Spectra Energy 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Jun-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q2
Trading Symbol	'SE
Entity Registrant Name	'SPECTRA ENERGY CORP.
Entity Central Index Key	'0001373835
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Large Accelerated Filer
Entity Common Stock, Shares Outstanding	670,893,796

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended				6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Operating Revenues	'		'		'		'
Transportation, storage and processing of natural gas	$780		$766		$1,667		$1,566
Distribution of natural gas	309		283		935		908
Sales of natural gas liquids	40		65		227		177
Transportation of crude oil	70		67		141		80
Other	54		39		126		78
Total operating revenues	1,253		1,220		3,096		2,809
Operating Expenses	'		'		'		'
Natural gas and petroleum products purchased	209		167		737		632
Operating, maintenance and other	405		410		768		742
Depreciation and amortization	199		196		399		382
Property and other taxes	102		93		215		193
Total operating expenses	915		866		2,119		1,949
Operating Income	338		354		977		860
Other Income and Expenses	'		'		'		'
Equity in earnings of unconsolidated affiliates	85		72		246		182
Other income and expenses, net	6		22		15		55
Total other income and expenses	91		94		261		237
Interest Expense	176		160		354		309
Earnings Before Income Taxes	253		288		884		788
Income Tax Expense	65		62		229		192
Net Income	188		226		655		596
Net Income—Noncontrolling Interests	42		27		90		57
Net Income—Controlling Interests	$146		$199		$565		$539
Weighted-average shares outstanding	'		'		'		'
Basic (in shares)	671		669		671		669
Diluted (in shares)	673		671		672		671
Earnings per share	'		'		'		'
Earnings Per Share, Basic	$0.22	[1]	$0.30	[1]	$0.84	[1]	$0.81	[1]
Earnings Per Share, Diluted	$0.22	[1]	$0.30	[1]	$0.84	[1]	$0.80	[1]
Dividends per share	$0.34		$0.31		$0.67		$0.61
[1]	(a) Quarterly earnings-per-share amounts are stand-alone calculations and may not be additive to full-year amounts due to rounding.

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Income	$188	$226	$655	$596
Other comprehensive income (loss)	'	'	'	'
Foreign currency translation adjustments	223	-251	-25	-440
Unrealized mark-to-market net gain on hedges	1	0	3	3
Reclassification of cash flow hedges into earnings	1	2	3	4
Pension and benefits impact (net of taxes of $3, $5, $6 and $9, respectively)	6	10	13	21
Other	0	-1	0	0
Total other comprehensive income (loss)	231	-240	-6	-412
Total Comprehensive Income (Loss), net of tax	419	-14	649	184
Less: Comprehensive Income—Noncontrolling Interests	45	25	89	52
Comprehensive Income (Loss)—Controlling Interests	$374	($39)	$560	$132

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	$3	$4	$6	$9

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current Assets	'	'
Cash and cash equivalents	$300	$201
Receivables, net	1,222	1,336
Inventory	277	263
Fuel Tracker	165	28
Other	241	253
Total current assets	2,205	2,081
Investments and Other Assets	'	'
Investments in and loans to unconsolidated affiliates	2,803	3,043
Goodwill	4,841	4,810
Other	398	385
Total investments and other assets	8,042	8,238
Property, Plant and Equipment	'	'
Cost	29,223	28,456
Less accumulated depreciation and amortization	6,963	6,627
Net property, plant and equipment	22,260	21,829
Regulatory Assets and Deferred Debits	1,439	1,385
Total Assets	33,946	33,533
Current Liabilities	'	'
Accounts payable	518	440
Commercial paper	769	1,032
Taxes accrued	103	72
Interest accrued	193	201
Current maturities of long-term debt	496	1,197
Other	1,077	1,097
Total current liabilities	3,156	4,039
Long-term Debt	13,141	12,488
Deferred Credits and Other Liabilities	'	'
Deferred income taxes	5,223	4,968
Regulatory and other	1,423	1,457
Total deferred credits and other liabilities	6,646	6,425
Commitments and Contingencies	'	'
Preferred Stock of Subsidiaries	258	258
Equity	'	'
Preferred stock, $0.001 par, 22 million shares authorized, no shares outstanding	0	0
Common stock, $0.001 par, 1 billion shares authorized, 671 million and 670 million shares outstanding at June 30, 2014 and December 31, 2013, respectively	1	1
Additional paid-in capital	4,918	4,869
Retained earnings	2,497	2,383
Accumulated other comprehensive income	1,236	1,241
Total controlling interests	8,652	8,494
Noncontrolling interests	2,093	1,829
Total equity	10,745	10,323
Total Liabilities and Equity	$33,946	$33,533

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Preferred stock, par (usd per share)	$0.00	$0.00
Preferred stock, shares authorized	22,000,000	22,000,000
Preferred stock, shares outstanding	0	0
Common stock, par (usd per share)	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares outstanding	671,000,000	670,000,000

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net income	$655	$596
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	405	388
Deferred income tax expense	224	182
Equity in earnings of unconsolidated affiliates	-246	-182
Distributions received from unconsolidated affiliates	199	147
Other	-28	69
Net cash provided by (used in) operating activities	1,209	1,200
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Capital expenditures	-833	-959
Investments in and loans to unconsolidated affiliates	-30	-168
Acquisitions, net of cash acquired	0	-1,254
Purchases of held-to-maturity securities	-437	-456
Proceeds from sales and maturities of held-to-maturity securities	453	463
Purchases of available-for-sale securities	-13	-2,899
Proceeds from sales and maturities of available-for-sale securities	7	2,722
Distributions received from unconsolidated affiliates	242	13
Other changes in restricted funds	-1	1
Other	0	2
Net cash provided by (used in) investing activities	-612	-2,535
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from the issuance of long-term debt	712	1,848
Payments for the redemption of long-term debt	-736	-546
Net increase (decrease) in commercial paper	-256	440
Distributions to noncontrolling interests	-81	-69
Contributions from noncontrolling interests	112	0
Dividends paid on common stock	-453	-412
Proceeds from the issuance of Spectra Energy Partners, LP common units	191	190
Other	12	10
Net cash provided by (used in) financing activities	-499	1,461
Effect of exchange rate changes on cash	1	-3
Net increase in cash and cash equivalents	99	123
Cash and cash equivalents at beginning of period	201	94
Cash and cash equivalents at end of period	300	217
Supplemental Disclosures	'	'
Property, plant and equipment non-cash accruals	$118	$148

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements of Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income Foreign Currency Translation Adjustments	Accumulated Other Comprehensive Income Other	Noncontrolling Interests
In Millions, unless otherwise specified
Beginning Balance at Dec. 31, 2012	$9,843	$1	$5,297	$2,165	$2,044	($535)	$871
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Net income	596	'	'	539	'	'	57
Other comprehensive income (loss)	-412	'	'	'	-435	28	-5
Dividends on common stock	-410	'	'	-410	'	'	'
Stock-based compensation	4	'	4	'	'	'	'
Distributions to noncontrolling interests	-69	'	'	'	'	'	-69
Contributions from noncontrolling interests	0	'	'	'	'	'	'
Spectra Energy common stock issued	10	'	10	'	'	'	'
Spectra Energy Partners, LP common units issued	166	'	38	'	'	'	128
Other, net	1	'	-2	0	'	'	3
Ending Balance at Jun. 30, 2013	9,729	1	5,347	2,294	1,609	-507	985
Beginning Balance at Dec. 31, 2013	10,323	1	4,869	2,383	1,557	-316	1,829
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'	'
Net income	655	'	'	565	'	'	90
Other comprehensive income (loss)	-6	'	'	'	-24	19	-1
Dividends on common stock	-451	'	'	-451	'	'	'
Stock-based compensation	6	'	6	'	'	'	'
Distributions to noncontrolling interests	-81	'	'	'	'	'	-81
Contributions from noncontrolling interests	112	'	'	'	'	'	112
Spectra Energy common stock issued	9	'	9	'	'	'	'
Spectra Energy Partners, LP common units issued	173	'	29	'	'	'	144
Transfer of interests in subsidiaries to Spectra Energy Partners, LP	1	'	'	'	'	'	1
Other, net	4	'	5	'	'	'	-1
Ending Balance at Jun. 30, 2014	$10,745	$1	$4,918	$2,497	$1,533	($297)	$2,093

General

General	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
General	'
	General
	The terms “we,” “our,” “us” and “Spectra Energy” as used in this report refer collectively to Spectra Energy Corp and its subsidiaries unless the context suggests otherwise. These terms are used for convenience only and are not intended as a precise description of any separate legal entity within Spectra Energy. The term “Spectra Energy Partners” refers to our Spectra Energy Partners operating segment. The term “SEP” refers to Spectra Energy Partners, LP, our master limited partnership.
	Nature of Operations. Spectra Energy Corp, through its subsidiaries and equity affiliates, owns and operates a large and diversified portfolio of complementary natural gas-related energy assets, and owns and operates a crude oil pipeline system that connects Canadian and U.S. producers to refineries in the U.S. Rocky Mountain and Midwest regions. We currently operate in three key areas of the natural gas industry: gathering and processing, transmission and storage, and distribution. We provide transmission and storage of natural gas to customers in various regions of the northeastern and southeastern United States, the Maritime Provinces in Canada, the Pacific Northwest in the United States and Canada, and in the province of Ontario, Canada. We also provide natural gas sales and distribution services to retail customers in Ontario, and natural gas gathering and processing services to customers in western Canada. We also own a 50% interest in DCP Midstream, LLC (DCP Midstream), based in Denver, Colorado, one of the leading natural gas gatherers in the United States based on wellhead volumes, and one of the largest U.S. producers and marketers of natural gas liquids (NGLs).
	Basis of Presentation. The accompanying Condensed Consolidated Financial Statements include our accounts and the accounts of our majority-owned subsidiaries, after eliminating intercompany transactions and balances. These interim financial statements should be read in conjunction with the consolidated financial statements included in our Annual Report on Form
	10-K for the year ended December 31, 2013, and reflect all normal recurring adjustments that are, in our opinion, necessary to fairly present our results of operations and financial position. Amounts reported in the Condensed Consolidated Statements of Operations are not necessarily indicative of amounts expected for the respective annual periods due to the effects of seasonal temperature variations on energy consumption, primarily in our gas distribution operations, as well as changing commodity prices on certain of our processing operations and other factors.
	Use of Estimates. To conform with generally accepted accounting principles (GAAP) in the United States, we make estimates and assumptions that affect the amounts reported in the Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements. Although these estimates are based on our best available knowledge at the time, actual results could differ.

