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Short Term Debt (Short-term debt and the related weighted-average interest rates) (Details) - CAD	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Short-term Debt	CAD 961,000,000	CAD 16,000,000
Short-term Debt, Weighted Average Interest Rate	1.73%	2.70%
TECO Energy Inc. and TECO Finance Inc. [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short-term Debt	CAD 685,000,000	CAD 0
Short-term Debt, Weighted Average Interest Rate	1.74%	0.00%
Tampa Electric Division [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short-term Debt	CAD 228,000,000	CAD 0
Short-term Debt, Weighted Average Interest Rate	1.49%	0.00%
New Mexico Gas Company [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short-term Debt	CAD 35,000,000	CAD 0
Short-term Debt, Weighted Average Interest Rate	1.71%	0.00%
Nova Scotia Power Inc. [Member] | Notes Payable to Banks [Member]
Short-term Debt [Line Items]
Short-term Debt	CAD 1,000,000	CAD 16,000,000
Short-term Debt, Weighted Average Interest Rate	2.70%	2.70%
Grand Bahama Power Company Limited [Member] | Notes Payable to Banks [Member]
Short-term Debt [Line Items]
Short-term Debt	CAD 12,000,000	CAD 0
Short-term Debt, Weighted Average Interest Rate	5.75%	0.00%
Emera Energy Services [Member] | Line of Credit [Member]
Short-term Debt [Line Items]
Short-term Debt	CAD 0	CAD 0
Short-term Debt, Weighted Average Interest Rate	0.00%	0.00%

X

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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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

No definition available.

+ Details

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X

- Definition

Weighted average interest rate of short-term debt outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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