Imperial Oil Limited (IMO) 10-Q 1 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2017shares
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	IMO
Entity Registrant Name	IMPERIAL OIL LTD
Entity Central Index Key	49,938
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	837,581,329

Consolidated statement of incom

Consolidated statement of income - CAD CAD in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016
Revenues and other income
Operating revenues	[1]	CAD 7,134	[2]	CAD 6,568	[2]	CAD 21,077	[3]	CAD 17,967	[3]
Investment and other income (note 3)		24		874		270		945
Total revenues and other income		7,158		7,442		21,347		18,912
Expenses
Exploration		7		16		29		75
Purchases of crude oil and products	[4]	4,251		3,857		13,226		10,884
Production and manufacturing	[5]	1,338		1,261		4,238		3,842
Selling and general	[5]	219		275		626		812
Federal excise tax		438		434		1,253		1,237
Depreciation and depletion		391		398		1,135		1,229
Financing costs (note 5)		18		19		49		52
Total expenses		6,662		6,260		20,556		18,131
Income (loss) before income taxes		496		1,182		791		781
Income taxes		125		179		164		60
Net income (loss)		CAD 371		CAD 1,003		CAD 627		CAD 721
Per-share information (Canadian dollars)
Net income (loss) per common share - basic (note 8)		CAD 0.44		CAD 1.18		CAD 0.74		CAD 0.85
Net income (loss) per common share - diluted (note 8)		0.44		1.18		0.74		0.85
Dividends per common share		CAD 0.16		CAD 0.15		CAD 0.47		CAD 0.44
[1]	Amounts from related parties included in operating revenues. 756 448 2,801 1,457
[2]	Included export sales to the United States of $1,080 million (2016 - $941 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[3]	Included export sales to the United States of $3,024 million (2016 - $2,704 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[4]	Amounts to related parties included in purchases of crude oil and products. 604 623 1,919 1,540
[5]	Amounts to related parties included in production and manufacturing, and selling and general expenses. 127 133 415 394

Consolidated statement of inco3

Consolidated statement of income (Parenthetical) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Amounts from related parties included in operating revenues	CAD 756	CAD 448	CAD 2,801	CAD 1,457
Amounts to related parties included in purchases of crude oil and products	604	623	1,919	1,540
Amounts to related parties included in production and manufacturing, and selling and general expenses	CAD 127	CAD 133	CAD 415	CAD 394

Consolidated statement of compr

Consolidated statement of comprehensive income - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss)	CAD 371	CAD 1,003	CAD 627	CAD 721
Other comprehensive income (loss), net of income taxes
Post-retirement benefits liability adjustment (excluding amortization)			41	100
Amortization of post-retirement benefits liability adjustment included in net periodic benefit costs	34	34	106	108
Total other comprehensive income (loss)	34	34	147	208
Comprehensive income (loss)	CAD 405	CAD 1,037	CAD 774	CAD 929

Consolidated balance sheet

Consolidated balance sheet - CAD CAD in Millions		Sep. 30, 2017		Dec. 31, 2016
Current assets
Cash		CAD 833	[1]	CAD 391
Accounts receivable, less estimated doubtful accounts	[2]	1,896		2,023
Inventories of crude oil and products		989		949
Materials, supplies and prepaid expenses		441		468
Total current assets		4,159		3,831
Investments and long-term receivables		931		1,030
Property, plant and equipment,		53,844		53,515
less accumulated depreciation and depletion		(18,248)		(17,182)
Property, plant and equipment, net		35,596		36,333
Goodwill		186		186
Other assets, including intangibles, net		498		274
Total assets		41,370		41,654
Current liabilities
Notes and loans payable	[3]	202		202
Accounts payable and accrued liabilities (note 7)	[2]	3,041		3,193
Income taxes payable		59		488
Total current liabilities		3,302		3,883
Long-term debt (note 6)	[4]	5,013		5,032
Other long-term obligations (note 7)	[5]	3,698		3,656
Deferred income tax liabilities		4,336		4,062
Total liabilities		16,349		16,633
Shareholders' equity
Common shares at stated value (note 8)	[6]	1,547		1,566
Earnings reinvested (note 9)		25,224		25,352
Accumulated other comprehensive income (loss) (note 10)		(1,750)		(1,897)
Total shareholders' equity		25,021		25,021
Total liabilities and shareholders' equity		CAD 41,370		CAD 41,654
[1]	Cash is composed of cash in bank and cash equivalents at cost. Cash equivalents are all highly liquid securities with maturity of three months or less when purchased.
[2]	Accounts receivable, less estimated doubtful accounts included net amounts receivable from related parties of $87 million (2016 - $172 million).
[3]	Notes and loans payable included amounts to related parties of $75 million (2016 - $75 million).
[4]	Long-term debt included amounts to related parties of $4,447 million (2016 - $4,447 million).
[5]	Other long-term obligations included amounts to related parties of $71 million (2016 - $104 million).
[6]	Number of common shares authorized and outstanding were 1,100 million and 838 million, respectively (2016 - 1,100 million and 848 million, respectively).