Acquisition_of_ExpressPlatte

Acquisition of Express-Platte	6 Months Ended
	Jun. 30, 2014
Acquisition of Express-Platte [Abstract]	'
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	'
	Acquisition of Express-Platte
	In March 2013, we acquired 100% of the ownership interests in the Express-Platte crude oil pipeline system for $1.5 billion, consisting of $1.25 billion in cash and $260 million of acquired debt, before working capital adjustments. The Express-Platte pipeline system, which begins in Hardisty, Alberta, and terminates in Wood River, Illinois, is comprised of both the Express and Platte crude oil pipelines. The Express pipeline carries crude oil to U.S. refining markets in the Rockies area, including Montana, Wyoming, Colorado and Utah. The Platte pipeline, which interconnects with Express pipeline in Casper, Wyoming, transports crude oil predominantly from the Bakken shale and western Canada to refineries in the Midwest. In 2013, subsidiaries of Spectra Energy contributed a 100% interest in the U.S. portion of Express-Platte and sold a 100% ownership interest in the Canadian portion to SEP.
	The following table summarizes the fair values of the assets and liabilities acquired as of the date of the acquisition.
		Purchase Price
		Allocation
		(in millions)
	Cash purchase price	$	1,250
	Working capital and other purchase adjustments	71
	Total	1,321
	Cash	67
	Receivables	25
	Other current assets	9
	Property, plant and equipment	1,251
	Accounts payable	(18		)
	Other current liabilities	(17		)
	Deferred credits and other liabilities	(259		)
	Long-term debt, including current portion	(260		)
	Total assets acquired/liabilities assumed	798
	Goodwill	$	523
	The purchase price is greater than the sum of fair values of the net assets acquired, resulting in goodwill as noted above. The goodwill reflects the value of the strategic location of the pipeline and the opportunity to grow the business. Goodwill related to the acquisition of Express-Platte is not deductible for income tax purposes.
	The allocation of the fair values of assets and liabilities acquired related to the acquisition of Express-Platte was finalized in the first quarter of 2014, resulting in the following adjustments to amounts reported as of December 31, 2013: a $60 million decrease in Property, Plant and Equipment, a $1 million decrease in Other Current Assets and a $24 million decrease in Deferred Credits and Other Liabilities, resulting in a $37 million increase in Goodwill.
	Pro forma results of operations that reflect the acquisition of Express-Platte as if the acquisition had occurred as of the beginning of 2013 are not presented as they do not materially differ from actual results reported in our Condensed Consolidated Statements of Operations.

Business_Segments

Business Segments	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Business Segments	'
	Business Segments
	In November 2013, Spectra Energy contributed substantially all of its remaining U.S. transmission, storage and liquids assets to SEP (the U.S. Assets Dropdown). As a result of this transaction, we realigned our reportable segments structure. Amounts presented herein for 2013 segment information have been recast to conform to our current segment reporting presentation. There were no changes to consolidated data as a result of the recast of our segment information.
	We manage our business in four reportable segments: Spectra Energy Partners, Distribution, Western Canada Transmission & Processing and Field Services. The remainder of our business operations is presented as “Other,” and consists of unallocated corporate costs and employee benefit plan assets and liabilities, 100%-owned captive insurance subsidiaries and other miscellaneous activities.
	Our chief operating decision maker (CODM) regularly reviews financial information about each of these segments in deciding how to allocate resources and evaluate performance. There is no aggregation within our reportable business segments.
	The presentation of our Spectra Energy Partners segment is reflective of the parent-level focus by our CODM, considering the resource allocation and governance provisions associated with SEP’s master limited partnership structure. SEP maintains a capital and cash management structure that is separate from Spectra Energy’s, is self-funding and maintains its own lines of bank credit and cash management accounts. It is in this context that our CODM evaluates the Spectra Energy Partners segment as a whole, without regard to any of SEP’s individual businesses. These factors, coupled with a different cost of capital of our other businesses, serve to differentiate how our Spectra Energy Partners segment is managed as compared to how SEP is managed.
	Spectra Energy Partners provides transmission, storage and gathering of natural gas, as well as the transportation of crude oil and natural gas liquids (NGLs) through interstate pipeline systems for customers in various regions of the midwestern, northeastern and southeastern United States and Canada. The natural gas transmission and storage operations are primarily subject to the rules and regulations of the Federal Energy Regulatory Commission (FERC). The crude oil transportation operations are primarily subject to regulation by the FERC in the U.S. and the National Energy Board (NEB) in Canada. Our Spectra Energy Partners segment is composed of the operations of SEP, less governance costs, which are included in “Other.”
	Distribution provides retail natural gas distribution service in Ontario, Canada, as well as natural gas transmission and storage services to other utilities and energy market participants. These services are provided by Union Gas Limited (Union Gas), and are primarily subject to the rules and regulations of the Ontario Energy Board (OEB).
	Western Canada Transmission & Processing provides transmission of natural gas, natural gas gathering and processing services, and NGL extraction, fractionation, transportation, storage and marketing to customers in western Canada, the northern tier of the United States and the Maritime Provinces in Canada. This segment conducts business mostly through BC Pipeline, BC Field Services, and the NGL marketing and Canadian Midstream businesses, and Maritimes & Northeast Pipeline Limited Partnership (M&N Canada). BC Pipeline and BC Field Services operations are primarily subject to the rules and regulations of the NEB.
	Field Services gathers, compresses, treats, processes, transports, stores and sells natural gas, produces, fractionates, transports, stores and sells NGLs, and recovers and sells condensate. In addition, Field Services trades and markets natural gas and NGLs. It conducts operations through DCP Midstream, which is owned 50% by us and 50% by Phillips 66. DCP Midstream gathers raw natural gas through gathering systems located in nine major conventional and non-conventional natural gas producing regions: Mid-Continent, Rocky Mountain, East Texas-North Louisiana, Barnett Shale, Gulf Coast, South Texas, Central Texas, Antrim Shale and Permian Basin. DCP Midstream Partners, LP (DCP Partners) is a publicly-traded master limited partnership, of which DCP Midstream acts as general partner. As of June 30, 2014, DCP Midstream had an approximate 22% ownership interest in DCP Partners, including DCP Midstream’s limited partner and general partner interests.
	Our reportable segments offer different products and services and are managed separately as business units. Management evaluates segment performance based on earnings from continuing operations before interest, taxes, and depreciation and amortization (EBITDA). Cash, cash equivalents and short-term investments are managed at the parent-company levels, so the associated gains and losses from foreign currency transactions, and interest and dividend income are excluded from the segments’ EBITDA. Our segment EBITDA may not be comparable to similarly titled measures of other companies because other companies may not calculate EBITDA in the same manner. Transactions between reportable segments are accounted for on the same basis as transactions with unaffiliated third parties.
	Business Segment Data
	Condensed Consolidated Statements of Operations
		Unaffiliated		Intersegment			Total			Depreciation and Amortization		Segment EBITDA/
		Revenues		Revenues			Operating					Consolidated
							Revenues					Earnings before
												Income Taxes
		(in millions)
	Three Months Ended June 30, 2014
	Spectra Energy Partners	$	531	$	—		$	531		$	72	$	374
	Distribution	360		—			360			48		112
	Western Canada Transmission & Processing	360		31			391			68		111
	Field Services	—		—			—			—		54
	Total reportable segments	1,251		31			1,282			188		651
	Other	2		17			19			11		(24		)
	Eliminations	—		(48		)	(48		)	—		—
	Depreciation and amortization	—		—			—			—		199
	Interest expense	—		—			—			—		176
	Interest income and other	—		—			—			—		1
	Total consolidated	$	1,253	$	—		$	1,253		$	199	$	253
	Three Months Ended June 30, 2013
	Spectra Energy Partners	$	492	$	—		$	492		$	65	$	358
	Distribution	352		—			352			51		115
	Western Canada Transmission & Processing	373		18			391			70		157
	Field Services	—		—			—			—		46
	Total reportable segments	1,217		18			1,235			186		676
	Other	3		15			18			10		(29		)
	Eliminations	—		(33		)	(33		)	—		—
	Depreciation and amortization	—		—			—			—		196
	Interest expense	—		—			—			—		160
	Interest income and other	—		—			—			—		(3		)
	Total consolidated	$	1,220	$	—		$	1,220		$	196	$	288
	Six Months Ended June 30, 2014
	Spectra Energy Partners	$	1,112	$	—		$	1,112		$	145	$	803
	Distribution	1,078		—			1,078			97		338
	Western Canada Transmission & Processing	901		65			966			135		348
	Field Services	—		—			—			—		184
	Total reportable segments	3,091		65			3,156			377		1,673
	Other	5		32			37			22		(41		)
	Eliminations	—		(97		)	(97		)	—		—
	Depreciation and amortization	—		—			—			—		399
	Interest expense	—		—			—			—		354
	Interest income and other	—		—			—			—		5
	Total consolidated	$	3,096	$	—		$	3,096		$	399	$	884
	Six Months Ended June 30, 2013
	Spectra Energy Partners	$	951	$	—		$	951		$	126	$	705
	Distribution	1,051		—			1,051			102		335
	Western Canada Transmission & Processing	801		33			834			134		347
	Field Services	—		—			—			—		134
	Total reportable segments	2,803		33			2,836			362		1,521
	Other	6		30			36			20		(43		)
	Eliminations	—		(63		)	(63		)	—		—
	Depreciation and amortization	—		—			—			—		382
	Interest expense	—		—			—			—		309
Interest income and other	—		—			—			—		1
Total consolidated	$	2,809	$	—		$	2,809		$	382	$	788

Regulatory_Matters

Regulatory Matters	6 Months Ended
	Jun. 30, 2014
Regulated Operations [Abstract]	'
Regulatory Matters	'
	Regulatory Matters
	Union Gas. In January 2014, Union Gas filed a notice of motion seeking leave to appeal to the Ontario Court of Appeal (Court of Appeal) for the unsuccessful appeal to the Ontario Divisional Court on the OEB’s treatment of 2011 revenues derived from the optimization of our upstream transportation contracts. A decision from the Court of Appeal on the notice of motion was issued in April 2014 granting leave to appeal. In May 2014, Union Gas filed a notice of appeal and a hearing is scheduled for December 2014.
	Union Gas filed an application with the OEB in May 2013 for the annual disposition of the 2012 non-commodity deferral account balances. A decision on that application was issued by the OEB in March 2014. Among other things, the OEB determined that revenues derived from the optimization of Union Gas’ upstream transportation contracts in 2012 will be treated as revenues and included in utility earnings instead of a reduction to gas costs. The decision also denied a proposal to recover certain over-refunds to customers and reduced incentive amounts related to Union Gas’ 2011 energy conservation program. As a result of this OEB decision, Union Gas recognized pre-tax income of $10 million in the first quarter of 2014, comprised of a $32 million increase in Transportation, Storage and Processing of Natural Gas revenues, a $15 million decrease in Distribution of Natural Gas revenues and a $7 million decrease in Other revenues on the Condensed Consolidated Statements of Operations. In addition, the decision also approved the deferral of pension expense for recovery from customers, resulting in pre-tax income of $7 million, recorded as a reduction in Operating, Maintenance and Other expense in the second quarter of 2014.
	On May 2, 2014, Union Gas filed an application with the OEB for the annual disposition of its 2013 non-commodity deferral account balances. The combined impact is a net payable to customers of approximately $21 million which is primarily reflected as Current Liabilities—Other on the Condensed Consolidated Balance Sheets at June 30, 2014. A hearing and decision from the OEB is expected later this year.

