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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Employee Benefit Plans [Abstract]

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

For the	Year ended December 31
millions of Canadian dollars	2016				2015
Change in Projected Benefit Obligation ("PBO") and Accumulated Post-retirement Benefit Obligation ("APBO")	Defined benefit pension plans		Non-pension benefit plans		Defined benefit pension plans		Non-pension benefit plans
Balance, January 1	$	1,520	$	88	$	1,470	$	102
Addition of TECO Energy, July 1, 2016		1,035		277		-		-
Service cost		35		4		22		3
Plan participant contributions		8		-		8		-
Interest cost		79		9		59		4
Plan amendments		-		2		-		(27)
Benefits paid		(94)		(16)		(61)		(6)
Actuarial losses		(2)		(12)		(15)		1
Foreign currency translation adjustment		26		6		37		11
Balance, December 31		2,607		358		1,520		88
Change in plan assets
Balance, January 1		1,300		6		1,205		5
Addition of TECO Energy, July 1, 2016		830		29		-		-
Employer contributions		49		17		23		6
Plan participant contributions		8		-		8		-
Benefits paid		(94)		(16)		(61)		(6)
Actual return on assets, net of expenses		93		2		96		-
Foreign currency translation adjustment		22		1		29		1
Balance, December 31		2,208		39		1,300		6
Funded status, end of year	$	(399)	$	(319)	$	(220)	$	(82)

Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block]

millions of Canadian dollars			2016		2015
	Defined benefit pension plans		Non-pension benefit plans		Defined benefit pension plans		Non-pension benefit plans
PBO/APBO	$	2,579	$	358	$	1,489	$	87
Fair value of plan assets		2,171		39		1,261		5
Funded status	$	(408)	$	(319)	$	(228)	$	(82)

millions of Canadian dollars	2016		2015
	Defined benefit pension plans		Defined benefit pension plans
ABO	$	2,462	$	1,424
Fair value of plan assets		2,171		1,261
Funded status	$	(291)	$	(163)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

As at						December 31
millions of Canadian dollars	2016				2015
	Defined benefit pension plans		Non-pension benefit plans		Defined benefit pension plans		Non-pension benefit plans
Current liabilities	$	(41)	$	(17)	$	(4)	$	(3)
Long-term liabilities		(367)		(302)		(224)		(79)
Other asset (non-current)		9		-		9		-
Amount included in deferred tax asset		16		(1)		19		(3)
AOCL (AOCI) and regulatory assets after-tax adjustment		620		45		330		(9)
Net amount recognized at end of year	$	237	$	(275)	$	130	$	(94)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Regulatory assets		Actuarial losses(gains)		Past service(gains) costs
millions of Canadian dollars
Defined Benefit Pension Plans
Balance, January 1, 2016	$	-	$	353	$	(4)
Amortized in current period		(9)		(42)		1
Current year addition to AOCL or regulatory assets		318		19		-
Balance, December 31, 2016	$	309	$	330	$	(3)
Non-pension benefits plans
Balance, January 1, 2016	$	-	$	15	$	(27)
Amortized in current period		-		(2)		8
Current year addition to AOCL (AOCI) or regulatory assets		48		2		-
Balance, December 31, 2016	$	48	$	15	$	(19)

	2016				2015
	Defined benefit pension plans		Non-pension benefit plans		Defined benefit pension plans		Non-pension benefit plans
Actuarial losses	$	330	$	15	$	353	$	15
Past service (gains)		(3)		(19)		(4)		(27)
Regulatory assets		309		48		-		-
Total AOCL (AOCI) and regulatory assets on a pre-tax basis		636		44		349		(12)
Amount included in deferred tax asset		(16)		1		(19)		3
Net amount in AOCL (AOCI) and regulatory assets after-tax adjustment	$	620	$	45	$	330	$	(9)

Schedule of Net Benefit Costs [Table Text Block]

As at						Year ended December 31
millions of Canadian dollars	2016				2015
	Defined benefit pension plans		Non-pension benefit plans		Defined benefit pension plans		Non-pension benefit plans
Service cost	$	35	$	4	$	22	$	3
Interest cost		79		9		59		3
Expected return on plan assets		(97)		(1)		(65)		-
Current year amortization of:
Actuarial losses		42		2		48		1
Past service costs (gains)		(1)		(8)		(1)		(6)
Regulatory assets (liability)		9		-		-		-
Total	$	67	$	6	$	63	$	1

Schedule of Allocation of Plan Assets [Table Text Block]

Canadian Pension Plans
Asset Class	Target Range at Market
Short-term securities		0%	to	5%
Fixed income		35%	to	50%
Equities:
Canadian		12%	to	22%
Non-Canadian		36%	to	50%

Non-Canadian Pension Plans
Asset Class	Target Range at MarketWeighted average
Short-term securities		0%	to	2%
Fixed income		40%	to	48%
Equities		50%	to	61%

As at				December 31, 2015
millions of Canadian dollars		NAV	Level 1		Total		Percentage
Cash and cash equivalents		-	$	12	$	12	1	%
Equity securities:
Canadian equity		-		190		190	-	%
US equity		-		240		240	18	%
Other equity		-		240		240	18	%
Other investments measured at NAV	$	619		-		619	48	%
Total	$	619	$	682	$	1,301	100	%