Consolidated balance sheet (Par

Consolidated balance sheet (Parenthetical) - CAD CAD in Millions	Sep. 30, 2017	Dec. 31, 2016
Amounts receivable (payable) from (to) related parties	CAD 87	CAD 172
Due to related parties, current	CAD 75	CAD 75
Common shares authorized	1,100,000,000	1,100,000,000
Common shares outstanding	837,581,000	847,599,000
Long-term debt
Due to related parties	CAD 4,447	CAD 4,447
Other long-term obligations
Due to related parties	CAD 71	CAD 104

Consolidated statement of cash

Consolidated statement of cash flows - CAD CAD in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income (loss)		CAD 371	CAD 1,003	CAD 627	CAD 721
Adjustments for non-cash items:
Depreciation and depletion		391	398	1,135	1,229
(Gain) loss on asset sales (note 3)	[1],[2]	(6)	(909)	(219)	(952)
Deferred income taxes and other		131	215	294	35
Changes in operating assets and liabilities:
Accounts receivable		(297)	275	127	(121)
Inventories, materials, supplies and prepaid expenses		104	(7)	(13)	112
Income taxes payable		19	(13)	(429)
Accounts payable and accrued liabilities		81	(241)	(159)	(59)
All other items - net	[3]	43	51	320	299
Cash flows from (used in) operating activities		837	772	1,683	1,264
Investing activities
Additions to property, plant and equipment		(241)	(189)	(683)	(893)
Proceeds from asset sales (note 3)		8	1,194	230	1,244
Additional investments		(1)		(1)	(1)
Cash flows from (used in) investing activities		(234)	1,005	(454)	350
Financing activities
Short-term debt - net			(1,591)		(1,679)
Long-term debt - additions (note 6)					495
Reduction in capitalized lease obligations (note 6)		(7)	(6)	(20)	(21)
Dividends paid		(136)	(127)	(390)	(364)
Common shares purchased (note 8)		(250)		(377)
Cash flows from (used in) financing activities		(393)	(1,724)	(787)	(1,569)
Increase (decrease) in cash		210	53	442	45
Cash at beginning of period		623	195	391	203
Cash at end of period	[4]	CAD 833	CAD 248	CAD 833	CAD 248
[1]	The nine months ended September 30, 2017 included a gain of $174 million ($151 million after tax) for the sale of a surplus property in Ontario.
[2]	Third quarter and nine months ended September 30, 2016, included gains of $0.8 billion ($0.7 billion, after tax) from the sale of company-owned Esso retail sites in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland.
[3]	Included contribution to registered pension plans. (78 ) (44 ) (176 ) (120 )
[4]	Cash is composed of cash in bank and cash equivalents at cost. Cash equivalents are all highly liquid securities with maturity of three months or less when purchased.

Consolidated statement of cash8

Consolidated statement of cash flows (Parenthetical) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Included contribution to registered pension plans	CAD (78)	CAD (44)	CAD (176)	CAD (120)

Basis of financial statement pr

Basis of financial statement preparation	9 Months Ended
	Sep. 30, 2017
Basis of financial statement preparation	1. Basis of financial statement preparation These unaudited consolidated financial statements have been prepared in accordance with Generally Accepted Accounting Principles of the United States of America (GAAP) and follow the same accounting policies and methods of computation as, and should be read in conjunction with, the most recent annual consolidated financial statements filed with the U.S. Securities and Exchange Commission (SEC) in the company’s 2016 annual report on Form 10-K. The company’s exploration and production activities are accounted for under the “successful efforts” method. The results for the nine months ended September 30, 2017, are not necessarily indicative of the operations to be expected for the full year. All amounts are in Canadian dollars unless otherwise indicated.

Business segments

Business segments	9 Months Ended
	Sep. 30, 2017
Business segments	2. Business segments Third Quarter Upstream Downstream Chemical millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) 1,668 1,316 5,204 4,971 262 281 Intersegment sales 587 709 241 253 62 58 Investment and other income (note 3) 7 1 15 870 - 1 2,262 2,026 5,460 6,094 324 340 Expenses Exploration 7 16 - - - - Purchases of crude oil and products 947 861 4,014 3,827 179 188 Production and manufacturing 893 887 394 323 51 51 Selling and general 5 (1 ) 167 238 19 22 Federal excise tax - - 438 434 - - Depreciation and depletion 330 346 53 46 3 2 Financing costs (note 5) 1 (2 ) - - - - Total expenses 2,183 2,107 5,066 4,868 252 263 Income (loss) before income taxes 79 (81 ) 394 1,226 72 77 Income taxes 17 (55 ) 102 224 20 21 Net income (loss) 62 (26 ) 292 1,002 52 56 Cash flows from (used in) operating activities 479 432 268 264 99 73 Capital and exploration expenditures (b 92 149 55 38 5 7 Third Quarter Corporate and Other Eliminations Consolidated millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) - - - - 7,134 6,568 Intersegment sales - - (890 ) (1,020 ) - - Investment and other income (note 3) 2 2 - - 24 874 2 2 (890 ) (1,020 ) 7,158 7,442 Expenses Exploration - - - - 7 16 Purchases of crude oil and products - - (889 ) (1,019 ) 4,251 3,857 Production and manufacturing - - - - 1,338 1,261 Selling and general 29 17 (1 ) (1 ) 219 275 Federal excise tax - - - - 438 434 Depreciation and depletion 5 4 - - 391 398 Financing costs (note 5) 17 21 - - 18 19 Total expenses 51 42 (890 ) (1,020 ) 6,662 6,260 Income (loss) before income taxes (49 ) (40 ) - - 496 1,182 Income taxes (14 ) (11 ) - - 125 179 Net income (loss) (35 ) (29 ) - - 371 1,003 Cash flows from (used in) operating activities (9 ) 3 - - 837 772 Capital and exploration expenditures (b) 7 11 - - 159 205 (a) Included export sales to the United States of $1,080 million (2016 - $941 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment. (b) Capital and exploration expenditures (CAPEX) include exploration expenses, additions to property, plant and equipment, additions to capital leases, additional investments and acquisitions. Nine Months to September 30 Upstream Downstream Chemical millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) 5,166 3,699 15,087 13,470 824 798 Intersegment sales 1,494 1,516 792 689 191 156 Investment and other income (note 3) 17 22 248 919 (1 ) 1 6,677 5,237 16,127 15,078 1,014 955 Expenses Exploration 29 75 - - - - Purchases of crude oil and products 3,089 2,584 12,037 10,139 573 518 Production and manufacturing 2,917 2,634 1,169 1,059 152 149 Selling and general 1 (3 ) 540 729 60 63 Federal excise tax - - 1,253 1,237 - - Depreciation and depletion 964 1,053 148 158 9 6 Financing costs (note 5) 5 (6 ) - - - - Total expenses 7,005 6,337 15,147 13,322 794 736 Income (loss) before income taxes (328 ) (1,100 ) 980 1,756 220 219 Income taxes (103 ) (336 ) 230 363 59 59 Net income (loss) (225 ) (764 ) 750 1,393 161 160 Cash flows from (used in) operating activities 904 32 626 1,028 176 205 Capital and exploration expenditures (b) 286 745 128 145 12 21 Total assets as at September 30 35,387 36,975 4,671 4,403 365 379 Nine Months to September 30 Corporate and Other Eliminations Consolidated millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) - - - - 21,077 17,967 Intersegment sales - - (2,477 ) (2,361 ) - - Investment and other income (note 3) 6 3 - - 270 945 6 3 (2,477 ) (2,361 ) 21,347 18,912 Expenses Exploration - - - - 29 75 Purchases of crude oil and products - - (2,473 ) (2,357 ) 13,226 10,884 Production and manufacturing - - - - 4,238 3,842 Selling and general 29 27 (4 ) (4 ) 626 812 Federal excise tax - - - - 1,253 1,237 Depreciation and depletion 14 12 - - 1,135 1,229 Financing costs (note 5) 44 58 - - 49 52 Total expenses 87 97 (2,477 ) (2,361 ) 20,556 18,131 Income (loss) before income taxes (81 ) (94 ) - - 791 781 Income taxes (22 ) (26 ) - - 164 60 Net income (loss) (59 ) (68 ) - - 627 721 Cash flows from (used in) operating activities (23 ) (1 ) - - 1,683 1,264 Capital and exploration expenditures (b) 29 37 - - 455 948 Total assets as at September 30 1,283 674 (336 ) (337 ) 41,370 42,094 (a) Included export sales to the United States of $3,024 million (2016 - $2,704 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment. (b) Capital and exploration expenditures (CAPEX) include exploration expenses, additions to property, plant and equipment, additions to capital leases, additional investments and acquisitions.

