Imperial Oil Limited (IMO) 10-Q 5 Nov 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014
Document Information [Line Items]	'
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Sep-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q3
Trading Symbol	'IMO
Entity Registrant Name	'IMPERIAL OIL LTD
Entity Central Index Key	'0000049938
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Large Accelerated Filer
Entity Common Stock, Shares Outstanding	847,599,011

Consolidated_Statement_Of_Inco

Consolidated Statement Of Income (U.S. GAAP) (CAD)	3 Months Ended				9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
REVENUES AND OTHER INCOME	'		'		'		'
Operating revenues	9,641	[1],[2],[3]	8,577	[1],[2],[3]	28,237	[1],[2],[4]	24,470	[1],[2],[4]
Investment and other income (note 3)	17		17		696		96
TOTAL REVENUES AND OTHER INCOME	9,658		8,594		28,933		24,566
EXPENSES	'		'		'		'
Exploration	14		30		52		74
Purchases of crude oil and products	6,100	[5]	5,484	[5]	17,677	[5]	15,460	[5]
Production and manufacturing	1,358	[6]	1,325	[6]	4,224	[6],[7]	3,974	[6],[7]
Selling and general	254		291		825		797
Federal excise tax	412	[2]	385	[2]	1,165	[2]	1,041	[2]
Depreciation and depletion	276		223		836	[7]	860	[7]
Financing costs (note 5)	-1		-1		3		1
TOTAL EXPENSES	8,413		7,737		24,782		22,207
INCOME BEFORE INCOME TAXES	1,245		857		4,151		2,359
INCOME TAXES	309		210		1,037		587
NET INCOME	936		647		3,114		1,772
PER SHARE INFORMATION (Canadian dollars)	'		'		'		'
Net income per common share - basic (note 8)	1.1		0.76		3.67		2.09
Net income per common share - diluted (note 8)	1.1		0.76		3.66		2.08
Dividends per common share	0.13		0.12		0.39		0.36
[1]	Amounts from related parties included in operating revenues 1,201 711 2,759 1,936
[2]	Federal excise tax included in operating revenues 412 385 1,165 1,041
[3]	Included export sales to the United States of $2,092 million (2013 - $1,380 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[4]	Included export sales to the United States of $4,888 million (2013 - $4,071 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[5]	Amounts to related parties included in purchases of crude oil and products 1,111 1,018 2,939 3,544
[6]	Amounts to related parties included in production and manufacturing expenses 93 85 268 255
[7]	A second quarter 2013 charge in the Downstream segment of $355 million ($264 million, after-tax) associated with the company's decision to convert the Dartmouth refinery to a terminal included the write-down of refinery plant and equipment not included in the terminal conversion of $245 million, reported as part of depreciation and depletion expenses, and decommissioning, environmental and employee-related costs of $110 million, reported as part of production and manufacturing expenses. Amounts incurred related to the project at the end of the third quarter 2014 associated with decommissioning, environmental and employee-related costs were $79 million.

Consolidated_Statement_Of_Inco1

Consolidated Statement Of Income (U.S. GAAP) (Parenthetical) (CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Federal excise tax included in operating revenues	412	[1]	385	[1]	1,165	[1]	1,041	[1]
Amounts from related parties included in operating revenues	1,201		711		2,759		1,936
Amounts to related parties included in purchases of crude oil and products	1,111		1,018		2,939		3,544
Amounts to related parties included in production and manufacturing expenses	93		85		268		255
[1]	Federal excise tax included in operating revenues 412 385 1,165 1,041

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (U.S. GAAP) (CAD)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
NET INCOME	936	647	3,114	1,772
Other comprehensive income, net of income taxes	'	'	'	'
Post-retirement benefit liability adjustment (excluding amortization)	'	'	-38	-102
Amortization of post-retirement benefit liability adjustment included in net periodic benefit costs	34	52	109	154
Total other comprehensive income/(loss)	34	52	71	52
Comprehensive income	970	699	3,185	1,824

Consolidated_Balance_Sheet_US_

Consolidated Balance Sheet (U.S. GAAP) (CAD)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Current assets	'		'
Cash	43		272
Accounts receivable, less estimated doubtful accounts	2,301	[1]	2,084	[1]
Inventories of crude oil and products	1,107		1,030
Materials, supplies and prepaid expenses	396		342
Deferred income tax assets	618		559
Total current assets	4,465		4,287
Long-term receivables, investments and other long-term assets	1,379		1,332
Property, plant and equipment,	49,263		47,165
less accumulated depreciation and depletion	-15,141		-15,845
Property, plant and equipment, net	34,122		31,320
Goodwill	224		224
Other intangible assets, net	52		55
TOTAL ASSETS	40,242		37,218
Current liabilities	'		'
Notes and loans payable	1,759	[2]	1,843	[2]
Accounts payable and accrued liabilities (note 7)	4,571	[1]	4,518	[1]
Income taxes payable	698		727
Total current liabilities	7,028		7,088
Long-term debt (note 6)	4,443	[3]	4,444	[3]
Other long-term obligations (note 7)	2,817		3,091
Deferred income tax liabilities	3,575		3,071
TOTAL LIABILITIES	17,863		17,694
SHAREHOLDERS' EQUITY	'		'
Common shares at stated value	1,566	[4]	1,566	[4]
Earnings reinvested	22,463		19,679
Accumulated other comprehensive income (note 9)	-1,650		-1,721
TOTAL SHAREHOLDERS' EQUITY	22,379		19,524
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	40,242		37,218
[1]	Accounts receivable, less estimated doubtful accounts included amounts receivable from related parties of $79 million (2013 - accounts payable and accrued liabilities included amounts payable to related parties of $170 million).
[2]	Notes and loans payable included amounts to related parties of $75 million (2013 - $75 million).
[3]	Long-term debt included amounts to related parties of $4,316 million (2013 - $4,316 million).
[4]	Number of common shares authorized and outstanding were 1,100 million and 848 million, respectively (2013 - 1,100 million and 848 million, respectively).

