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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2016
Debt Disclosure [Abstract] |
Schedule of Long-Term Debt |
(in millions) | Maturity Date | 2016 |  | 2015 |
Regulated Utilities |  |  |
ITC |  |  |
Secured US First Mortgage Bonds - |  |  |
| 4.81% weighted average fixed rate | 2017-2055 | $ | 1,994 |  | $ | — |
Secured US Senior Notes - |  |  |
| 4.19% weighted average fixed rate | 2040-2046 | 638 |  | — |
Unsecured US Senior Notes - |  |  |
| 4.80% weighted average fixed rate | 2017-2043 | 3,160 |  | — |
Unsecured US Shareholder Note - |  |  |
| 6.00% fixed rate (Note 27) | 2028 | 267 |  | — |
UNS Energy |  |  |
Unsecured US Tax-Exempt Bonds - 3.87% weighted |  |  |
| average fixed and variable rate (2015 - 3.83%) | 2020-2040 | 827 |  | 852 |
Unsecured US Fixed Rate Notes - |  |  |
| 4.26% weighted average fixed rate (2015 - 4.26%) | 2021-2045 | 1,511 |  | 1,557 |
Central Hudson |  |  |
Unsecured US Promissory Notes - 4.25% weighted |  |  |
| average fixed and variable rate (2015 - 4.30%) | 2017-2046 | 768 |  | 728 |
FortisBC Energy |  |  |
Secured Purchase Money Mortgages - |  |  |
| 10.30% weighted average fixed rate (2015 - 10.30%) | n/a | — |  | 200 |
Unsecured Debentures - |  |  |
| 5.24% weighted average fixed rate (2015 - 5.73%) | 2026-2047 | 2,220 |  | 1,770 |
Government loan | n/a | — |  | 5 |
FortisAlberta |  |  |
Unsecured Debentures - |  |  |
| 4.82% weighted average fixed rate (2015 - 4.95%) | 2024-2052 | 1,834 |  | 1,684 |
FortisBC Electric |  |  |
Secured Debentures - |  |  |
| 8.80% fixed rate (2015 - 8.80%) | 2023 | 25 |  | 25 |
Unsecured Debentures - |  |  |
| 5.22% weighted average fixed rate (2015 - 5.36%) | 2021-2050 | 635 |  | 660 |
Eastern Canadian |  |  |
Secured First Mortgage Sinking Fund Bonds - |  |  |
| 6.48% weighted average fixed rate (2015 - 6.72%) | 2020-2045 | 516 |  | 553 |
Secured First Mortgage Bonds - |  |  |
| 6.19% weighted average fixed rate (2015 - 7.18%) | 2018-2061 | 195 |  | 167 |
Unsecured Senior Notes - |  |  |
| 6.11% weighted average fixed rate (2015 - 6.11%) | 2018-2041 | 104 |  | 104 |
Caribbean Electric |  |  |
Unsecured US Senior Loan Notes and Bonds - 4.92% weighted |  |  |
| average fixed and variable rate (2015 - 4.89%) | 2018-2046 | 499 |  | 467 |
Corporate |  |  |
Unsecured US Senior Notes and Promissory Notes - |  |  |
| 3.43% weighted average fixed rate (2015 - 4.43%) | 2019-2044 | 4,353 |  | 1,720 |
Unsecured Debentures - |  |  |
| 6.50% weighted average fixed rate (2015 - 6.49%) | 2039 | 200 |  | 201 |
Unsecured Senior Notes - 2.85% fixed rate | 2023 | 500 |  | — |
Long-term classification of credit facility borrowings (Note 32) | 973 |  | 551 |
Total long-term debt (Note 30) |  | 21,219 |  | 11,244 |
Less: Deferred financing costs and debt discounts |  | (151 | ) | (76 | )
Less: Current installments of long-term debt |  | (251 | ) | (384 | )
|  |  | $ | 20,817 |  | $ | 10,784 |
Schedule of Repayment of Long-Term Debt | The consolidated annual requirements to meet principal repayments and maturities in each of the next five years and thereafter are as follows.
| Subsidiaries |  | Corporate |  | Total |
Year | (in millions) |  | (in millions) |  | (in millions) |
2017 | $ | 249 |  | $ | 2 |  | $ | 251 |
2018 | 929 |  | 2 |  | 931 |
2019 | 556 |  | 123 |  | 679 |
2020 | 544 |  | 181 |  | 725 |
2021 | 460 |  | 1,296 |  | 1,756 |
Thereafter | 12,963 |  | 3,914 |  | 16,877 |
| $ | 15,701 |  | $ | 5,518 |  | $ | 21,219 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, 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 210.5-02.22) -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 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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