Investment and other income

Investment and other income	9 Months Ended
	Sep. 30, 2017
Investment and other income	3. Investment and other income Investment and other income included gains and losses on asset sales as follows: Third Quarter Nine Months to September 30 millions of Canadian dollars 2017 2016 2017 2016 Proceeds from asset sales 8 1,194 230 1,244 Book value of asset sales 2 285 12 292 Gain (loss) on asset sales, before tax (a) (b) 6 909 219 952 Gain (loss) on asset sales, after tax (a) (b) 5 774 191 808 (a) The nine months ended September 30, 2017 included a gain of $174 million ($151 million after tax) for the sale of a surplus property in Ontario. (b) Third quarter and nine months ended September 30, 2016, included gains of $0.8 billion ($0.7 billion, after tax) from the sale of company-owned Esso retail sites in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland.

Employee retirement benefits

Employee retirement benefits	9 Months Ended
	Sep. 30, 2017
Employee retirement benefits	4. Employee retirement benefits The components of net benefit cost were as follows: Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Pension benefits: Current service cost 54 50 163 152 Interest cost 77 82 235 240 Expected return on plan assets (104 ) (101 ) (306 ) (300 ) Amortization of prior service cost 2 2 7 7 Amortization of actuarial loss (gain) 43 39 132 121 Net periodic benefit cost 72 72 231 220 Other post-retirement benefits: Current service cost 4 4 12 12 Interest cost 6 7 18 20 Amortization of actuarial loss (gain) 2 3 6 10 Net periodic benefit cost 12 14 36 42

Financing costs and additional

Financing costs and additional notes and loans payable information	9 Months Ended
	Sep. 30, 2017
Financing costs and additional notes and loans payable information	5. Financing costs and additional notes and loans payable information Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Debt-related interest 24 32 73 95 Capitalized interest (7) (11) (29) (37) Net interest expense 17 21 44 58 Other interest 1 (2) 5 (6) Total financing costs 18 19 49 52

Long-term debt

Long-term debt	9 Months Ended
	Sep. 30, 2017
Long-term debt	6. Long-term debt As at As at millions of Canadian dollars 2017 2016 Long-term debt 4,447 4,447 Capital leases 566 585 Total long-term debt 5,013 5,032

Other long-term obligations

Other long-term obligations	9 Months Ended
	Sep. 30, 2017
Other long-term obligations	7. Other long-term obligations As at As at millions of Canadian dollars 2017 2016 Employee retirement benefits (a) 1,410 1,645 Asset retirement obligations and other environmental liabilities (b) 1,577 1,544 Share-based incentive compensation liabilities 138 139 Other obligations 573 328 Total other long-term obligations 3,698 3,656 (a) Total recorded employee retirement benefits obligations also included $58 million in current liabilities (2016 - $58 million). (b) Total asset retirement obligations and other environmental liabilities also included $108 million in current liabilities (2016 - $108 million).