Consolidated_Balance_Sheet_US_1

Consolidated Balance Sheet (U.S. GAAP) (Parenthetical) (CAD)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Due to related parties, current	75	75
Amounts (payable) receivable from related parties	79	-170
Due to related parties, noncurrent	4,316	4,316
Common shares authorized	1,100	1,100
Common shares outstanding	848	848

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (U.S. GAAP) (CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
OPERATING ACTIVITIES	'		'		'		'
NET INCOME	936		647		3,114		1,772
Adjustments for non-cash items:	'		'		'		'
Depreciation and depletion	276		223		836	[1]	860	[1]
(Gain)/loss on asset sales (note 3)	-4	[2]	-5	[2]	-664	[2]	-60	[2]
Deferred income taxes and other	185		106		411		276
Changes in operating assets and liabilities:	'		'		'		'
Accounts receivable	104		51		-217		-166
Inventories, materials, supplies and prepaid expenses	42		46		-131		-451
Income taxes payable	-12		-485		-29		-607
Accounts payable and accrued liabilities	-216		-226		-20		282
All other items - net	-81	[3]	-59	[3]	14	[3]	-273	[3]
CASH FLOWS FROM (USED IN) OPERATING ACTIVITIES	1,230		298		3,314		1,633
INVESTING ACTIVITIES	'		'		'		'
Additions to property, plant and equipment	-1,351		-1,810		-3,852		-4,771
Acquisition	'		'		'		-1,602
Proceeds from asset sales	7	[2]	6	[2]	814	[2]	68	[2]
Additional investments	-35		'		-79		'
Repayment of loan from equity company	'		'		'		4
CASH FLOWS FROM (USED IN) INVESTING ACTIVITIES	-1,379		-1,804		-3,117		-6,301
FINANCING ACTIVITIES	'		'		'		'
Short-term debt - net	135		325		-88		1,359
Long-term debt issued	'		819		'		3,213
Reduction in capitalized lease obligations	-3		-2		-7		-5
Dividends paid	-111		-102		-331		-305
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES	21		1,040		-426		4,262
INCREASE (DECREASE) IN CASH	-128		-466		-229		-406
CASH AT BEGINNING OF PERIOD	171		542		272		482
CASH AT END OF PERIOD	43		76		43		76
[1]	A second quarter 2013 charge in the Downstream segment of $355 million ($264 million, after-tax) associated with the company's decision to convert the Dartmouth refinery to a terminal included the write-down of refinery plant and equipment not included in the terminal conversion of $245 million, reported as part of depreciation and depletion expenses, and decommissioning, environmental and employee-related costs of $110 million, reported as part of production and manufacturing expenses. Amounts incurred related to the project at the end of the third quarter 2014 associated with decommissioning, environmental and employee-related costs were $79 million.
[2]	The nine months ended September 30, 2014 included gains of $638 million ($478 million, after tax) from the sale of the company's interest in producing conventional assets located in Boundary Lake, Cynthia/West Pembina and Rocky Mountain House.
[3]	Included contribution to registered pension plans (95 ) (163) (267 ) (461)

Consolidated_Statement_of_Cash1

Consolidated Statement of Cash Flows (U.S. GAAP) (Parenthetical) (CAD)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Included contribution to registered pension plans	-95	-163	-267	-461