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	Income tax expense was $65 million for the three months ended June 30, 2014, compared with $62 million for the same period in 2013. The higher tax expense was driven by the reversal of tax reserves in the 2013 period as a result of favorable Canadian federal income tax legislation enacted in the second quarter of 2013, mostly offset by lower Canadian earnings in 2014.
	Income tax expense was $229 million for the six months ended June 30, 2014, compared with $192 million for the same period in 2013. The higher tax expense was driven primarily by higher earnings and the reversal of tax reserves in the 2013 period.
	The effective income tax rate for the three months ended June 30, 2014 and 2013 was 26% and 22%, respectively, and 26% and 24% for the six-month periods, respectively. The lower effective tax rates in the 2013 periods resulted primarily from the reversal of tax reserves in the second quarter of 2013.
	There was no material net change in unrecognized tax benefits recorded during the six-month period ended June 30, 2014. Although uncertain, we believe it is reasonably possible that the total amount of unrecognized tax benefits could decrease by approximately $15 million to $20 million prior to June 30, 2015.
	In September 2013, the U.S. Treasury and the Internal Revenue Service (IRS) issued final regulations regarding the deduction and capitalization of expenditures related to tangible property (tangible property regulations). The final IRS regulations apply to amounts paid to acquire, produce, or improve tangible property as well as dispositions of such property and are for tax years beginning on or after January 1, 2014. We are currently evaluating the tangible property regulations and awaiting the release of additional regulations and industry specific guidance. Any changes resulting from the tangible property regulations will affect the timing of deducting expenditures for tax purposes and the impact will be reflected in income tax payable or receivable, deferred taxes and cash paid for income taxes. Our earnings will not be impacted.

Earnings_per_Common_Share

Earnings per Common Share	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Earnings per Common Share	'
	Earnings per Common Share
	Basic earnings per common share (EPS) is computed by dividing net income from controlling interests by the weighted-average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income from controlling interests by the diluted weighted-average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as stock options, stock-based performance unit awards and phantom stock awards, were exercised, settled or converted into common stock.
	The following table presents our basic and diluted EPS calculations:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions, except per-share amounts)
	Net income—controlling interests	$	146	$	199	$	565	$	539
	Weighted-average common shares outstanding
	Basic	671		669		671		669
	Diluted	673		671		672		671
	Basic earnings per common share (a)	$	0.22	$	0.3	$	0.84	$	0.81
	Diluted earnings per common share (a)	$	0.22	$	0.3	$	0.84	$	0.8
	—————
	(a) Quarterly earnings-per-share amounts are stand-alone calculations and may not be additive to full-year amounts due to
	rounding.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive Income	'
	Accumulated Other Comprehensive Income
	The following table presents the net of tax changes in Accumulated Other Comprehensive Income (AOCI) by component and amounts reclassified out of AOCI to Net Income, excluding amounts attributable to noncontrolling interests:
		Foreign Currency Translation Adjustments			Pension				Gas Purchase Contract Hedges			Other			Total Accumulated Other Comprehensive Income
					and Post-retirement Benefit Plan Obligations
								(in millions)
	31-Mar-14	$	1,313		$	(297	)		$	(7	)	$	(1	)	$	1,008
	Reclassified to net income	—			—				—			1			1
	Other AOCI activity	220			6				1			—			227
	30-Jun-14	$	1,533		$	(291	)		$	(6	)	$	—		$	1,236
	31-Mar-13	$	1,858		$	(496	)		$	(18	)	$	(4	)	$	1,340
	Reclassified to net income	—			—				1			1			2
	Other AOCI activity	(249		)	10				—			(1		)	(240		)
	30-Jun-13	$	1,609		$	(486	)		$	(17	)	$	(4	)	$	1,102
	31-Dec-13	$	1,557		$	(304	)		$	(11	)	$	(1	)	$	1,241
	Reclassified to net income	—			—				2			1			3
	Other AOCI activity	(24		)	13				3			—			(8		)
	30-Jun-14	$	1,533		$	(291	)		$	(6	)	$	—		$	1,236
	31-Dec-12	$	2,044		$	(507	)		$	(23	)	$	(5	)	$	1,509
	Reclassified to net income	—			—				3			1			4
	Other AOCI activity	(435		)	21				3			—			(411		)
	30-Jun-13	$	1,609		$	(486	)		$	(17	)	$	(4	)	$	1,102
	Reclassifications to Net Income are primarily included in Other Income and Expenses, Net on our Condensed Consolidated Statements of Operations.

Inventory

Inventory	6 Months Ended
	Jun. 30, 2014
Inventory Disclosure [Abstract]	'
Inventory	'
	Inventory
	Inventory consists of natural gas and NGLs held in storage for transmission and processing, and also includes materials and supplies. Natural gas inventories primarily relate to the Distribution segment in Canada and are valued at costs approved by the OEB. The difference between the approved price and the actual cost of gas purchased is recorded as either a receivable or a current liability, as appropriate, for future disposition with customers, subject to approval by the OEB. The remaining inventory is recorded at the lower of cost or market, primarily using average cost. The components of inventory are as follows:
		June 30,		December 31,
		2014		2013
		(in millions)
	Natural gas	$	166	$	155
	NGLs	33		30
	Materials and supplies	78		78
	Total inventory	$	277	$	263

Investments_in_and_Loans_to_Un

Investments in and Loans to Unconsolidated Affiliates	6 Months Ended
	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Investments in and Loans to Unconsolidated Affiliates	'
	Investments in and Loans to Unconsolidated Affiliates
	Our most significant investment in unconsolidated affiliates is our 50% investment in DCP Midstream, which is accounted for under the equity method of accounting. The following represents summary financial information for DCP Midstream, presented at 100%:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions)
	Operating revenues	$	3,541	$	2,861	$	7,456	$	5,473
	Operating expenses	3,387		2,671		7,032		5,121
	Operating income	154		190		424		352
	Net income	92		142		295		262
	Net income attributable to members’ interests	89		78		254		169
	DCP Partners issues, from time to time, limited partner units to the public, which are recorded by DCP Midstream directly to its equity. Our proportionate share of gains from those issuances, totaling $9 million and $7 million in the second quarters of 2014 and 2013, respectively, and $57 million and $50 million during the six-month periods ended June 30, 2014 and 2013, respectively, are reflected in Equity in Earnings of Unconsolidated Affiliates in the Condensed Consolidated Statements of Operations.

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	Goodwill
	We perform our goodwill impairment test annually and evaluate goodwill when events or changes in circumstances indicate that its carrying value may not be recoverable. We completed our annual goodwill impairment test as of April 1, 2014 and no impairments were identified.
	We perform our annual review for goodwill impairment at the reporting unit level, which is identified by assessing whether the components of our operating segments constitute businesses for which discrete financial information is available, whether segment management regularly reviews the operating results of those components and whether the economic and regulatory characteristics are similar. We determined that our reporting units are equivalent to our reportable segments, except for the reporting units of our Western Canada Transmission & Processing reportable segment and our Spectra Energy Partners reportable segment, which are one level below.
	As permitted under accounting guidance on testing goodwill for impairment, we perform either a qualitative assessment or a quantitative assessment of each of our reporting units based on management’s judgment. With respect to our qualitative assessments, we consider events and circumstances specific to us, such as macroeconomic conditions, industry and market considerations, cost factors and overall financial performance, when evaluating whether it is more likely than not that the fair values of our reporting units are less than their respective carrying amounts.
	The following presents changes in goodwill during 2014:
		Goodwill
		(in millions)
	31-Dec-13	$	4,810
	Acquisition of Express-Platte	37
	Foreign currency translation	(6		)
	30-Jun-14	$	4,841
	See Note 2 for discussion of the acquisition of Express-Platte and an adjustment to Goodwill recorded in the first quarter of 2014 related to the acquisition.

Marketable_Securities_and_Rest

Marketable Securities and Restricted Funds	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Marketable Securities and Restricted Funds	'
	Marketable Securities and Restricted Funds
	We routinely invest excess cash and various restricted balances in securities such as commercial paper, bankers acceptances, corporate debt securities, treasury bills and money market funds in the United States and Canada. We do not purchase marketable securities for speculative purposes, therefore we do not have any securities classified as trading securities. While we do not routinely sell marketable securities prior to their scheduled maturity dates, some of our investments may be held and restricted for insurance purposes, so these investments are classified as available-for-sale (AFS) marketable securities as they may occasionally be sold prior to their scheduled maturity dates due to the unexpected timing of cash needs. Initial investments in securities are classified as purchases of the respective type of securities (AFS marketable securities or held-to-maturity (HTM) marketable securities). Maturities of securities are classified within proceeds from sales and maturities of securities in the Condensed Consolidated Statements of Cash Flows.
	AFS Securities. AFS securities are as follows:
		Estimated Fair Value
		30-Jun-14			31-Dec-13
		(in millions)
	Corporate debt securities	$	24		$	18
	Money market funds	1			1
	Total available-for-sale securities	$	25		$	19
	Our AFS securities are classified on the Condensed Consolidated Balance Sheets as follows:
			Estimated Fair Value
			30-Jun-14			31-Dec-13
			(in millions)
	Restricted funds
	Investments and other assets—other		$	1		$	1
	Non-restricted funds
	Current assets—other		—			7
	Investments and other assets—other		24			11
	Total available-for-sale securities		$	25		$	19
	At June 30, 2014, the weighted-average contractual maturity of outstanding AFS securities was two years.
	There were no material gross unrealized holding gains or losses associated with investments in AFS securities at June 30, 2014 or December 31, 2013.
	HTM Securities. All of our HTM securities are restricted funds and are as follows:
			Estimated Fair Value
	Description	Condensed Consolidated Balance Sheet Caption	30-Jun-14			31-Dec-13
			(in millions)
	Bankers acceptances	Current assets—other	$	35		$	35
	Canadian government securities	Current assets—other	33			34
	Money market funds	Current assets—other	4			3
	Canadian government securities	Investments and other assets—other	125			131
	Bankers acceptances	Investments and other assets—other	—			10
	Total held-to-maturity securities		$	197		$	213
	All of our HTM securities are restricted funds pursuant to certain M&N Canada and Express-Platte debt agreements. The funds restricted for M&N Canada, plus future cash from operations that would otherwise be available for distribution to the partners of M&N Canada, are required to be placed in escrow until the balance in escrow is sufficient to fund all future debt service on the M&N Canada 6.90% senior secured notes. There are sufficient funds held in escrow to fund all future debt service on these M&N Canada notes.
	At June 30, 2014, the weighted-average contractual maturity of outstanding HTM securities was one year.
	There were no material gross unrecognized holding gains or losses associated with investments in HTM securities at June 30, 2014 or December 31, 2013.
	Other Restricted Funds. In addition to the portions of the AFS and HTM securities that were restricted funds as described above, we had other restricted funds totaling $20 million at June 30, 2014 and $19 million at December 31, 2013 classified as Current Assets—Other. These restricted funds are related to additional amounts for the M&N Canada debt service requirements and insurance.
	Changes in restricted funds’ balances are presented within Cash Flows from Investing Activities on our Condensed Consolidated Statements of Cash Flows.