Common shares

Common shares	9 Months Ended
	Sep. 30, 2017
Common shares	8. Common shares As of As of thousands of shares 2017 2016 Authorized 1,100,000 1,100,000 Common shares outstanding 837,581 847,599 From 1995 through September 2017, the company had a series of 12-month The current 12-month year Purchased shares Millions of 1995 - 2015 906,544 15,708 2016 - Third quarter - - - Full year 1 - 2017 - Third quarter 6,732 250 - Year-to-date 10,018 377 Cumulative purchase to date 916,563 16,085 The excess of the purchase cost over the stated value of shares purchased has been recorded as a distribution of earnings reinvested. The following table provides the calculation of net income per common share: Nine Months Third Quarter to September 30 2017 2016 2017 2016 Net income (loss) per common share - basic Net income (loss) (millions of Canadian dollars) 371 1,003 627 721 Weighted average number of common shares outstanding (millions of shares) 841.8 847.6 845.5 847.6 Net income (loss) per common share (dollars) 0.44 1.18 0.74 0.85 Net income (loss) per common share - diluted Net income (loss) (millions of Canadian dollars) 371 1,003 627 721 Weighted average number of common shares outstanding (millions of shares) 841.8 847.6 845.5 847.6 Effect of employee share-based awards (millions of shares) 3.1 3.2 2.9 3.0 Weighted average number of common shares outstanding, assuming dilution (millions of shares) 844.9 850.8 848.4 850.6 Net income (loss) per common share (dollars) 0.44 1.18 0.74 0.85

Earnings reinvested

Earnings reinvested	9 Months Ended
	Sep. 30, 2017
Earnings reinvested	9. Earnings reinvested Nine Months Third Quarter to September 30 millions of Canadian dollars 2017 2016 2017 2016 Earnings reinvested at beginning of period 25,224 23,160 25,352 23,687 Net income (loss) for the period 371 1,003 627 721 Share purchases in excess of stated value (237 ) - (358 ) - Dividends declared (134 ) (127 ) (397 ) (373 ) Earnings reinvested at end of period 25,224 24,036 25,224 24,036

Other comprehensive income (los

Other comprehensive income (loss) information	9 Months Ended
	Sep. 30, 2017
Other comprehensive income (loss) information	10. Other comprehensive income (loss) information Changes in accumulated other comprehensive income (loss): millions of Canadian dollars 2017 2016 Balance at January 1 (1,897 ) (1,828 ) Post-retirement benefits liability adjustment: Current period change excluding amounts reclassified from accumulated other comprehensive 41 100 Amounts reclassified from accumulated other comprehensive income 106 108 Balance at September 30 (1,750 ) (1,620 ) Amounts reclassified out of accumulated other comprehensive income (loss) - before-tax Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Amortization of post-retirement benefits liability adjustment (47 ) (44 ) (145 ) (138 ) (a) This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4). Income tax expense (credit) for components of other comprehensive income (loss): Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Post-retirement benefits liability adjustments: Post-retirement benefits liability adjustment (excluding amortization) - - 16 37 Amortization of post-retirement benefits liability adjustment included in 13 10 39 30 Total 13 10 55 67

Recently issued accounting stan

Recently issued accounting standards	9 Months Ended
	Sep. 30, 2017
Recently issued accounting standards	11. Recently issued accounting standards In May 2014, the Financial Accounting Standards Board (FASB) issued a new standard, Revenue from Contracts with Customers In February 2016, the FASB issued a new standard , Leases In March 2017, the FASB issued an Accounting Standards Update 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost Non-service

Business segments (Tables)

Business segments (Tables)	9 Months Ended
	Sep. 30, 2017
Business Segments	Third Quarter Upstream Downstream Chemical millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) 1,668 1,316 5,204 4,971 262 281 Intersegment sales 587 709 241 253 62 58 Investment and other income (note 3) 7 1 15 870 - 1 2,262 2,026 5,460 6,094 324 340 Expenses Exploration 7 16 - - - - Purchases of crude oil and products 947 861 4,014 3,827 179 188 Production and manufacturing 893 887 394 323 51 51 Selling and general 5 (1 ) 167 238 19 22 Federal excise tax - - 438 434 - - Depreciation and depletion 330 346 53 46 3 2 Financing costs (note 5) 1 (2 ) - - - - Total expenses 2,183 2,107 5,066 4,868 252 263 Income (loss) before income taxes 79 (81 ) 394 1,226 72 77 Income taxes 17 (55 ) 102 224 20 21 Net income (loss) 62 (26 ) 292 1,002 52 56 Cash flows from (used in) operating activities 479 432 268 264 99 73 Capital and exploration expenditures (b 92 149 55 38 5 7 Third Quarter Corporate and Other Eliminations Consolidated millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) - - - - 7,134 6,568 Intersegment sales - - (890 ) (1,020 ) - - Investment and other income (note 3) 2 2 - - 24 874 2 2 (890 ) (1,020 ) 7,158 7,442 Expenses Exploration - - - - 7 16 Purchases of crude oil and products - - (889 ) (1,019 ) 4,251 3,857 Production and manufacturing - - - - 1,338 1,261 Selling and general 29 17 (1 ) (1 ) 219 275 Federal excise tax - - - - 438 434 Depreciation and depletion 5 4 - - 391 398 Financing costs (note 5) 17 21 - - 18 19 Total expenses 51 42 (890 ) (1,020 ) 6,662 6,260 Income (loss) before income taxes (49 ) (40 ) - - 496 1,182 Income taxes (14 ) (11 ) - - 125 179 Net income (loss) (35 ) (29 ) - - 371 1,003 Cash flows from (used in) operating activities (9 ) 3 - - 837 772 Capital and exploration expenditures (b) 7 11 - - 159 205 (a) Included export sales to the United States of $1,080 million (2016 - $941 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment. (b) Capital and exploration expenditures (CAPEX) include exploration expenses, additions to property, plant and equipment, additions to capital leases, additional investments and acquisitions. Nine Months to September 30 Upstream Downstream Chemical millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) 5,166 3,699 15,087 13,470 824 798 Intersegment sales 1,494 1,516 792 689 191 156 Investment and other income (note 3) 17 22 248 919 (1 ) 1 6,677 5,237 16,127 15,078 1,014 955 Expenses Exploration 29 75 - - - - Purchases of crude oil and products 3,089 2,584 12,037 10,139 573 518 Production and manufacturing 2,917 2,634 1,169 1,059 152 149 Selling and general 1 (3 ) 540 729 60 63 Federal excise tax - - 1,253 1,237 - - Depreciation and depletion 964 1,053 148 158 9 6 Financing costs (note 5) 5 (6 ) - - - - Total expenses 7,005 6,337 15,147 13,322 794 736 Income (loss) before income taxes (328 ) (1,100 ) 980 1,756 220 219 Income taxes (103 ) (336 ) 230 363 59 59 Net income (loss) (225 ) (764 ) 750 1,393 161 160 Cash flows from (used in) operating activities 904 32 626 1,028 176 205 Capital and exploration expenditures (b) 286 745 128 145 12 21 Total assets as at September 30 35,387 36,975 4,671 4,403 365 379 Nine Months to September 30 Corporate and Other Eliminations Consolidated millions of Canadian dollars 2017 2016 2017 2016 2017 2016 Revenues and other income Operating revenues (a) - - - - 21,077 17,967 Intersegment sales - - (2,477 ) (2,361 ) - - Investment and other income (note 3) 6 3 - - 270 945 6 3 (2,477 ) (2,361 ) 21,347 18,912 Expenses Exploration - - - - 29 75 Purchases of crude oil and products - - (2,473 ) (2,357 ) 13,226 10,884 Production and manufacturing - - - - 4,238 3,842 Selling and general 29 27 (4 ) (4 ) 626 812 Federal excise tax - - - - 1,253 1,237 Depreciation and depletion 14 12 - - 1,135 1,229 Financing costs (note 5) 44 58 - - 49 52 Total expenses 87 97 (2,477 ) (2,361 ) 20,556 18,131 Income (loss) before income taxes (81 ) (94 ) - - 791 781 Income taxes (22 ) (26 ) - - 164 60 Net income (loss) (59 ) (68 ) - - 627 721 Cash flows from (used in) operating activities (23 ) (1 ) - - 1,683 1,264 Capital and exploration expenditures (b) 29 37 - - 455 948 Total assets as at September 30 1,283 674 (336 ) (337 ) 41,370 42,094 (a) Included export sales to the United States of $3,024 million (2016 - $2,704 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment. (b) Capital and exploration expenditures (CAPEX) include exploration expenses, additions to property, plant and equipment, additions to capital leases, additional investments and acquisitions.