Basis_of_financial_statement_p

Basis of financial statement preparation	9 Months Ended
	Sep. 30, 2014
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 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 in the company’s 2013 Annual Report on Form 10-K. In the opinion of the company, the information furnished herein reflects all known accruals and adjustments necessary for a fair statement of the results for the periods reported herein. All such adjustments are of a normal recurring nature. The company’s exploration and production activities are accounted for under the “successful efforts” method.
	The results for the nine months ended September 30, 2014, 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, 2014
Business segments	'
	2	Business segments
	Third Quarter		Upstream					Downstream					Chemical
	millions of dollars		2014			2013		2014			2013		2014			2013
	REVENUES AND OTHER INCOME
	Operating revenues (a)			2,365			1,786		6,912			6,469		364			322
	Intersegment sales			1,077			1,397		318			415		93			96
	Investment and other income			2			8		14			9		—			—
				3,444			3,191		7,244			6,893		457			418
	EXPENSES
	Exploration			14			30		—			—		—			—
	Purchases of crude oil and products			1,590			1,307		5,701			5,789		296			295
	Production and manufacturing			917			880		389			396		52			50
	Selling and general			(1	)		1		234			217		17			17
	Federal excise tax			—			—		412			385		—			—
	Depreciation and depletion			219			168		52			50		3			3
	Financing costs			(1	)		—		—			(1)		—			—
	TOTAL EXPENSES			2,738			2,386		6,788			6,836		368			365
	INCOME BEFORE INCOME TAXES			706			805		456			57		89			53
	INCOME TAXES			174			201		113			11		23			14
	NET INCOME			532			604		343			46		66			39
	Cash flows from (used in) operating activities			1,072			601		114			(315)		77			7
	CAPEX (b)			1,280			1,765		127			51		7			3
	Third Quarter		Corporate and Other					Eliminations					Consolidated
	millions of dollars		2014			2013		2014			2013		2014			2013
	REVENUES AND OTHER INCOME
	Operating revenues (a)			—			—		—			—		9,641			8,577
	Intersegment sales			—			—		(1,488	)		(1,908)		—			—
	Investment and other income			1			—		—			—		17			17
				1			—		(1,488	)		(1,908)		9,658			8,594
	EXPENSES
	Exploration			—			—		—			—		14			30
	Purchases of crude oil and products			—			—		(1,487	)		(1,907)		6,100			5,484
	Production and manufacturing			—			—		—			(1)		1,358			1,325
	Selling and general			5			56		(1	)		—		254			291
	Federal excise tax			—			—		—			—		412			385
	Depreciation and depletion			2			2		—			—		276			223
	Financing costs			—			—		—			—		(1	)		(1)
	TOTAL EXPENSES			7			58		(1,488	)		(1,908)		8,413			7,737
	INCOME BEFORE INCOME TAXES			(6	)		(58)		—			—		1,245			857
	INCOME TAXES			(1	)		(16)		—			—		309			210
	NET INCOME			(5	)		(42)		—			—		936			647
	Cash flows from (used in) operating activities			(33	)		5		—			—		1,230			298
	CAPEX (b)			20			21		—			—		1,434			1,840
	(a)	Included export sales to the United States of $2,092 million (2013 - $1,380 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, equipment and intangibles, additions to capital leases, additional investments and acquisition.
	Nine Months to September 30		Upstream					Downstream					Chemical
	millions of dollars		2014			2013		2014			2013		2014			2013
	REVENUES AND OTHER INCOME
	Operating revenues (a)			6,671			4,392		20,458			19,120		1,108			958
	Intersegment sales			3,188			3,344		1,118			1,603		310			240
	Investment and other income			658			55		34			39		—			—
				10,517			7,791		21,610			20,762		1,418			1,198
	EXPENSES
	Exploration			52			74		—			—		—			—
	Purchases of crude oil and products			4,425			3,030		16,898			16,788		966			826
	Production and manufacturing (c)			2,933			2,508		1,125			1,312		166			157
	Selling and general			2			4		658			651		53			49
	Federal excise tax			—			—		1,165			1,041		—			—
	Depreciation and depletion (c)			657			443		162			401		9			9
	Financing costs			3			—		—			1		—			—
	TOTAL EXPENSES			8,072			6,059		20,008			20,194		1,194			1,041
	INCOME BEFORE INCOME TAXES			2,445			1,732		1,602			568		224			157
	INCOME TAXES			604			431		405			141		58			41
NET INCOME			1,841			1,301		1,197			427		166			116
Cash flows from (used in) operating activities			2,062			1,065		1,074			420		154			122
CAPEX (b)			3,680			6,272		310			128		15			6
Total assets as at September 30			33,799			29,693		6,027			6,159		381			374
Nine Months to September 30		Corporate and Other					Eliminations					Consolidated
millions of dollars		2014			2013		2014			2013		2014			2013
REVENUES AND OTHER INCOME
Operating revenues (a)			—			—		—			—		28,237			24,470
Intersegment sales			—			—		(4,616	)		(5,187)		—			—
Investment and other income			4			2		—			—		696			96
			4			2		(4,616	)		(5,187)		28,933			24,566
EXPENSES
Exploration			—			—		—			—		52			74
Purchases of crude oil and products			—			—		(4,612	)		(5,184)		17,677			15,460
Production and manufacturing (c)			—			—		—			(3)		4,224			3,974
Selling and general			116			93		(4	)		—		825			797
Federal excise tax			—			—		—			—		1,165			1,041
Depreciation and depletion (c)			8			7		—			—		836			860
Financing costs			—			—		—			—		3			1
TOTAL EXPENSES			124			100		(4,616	)		(5,187)		24,782			22,207
INCOME BEFORE INCOME TAXES			(120	)		(98)		—			—		4,151			2,359
INCOME TAXES			(30	)		(26)		—			—		1,037			587
NET INCOME			(90	)		(72)		—			—		3,114			1,772
Cash flows from (used in) operating activities			24			26		—			—		3,314			1,633
CAPEX (b)			61			47		—			—		4,066			6,453
Total assets as at September 30			426			364		(391	)		(509)		40,242			36,081
(a)	Included export sales to the United States of $4,888 million (2013 - $4,071 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, equipment and intangibles, additions to capital leases, additional investments and acquisition.
(c)	A second quarter 2013 charge in the Downstream segment of $355 million ($264 million, after-tax) associated with the company’s decision to convert the Dartmouth refinery to a terminal included the write-down of refinery plant and equipment not included in the terminal conversion of $245 million, reported as part of depreciation and depletion expenses, and decommissioning, environmental and employee-related costs of $110 million, reported as part of production and manufacturing expenses. Amounts incurred related to the project at the end of the third quarter 2014 associated with decommissioning, environmental and employee-related costs were $79 million.

Investment_and_other_income

Investment and other income	9 Months Ended
	Sep. 30, 2014
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 dollars		2014		2013		2014		2013
	Proceeds from asset sales (a)			7		6		814		68
	Book value of assets sold			3		1		150		8
	Gain/(loss) on asset sales, before tax (a)			4		5		664		60
	Gain/(loss) on asset sales, after tax (a)			2		5		498		46
	(a)	The nine months ended September 30, 2014 included gains of $638 million ($478 million, after tax) from the sale of the company’s interest in producing conventional assets located in Boundary Lake, Cynthia/West Pembina and Rocky Mountain House.

Employee_retirement_benefits

Employee retirement benefits	9 Months Ended
	Sep. 30, 2014
Employee retirement benefits	'
	4	Employee retirement benefits
	The components of net benefit cost were as follows:
			Third Quarter				Nine Months
							to September 30
	millions of dollars		2014		2013		2014		2013
	Pension benefits:
	Current service cost			37		46		114		136
	Interest cost			82		71		241		211
	Expected return on plan assets			(95)		(85)		(277)		(248)
	Amortization of prior service cost			6		6		17		17
	Amortization of actuarial loss			39		61		125		182
	Net benefit cost			69		99		220		298
	Other post-retirement benefits:
	Current service cost			3		3		8		8
	Interest cost			7		5		19		16
	Amortization of actuarial loss			1		3		5		8
	Net benefit cost			11		11		32		32

Financing_costs_and_additional

Financing costs and additional notes and loans payable information	9 Months Ended
	Sep. 30, 2014
Financing costs and additional notes and loans payable information	'
	5	Financing costs and additional notes and loans payable information
			Third Quarter					Nine Months
								to September 30
	millions of dollars		2014			2013		2014			2013
	Debt-related interest			20			21		61			47
	Capitalized interest			(20	)		(21)		(61	)		(47)
	Net interest expense			—			—		—			—
	Other interest			(1	)		(1)		3			1
	Total financing costs			(1	)		(1)		3			1
	In the first quarter of 2014, the company extended the maturity date of its existing $500 million 364-day short-term unsecured committed bank credit facility to March 2015. The company has not drawn on the facility.