Asset Class	Target Range at Market
Short-term securities		10%	to	50%
Fixed income		0%	to	40%
Equities:
US		30%	to	60%
Non-US		0%	to	60%

				December 31,2016
millions of Canadian dollars	NAV		Level 1		Level 2		Total		Percentage
Cash and cash equivalents		-	$	1	$	-	$	1	3	%
Life insurance policies (1)		-		-		33		33	85	%
Other investments measured at NAV	$	5		-		-		5	12	%
Total	$	5	$	1	$	33	$	39	100	%
(1) For valuation purposes, the life insurance policies held for the NMGC retiree medical plan are valued at the cash surrender value and are considered Level 2 assets
				December 31, 2015
millions of Canadian dollars	NAV		Level 1		Level 2		Total		Percentage
Cash and cash equivalents		-	$	1	$	-	$	1	20	%
Other investments measured at NAV	$	4		-		-		4	80	%
Total	$	4	$	1	$	-	$	5	100	%

Schedule of Changes in Fair Value of Plan Assets [Table Text Block]

As at					December 31, 2016
millions of Canadian dollars	NAV		Level 1		Level 2		Total		Percentage
Cash and cash equivalents		-	$	31		-	$	31	1	%
Net in-transits		-		(42)		-		(42)	(2)	%
Equity Securities:
Canadian equity				192				192	9	%
US equity		-		303		-		303	14	%
Other equity		-		243				243	11	%
Fixed income securities:
Government		-		-	$	47		47	2	%
Corporate		-		-		53		53	2	%
Other		-		5		14		19	1	%
Open-ended investments measured at NAV (1)	$	1,132		-		-		1,132	51	%
Common collective trusts measured at NAV (2)		230		-		-		230	11	%
Total	$	1,362	$	732	$	114	$	2,208	100	%
(1) NAV investments are open-ended registered and non-registered mutual funds, collective investment trusts, or pooled funds. NAV’s are calculated daily and the funds honor subscription and redemption activity regularly.
(2) The common collective trusts are private funds valued at NAV. The NAVs are calculated based on bid prices of the underlying securities. Since the prices are not published to external sources, NAV is used as a practical expedient. Certain funds invest primarily in equity securities of domestic and foreign issuers while others invest in long duration U.S. investment grade fixed income assets and seeks to increase return through active management of interest rate and credit risks. The funds honor subscription and redemption activity regularly.

Schedule of Expected Benefit Payments [Table Text Block]

millions of Canadian dollars	Defined benefit pension plans		Non-pension benefit plans
Expected employer contributions
2017	$	117	$	25
Expected benefit payments
2017		172		22
2018		140		23
2019		150		23
2020		156		24
2021		165		25
2022 – 2026		912		130

Schedule of Assumptions Used [Table Text Block]

Assumptions
The following table shows the assumptions that have been used in accounting for defined benefit pension and other post-retirement benefit plans:
	2016				2015
(weighted average assumptions)	Defined benefit pension plans		Non-pension benefit plans		Defined benefit pension plans		Non-pension benefit plans
Benefit obligation – December 31:
Discount rate	3.96	%	4.18	%	4.02	%	4.04	%
Rate of compensation increase	2.82	%	2.54	%	3.07	%	3.50	%
Health care trend - initial (next year)	-		6.78	%	-		5.50	%
- ultimate	-		4.45	%	-		4.20	%
- year ultimate reached	-		2020		-		2020
Benefit cost for year ended December 31:
Discount rate	3.79	%	3.88	%	3.99	%	3.98	%
Expected long-term return on plan assets	6.33	%	4.43		5.91	%	-
Rate of compensation increase	2.88	%	2.56	%	3.07	%	3.50	%
Health care trend - initial (current year)	-		6.76	%	-		5.90	%
- ultimate	-		4.45	%	-		4.30	%
- year ultimate reached	-		2020		-		2020
Figures shown are weighted averages. Actual assumptions used differ by plan.

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

millions of Canadian dollars	Increase		Decrease
Service cost and interest cost	$	1	$	(1)
Accumulated post-retirement benefit obligation, December 31		20		(17)

millions of Canadian dollars	Increase		Decrease
Discount rate assumption	$	(7)	$	7
Asset rate assumption		(4)		4

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

Amounts to be Amortized in the Next Fiscal Year
The following table shows the amounts from the AOCL and regulatory assets, which are expected to be recognized as part of the net periodic benefit cost in fiscal 2017:
			2017
millions of Canadian dollars	Defined benefit pension plans		Non-pensionbenefit plans
Actuarial gains (losses)	$	(53)	$	(1)
Past service gains		1		8
Regulatory assets		(16)		3
Total	$	(68)	$	10

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- Definition

Tabular disclosure of the change in the benefit obligation, fair value of plan assets, and funded status of pension plans or other employee benefit plans.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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Tabular disclosure of accumulated benefit obligations and fair values of plan assets of pension plans and/or other employee benefit plans where the accumulated benefit obligation exceeds the fair value of plan assets.

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Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall.

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Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.

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Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits.

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Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.

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