Investment and other income (Ta

Investment and other income (Tables)	9 Months Ended
	Sep. 30, 2017
Gains and Losses on Asset Sales	Investment and other income included gains and losses on asset sales as follows: Third Quarter Nine Months to September 30 millions of Canadian dollars 2017 2016 2017 2016 Proceeds from asset sales 8 1,194 230 1,244 Book value of asset sales 2 285 12 292 Gain (loss) on asset sales, before tax (a) (b) 6 909 219 952 Gain (loss) on asset sales, after tax (a) (b) 5 774 191 808 (a) The nine months ended September 30, 2017 included a gain of $174 million ($151 million after tax) for the sale of a surplus property in Ontario. (b) Third quarter and nine months ended September 30, 2016, included gains of $0.8 billion ($0.7 billion, after tax) from the sale of company-owned Esso retail sites in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland.

Employee retirement benefits (T

Employee retirement benefits (Tables)	9 Months Ended
	Sep. 30, 2017
Schedule of Components of Net Benefit Cost	The components of net benefit cost were as follows: Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Pension benefits: Current service cost 54 50 163 152 Interest cost 77 82 235 240 Expected return on plan assets (104 ) (101 ) (306 ) (300 ) Amortization of prior service cost 2 2 7 7 Amortization of actuarial loss (gain) 43 39 132 121 Net periodic benefit cost 72 72 231 220 Other post-retirement benefits: Current service cost 4 4 12 12 Interest cost 6 7 18 20 Amortization of actuarial loss (gain) 2 3 6 10 Net periodic benefit cost 12 14 36 42

Financing costs and additiona23

Financing costs and additional notes and loans payable information (Tables)	9 Months Ended
	Sep. 30, 2017
Financing Costs and Additional Notes and Loans Payable Information	Third Quarter NineMonths millions of Canadian dollars 2017 2016 2017 2016 Debt-related interest 24 32 73 95 Capitalized interest (7) (11) (29) (37) Net interest expense 17 21 44 58 Other interest 1 (2) 5 (6) Total financing costs 18 19 49 52

Long-term debt (Tables)

Long-term debt (Tables)	9 Months Ended
	Sep. 30, 2017
Long-Term Debt	As at As at millions of Canadian dollars 2017 2016 Long-term debt 4,447 4,447 Capital leases 566 585 Total long-term debt 5,013 5,032

Other long-term obligations (Ta

Other long-term obligations (Tables)	9 Months Ended
	Sep. 30, 2017
Other Long-Term Obligations	As at As at millions of Canadian dollars 2017 2016 Employee retirement benefits (a) 1,410 1,645 Asset retirement obligations and other environmental liabilities (b) 1,577 1,544 Share-based incentive compensation liabilities 138 139 Other obligations 573 328 Total other long-term obligations 3,698 3,656 (a) Total recorded employee retirement benefits obligations also included $58 million in current liabilities (2016 - $58 million). (b) Total asset retirement obligations and other environmental liabilities also included $108 million in current liabilities (2016 - $108 million).