Debt_and_Credit_Facilities

Debt and Credit Facilities	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Debt and Credit Facilities	'
	Debt and Credit Facilities
	Available Credit Facilities and Restrictive Debt Covenants
		Expiration	Total		Commercial Paper Outstanding at June 30, 2014		Available
		Date	Credit				Credit
			Facilities				Facilities
			Capacity				Capacity
			(in millions)
	Spectra Energy Capital, LLC (a)	2018	$	1,000	$	220	$	780
	SEP (b)	2018	2,000		549		1,451
	Westcoast Energy Inc. (c)	2016	281		—		281
	Union Gas (d)	2016	375		—		375
	Total		$	3,656	$	769	$	2,887
	___________
	(a)	Revolving credit facility contains a covenant requiring the Spectra Energy Corp consolidated debt-to-total capitalization ratio, as defined in the agreement, to not exceed 65%. Per the terms of the agreement, collateralized debt is excluded from the calculation of the ratio. This ratio was 56% at June 30, 2014.
	(b)	Revolving credit facility contains a covenant that requires SEP to maintain a ratio of total Consolidated Indebtedness-to-Consolidated EBITDA, as defined in the credit agreement, of 5.0 to 1 or less, provided that for three fiscal quarters subsequent to certain acquisitions (such as the November 1, 2013 U.S. Assets Dropdown from Spectra Energy Corp), the ratio may be 5.5 to 1 or less. As of June 30, 2014, this ratio was 3.9 to 1 after giving effect to the U.S. Assets Dropdown.
	(c)	U.S. dollar equivalent at June 30, 2014. The revolving credit facility is 300 million Canadian dollars and contains a covenant that requires the Westcoast Energy Inc. non-consolidated debt-to-total capitalization ratio to not exceed 75%. The ratio was 41% at June 30, 2014.
	(d)	U.S. dollar equivalent at June 30, 2014. The revolving credit facility is 400 million Canadian dollars and contains a covenant that requires the Union Gas debt-to-total capitalization ratio to not exceed 75% and a provision which requires Union Gas to repay all borrowings under the facility for a period of two days during the second quarter of each year. The ratio was 65% at June 30, 2014.
	The issuances of commercial paper, letters of credit and revolving borrowings reduce the amount available under the credit facilities. As of June 30, 2014, there were no letters of credit issued or revolving borrowings outstanding under the credit facilities.
	Our credit agreements contain various covenants, including the maintenance of certain financial ratios. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements. As of June 30, 2014, we were in compliance with those covenants. In addition, our credit agreements allow for acceleration of payments or termination of the agreements due to nonpayment, or in some cases, due to the acceleration of other significant indebtedness of the borrower or some of its subsidiaries. Our debt and credit agreements do not contain provisions that trigger an acceleration of indebtedness based solely on the occurrence of a material adverse change in our financial condition or results of operations.
	Debt Issuances. On June 2, 2014, Union Gas issued 200 million Canadian dollars (approximately $183 million as of the issuance date) of 2.76% unsecured notes due 2021 and 250 million Canadian dollars (approximately $229 million as of the issuance date) of 4.20% unsecured notes due 2044. Net proceeds from the offerings were used for general corporate purposes.
	In January 2014, Spectra Energy Capital, LLC (Spectra Capital) borrowed the full $300 million available under its unsecured term loan agreement. Interest on the borrowing is based on LIBOR (London Interbank Offered Rate) and the borrowing is due in 2018. Net proceeds from the borrowing were used for general corporate purposes.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	The following presents, for each of the fair value hierarchy levels, assets and liabilities that are measured and recorded at fair value on a recurring basis:
	Description	Condensed Consolidated Balance Sheet Caption	30-Jun-14
			Total			Level 1			Level 2			Level 3
			(in millions)
	Corporate debt securities	Cash and cash equivalents	$	73		$	—		$	73		$	—
	Banker acceptances	Cash and cash equivalents	3			—			3			—
	Interest rate swaps	Current assets—other	4			—			4			—
	Corporate debt securities	Investments and other assets—other	24			—			24			—
	Interest rate swaps	Investments and other assets—other	19			—			19			—
	Money market funds	Investments and other assets—other	1			1			—			—
	Total Assets		$	124		$	1		$	123		$	—
	Commodity derivatives	Current liabilities—other	$	6		$	—		$	—		$	6
	Interest rate swaps	Current liabilities—other	3			—			3			—
	Natural gas purchase contracts	Deferred credits and other liabilities—regulatory and other	1			—			—			1
	Commodity derivatives	Deferred credits and other liabilities—regulatory and other	2			—			—			2
	Total Liabilities		$	12		$	—		$	3		$	9
	Description	Condensed Consolidated Balance Sheet Caption	31-Dec-13
			Total			Level 1			Level 2			Level 3
			(in millions)
	Corporate debt securities	Cash and cash equivalents	$	49		$	—		$	49		$	—
	Corporate debt securities	Current assets—other	7			—			7			—
	Interest rate swaps	Current assets—other	8			—			8			—
	Corporate debt securities	Investments and other assets—other	11			—			11			—
	Interest rate swaps	Investments and other assets—other	15			—			15			—
	Money market funds	Investments and other assets—other	1			1			—			—
	Total Assets		$	91		$	1		$	90		$	—
	Natural gas purchase contracts	Deferred credits and other liabilities—regulatory and other	$	3		$	—		$	—		$	3
	Interest rate swaps	Deferred credits and other liabilities—regulatory and other	6			—			6			—
	Total Liabilities		$	9		$	—		$	6		$	3
	The following presents changes in Level 3 liabilities that are measured at fair value on a recurring basis using significant unobservable inputs:
		Three Months						Six Months
		Ended June 30,						Ended June 30,
		2014			2013			2014			2013
		(in millions)
	Derivative liabilities
	Fair value, beginning of period	$	5		$	6		$	3		$	9
	Total realized/unrealized losses (gains):
	Included in earnings	5			—			9			1
	Included in other comprehensive income	(1		)	—			(4		)	(4		)
	Settlements	—			—			1			—
	Fair value, end of period	$	9		$	6		$	9		$	6
	Total losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to liabilities held at the end of the period	$	4		$	—		$	7		$	1
	Level 1
	Level 1 valuations represent quoted unadjusted prices for identical instruments in active markets.
	Level 2 Valuation Techniques
	Fair values of our financial instruments that are actively traded in the secondary market, including our long-term debt, are determined based on market-based prices. These valuations may include inputs such as quoted market prices of the exact or similar instruments, broker or dealer quotations, or alternative pricing sources that may include models or matrix pricing tools, with reasonable levels of price transparency.
	For interest rate swaps, we utilize data obtained from a third-party source for the determination of fair value. Both the future cash flows for the fixed-leg and floating-leg of our swaps are discounted to present value. In addition, credit default swap rates are used to develop the adjustment for credit risk embedded in our positions. We believe that since some of the inputs and assumptions for the calculations of fair value are derived from observable market data, a Level 2 classification is appropriate.
	Level 3 Valuation Techniques
	We do not have significant amounts of assets or liabilities measured and reported using Level 3 valuation techniques, which include the use of pricing models, discounted cash flow methodologies or similar techniques where at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation.
	For natural gas purchases contracts and commodity derivatives, we utilize data obtained from third-party sources for the determination of fair value. The expected future cash flows arising from our swaps are discounted to present value. In addition, credit default swap rates or historical average credit default rates by credit rating are used to develop the adjustment for credit risk embedded in our positions. As these transactions are limited, we believe a Level 3 classification is appropriate.
	Financial Instruments
	The fair values of financial instruments that are recorded and carried at book value are summarized in the following table. Judgment is required in interpreting market data to develop the estimates of fair value. These estimates are not necessarily indicative of the amounts we could have realized in current markets.
		30-Jun-14						31-Dec-13
		Book			Approximate			Book			Approximate
		Value			Fair Value			Value			Fair Value
		(in millions)
	Note receivable, noncurrent (a)	$	71		$	71		$	71		$	71
	Long-term debt, including current maturities (b)	13,625			15,226			13,668			14,701
	__________
	(a)	Included within Investments in and Loans to Unconsolidated Affiliates.
	(b)	Excludes unamortized items and fair value hedge carrying value adjustments.
	The fair value of our long-term debt is determined based on market-based prices as described in the Level 2 valuation technique described above and is classified as Level 2.
The fair values of cash and cash equivalents, restricted cash, short-term investments, accounts receivable, note receivable-noncurrent, accounts payable and commercial paper are not materially different from their carrying amounts because of the short-term nature of these instruments or because the stated rates approximate market rates.
During the 2014 and 2013 periods, there were no material adjustments to assets and liabilities measured at fair value on a nonrecurring basis.

Risk_Management_and_Hedging_Ac

Risk Management and Hedging Activities

6 Months Ended

Jun. 30, 2014

Risk Management And Hedging Activities [Abstract]

'

Risk Management and Hedging Activities

'

Risk Management and Hedging Activities

We are exposed to the impact of market fluctuations in the prices of NGLs and natural gas purchased as a result of our investment in DCP Midstream, the ownership of the NGL marketing operations in western Canada and processing associated with our U.S. pipeline assets. Exposure to interest rate risk exists as a result of the issuance of variable and fixed-rate debt and commercial paper. We are exposed to foreign currency risk from our Canadian operations. We employ established policies and procedures to manage our risks associated with these market fluctuations, which may include the use of derivatives, mostly around interest rate and commodity exposures.

DCP Midstream manages their direct exposure to market prices separate from Spectra Energy, and utilizes various risk management strategies, including the use of commodity derivatives.

Other than interest rate swaps and commodity derivatives described below, we did not have any significant derivatives outstanding during the six months ended June 30, 2014.

Interest Rate Swaps

At June 30, 2014, we had “pay floating—receive fixed” interest rate swaps outstanding with a total notional principal amount of $1,617 million to hedge against changes in the fair value of our fixed-rate debt that arise as a result of changes in market interest rates. These swaps also allow us to transform a portion of the underlying interest payments related to our long-term fixed-rate debt securities into variable-rate interest payments in order to achieve our desired mix of fixed and variable-rate debt.