Longterm_debt

Long-term debt	9 Months Ended
	Sep. 30, 2014
Long-term debt	'
	6	Long-term debt
	millions of dollars		As at		As at
			Sept 30		Dec 31
			2014		2013
	Long-term debt			4,316		4,316
	Capital leases			127		128
	Total long-term debt			4,443		4,444
	In January 2014, the company increased the capacity of its existing floating rate loan facility with an affiliated company of ExxonMobil from $5 billion to $6.25 billion.
	In the third quarter of 2014, the company extended the maturity date of its existing $500 million stand-by long-term bank credit facility to August 2016. The company has not drawn on the facility.

Other_longterm_obligations

Other long-term obligations	9 Months Ended
	Sep. 30, 2014
Other long-term obligations	'
	7	Other long-term obligations
	millions of dollars		As at		As at
			Sept 30		Dec 31
			2014		2013
	Employee retirement benefits (a)			1,237		1,448
	Asset retirement obligations and other environmental liabilities (b)			1,139		1,258
	Share-based incentive compensation liabilities			222		140
	Other obligations			219		245
	Total other long-term obligations			2,817		3,091
	(a)	Total recorded employee retirement benefits obligations also included $53 million in current liabilities (2013 - $53 million).
	(b)	Total asset retirement obligations and other environmental liabilities also included $157 million in current liabilities (2013 - $154 million).

Net_income_per_share

Net income per share	9 Months Ended
	Sep. 30, 2014
Net income per share	'
	8	Net income per share
			Third Quarter				Nine Months
							to September 30
			2014		2013		2014		2013
	Net income per common share - basic
	Net income (millions of dollars)			936		647		3,114		1,772
	Weighted average number of common shares outstanding (millions of shares)			847.6		847.6		847.6		847.6
	Net income per common share (dollars)			1.10		0.76		3.67		2.09
	Net income per common share - diluted
	Net income (millions of dollars)			936		647		3,114		1,772
	Weighted average number of common shares outstanding (millions of shares)			847.6		847.6		847.6		847.6
	Effect of share-based awards (millions of shares)			3.3		3.4		3.1		3.2
	Weighted average number of common shares outstanding, assuming dilution (millions of shares)			850.9		851.0		850.7		850.8
	Net income per common share (dollars)			1.10		0.76		3.66		2.08

Other_comprehensive_income_inf

Other comprehensive income information	9 Months Ended
	Sep. 30, 2014
Other comprehensive income information	'
	9	Other comprehensive income information
	Changes in accumulated other comprehensive income:
	millions of dollars		2014			2013
	Balance at January 1			(1,721)			(2,455)
	Post-retirement benefits liability adjustment:
	Current period change excluding amounts reclassified from accumulated other comprehensive income			(38)			(102)
	Amounts reclassified from accumulated other comprehensive income			109			154
	Balance at September 30			(1,650)			(2,403)
	Amounts reclassified out of accumulated other comprehensive income -
	before-tax income/(expense):
			Third Quarter					Nine Months
								to September 30
	millions of dollars		2014			2013		2014				2013
	Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost (a)			(46	)		(70)		(147	)			(207)
	(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:
			Third Quarter							Nine Months
										to September 30
	millions of dollars		2014			2013				2014				2013
	Post-retirement benefits liability adjustments:
	Post-retirement benefits liability adjustment (excluding amortization)			—			—				(13)				(35)
	Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost			12			18				38				53
				12			18				25				18