Common shares (Tables)

Common shares (Tables)	9 Months Ended
	Sep. 30, 2017
Summary of Common Shares	As of As of thousands of shares 2017 2016 Authorized 1,100,000 1,100,000 Common shares outstanding 837,581 847,599
Schedule of Stock Repurchased	The results of these activities are as shown below: year Purchased shares Millions of 1995 - 2015 906,544 15,708 2016 - Third quarter - - - Full year 1 - 2017 - Third quarter 6,732 250 - Year-to-date 10,018 377 Cumulative purchase to date 916,563 16,085
Calculation of Basic and Diluted Earnings Per Share	The following table provides the calculation of net income per common share: Nine Months Third Quarter to September 30 2017 2016 2017 2016 Net income (loss) per common share - basic Net income (loss) (millions of Canadian dollars) 371 1,003 627 721 Weighted average number of common shares outstanding (millions of shares) 841.8 847.6 845.5 847.6 Net income (loss) per common share (dollars) 0.44 1.18 0.74 0.85 Net income (loss) per common share - diluted Net income (loss) (millions of Canadian dollars) 371 1,003 627 721 Weighted average number of common shares outstanding (millions of shares) 841.8 847.6 845.5 847.6 Effect of employee share-based awards (millions of shares) 3.1 3.2 2.9 3.0 Weighted average number of common shares outstanding, assuming dilution (millions of shares) 844.9 850.8 848.4 850.6 Net income (loss) per common share (dollars) 0.44 1.18 0.74 0.85

Earnings reinvested (Tables)

Earnings reinvested (Tables)	9 Months Ended
	Sep. 30, 2017
Summary of Earnings Reinvested	Nine Months Third Quarter to September 30 millions of Canadian dollars 2017 2016 2017 2016 Earnings reinvested at beginning of period 25,224 23,160 25,352 23,687 Net income (loss) for the period 371 1,003 627 721 Share purchases in excess of stated value (237 ) - (358 ) - Dividends declared (134 ) (127 ) (397 ) (373 ) Earnings reinvested at end of period 25,224 24,036 25,224 24,036

Other comprehensive income (l28

Other comprehensive income (loss) information (Tables)	9 Months Ended
	Sep. 30, 2017
Changes in Accumulated Other Comprehensive Income (Loss)	Changes in accumulated other comprehensive income (loss): millions of Canadian dollars 2017 2016 Balance at January 1 (1,897 ) (1,828 ) Post-retirement benefits liability adjustment: Current period change excluding amounts reclassified from accumulated other comprehensive 41 100 Amounts reclassified from accumulated other comprehensive income 106 108 Balance at September 30 (1,750 ) (1,620 )
Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) - Before-Tax Income (Expense)	Amounts reclassified out of accumulated other comprehensive income (loss) - before-tax Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Amortization of post-retirement benefits liability adjustment (47 ) (44 ) (145 ) (138 ) (a) This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).
Income Tax Expense (Credit) for Components of Other Comprehensive Income (Loss)	Income tax expense (credit) for components of other comprehensive income (loss): Third Quarter Nine Months millions of Canadian dollars 2017 2016 2017 2016 Post-retirement benefits liability adjustments: Post-retirement benefits liability adjustment (excluding amortization) - - 16 37 Amortization of post-retirement benefits liability adjustment included in 13 10 39 30 Total 13 10 55 67

Business Segments (Detail)

Business Segments (Detail) - CAD CAD in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016		Dec. 31, 2016
Revenues and other income
Operating revenues	[1]	CAD 7,134	[2]	CAD 6,568	[2]	CAD 21,077	[3]	CAD 17,967	[3]
Investment and other income (note 3)		24		874		270		945
Total revenues and other income		7,158		7,442		21,347		18,912
Expenses
Exploration		7		16		29		75
Purchases of crude oil and products	[4]	4,251		3,857		13,226		10,884
Production and manufacturing	[5]	1,338		1,261		4,238		3,842
Selling and general	[5]	219		275		626		812
Federal excise tax		438		434		1,253		1,237
Depreciation and depletion		391		398		1,135		1,229
Financing costs (note 5)		18		19		49		52
Total expenses		6,662		6,260		20,556		18,131
Income (loss) before income taxes		496		1,182		791		781
Income taxes		125		179		164		60
Net income (loss)		371		1,003		627		721
Cash flows from (used in) operating activities		837		772		1,683		1,264
Capital and exploration expenditures	[6]	159		205		455		948
Total assets		41,370		42,094		41,370		42,094		CAD 41,654
Consolidation, Eliminations
Revenues and other income
Intersegment sales		(890)		(1,020)		(2,477)		(2,361)
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME		(890)		(1,020)		(2,477)		(2,361)
Expenses
Purchases of crude oil and products		(889)		(1,019)		(2,473)		(2,357)
Selling and general		(1)		(1)		(4)		(4)
Total expenses		(890)		(1,020)		(2,477)		(2,361)
Total assets		(336)		(337)		(336)		(337)
Upstream
Revenues and other income
Operating revenues		1,668	[2]	1,316	[2]	5,166	[3]	3,699	[3]
Intersegment sales		587		709		1,494		1,516
Investment and other income (note 3)		7		1		17		22
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME		2,262		2,026		6,677		5,237
Expenses
Exploration		7		16		29		75
Purchases of crude oil and products		947		861		3,089		2,584
Production and manufacturing		893		887		2,917		2,634
Selling and general		5		(1)		1		(3)
Depreciation and depletion		330		346		964		1,053
Financing costs (note 5)		1		(2)		5		(6)
Total expenses		2,183		2,107		7,005		6,337
Income (loss) before income taxes		79		(81)		(328)		(1,100)
Income taxes		17		(55)		(103)		(336)
Net income (loss)		62		(26)		(225)		(764)
Cash flows from (used in) operating activities		479		432		904		32
Capital and exploration expenditures	[6]	92		149		286		745
Total assets		35,387		36,975		35,387		36,975
Downstream
Revenues and other income
Operating revenues		5,204	[2]	4,971	[2]	15,087	[3]	13,470	[3]
Intersegment sales		241		253		792		689
Investment and other income (note 3)		15		870		248		919
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME		5,460		6,094		16,127		15,078
Expenses
Purchases of crude oil and products		4,014		3,827		12,037		10,139
Production and manufacturing		394		323		1,169		1,059
Selling and general		167		238		540		729
Federal excise tax		438		434		1,253		1,237
Depreciation and depletion		53		46		148		158
Total expenses		5,066		4,868		15,147		13,322
Income (loss) before income taxes		394		1,226		980		1,756
Income taxes		102		224		230		363
Net income (loss)		292		1,002		750		1,393
Cash flows from (used in) operating activities		268		264		626		1,028
Capital and exploration expenditures	[6]	55		38		128		145
Total assets		4,671		4,403		4,671		4,403
Chemical
Revenues and other income
Operating revenues		262	[2]	281	[2]	824	[3]	798	[3]
Intersegment sales		62		58		191		156
Investment and other income (note 3)				1		(1)		1
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME		324		340		1,014		955
Expenses
Purchases of crude oil and products		179		188		573		518
Production and manufacturing		51		51		152		149
Selling and general		19		22		60		63
Depreciation and depletion		3		2		9		6
Total expenses		252		263		794		736
Income (loss) before income taxes		72		77		220		219
Income taxes		20		21		59		59
Net income (loss)		52		56		161		160
Cash flows from (used in) operating activities		99		73		176		205
Capital and exploration expenditures	[6]	5		7		12		21
Total assets		365		379		365		379
Corporate and Other
Revenues and other income
Investment and other income (note 3)		2		2		6		3
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME		2		2		6		3
Expenses
Selling and general		29		17		29		27
Depreciation and depletion		5		4		14		12
Financing costs (note 5)		17		21		44		58
Total expenses		51		42		87		97
Income (loss) before income taxes		(49)		(40)		(81)		(94)
Income taxes		(14)		(11)		(22)		(26)
Net income (loss)		(35)		(29)		(59)		(68)
Cash flows from (used in) operating activities		(9)		3		(23)		(1)
Capital and exploration expenditures	[6]	7		11		29		37
Total assets		CAD 1,283		CAD 674		CAD 1,283		CAD 674
[1]	Amounts from related parties included in operating revenues. 756 448 2,801 1,457
[2]	Included export sales to the United States of $1,080 million (2016 - $941 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[3]	Included export sales to the United States of $3,024 million (2016 - $2,704 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[4]	Amounts to related parties included in purchases of crude oil and products. 604 623 1,919 1,540
[5]	Amounts to related parties included in production and manufacturing, and selling and general expenses. 127 133 415 394
[6]	Capital and exploration expenditures (CAPEX) include exploration expenses, additions to property, plant and equipment, additions to capital leases, additional investments and acquisitions.