Information about our interest rate swaps that had netting or rights of offset arrangements are as follows:

June 30, 2014

December 31, 2013

Gross Amounts

Amounts Not

Net

Gross Amounts

Amounts Not

Net

Presented in

Offset in the

Amount

Presented in

Offset in the

Amount

the Condensed

Condensed

the Condensed

Condensed

Consolidated

Consolidated

Consolidated

Consolidated

Balance Sheets

Balance Sheets

Balance Sheets

Balance Sheets

Description

(in millions)

Assets

$

23

$

2

$

21

$

23

$

3

$

20

Liabilities

3

2

1

6

3

3

At June 30, 2014, we had interest rate swaps with another counterparty which were in a liability position of $2 million which could be terminated by the counterparty if one of our credit ratings falls below investment grade. In addition, we had one interest rate swap with a counterparty which was in a liability position of $1 million which could be terminated at any time.

Commodity Derivatives

Effective January 2014, we instituted a commodity price risk management program at Western Canada Transmission & Processing’s Empress NGL business and elected to not apply cash flow hedge accounting.

At June 30, 2014, we had commodity mark-to-market derivatives outstanding with a total notional amount of 129 million gallons. The longest dated commodity derivative contract we currently have expires in 2017.

Information about our commodity derivatives that had netting or rights of offset arrangements are as follows:

June 30, 2014

Gross

Gross

Net Amount Presented in the Condensed Consolidated Balance Sheets

Amounts

Amounts

Offset

Description

(in millions)

Assets

$

140

$

140

$

—

Liabilities

148

140

8

Substantially all of our commodity derivative agreements outstanding at June 30, 2014 have provisions that require collateral to be posted in the amount of the net liability position if one of our credit ratings falls below investment grade.

Information regarding the impacts of commodity derivatives on our Condensed Consolidated Statements of Operations are as follows:

Periods Ended June 30, 2014

Derivatives

Condensed Consolidated Statement of Operations Caption

Three Months

Six Months

(in millions)

Commodity derivatives

Sales of natural gas liquids

$

(4

)

$

(7

)

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Environmental
	We are subject to various U.S. federal, state and local laws and regulations, as well as Canadian federal and provincial laws, regarding air and water quality, hazardous and solid waste disposal and other environmental matters. These laws and regulations can change from time to time, imposing new obligations on us.
	Like others in the energy industry, we and our affiliates are responsible for environmental remediation at various contaminated sites. These include some properties that are part of our ongoing operations, sites formerly owned or used by us, and sites owned by third parties. Remediation typically involves management of contaminated soils and may involve groundwater remediation. Managed in conjunction with relevant federal, state/provincial and local agencies, activities vary with site conditions and locations, remedial requirements, complexity and sharing of responsibility. If remediation activities involve statutory joint and several liability provisions, strict liability, or cost recovery or contribution actions, we or our affiliates could potentially be held responsible for contamination caused by other parties. In some instances, we may share liability associated with contamination with other potentially responsible parties, and may also benefit from contractual indemnities that cover some or all cleanup costs. All of these sites generally are managed in the normal course of business or affiliated operations. We believe there are no matters outstanding that upon resolution will have a material effect on our consolidated results of operations, financial position or cash flows.
	Litigation
	Litigation and Legal Proceedings. We are involved in legal, tax and regulatory proceedings in various forums arising in the ordinary course of business, including matters regarding contract and payment claims, some of which involve substantial monetary amounts. We have insurance coverage for certain of these losses should they be incurred. We believe that the final disposition of these proceedings will not have a material effect on our consolidated results of operations, financial position or cash flows.
	Legal costs related to the defense of loss contingencies are expensed as incurred. We had no material reserves for legal matters recorded as of June 30, 2014 or December 31, 2013 related to litigation.
	Other Commitments and Contingencies
	See Note 16 for a discussion of guarantees and indemnifications.

Guarantees_and_Indemnification

Guarantees and Indemnifications	6 Months Ended
	Jun. 30, 2014
Guarantees [Abstract]	'
Guarantees and Indemnifications	'
	Guarantees and Indemnifications
	We have various financial guarantees and indemnifications which are issued in the normal course of business. As discussed below, these contracts include financial guarantees, stand-by letters of credit, debt guarantees, surety bonds and indemnifications. We enter into these arrangements to facilitate a commercial transaction with a third party by enhancing the value of the transaction to the third party. To varying degrees, these guarantees involve elements of performance and credit risk, which are not included on our Condensed Consolidated Balance Sheets. The possibility of having to perform under these guarantees and indemnifications is largely dependent upon future operations of various subsidiaries, investees and other third parties, or the occurrence of certain future events.
	We have issued performance guarantees to customers and other third parties that guarantee the payment and performance of other parties, including certain non-100%-owned entities. In connection with our spin-off from Duke Energy Corporation (Duke Energy) in 2007, certain guarantees that were previously issued by us were assigned to, or replaced by, Duke Energy as guarantor in 2006. For any remaining guarantees of other Duke Energy obligations, Duke Energy has indemnified us against any losses incurred under these guarantee arrangements. The maximum potential amount of future payments we could have been required to make under these performance guarantees as of June 30, 2014 was approximately $406 million, which has been indemnified by Duke Energy as discussed above. One of these outstanding performance guarantees, which has a maximum potential amount of future payment of $201 million, expires in 2028. The remaining guarantees have no contractual expirations.
	We have also issued joint and several guarantees to some of the Duke/Fluor Daniel (D/FD) project owners, guaranteeing the performance of D/FD under its engineering, procurement and construction contracts and other contractual commitments in place at the time of our spin-off from Duke Energy. D/FD is one of the entities transferred to Duke Energy in connection with our spin-off. Substantially all of these guarantees have no contractual expiration and no stated maximum amount of future payments that we could be required to make. Fluor Enterprises Inc., as 50% owner in D/FD, issued similar joint and several guarantees to the same D/FD project owners.
	Westcoast Energy, Inc. (Westcoast), a 100%-owned subsidiary, has issued performance guarantees to third parties guaranteeing the performance of unconsolidated entities, such as equity method investments, and of entities previously sold by Westcoast to third parties. Those guarantees require Westcoast to make payment to the guaranteed third party upon the failure of such unconsolidated or sold entity to make payment under some of its contractual obligations, such as debt agreements, purchase contracts and leases. Certain guarantees that were previously issued by Westcoast for obligations of entities that remained a part of Duke Energy are considered guarantees of third party performance; however, Duke Energy has indemnified us against any losses incurred under these guarantee arrangements.
	We have entered into various indemnification agreements related to purchase and sale agreements and other types of contractual agreements with vendors and other third parties. These agreements typically cover environmental, litigation and other matters, as well as breaches of representations, warranties and covenants. Typically, claims may be made by third parties for various periods of time depending on the nature of the claim. Our potential exposure under these indemnification agreements can range from a specified amount, such as the purchase price, to an unlimited dollar amount, depending on the nature of the claim and the particular transaction. We are unable to estimate the total potential amount of future payments under these indemnification agreements due to several factors, such as the unlimited exposure under certain guarantees.
	As of June 30, 2014, the amounts recorded for the guarantees and indemnifications described above are not material, both individually and in the aggregate.

Issuances_of_SEP_Units

Issuances of SEP Units	6 Months Ended
	Jun. 30, 2014
Noncontrolling Interest [Abstract]	'
Effects of Change in Noncontrolling Interest Ownership	'
	Issuances of SEP Units
	During the first half of 2014, SEP issued 3.9 million common units to the public, representing limited partner interests, and 80,000 general partner units to Spectra Energy under its continuous offering program. Total net proceeds to SEP were $195 million (net proceeds to Spectra Energy were $191 million). In connection with the issuances of the units, a $47 million gain ($29 million net of tax) to Additional Paid-in Capital and a $144 million increase in Equity-Noncontrolling Interests were recorded in the first half of 2014. The issuances decreased Spectra Energy's ownership in SEP from 84% to 83% at June 30, 2014.
	The following table presents the effects of the issuances of SEP units:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions)
	Net income-controlling interests	$	146	$	199	$	565	$	539
	Increase in additional paid-in capital resulting from issuances of SEP units	19		38		29		38
	Total net income-controlling interests and changes in equity-controlling interests	$	165	$	237	$	594	$	577

Employee_Benefit_Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	Retirement Plans. We have a qualified non-contributory defined benefit (DB) retirement plan for most U.S. employees and non-qualified, non-contributory, unfunded defined benefit plans which cover certain current and former U.S. executives. Our Westcoast subsidiary maintains qualified and non-qualified, contributory and non-contributory, DB and defined contribution (DC) retirement plans covering substantially all employees of our Canadian operations.
	Our policy is to fund our retirement plans, where applicable, on an actuarial basis to provide assets sufficient to meet benefits to be paid to plan participants or as required by legislation or plan terms. We made contributions of $10 million to our U.S. retirement plans in the six months ended June 30, 2014 and $11 million in the same period in 2013. We made total contributions to the Canadian DC and DB plans of $26 million in the six months ended June 30, 2014 and $46 million in the same period in 2013. We anticipate that we will make total contributions of approximately $22 million to the U.S. plans and approximately $40 million to the Canadian plans in 2014.
	Qualified and Non-Qualified Pension Plans—Components of Net Periodic Pension Cost
		Three Months						Six Months
		Ended June 30,						Ended June 30,
		2014			2013			2014			2013
		(in millions)
	U.S.
	Service cost benefit earned	$	4		$	4		$	9		$	9
	Interest cost on projected benefit obligation	6			6			12			11
	Expected return on plan assets	(9		)	(8		)	(19		)	(16		)
	Amortization of loss	3			5			6			10
	Net periodic pension cost	$	4		$	7		$	8		$	14
	Canada
	Service cost benefit earned	$	8		$	8		$	15		$	16
	Interest cost on projected benefit obligation	13			12			26			25
	Expected return on plan assets	(18		)	(16		)	(35		)	(33		)
	Amortization of loss	5			9			11			18
	Amortization of prior service cost	1			1			1			1
	Net periodic pension cost	$	9		$	14		$	18		$	27
	Other Post-Retirement Benefit Plans. We provide certain health care and life insurance benefits for retired employees on a contributory and non-contributory basis. Employees are eligible for these benefits if they have met age and service requirements at retirement, as defined in the plans.
	Other Post-Retirement Benefit Plans—Components of Net Periodic Benefit Cost
		Three Months						Six Months
		Ended June 30,						Ended June 30,
		2014			2013			2014			2013
		(in millions)
	U.S.
	Interest cost on accumulated post-retirement benefit obligation	$	2		$	2		$	4		$	4
	Expected return on plan assets	(1		)	(1		)	(2		)	(2		)
	Amortization of loss	—			1			—			1
	Net periodic other post-retirement benefit cost	$	1		$	2		$	2		$	3
	Canada
	Service cost benefit earned	$	1		$	1		$	2		$	2
	Interest cost on accumulated post-retirement benefit obligation	2			1			3			3
	Net periodic other post-retirement benefit cost	$	3		$	2		$	5		$	5
	Retirement/Savings Plan
	In addition to the retirement plans described above, we also have defined contribution employee savings plans available to both U.S. and Canadian employees. Employees may participate in a matching contribution where we match a certain percentage of before-tax employee contributions of up to 6% of eligible pay per pay period for U.S. employees and up to 5% of eligible pay per pay period for Canadian employees. We expensed pre-tax employer matching contributions of $4 million in both the three-month periods ended June 30, 2014 and 2013 and $7 million in both the six-month periods ended June 30, 2014 and 2013 for U.S. employees. We expensed pre-tax employer matching contributions of $3 million in both the three-month periods ended June 30, 2014 and 2013 and $6 million in both the six-month periods ended June 30, 2014 and 2013 for Canadian employees.