Business_segments_Tables

Business segments (Tables)	9 Months Ended
	Sep. 30, 2014
Business Segments	'
	Third Quarter		Upstream					Downstream					Chemical
	millions of dollars		2014			2013		2014			2013		2014			2013
	REVENUES AND OTHER INCOME
	Operating revenues (a)			2,365			1,786		6,912			6,469		364			322
	Intersegment sales			1,077			1,397		318			415		93			96
	Investment and other income			2			8		14			9		—			—
				3,444			3,191		7,244			6,893		457			418
	EXPENSES
	Exploration			14			30		—			—		—			—
	Purchases of crude oil and products			1,590			1,307		5,701			5,789		296			295
	Production and manufacturing			917			880		389			396		52			50
	Selling and general			(1	)		1		234			217		17			17
	Federal excise tax			—			—		412			385		—			—
	Depreciation and depletion			219			168		52			50		3			3
	Financing costs			(1	)		—		—			(1)		—			—
	TOTAL EXPENSES			2,738			2,386		6,788			6,836		368			365
	INCOME BEFORE INCOME TAXES			706			805		456			57		89			53
	INCOME TAXES			174			201		113			11		23			14
	NET INCOME			532			604		343			46		66			39
	Cash flows from (used in) operating activities			1,072			601		114			(315)		77			7
	CAPEX (b)			1,280			1,765		127			51		7			3
	Third Quarter		Corporate and Other					Eliminations					Consolidated
	millions of dollars		2014			2013		2014			2013		2014			2013
	REVENUES AND OTHER INCOME
	Operating revenues (a)			—			—		—			—		9,641			8,577
	Intersegment sales			—			—		(1,488	)		(1,908)		—			—
	Investment and other income			1			—		—			—		17			17
				1			—		(1,488	)		(1,908)		9,658			8,594
	EXPENSES
	Exploration			—			—		—			—		14			30
	Purchases of crude oil and products			—			—		(1,487	)		(1,907)		6,100			5,484
	Production and manufacturing			—			—		—			(1)		1,358			1,325
	Selling and general			5			56		(1	)		—		254			291
	Federal excise tax			—			—		—			—		412			385
	Depreciation and depletion			2			2		—			—		276			223
	Financing costs			—			—		—			—		(1	)		(1)
	TOTAL EXPENSES			7			58		(1,488	)		(1,908)		8,413			7,737
	INCOME BEFORE INCOME TAXES			(6	)		(58)		—			—		1,245			857
	INCOME TAXES			(1	)		(16)		—			—		309			210
	NET INCOME			(5	)		(42)		—			—		936			647
	Cash flows from (used in) operating activities			(33	)		5		—			—		1,230			298
	CAPEX (b)			20			21		—			—		1,434			1,840
	(a)	Included export sales to the United States of $2,092 million (2013 - $1,380 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, equipment and intangibles, additions to capital leases, additional investments and acquisition.
	Nine Months to September 30		Upstream					Downstream					Chemical
	millions of dollars		2014			2013		2014			2013		2014			2013
	REVENUES AND OTHER INCOME
	Operating revenues (a)			6,671			4,392		20,458			19,120		1,108			958
	Intersegment sales			3,188			3,344		1,118			1,603		310			240
	Investment and other income			658			55		34			39		—			—
				10,517			7,791		21,610			20,762		1,418			1,198
	EXPENSES
	Exploration			52			74		—			—		—			—
	Purchases of crude oil and products			4,425			3,030		16,898			16,788		966			826
	Production and manufacturing (c)			2,933			2,508		1,125			1,312		166			157
	Selling and general			2			4		658			651		53			49
	Federal excise tax			—			—		1,165			1,041		—			—
	Depreciation and depletion (c)			657			443		162			401		9			9
	Financing costs			3			—		—			1		—			—
	TOTAL EXPENSES			8,072			6,059		20,008			20,194		1,194			1,041
	INCOME BEFORE INCOME TAXES			2,445			1,732		1,602			568		224			157
	INCOME TAXES			604			431		405			141		58			41
	NET INCOME			1,841			1,301		1,197			427		166			116
Cash flows from (used in) operating activities			2,062			1,065		1,074			420		154			122
CAPEX (b)			3,680			6,272		310			128		15			6
Total assets as at September 30			33,799			29,693		6,027			6,159		381			374
Nine Months to September 30		Corporate and Other					Eliminations					Consolidated
millions of dollars		2014			2013		2014			2013		2014			2013
REVENUES AND OTHER INCOME
Operating revenues (a)			—			—		—			—		28,237			24,470
Intersegment sales			—			—		(4,616	)		(5,187)		—			—
Investment and other income			4			2		—			—		696			96
			4			2		(4,616	)		(5,187)		28,933			24,566
EXPENSES
Exploration			—			—		—			—		52			74
Purchases of crude oil and products			—			—		(4,612	)		(5,184)		17,677			15,460
Production and manufacturing (c)			—			—		—			(3)		4,224			3,974
Selling and general			116			93		(4	)		—		825			797
Federal excise tax			—			—		—			—		1,165			1,041
Depreciation and depletion (c)			8			7		—			—		836			860
Financing costs			—			—		—			—		3			1
TOTAL EXPENSES			124			100		(4,616	)		(5,187)		24,782			22,207
INCOME BEFORE INCOME TAXES			(120	)		(98)		—			—		4,151			2,359
INCOME TAXES			(30	)		(26)		—			—		1,037			587
NET INCOME			(90	)		(72)		—			—		3,114			1,772
Cash flows from (used in) operating activities			24			26		—			—		3,314			1,633
CAPEX (b)			61			47		—			—		4,066			6,453
Total assets as at September 30			426			364		(391	)		(509)		40,242			36,081
(a)	Included export sales to the United States of $4,888 million (2013 - $4,071 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, equipment and intangibles, additions to capital leases, additional investments and acquisition.
(c)	A second quarter 2013 charge in the Downstream segment of $355 million ($264 million, after-tax) associated with the company’s decision to convert the Dartmouth refinery to a terminal included the write-down of refinery plant and equipment not included in the terminal conversion of $245 million, reported as part of depreciation and depletion expenses, and decommissioning, environmental and employee-related costs of $110 million, reported as part of production and manufacturing expenses. Amounts incurred related to the project at the end of the third quarter 2014 associated with decommissioning, environmental and employee-related costs were $79 million.

Investment_and_other_income_Ta

Investment and other income (Tables)	9 Months Ended
	Sep. 30, 2014
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 dollars		2014		2013		2014		2013
	Proceeds from asset sales (a)			7		6		814		68
	Book value of assets sold			3		1		150		8
	Gain/(loss) on asset sales, before tax (a)			4		5		664		60
	Gain/(loss) on asset sales, after tax (a)			2		5		498		46
	(a)	The nine months ended September 30, 2014 included gains of $638 million ($478 million, after tax) from the sale of the company’s interest in producing conventional assets located in Boundary Lake, Cynthia/West Pembina and Rocky Mountain House.

Employee_retirement_benefits_T

Employee retirement benefits (Tables)	9 Months Ended
	Sep. 30, 2014
Schedule of Components of Net Benefit Cost	'
	The components of net benefit cost were as follows:
		Third Quarter				Nine Months
						to September 30
	millions of dollars	2014		2013		2014		2013
	Pension benefits:
	Current service cost		37		46		114		136
	Interest cost		82		71		241		211
	Expected return on plan assets		(95)		(85)		(277)		(248)
	Amortization of prior service cost		6		6		17		17
	Amortization of actuarial loss		39		61		125		182
	Net benefit cost		69		99		220		298
	Other post-retirement benefits:
	Current service cost		3		3		8		8
	Interest cost		7		5		19		16
	Amortization of actuarial loss		1		3		5		8
	Net benefit cost		11		11		32		32

Financing_costs_and_additional1

Financing costs and additional notes and loans payable information (Tables)	9 Months Ended
	Sep. 30, 2014
Schedule Of Financing Costs	'
		Third Quarter					Nine Months
							to September 30
	millions of dollars	2014			2013		2014			2013
	Debt-related interest		20			21		61			47
	Capitalized interest		(20	)		(21)		(61	)		(47)
	Net interest expense		—			—		—			—
	Other interest		(1	)		(1)		3			1
	Total financing costs		(1	)		(1)		3			1

Longterm_debt_Tables

Long-term debt (Tables)	9 Months Ended
	Sep. 30, 2014
Long-Term Debt	'
	millions of dollars	As at		As at
		Sept 30		Dec 31
		2014		2013
	Long-term debt		4,316		4,316
	Capital leases		127		128
	Total long-term debt		4,443		4,444

Other_longterm_obligations_Tab

Other long-term obligations (Tables)	9 Months Ended
	Sep. 30, 2014
Other Long-Term Obligations	'
	millions of dollars		As at		As at
			Sept 30		Dec 31
			2014		2013
	Employee retirement benefits (a)			1,237		1,448
	Asset retirement obligations and other environmental liabilities (b)			1,139		1,258
	Share-based incentive compensation liabilities			222		140
	Other obligations			219		245
	Total other long-term obligations			2,817		3,091
	(a)	Total recorded employee retirement benefits obligations also included $53 million in current liabilities (2013 - $53 million).
	(b)	Total asset retirement obligations and other environmental liabilities also included $157 million in current liabilities (2013 - $154 million).