Business Segments (Parenthetica

Business Segments (Parenthetical) (Detail) - CAD CAD in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016
Segment Reporting Information [Line Items]
Operating revenues	[1]	CAD 7,134	[2]	CAD 6,568	[2]	CAD 21,077	[3]	CAD 17,967	[3]
United States Exports
Segment Reporting Information [Line Items]
Operating revenues		CAD 1,080		CAD 941		CAD 3,024		CAD 2,704
[1]	Amounts from related parties included in operating revenues. 756 448 2,801 1,457
[2]	Included export sales to the United States of $1,080 million (2016 - $941 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[3]	Included export sales to the United States of $3,024 million (2016 - $2,704 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.

Gains and Losses on Asset Sales

Gains and Losses on Asset Sales (Detail) - CAD CAD in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investment And Other Income [Line Items]
Proceeds from asset sales		CAD 8	CAD 1,194	CAD 230	CAD 1,244
Book value of asset sales		2	285	12	292
Gain (loss) on asset sales, before tax	[1],[2]	6	909	219	952
Gain (loss) on asset sales, after tax	[1],[2]	CAD 5	CAD 774	CAD 191	CAD 808
[1]	The nine months ended September 30, 2017 included a gain of $174 million ($151 million after tax) for the sale of a surplus property in Ontario.
[2]	Third quarter and nine months ended September 30, 2016, included gains of $0.8 billion ($0.7 billion, after tax) from the sale of company-owned Esso retail sites in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland.

Gains and Losses on Asset Sal32

Gains and Losses on Asset Sales (Parenthetical) (Detail) - CAD CAD in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investment And Other Income [Line Items]
Gain (loss) on asset sales, before tax	[1],[2]	CAD 6	CAD 909	CAD 219	CAD 952
Gain (loss) on asset sales, after tax	[1],[2]	CAD 5	774	191	808
Surplus Property
Investment And Other Income [Line Items]
Gain (loss) on asset sales, before tax				174
Gain (loss) on asset sales, after tax				CAD 151
Esso Retail Sites
Investment And Other Income [Line Items]
Gain (loss) on asset sales, before tax			800		800
Gain (loss) on asset sales, after tax			CAD 700		CAD 700
[1]	The nine months ended September 30, 2017 included a gain of $174 million ($151 million after tax) for the sale of a surplus property in Ontario.
[2]	Third quarter and nine months ended September 30, 2016, included gains of $0.8 billion ($0.7 billion, after tax) from the sale of company-owned Esso retail sites in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland.