Consolidating_Financial_Inform

Consolidating Financial Information	6 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Consolidating Financial Information	'
	Consolidating Financial Information
	Spectra Energy Corp has agreed to fully and unconditionally guarantee the payment of principal and interest under all series of notes outstanding under the Senior Indenture of Spectra Capital, a 100%-owned, consolidated subsidiary. In accordance with Securities and Exchange Commission (SEC) rules, the following condensed consolidating financial information is presented. The information shown for Spectra Energy Corp and Spectra Capital is presented utilizing the equity method of accounting for investments in subsidiaries, as required. The non-guarantor subsidiaries column represents all consolidated subsidiaries of Spectra Capital. This information should be read in conjunction with our accompanying Condensed Consolidated Financial Statements and notes thereto.
	Spectra Energy Corp
	Condensed Consolidating Statements of Operations
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Three Months Ended June 30, 2014
	Total operating revenues	$	—		$	—		$	1,253		$	—		$	1,253
	Total operating expenses	—			1			914			—			915
	Operating income (loss)	—			(1		)	339			—			338
	Equity in earnings of unconsolidated affiliates	—			—			85			—			85
	Equity in earnings of consolidated subsidiaries	125			264			—			(389		)	—
	Other income and expenses, net	(1		)	—			7			—			6
	Interest expense	—			66			110			—			176
	Earnings before income taxes	124			197			321			(389		)	253
	Income tax expense (benefit)	(22		)	72			15			—			65
	Net income	146			125			306			(389		)	188
	Net income—noncontrolling interests	—			—			42			—			42
	Net income—controlling interests	$	146		$	125		$	264		$	(389	)	$	146
	Three Months Ended June 30, 2013
	Total operating revenues	$	—		$	—		$	1,220		$	—		$	1,220
	Total operating expenses	1			—			865			—			866
	Operating income (loss)	(1		)	—			355			—			354
	Equity in earnings of unconsolidated affiliates	—			—			72			—			72
	Equity in earnings of consolidated subsidiaries	194			317			—			(511		)	—
	Other income and expenses, net	(1		)	1			22			—			22
	Interest expense	—			51			109			—			160
	Earnings before income taxes	192			267			340			(511		)	288
	Income tax expense (benefit)	(7		)	73			(4		)	—			62
	Net income	199			194			344			(511		)	226
	Net income—noncontrolling interests	—			—			27			—			27
	Net income—controlling interests	$	199		$	194		$	317		$	(511	)	$	199
	Spectra Energy Corp
	Condensed Consolidating Statements of Operations
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Six Months Ended June 30, 2014
	Total operating revenues	$	—		$	—		$	3,097		$	(1	)	$	3,096
	Total operating expenses	4			1			2,115			(1		)	2,119
	Operating income (loss)	(4		)	(1		)	982			—			977
	Equity in earnings of unconsolidated affiliates	—			—			246			—			246
	Equity in earnings of consolidated subsidiaries	540			899			—			(1,439		)	—
	Other income and expenses, net	(2		)	1			16			—			15
	Interest expense	—			131			223			—			354
	Earnings before income taxes	534			768			1,021			(1,439		)	884
	Income tax expense (benefit)	(31		)	228			32			—			229
	Net income	565			540			989			(1,439		)	655
	Net income—noncontrolling interests	—			—			90			—			90
	Net income—controlling interests	$	565		$	540		$	899		$	(1,439	)	$	565
	Six Months Ended June 30, 2013
	Total operating revenues	$	—		$	—		$	2,810		$	(1	)	$	2,809
	Total operating expenses	3			—			1,947			(1		)	1,949
	Operating income (loss)	(3		)	—			863			—			860
	Equity in earnings of unconsolidated affiliates	—			—			182			—			182
	Equity in earnings of consolidated subsidiaries	531			826			—			(1,357		)	—
	Other income and expenses, net	(3		)	4			54			—			55
	Interest expense	—			99			210			—			309
Earnings before income taxes	525			731			889			(1,357		)	788
Income tax expense (benefit)	(14		)	200			6			—			192
Net income	539			531			883			(1,357		)	596
Net income—noncontrolling interests	—			—			57			—			57
Net income—controlling interests	$	539		$	531		$	826		$	(1,357	)	$	539
Spectra Energy Corp
Condensed Consolidating Statements of Comprehensive Income
(Unaudited)
(In millions)
	Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
	Energy			Capital			Subsidiaries
	Corp
Three Months Ended June 30, 2014
Net income	$	146		$	125		$	306		$	(389	)	$	188
Other comprehensive income	2			—			229			—			231
Total comprehensive income, net of tax	148			125			535			(389		)	419
Less: comprehensive income—noncontrolling interests	—			—			45			—			45
Comprehensive income—controlling interests	$	148		$	125		$	490		$	(389	)	$	374
Three Months Ended June 30, 2013
Net income	$	199		$	194		$	344		$	(511	)	$	226
Other comprehensive income (loss)	3			1			(244		)	—			(240		)
Total comprehensive income (loss), net of tax	202			195			100			(511		)	(14		)
Less: comprehensive income—noncontrolling interests	—			—			25			—			25
Comprehensive income (loss)—controlling interests	$	202		$	195		$	75		$	(511	)	$	(39	)
Six Months Ended June 30, 2014
Net income	$	565		$	540		$	989		$	(1,439	)	$	655
Other comprehensive income (loss)	4			—			(10		)	—			(6		)
Total comprehensive income, net of tax	569			540			979			(1,439		)	649
Less: comprehensive income—noncontrolling interests	—			—			89			—			89
Comprehensive income—controlling interests	$	569		$	540		$	890		$	(1,439	)	$	560
Six Months Ended June 30, 2013
Net income	$	539		$	531		$	883		$	(1,357	)	$	596
Other comprehensive income (loss)	7			1			(420		)	—			(412		)
Total comprehensive income, net of tax	546			532			463			(1,357		)	184
Less: comprehensive income—noncontrolling interests	—			—			52			—			52
Comprehensive income—controlling interests	$	546		$	532		$	411		$	(1,357	)	$	132
Spectra Energy Corp
Condensed Consolidating Balance Sheet
June 30, 2014
(Unaudited)
(In millions)
	Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
	Energy			Capital			Subsidiaries
	Corp
Cash and cash equivalents	$	—		$	2		$	298		$	—		$	300
Receivables—consolidated subsidiaries	20			—			9			(29		)	—
Receivables—other	1			—			1,221			—			1,222
Other current assets	15			11			657			—			683
Total current assets	36			13			2,185			(29		)	2,205
Investments in and loans to unconsolidated	—			—			2,803			—			2,803
affiliates
Investments in consolidated subsidiaries	14,574			20,993			—			(35,567		)	—
Advances receivable—consolidated subsidiaries	—			4,417			755			(5,172		)	—
Notes receivable—consolidated subsidiaries	—			—			3,215			(3,215		)	—
Goodwill	—			—			4,841			—			4,841
Other assets	42			30			326			—			398
Property, plant and equipment, net	—			—			22,260			—			22,260
Regulatory assets and deferred debits	3			15			1,421			—			1,439
Total Assets	$	14,655		$	25,468		$	37,806		$	(43,983	)	$	33,946
Accounts payable—other	$	3		$	1		$	514		$	—		$	518
Accounts payable—consolidated subsidiaries	—			11			18			(29		)	—
Commercial paper	—			220			549			—			769
Short-term borrowings—consolidated	—			415			—			(415		)	—
subsidiaries
Taxes accrued	2			—			101			—			103
Current maturities of long-term debt	—			408			88			—			496
Other current liabilities	64			75			1,131			—			1,270
Total current liabilities	69			1,130			2,401			(444		)	3,156
Long-term debt	—			2,899			10,242			—			13,141
Advances payable—consolidated subsidiaries	5,172			—			—			(5,172		)	—
Notes payable—consolidated subsidiaries	—			2,800			—			(2,800		)	—
Deferred credits and other liabilities	762			4,065			1,819			—			6,646
Preferred stock of subsidiaries	—			—			258			—			258
Equity
Controlling interests	8,652			14,574			20,993			(35,567		)	8,652
Noncontrolling interests	—			—			2,093			—			2,093
Total equity	8,652			14,574			23,086			(35,567		)	10,745
Total Liabilities and Equity	$	14,655		$	25,468		$	37,806		$	(43,983	)	$	33,946
Spectra Energy Corp
Condensed Consolidating Balance Sheet
December 31, 2013
(Unaudited)
(In millions)
	Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
	Energy			Capital			Subsidiaries
	Corp
Cash and cash equivalents	$	—		$	12		$	189		$	—		$	201
Receivables—consolidated subsidiaries	176			394			—			(570		)	—
Receivables—other	1			—			1,335			—			1,336
Other current assets	40			15			489			—			544
Total current assets	217			421			2,013			(570		)	2,081
Investments in and loans to unconsolidated	—			—			3,043			—			3,043
affiliates
Investments in consolidated subsidiaries	13,244			19,403			—			(32,647		)	—
Advances receivable—consolidated subsidiaries	—			4,038			677			(4,715		)	—
Notes receivable—consolidated subsidiaries	—			—			3,215			(3,215		)	—
Goodwill	—			—			4,810			—			4,810
Other assets	39			30			316			—			385
Property, plant and equipment, net	—			—			21,829			—			21,829
Regulatory assets and deferred debits	3			17			1,365			—			1,385
Total Assets	$	13,503		$	23,909		$	37,268		$	(41,147	)	$	33,533
Accounts payable—other	$	4		$	—		$	436		$	—		$	440
Accounts payable—consolidated subsidiaries	89			—			481			(570		)	—
Commercial paper	—			344			688			—			1,032
Short-term borrowings—consolidated	—			415			—			(415		)	—
subsidiaries
Taxes accrued	4			—			68			—			72
Current maturities of long-term debt	—			557			640			—			1,197
Other current liabilities	81			75			1,142			—			1,298
Total current liabilities	178			1,391			3,455			(985		)	4,039
Long-term debt	—			2,605			9,883			—			12,488
Advances payable—consolidated subsidiaries	4,715			—			—			(4,715		)	—
Notes payable—consolidated subsidiaries	—			2,800			—			(2,800		)	—
Deferred credits and other liabilities	116			3,869			2,440			—			6,425
Preferred stock of subsidiaries	—			—			258			—			258
Equity
Controlling interests	8,494			13,244			19,403			(32,647		)	8,494
Noncontrolling interests	—			—			1,829			—			1,829
Total equity	8,494			13,244			21,232			(32,647		)	10,323
Total Liabilities and Equity	$	13,503		$	23,909		$	37,268		$	(41,147	)	$	33,533
Spectra Energy Corp
Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2014
(Unaudited)
(In millions)
	Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
	Energy			Capital			Subsidiaries
	Corp
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	565		$	540		$	989		$	(1,439	)	$	655
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	—			—			405			—			405
Equity in earnings of unconsolidated affiliates	—			—			(246		)	—			(246		)
Equity in earnings of consolidated subsidiaries	(540		)	(899		)	—			1,439			—
Distributions received from unconsolidated affiliates	—			—			199			—			199
Other	(36		)	229			3			—			196
Net cash provided by (used in) operating activities	(11		)	(130		)	1,350			—			1,209
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	—			—			(833		)	—			(833		)
Investments in and loans to unconsolidated	—			—			(30		)	—			(30		)
affiliates
Purchases of held-to-maturity securities	—			—			(437		)	—			(437		)
Proceeds from sales and maturities of held-to-maturity securities	—			—			453			—			453
Purchases of available-for-sale securities	—			—			(13		)	—			(13		)
Proceeds from sales and maturities of available-for-sale securities	—			—			7			—			7
Distributions received from unconsolidated	—			—			242			—			242
affiliates
Advances from affiliates	85			91			—			(176		)	—
Other changes in restricted funds	—			—			(1		)	—			(1		)
Net cash provided by (used in) investing activities	85			91			(612		)	(176		)	(612		)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	—			300			412			—			712
Payments for the redemption of long-term debt	—			(148		)	(588		)	—			(736		)
Net decrease in commercial paper	—			(124		)	(132		)	—			(256		)
Distributions to noncontrolling interests	—			—			(81		)	—			(81		)
Contributions from noncontrolling interests	—			—			112			—			112
Dividends paid on common stock	(453		)	—			—			—			(453		)
Proceeds from the issuance of SEP common units	—			—			191			—			191
Distributions and advances from (to) affiliates	366			1			(543		)	176			—
Other	13			—			(1		)	—			12
Net cash provided by (used in) financing activities	(74		)	29			(630		)	176			(499		)
Effect of exchange rate changes on cash	—			—			1			—			1
Net increase (decrease) in cash and cash equivalents	—			(10		)	109			—			99
Cash and cash equivalents at beginning of period	—			12			189			—			201
Cash and cash equivalents at end of period	$	—		$	2		$	298		$	—		$	300
Spectra Energy Corp
Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2013
(Unaudited)
(In millions)
	Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
	Energy			Capital			Subsidiaries
	Corp
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	539		$	531		$	883		$	(1,357	)	$	596
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	—			—			388			—			388
Equity in earnings of unconsolidated affiliates	—			—			(182		)	—			(182		)
Equity in earnings of consolidated subsidiaries	(531		)	(826		)	—			1,357			—
Distributions received from unconsolidated affiliates	—			—			147			—			147
Other	(7		)	335			(77		)	—			251
Net cash provided by operating activities	1			40			1,159			—			1,200
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	—			—			(959		)	—			(959		)
Investments in and loans to unconsolidated affiliates	—			—			(168		)	—			(168		)
Acquisitions, net of cash acquired	—			—			(1,254		)	—			(1,254		)
Purchases of held-to-maturity securities	—			—			(456		)	—			(456		)
Proceeds from sales and maturities of held-to-maturity securities	—			—			463			—			463
Purchases of available-for-securities	—			—			(2,899		)	—			(2,899		)
Proceeds from sales and maturities of available-for-sale securities	—			—			2,722			—			2,722
Distributions received from unconsolidated affiliates	—			—			13			—			13
Advances from (to) affiliates	156			(589		)	—			433			—
Other changes in restricted funds	—			—			1			—			1
Other	—			—			2			—			2
Net cash provided by (used in) investing activities	156			(589		)	(2,535		)	433			(2,535		)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	—			1,848			—			—			1,848
Payments for the redemption of long-term debt	—			(495		)	(51		)	—			(546		)
Net increase (decrease) in commercial paper	—			615			(175		)	—			440
Net decrease in short-term borrowings—consolidated subsidiaries	—			(9		)	—			9			—
Distributions to noncontrolling interests	—			—			(69		)	—			(69		)
Dividends paid on common stock	(412		)	—			—			—			(412		)
Proceeds from the issuance of SEP common units	—			—			190			—			190
Distributions and advances from (to) affiliates	240			(1,405		)	1,607			(442		)	—
Other	15			(6		)	1			—			10
Net cash provided by (used in) financing activities	(157		)	548			1,503			(433		)	1,461
Effect of exchange rate changes on cash	—			—			(3		)	—			(3		)
Net increase (decrease) in cash and cash equivalents	—			(1		)	124			—			123
Cash and cash equivalents at beginning of period	—			3			91			—			94
Cash and cash equivalents at end of period	$	—		$	2		$	215		$	—		$	217