Net_income_per_share_Tables

Net income per share (Tables)	9 Months Ended
	Sep. 30, 2014
Calculation of Basic and Diluted Earnings Per Share	'
		Third Quarter				Nine Months
						to September 30
		2014		2013		2014		2013
	Net income per common share - basic
	Net income (millions of dollars)		936		647		3,114		1,772
	Weighted average number of common shares outstanding (millions of shares)		847.6		847.6		847.6		847.6
	Net income per common share (dollars)		1.10		0.76		3.67		2.09
	Net income per common share - diluted
	Net income (millions of dollars)		936		647		3,114		1,772
	Weighted average number of common shares outstanding (millions of shares)		847.6		847.6		847.6		847.6
	Effect of share-based awards (millions of shares)		3.3		3.4		3.1		3.2
	Weighted average number of common shares outstanding, assuming dilution (millions of shares)		850.9		851.0		850.7		850.8
	Net income per common share (dollars)		1.10		0.76		3.66		2.08

Other_comprehensive_income_inf1

Other comprehensive income information (Tables)	9 Months Ended
	Sep. 30, 2014
Changes in Accumulated Other Comprehensive Income	'
	Changes in accumulated other comprehensive income:
	millions of dollars		2014			2013
	Balance at January 1			(1,721)			(2,455)
	Post-retirement benefits liability adjustment:
	Current period change excluding amounts reclassified from accumulated other comprehensive income			(38)			(102)
	Amounts reclassified from accumulated other comprehensive income			109			154
	Balance at September 30			(1,650)			(2,403)
Amounts Reclassified Out of Accumulated Other Comprehensive Income Before-Tax Income/(Expense)	'
	Amounts reclassified out of accumulated other comprehensive income -
	before-tax income/(expense):
			Third Quarter					Nine Months
								to September 30
	millions of dollars		2014			2013		2014				2013
	Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost (a)			(46	)		(70)		(147	)			(207)
	(a)	This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).
Schedule of Income Tax Expense/(Credit) for Components of Other Comprehensive Income	'
	Income tax expense/(credit) for components of other comprehensive income:
			Third Quarter							Nine Months
										to September 30
	millions of dollars		2014			2013				2014				2013
	Post-retirement benefits liability adjustments:
	Post-retirement benefits liability adjustment (excluding amortization)			—			—				(13)				(35)
	Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost			12			18				38				53
				12			18				25				18