Components of Net Periodic Bene

Components of Net Periodic Benefit Cost (Detail) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Current service cost	CAD 54	CAD 50	CAD 163	CAD 152
Interest cost	77	82	235	240
Expected return on plan assets	(104)	(101)	(306)	(300)
Amortization of prior service cost	2	2	7	7
Amortization of actuarial loss (gain)	43	39	132	121
Net periodic benefit cost	72	72	231	220
Other post-retirement benefits
Defined Benefit Plan Disclosure [Line Items]
Current service cost	4	4	12	12
Interest cost	6	7	18	20
Amortization of actuarial loss (gain)	2	3	6	10
Net periodic benefit cost	CAD 12	CAD 14	CAD 36	CAD 42

Financing Costs and Additiona34

Financing Costs and Additional Notes and Loans Payable Information (Detail) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Debt-related interest	CAD 24	CAD 32	CAD 73	CAD 95
Capitalized interest	(7)	(11)	(29)	(37)
Net interest expense	17	21	44	58
Other interest	1	(2)	5	(6)
Total financing costs	CAD 18	CAD 19	CAD 49	CAD 52

Long-Term Debt (Detail)

Long-Term Debt (Detail) - CAD CAD in Millions		Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt		CAD 4,447	CAD 4,447
Capital leases		566	585
Total long-term debt	[1]	CAD 5,013	CAD 5,032
[1]	Long-term debt included amounts to related parties of $4,447 million (2016 - $4,447 million).

Other Long-Term Obligations (De

Other Long-Term Obligations (Detail) - CAD CAD in Millions		Sep. 30, 2017	Dec. 31, 2016
Schedule of Other Liabilities [Line Items]
Employee retirement benefits	[1]	CAD 1,410	CAD 1,645
Asset retirement obligations and other environmental liabilities	[2]	1,577	1,544
Share-based incentive compensation liabilities		138	139
Other obligations		573	328
Total other long-term obligations	[3]	CAD 3,698	CAD 3,656
[1]	Total recorded employee retirement benefits obligations also included $58 million in current liabilities (2016 - $58 million).
[2]	Total asset retirement obligations and other environmental liabilities also included $108 million in current liabilities (2016 - $108 million).
[3]	Other long-term obligations included amounts to related parties of $71 million (2016 - $104 million).

Other Long-Term Obligations (Pa

Other Long-Term Obligations (Parenthetical) (Detail) - CAD CAD in Millions	Sep. 30, 2017	Dec. 31, 2016
Schedule of Other Liabilities [Line Items]
Employee retirement benefit obligations in current liabilities	CAD 58	CAD 58
Asset retirement obligations and other environmental liabilities in current liabilities	CAD 108	CAD 108

Summary of Common Shares (Detai

Summary of Common Shares (Detail) - shares	Sep. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Authorized	1,100,000,000	1,100,000,000
Common shares outstanding	837,581,000	847,599,000

Common Shares - Additional Info

Common Shares - Additional Information (Detail) - shares	9 Months Ended
	Sep. 30, 2017	Jun. 13, 2017
Class of Stock [Line Items]
Normal course issuer bid share repurchase term, months	12 months
Cumulative purchases to date, shares	916,563,000
Exxon Mobil Corporation's ownership interest in Imperial	69.60%
Normal course issuer bid share repurchase shares authorized	25,395,927
Percent of total shares		3.00%

Schedule of Stock Repurchased (

Schedule of Stock Repurchased (Detail) - CAD shares in Thousands, CAD in Millions	3 Months Ended	9 Months Ended	12 Months Ended	240 Months Ended	261 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2017
Equity, Class of Treasury Stock [Line Items]
Cumulative purchase to date, shares		916,563
Common Stock
Equity, Class of Treasury Stock [Line Items]
Cumulative purchase to date, shares	6,732	10,018	1	906,544	916,563
Cumulative purchases to date, value	CAD 250	CAD 377		CAD 15,708	CAD 16,085

Net Income (Loss) Per Share (De

Net Income (Loss) Per Share (Detail) - CAD CAD / shares in Units, shares in Millions, CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income (loss) per common share - basic
Net income (loss)	CAD 371	CAD 1,003	CAD 627	CAD 721
Weighted average number of common shares outstanding (millions of shares)	841.8	847.6	845.5	847.6
Net income (loss) per common share (dollars)	CAD 0.44	CAD 1.18	CAD 0.74	CAD 0.85
Net income (loss) per common share - diluted
Net income (loss)	CAD 371	CAD 1,003	CAD 627	CAD 721
Weighted average number of common shares outstanding (millions of shares)	841.8	847.6	845.5	847.6
Effect of employee share-based awards (millions of shares)	3.1	3.2	2.9	3
Weighted average number of common shares outstanding, assuming dilution (millions of shares)	844.9	850.8	848.4	850.6
Net income (loss) per common share (dollars)	CAD 0.44	CAD 1.18	CAD 0.74	CAD 0.85

Summary of Earnings Reinvested

Summary of Earnings Reinvested (Detail) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Retained Earnings Adjustments [Line Items]
Earnings reinvested at beginning of period	CAD 25,224	CAD 23,160	CAD 25,352	CAD 23,687
Net income (loss) for the period	371	1,003	627	721
Share purchases in excess of stated value	(237)		(358)
Dividends declared	(134)	(127)	(397)	(373)
Earnings reinvested at end of period	CAD 25,224	CAD 24,036	CAD 25,224	CAD 24,036

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at January 1			CAD (1,897)	CAD (1,828)
Current period change excluding amounts reclassified from accumulated other comprehensive income			41	100
Amounts reclassified from accumulated other comprehensive income	CAD 34	CAD 34	106	108
Balance at September 30	CAD (1,750)	CAD (1,620)	CAD (1,750)	CAD (1,620)

Amounts Reclassified Out of Acc

Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) (Detail) - CAD CAD in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost	[1]	CAD (47)	CAD (44)	CAD (145)	CAD (138)
[1]	This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).

Income Tax Expense (Credit) for

Income Tax Expense (Credit) for Components of Other Comprehensive Income (Loss) (Detail) - CAD CAD in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Post-retirement benefits liability adjustment (excluding amortization)			CAD 16	CAD 37
Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost	CAD 13	CAD 10	39	30
Total	CAD 13	CAD 10	CAD 55	CAD 67