New_Accounting_Pronouncements

New Accounting Pronouncements	6 Months Ended
	Jun. 30, 2014
Accounting Changes and Error Corrections [Abstract]	'
New Accounting Pronouncements	'
	New Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” which supersedes the revenue recognition requirements of “Revenue Recognition (Topic 605)” and clarifies the principles of recognizing revenue. This ASU is effective for us January 1, 2017 and is to be applied retrospectively. We are currently evaluating this ASU and its potential impact on us.
	In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." This ASU revises the definition of discontinued operations by limiting discontinued operations reporting to disposals of components of an entity that represent strategic shifts that have or will have a major effect on an entity’s operations and financial results, removing the lack of continuing involvement criteria and requiring discontinued operations reporting for the disposal of an equity method investment that meets the definition of discontinued operations. The update also requires expanded disclosures for discontinued operations, and disclosure of pretax profit or loss of certain individually significant components of an entity that do not qualify for discontinued operations reporting. This ASU is effective for us on January 1, 2015 and is to be applied prospectively. We do not expect the adoption of the provisions of this ASU to have any impact on our consolidated results of operations, financial position or cash flows.
	In 2013, the FASB issued ASU 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a Consensus of the FASB Emerging Issues Task Force),” which was issued to eliminate diversity in practice. This ASU requires entities to net unrecognized tax benefits against all same-jurisdiction net operating losses or tax credit carryforwards that would be used to settle the position with a tax authority. We adopted this standard on January 1, 2014. The adoption of this ASU did not have a material impact on our consolidated results of operations, financial position or cash flows.

Significant_Accounting_Policie

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Goodwill and Intangible Assets, Policy [Policy Text Block]	'
	We perform our goodwill impairment test annually and evaluate goodwill when events or changes in circumstances indicate that its carrying value may not be recoverable. We completed our annual goodwill impairment test as of April 1, 2014 and no impairments were identified.
	We perform our annual review for goodwill impairment at the reporting unit level, which is identified by assessing whether the components of our operating segments constitute businesses for which discrete financial information is available, whether segment management regularly reviews the operating results of those components and whether the economic and regulatory characteristics are similar. We determined that our reporting units are equivalent to our reportable segments, except for the reporting units of our Western Canada Transmission & Processing reportable segment and our Spectra Energy Partners reportable segment, which are one level below.
	As permitted under accounting guidance on testing goodwill for impairment, we perform either a qualitative assessment or a quantitative assessment of each of our reporting units based on management’s judgment. With respect to our qualitative assessments, we consider events and circumstances specific to us, such as macroeconomic conditions, industry and market considerations, cost factors and overall financial performance, when evaluating whether it is more likely than not that the fair values of our reporting units are less than their respective carrying amounts.
Use of Estimates	'
	Use of Estimates. To conform with generally accepted accounting principles (GAAP) in the United States, we make estimates and assumptions that affect the amounts reported in the Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements. Although these estimates are based on our best available knowledge at the time, actual results could differ.
Earnings Per Share	'
	Basic earnings per common share (EPS) is computed by dividing net income from controlling interests by the weighted-average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income from controlling interests by the diluted weighted-average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as stock options, stock-based performance unit awards and phantom stock awards, were exercised, settled or converted into common stock.
Inventory, Policy	'
	Inventory consists of natural gas and NGLs held in storage for transmission and processing, and also includes materials and supplies. Natural gas inventories primarily relate to the Distribution segment in Canada and are valued at costs approved by the OEB. The difference between the approved price and the actual cost of gas purchased is recorded as either a receivable or a current liability, as appropriate, for future disposition with customers, subject to approval by the OEB. The remaining inventory is recorded at the lower of cost or market, primarily using average cost.
Fair Value Measurement	'
	Level 1
	Level 1 valuations represent quoted unadjusted prices for identical instruments in active markets.
	Level 2 Valuation Techniques
	Fair values of our financial instruments that are actively traded in the secondary market, including our long-term debt, are determined based on market-based prices. These valuations may include inputs such as quoted market prices of the exact or similar instruments, broker or dealer quotations, or alternative pricing sources that may include models or matrix pricing tools, with reasonable levels of price transparency.
	For interest rate swaps, we utilize data obtained from a third-party source for the determination of fair value. Both the future cash flows for the fixed-leg and floating-leg of our swaps are discounted to present value. In addition, credit default swap rates are used to develop the adjustment for credit risk embedded in our positions. We believe that since some of the inputs and assumptions for the calculations of fair value are derived from observable market data, a Level 2 classification is appropriate.
	Level 3 Valuation Techniques
	We do not have significant amounts of assets or liabilities measured and reported using Level 3 valuation techniques, which include the use of pricing models, discounted cash flow methodologies or similar techniques where at least one significant model assumption or input is unobservable. Level 3 financial instruments also include those for which the determination of fair value requires significant management judgment or estimation.
	For natural gas purchases contracts and commodity derivatives, we utilize data obtained from third-party sources for the determination of fair value. The expected future cash flows arising from our swaps are discounted to present value. In addition, credit default swap rates or historical average credit default rates by credit rating are used to develop the adjustment for credit risk embedded in our positions. As these transactions are limited, we believe a Level 3 classification is appropriate.

