28.8	31.1	84.3	89.9	28.8	31.1	84.3	89.9	45.9	47.4	137.4	141.9
Purchased power	$ 32.1	$ 45.2	$ 103.2	$ 151.5													$ 32.1	$ 45.2	$ 103.2	$ 151.5