Business_Segments_Detail

Business Segments (Detail) (CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
REVENUES AND OTHER INCOME	'		'		'		'		'
Operating revenues	9,641	[1],[2],[3]	8,577	[1],[2],[3]	28,237	[1],[2],[4]	24,470	[1],[2],[4]	'
Investment and other income	17		17		696		96		'
TOTAL REVENUES AND OTHER INCOME	9,658		8,594		28,933		24,566		'
EXPENSES	'		'		'		'		'
Exploration	14		30		52		74		'
Purchases of crude oil and products	6,100	[5]	5,484	[5]	17,677	[5]	15,460	[5]	'
Production and manufacturing	1,358	[6]	1,325	[6]	4,224	[6],[7]	3,974	[6],[7]	'
Selling and general	254		291		825		797		'
Federal excise tax	412	[2]	385	[2]	1,165	[2]	1,041	[2]	'
Depreciation and depletion	276		223		836	[7]	860	[7]	'
Financing costs	-1		-1		3		1		'
TOTAL EXPENSES	8,413		7,737		24,782		22,207		'
INCOME BEFORE INCOME TAXES	1,245		857		4,151		2,359		'
INCOME TAXES	309		210		1,037		587		'
NET INCOME	936		647		3,114		1,772		'
Cash flows from (used in) operating activities	1,230		298		3,314		1,633		'
CAPEX	1,434	[8]	1,840	[8]	4,066	[8]	6,453	[8]	'
Total assets as at September 30	40,242		36,081		40,242		36,081		37,218
Upstream	'		'		'		'		'
REVENUES AND OTHER INCOME	'		'		'		'		'
Operating revenues	2,365	[3]	1,786	[3]	6,671	[4]	4,392	[4]	'
Intersegment sales	1,077		1,397		3,188		3,344		'
Investment and other income	2		8		658		55		'
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME	3,444		3,191		10,517		7,791		'
EXPENSES	'		'		'		'		'
Exploration	14		30		52		74		'
Purchases of crude oil and products	1,590		1,307		4,425		3,030		'
Production and manufacturing	917		880		2,933	[7]	2,508	[7]	'
Selling and general	-1		1		2		4		'
Depreciation and depletion	219		168		657	[7]	443	[7]	'
Financing costs	-1		'		3		'		'
TOTAL EXPENSES	2,738		2,386		8,072		6,059		'
INCOME BEFORE INCOME TAXES	706		805		2,445		1,732		'
INCOME TAXES	174		201		604		431		'
NET INCOME	532		604		1,841		1,301		'
Cash flows from (used in) operating activities	1,072		601		2,062		1,065		'
CAPEX	1,280	[8]	1,765	[8]	3,680	[8]	6,272	[8]	'
Total assets as at September 30	33,799		29,693		33,799		29,693		'
Downstream	'		'		'		'		'
REVENUES AND OTHER INCOME	'		'		'		'		'
Operating revenues	6,912	[3]	6,469	[3]	20,458	[4]	19,120	[4]	'
Intersegment sales	318		415		1,118		1,603		'
Investment and other income	14		9		34		39		'
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME	7,244		6,893		21,610		20,762		'
EXPENSES	'		'		'		'		'
Purchases of crude oil and products	5,701		5,789		16,898		16,788		'
Production and manufacturing	389		396		1,125	[7]	1,312	[7]	'
Selling and general	234		217		658		651		'
Federal excise tax	412		385		1,165		1,041		'
Depreciation and depletion	52		50		162	[7]	401	[7]	'
Financing costs	'		-1		'		1		'
TOTAL EXPENSES	6,788		6,836		20,008		20,194		'
INCOME BEFORE INCOME TAXES	456		57		1,602		568		'
INCOME TAXES	113		11		405		141		'
NET INCOME	343		46		1,197		427		'
Cash flows from (used in) operating activities	114		-315		1,074		420		'
CAPEX	127	[8]	51	[8]	310	[8]	128	[8]	'
Total assets as at September 30	6,027		6,159		6,027		6,159		'
Chemical	'		'		'		'		'
REVENUES AND OTHER INCOME	'		'		'		'		'
Operating revenues	364	[3]	322	[3]	1,108	[4]	958	[4]	'
Intersegment sales	93		96		310		240		'
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME	457		418		1,418		1,198		'
EXPENSES	'		'		'		'		'
Purchases of crude oil and products	296		295		966		826		'
Production and manufacturing	52		50		166	[7]	157	[7]	'
Selling and general	17		17		53		49		'
Depreciation and depletion	3		3		9	[7]	9	[7]	'
TOTAL EXPENSES	368		365		1,194		1,041		'
INCOME BEFORE INCOME TAXES	89		53		224		157		'
INCOME TAXES	23		14		58		41		'
NET INCOME	66		39		166		116		'
Cash flows from (used in) operating activities	77		7		154		122		'
CAPEX	7	[8]	3	[8]	15	[8]	6	[8]	'
Total assets as at September 30	381		374		381		374		'
Corporate and Other	'		'		'		'		'
REVENUES AND OTHER INCOME	'		'		'		'		'
Investment and other income	1		'		4		2		'
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME	1		'		4		2		'
EXPENSES	'		'		'		'		'
Selling and general	5		56		116		93		'
Depreciation and depletion	2		2		8	[7]	7	[7]	'
TOTAL EXPENSES	7		58		124		100		'
INCOME BEFORE INCOME TAXES	-6		-58		-120		-98		'
INCOME TAXES	-1		-16		-30		-26		'
NET INCOME	-5		-42		-90		-72		'
Cash flows from (used in) operating activities	-33		5		24		26		'
CAPEX	20	[8]	21	[8]	61	[8]	47	[8]	'
Total assets as at September 30	426		364		426		364		'
Consolidation, Eliminations	'		'		'		'		'
REVENUES AND OTHER INCOME	'		'		'		'		'
Intersegment sales	-1,488		-1,908		-4,616		-5,187		'
TOTAL OPERATING REVENUES, INTERSEGMENT SALES, INVESTMENT AND OTHER INCOME	-1,488		-1,908		-4,616		-5,187		'
EXPENSES	'		'		'		'		'
Purchases of crude oil and products	-1,487		-1,907		-4,612		-5,184		'
Production and manufacturing	'		-1		'		-3	[7]	'
Selling and general	-1		'		-4		'		'
TOTAL EXPENSES	-1,488		-1,908		-4,616		-5,187		'
Total assets as at September 30	-391		-509		-391		-509		'
[1]	Amounts from related parties included in operating revenues 1,201 711 2,759 1,936
[2]	Federal excise tax included in operating revenues 412 385 1,165 1,041
[3]	Included export sales to the United States of $2,092 million (2013 - $1,380 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[4]	Included export sales to the United States of $4,888 million (2013 - $4,071 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[5]	Amounts to related parties included in purchases of crude oil and products 1,111 1,018 2,939 3,544
[6]	Amounts to related parties included in production and manufacturing expenses 93 85 268 255
[7]	A second quarter 2013 charge in the Downstream segment of $355 million ($264 million, after-tax) associated with the company's decision to convert the Dartmouth refinery to a terminal included the write-down of refinery plant and equipment not included in the terminal conversion of $245 million, reported as part of depreciation and depletion expenses, and decommissioning, environmental and employee-related costs of $110 million, reported as part of production and manufacturing expenses. Amounts incurred related to the project at the end of the third quarter 2014 associated with decommissioning, environmental and employee-related costs were $79 million.
[8]	Capital and exploration expenditures (CAPEX) include exploration expenses, additions to property, plant, equipment and intangibles, additions to capital leases, additional investments and acquisition.

Business_Segments_Parenthetica

Business Segments (Parenthetical) (Detail) (CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]	'		'		'		'
Operating revenues	9,641	[1],[2],[3]	8,577	[1],[2],[3]	28,237	[1],[2],[4]	24,470	[1],[2],[4]
Write-down of refinery plant and equipment reported as depreciation and depletion expenses	'		'		'		245
Decommissioning, environmental and employee-related costs reported as production and manufacturing expenses	'		'		'		110
Amount incurred related to decommissioning, environmental and employee related cost	79		'		'		'
Pre Tax	'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'
Charges related to conversion of refinery to terminal	'		'		'		355
After Tax	'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'
Charges related to conversion of refinery to terminal	'		'		'		264
United States Exports	'		'		'		'
Segment Reporting Information [Line Items]	'		'		'		'
Operating revenues	2,092		1,380		4,888		4,071
[1]	Amounts from related parties included in operating revenues 1,201 711 2,759 1,936
[2]	Federal excise tax included in operating revenues 412 385 1,165 1,041
[3]	Included export sales to the United States of $2,092 million (2013 - $1,380 million). Export sales to the United States were recorded in all operating segments, with the largest effects in the Upstream segment.
[4]	Included export sales to the United States of $4,888 million (2013 - $4,071 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_Sale

Gains and Losses on Asset Sales (Detail) (CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Investment And Other Income [Line Items]	'		'		'		'
Proceeds from asset sales	7	[1]	6	[1]	814	[1]	68	[1]
Book value of assets sold	3		1		150		8
Gain/(loss) on asset sales, before tax	4	[1]	5	[1]	664	[1]	60	[1]
Gain/(loss) on asset sales, after tax	2	[1]	5	[1]	498	[1]	46	[1]
[1]	The nine months ended September 30, 2014 included gains of $638 million ($478 million, after tax) from the sale of the company's interest in producing conventional assets located in Boundary Lake, Cynthia/West Pembina and Rocky Mountain House.

