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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
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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%

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- 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 + Details
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- 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 + Details
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