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Capital Lease and Finance Obligations - Finance Obligations (Details) - FortisBC Energy - Natural gas distribution assets	12 Months Ended
	Dec. 31, 2016
Capital Leased Assets [Line Items]
Lease term (years)	35 years
Contract termination option (years)	17 years
Capital Leases | Minimum
Capital Leased Assets [Line Items]
Stated interest rate (percent)	6.78%
Capital Leases | Maximum
Capital Leased Assets [Line Items]
Stated interest rate (percent)	8.40%

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Lessee Leasing Arrangements, Capital Leases, Contract Termination Option

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Lessee Leasing Arrangements, Capital Leases, Term Of Contract

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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