Gains_and_Losses_on_Asset_Sale1

Gains and Losses on Asset Sales (Parenthetical) (Detail) (CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Investment And Other Income [Line Items]	'		'		'		'
Gain/(loss) on asset sales, before tax	4	[1]	5	[1]	664	[1]	60	[1]
Gain/(loss) on asset sales, after tax	2	[1]	5	[1]	498	[1]	46	[1]
Conventional Assets	'		'		'		'
Investment And Other Income [Line Items]	'		'		'		'
Gain/(loss) on asset sales, before tax	'		'		638		'
Gain/(loss) on asset sales, after tax	'		'		478		'
[1]	The nine months ended September 30, 2014 included gains of $638 million ($478 million, after tax) from the sale of the company's interest in producing conventional assets located in Boundary Lake, Cynthia/West Pembina and Rocky Mountain House.

Components_of_Net_Periodic_Ben

Components of Net Periodic Benefit Cost (Detail) (CAD)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Current service cost	37	46	114	136
Interest cost	82	71	241	211
Expected return on plan assets	-95	-85	-277	-248
Amortization of prior service cost	6	6	17	17
Amortization of actuarial loss	39	61	125	182
Net benefit cost	69	99	220	298
Other post-retirement benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Current service cost	3	3	8	8
Interest cost	7	5	19	16
Amortization of actuarial loss	1	3	5	8
Net benefit cost	11	11	32	32

Recovered_Sheet1

Financing Costs and Additional Notes and Loans Payable Information (Detail) (CAD)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Debt-related interest	20	21	61	47
Capitalized interest	-20	-21	-61	-47
Net interest expense	'	'	'	'
Other interest	-1	-1	3	1
Total financing costs	-1	-1	3	1

Recovered_Sheet2

Financing Costs and Additional Notes and Loans Payable Information - Additional Information (Detail) (Unsecured committed bank credit facility, CAD)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Unsecured committed bank credit facility	'
Financing Activities [Line Items]	'
Debt instrument, maturity date	31-Mar-15
Line of Credit maximum borrowing capacity	500

Long_Term_Debt_Detail

Long Term Debt (Detail) (CAD)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]	'		'
Long-term debt	4,316		4,316
Capital leases	127		128
Total long-term debt	4,443	[1]	4,444	[1]
[1]	Long-term debt included amounts to related parties of $4,316 million (2013 - $4,316 million).

Long_Term_Debt_Additional_Info

Long Term Debt - Additional Information (Detail) (CAD)	Jan. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
In Millions, unless otherwise specified	Floating Rate Loan Facility	Floating Rate Loan Facility	Revolving demand loan
	Exxon Mobil	Exxon Mobil
Line of Credit Facility [Line Items]	'	'	'
Line of Credit maximum borrowing capacity	6,250	5,000	500
Debt instrument, maturity date	'	'	31-Aug-16

Other_LongTerm_Obligations_Det

Other Long-Term Obligations (Detail) (CAD)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Other Liabilities [Line Items]	'		'
Employee retirement benefits	1,237	[1]	1,448	[1]
Asset retirement obligations and other environmental liabilities	1,139	[2]	1,258	[2]
Share-based incentive compensation liabilities	222		140
Other obligations	219		245
Total other long-term obligations	2,817		3,091
[1]	Total recorded employee retirement benefits obligations also included $53 million in current liabilities (2013 - $53 million).
[2]	Total asset retirement obligations and other environmental liabilities also included $157 million in current liabilities (2013 - $154 million).

Other_LongTerm_Obligations_Par

Other Long-Term Obligations (Parenthetical) (Detail) (CAD)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Other Liabilities [Line Items]	'	'
Employee retirement benefits obligations in current liabilities	53	53
Asset retirement obligations and other environmental liabilities in current liabilities	157	154

Net_Income_Per_Share_Detail

Net Income Per Share (Detail) (CAD)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income per common share - basic	'	'	'	'
NET INCOME	936	647	3,114	1,772
Weighted average number of common shares outstanding (millions of shares)	847.6	847.6	847.6	847.6
Net income per common share (dollars)	1.1	0.76	3.67	2.09
Net income per common share - diluted	'	'	'	'
NET INCOME	936	647	3,114	1,772
Weighted average number of common shares outstanding (millions of shares)	847.6	847.6	847.6	847.6
Effect of share-based awards (millions of shares)	3.3	3.4	3.1	3.2
Weighted average number of common shares outstanding, assuming dilution (millions of shares)	850.9	851	850.7	850.8
Net income per common share (dollars)	1.1	0.76	3.66	2.08

Changes_in_Accumulated_Other_C

Changes in Accumulated Other Comprehensive Income (Detail) (CAD)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Balance at January 1	'	'	-1,721	-2,455
Current period change excluding amounts reclassified from accumulated other comprehensive income	'	'	-38	-102
Amounts reclassified from accumulated other comprehensive income	34	52	109	154
Balance at September 30	-1,650	-2,403	-1,650	-2,403

Amounts_Reclassified_Out_of_Ac

Amounts Reclassified Out of Accumulated Other Comprehensive Income (Detail) (Reclassification Adjustment out of Accumulated Other Comprehensive Income, CAD)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
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	-46	[1]	-70	[1]	-147	[1]	-207	[1]
[1]	This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).

Income_Tax_ExpenseCredit_for_C

Income Tax Expense/(Credit) for Components of Other Comprehensive Income (Detail) (CAD)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'
Post-retirement benefits liability adjustment (excluding amortization)	'	'	-13	-35
Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost	12	18	38	53
Total	12	18	25	18