Acquisition_of_ExpressPlatte_T

Acquisition of Express-Platte (Tables)	6 Months Ended
	Jun. 30, 2014
Acquisition of Express-Platte [Abstract]	'
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	'
	The following table summarizes the fair values of the assets and liabilities acquired as of the date of the acquisition.
		Purchase Price
		Allocation
		(in millions)
	Cash purchase price	$	1,250
	Working capital and other purchase adjustments	71
	Total	1,321
	Cash	67
	Receivables	25
	Other current assets	9
	Property, plant and equipment	1,251
	Accounts payable	(18		)
	Other current liabilities	(17		)
	Deferred credits and other liabilities	(259		)
	Long-term debt, including current portion	(260		)
	Total assets acquired/liabilities assumed	798
	Goodwill	$	523

Business_Segments_Tables

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2014
Segment Reporting [Abstract]	'
Business Segment Data - Condensed Consolidated Statements of Operations	'
	Business Segment Data
	Condensed Consolidated Statements of Operations
		Unaffiliated		Intersegment			Total			Depreciation and Amortization		Segment EBITDA/
		Revenues		Revenues			Operating					Consolidated
							Revenues					Earnings before
												Income Taxes
		(in millions)
	Three Months Ended June 30, 2014
	Spectra Energy Partners	$	531	$	—		$	531		$	72	$	374
	Distribution	360		—			360			48		112
	Western Canada Transmission & Processing	360		31			391			68		111
	Field Services	—		—			—			—		54
	Total reportable segments	1,251		31			1,282			188		651
	Other	2		17			19			11		(24		)
	Eliminations	—		(48		)	(48		)	—		—
	Depreciation and amortization	—		—			—			—		199
	Interest expense	—		—			—			—		176
	Interest income and other	—		—			—			—		1
	Total consolidated	$	1,253	$	—		$	1,253		$	199	$	253
	Three Months Ended June 30, 2013
	Spectra Energy Partners	$	492	$	—		$	492		$	65	$	358
	Distribution	352		—			352			51		115
	Western Canada Transmission & Processing	373		18			391			70		157
	Field Services	—		—			—			—		46
	Total reportable segments	1,217		18			1,235			186		676
	Other	3		15			18			10		(29		)
	Eliminations	—		(33		)	(33		)	—		—
	Depreciation and amortization	—		—			—			—		196
	Interest expense	—		—			—			—		160
	Interest income and other	—		—			—			—		(3		)
	Total consolidated	$	1,220	$	—		$	1,220		$	196	$	288
	Six Months Ended June 30, 2014
	Spectra Energy Partners	$	1,112	$	—		$	1,112		$	145	$	803
	Distribution	1,078		—			1,078			97		338
	Western Canada Transmission & Processing	901		65			966			135		348
	Field Services	—		—			—			—		184
	Total reportable segments	3,091		65			3,156			377		1,673
	Other	5		32			37			22		(41		)
	Eliminations	—		(97		)	(97		)	—		—
	Depreciation and amortization	—		—			—			—		399
	Interest expense	—		—			—			—		354
	Interest income and other	—		—			—			—		5
	Total consolidated	$	3,096	$	—		$	3,096		$	399	$	884
	Six Months Ended June 30, 2013
	Spectra Energy Partners	$	951	$	—		$	951		$	126	$	705
	Distribution	1,051		—			1,051			102		335
	Western Canada Transmission & Processing	801		33			834			134		347
	Field Services	—		—			—			—		134
	Total reportable segments	2,803		33			2,836			362		1,521
	Other	6		30			36			20		(43		)
	Eliminations	—		(63		)	(63		)	—		—
	Depreciation and amortization	—		—			—			—		382
	Interest expense	—		—			—			—		309
	Interest income and other	—		—			—			—		1
	Total consolidated	$	2,809	$	—		$	2,809		$	382	$	788

Earnings_per_Common_Share_Tabl

Earnings per Common Share (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Basic and Diluted EPS Calculations	'
	The following table presents our basic and diluted EPS calculations:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions, except per-share amounts)
	Net income—controlling interests	$	146	$	199	$	565	$	539
	Weighted-average common shares outstanding
	Basic	671		669		671		669
	Diluted	673		671		672		671
	Basic earnings per common share (a)	$	0.22	$	0.3	$	0.84	$	0.81
	Diluted earnings per common share (a)	$	0.22	$	0.3	$	0.84	$	0.8
	—————
	(a) Quarterly earnings-per-share amounts are stand-alone calculations and may not be additive to full-year amounts due to
	rounding.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Schedule of Accumulated Other Comprehensive Income	'
	The following table presents the net of tax changes in Accumulated Other Comprehensive Income (AOCI) by component and amounts reclassified out of AOCI to Net Income, excluding amounts attributable to noncontrolling interests:
		Foreign Currency Translation Adjustments			Pension				Gas Purchase Contract Hedges			Other			Total Accumulated Other Comprehensive Income
					and Post-retirement Benefit Plan Obligations
								(in millions)
	31-Mar-14	$	1,313		$	(297	)		$	(7	)	$	(1	)	$	1,008
	Reclassified to net income	—			—				—			1			1
	Other AOCI activity	220			6				1			—			227
	30-Jun-14	$	1,533		$	(291	)		$	(6	)	$	—		$	1,236
	31-Mar-13	$	1,858		$	(496	)		$	(18	)	$	(4	)	$	1,340
	Reclassified to net income	—			—				1			1			2
	Other AOCI activity	(249		)	10				—			(1		)	(240		)
	30-Jun-13	$	1,609		$	(486	)		$	(17	)	$	(4	)	$	1,102
	31-Dec-13	$	1,557		$	(304	)		$	(11	)	$	(1	)	$	1,241
	Reclassified to net income	—			—				2			1			3
	Other AOCI activity	(24		)	13				3			—			(8		)
	30-Jun-14	$	1,533		$	(291	)		$	(6	)	$	—		$	1,236
	31-Dec-12	$	2,044		$	(507	)		$	(23	)	$	(5	)	$	1,509
	Reclassified to net income	—			—				3			1			4
	Other AOCI activity	(435		)	21				3			—			(411		)
	30-Jun-13	$	1,609		$	(486	)		$	(17	)	$	(4	)	$	1,102

Inventory_Tables

Investments in and Loans to Unconsolidated Affiliates (Tables)	6 Months Ended
	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Summarized Statements of Operations of Unconsolidated Affiliates Presented at 100 Percent	'
	The following represents summary financial information for DCP Midstream, presented at 100%:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions)
	Operating revenues	$	3,541	$	2,861	$	7,456	$	5,473
	Operating expenses	3,387		2,671		7,032		5,121
	Operating income	154		190		424		352
	Net income	92		142		295		262
	Net income attributable to members’ interests	89		78		254		169

Investments_in_and_Loans_to_Un1

Investments in and Loans to Unconsolidated Affiliates (Tables)	6 Months Ended
	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Summarized Statements of Operations of Unconsolidated Affiliates Presented at 100 Percent	'
	The following represents summary financial information for DCP Midstream, presented at 100%:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions)
	Operating revenues	$	3,541	$	2,861	$	7,456	$	5,473
	Operating expenses	3,387		2,671		7,032		5,121
	Operating income	154		190		424		352
	Net income	92		142		295		262
	Net income attributable to members’ interests	89		78		254		169

Goodwill_Tables

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes in Goodwill	'
	The following presents changes in goodwill during 2014:
		Goodwill
		(in millions)
	31-Dec-13	$	4,810
	Acquisition of Express-Platte	37
	Foreign currency translation	(6		)
	30-Jun-14	$	4,841

Marketable_Securities_and_Rest1

Marketable Securities and Restricted Funds (Tables)	6 Months Ended
	Jun. 30, 2014
Investments, Debt and Equity Securities [Abstract]	'
Estimated Fair Values of Available for Sale Securities	'
	AFS Securities. AFS securities are as follows:
		Estimated Fair Value
		30-Jun-14			31-Dec-13
		(in millions)
	Corporate debt securities	$	24		$	18
	Money market funds	1			1
	Total available-for-sale securities	$	25		$	19
Restricted and Nonrestricted AFS Securities by Balance Sheet Classification	'
	Our AFS securities are classified on the Condensed Consolidated Balance Sheets as follows:
			Estimated Fair Value
			30-Jun-14			31-Dec-13
			(in millions)
	Restricted funds
	Investments and other assets—other		$	1		$	1
	Non-restricted funds
	Current assets—other		—			7
	Investments and other assets—other		24			11
	Total available-for-sale securities		$	25		$	19
	The fair values of financial instruments that are recorded and carried at book value are summarized in the following table. Judgment is required in interpreting market data to develop the estimates of fair value. These estimates are not necessarily indicative of the amounts we could have realized in current markets.
		30-Jun-14						31-Dec-13
		Book			Approximate			Book		Approximate
		Value			Fair Value			Value		Fair Value
		(in millions)
	Note receivable, noncurrent (a)	$	71		$	71		$	71	$	71
	Long-term debt, including current maturities (b)	13,625			15,226			13,668		14,701
	__________
	(a)	Included within Investments in and Loans to Unconsolidated Affiliates.
	(b)	Excludes unamortized items and fair value hedge carrying value adjustments.
Estimated Fair Values of Held to Maturity Marketable Securities	'
	HTM Securities. All of our HTM securities are restricted funds and are as follows:
			Estimated Fair Value
	Description	Condensed Consolidated Balance Sheet Caption	30-Jun-14			31-Dec-13
			(in millions)
	Bankers acceptances	Current assets—other	$	35		$	35
	Canadian government securities	Current assets—other	33			34
	Money market funds	Current assets—other	4			3
	Canadian government securities	Investments and other assets—other	125			131
	Bankers acceptances	Investments and other assets—other	—			10
	Total held-to-maturity securities		$	197		$	213

Debt_and_Credit_Facilities_Tab

Debt and Credit Facilities (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Available Credit Facilities and Restrictive Debt Covenants	'
	Available Credit Facilities and Restrictive Debt Covenants
		Expiration	Total		Commercial Paper Outstanding at June 30, 2014		Available
		Date	Credit				Credit
			Facilities				Facilities
			Capacity				Capacity
			(in millions)
	Spectra Energy Capital, LLC (a)	2018	$	1,000	$	220	$	780
	SEP (b)	2018	2,000		549		1,451
	Westcoast Energy Inc. (c)	2016	281		—		281
	Union Gas (d)	2016	375		—		375
	Total		$	3,656	$	769	$	2,887
	___________
	(a)	Revolving credit facility contains a covenant requiring the Spectra Energy Corp consolidated debt-to-total capitalization ratio, as defined in the agreement, to not exceed 65%. Per the terms of the agreement, collateralized debt is excluded from the calculation of the ratio. This ratio was 56% at June 30, 2014.
	(b)	Revolving credit facility contains a covenant that requires SEP to maintain a ratio of total Consolidated Indebtedness-to-Consolidated EBITDA, as defined in the credit agreement, of 5.0 to 1 or less, provided that for three fiscal quarters subsequent to certain acquisitions (such as the November 1, 2013 U.S. Assets Dropdown from Spectra Energy Corp), the ratio may be 5.5 to 1 or less. As of June 30, 2014, this ratio was 3.9 to 1 after giving effect to the U.S. Assets Dropdown.
	(c)	U.S. dollar equivalent at June 30, 2014. The revolving credit facility is 300 million Canadian dollars and contains a covenant that requires the Westcoast Energy Inc. non-consolidated debt-to-total capitalization ratio to not exceed 75%. The ratio was 41% at June 30, 2014.
	(d)	U.S. dollar equivalent at June 30, 2014. The revolving credit facility is 400 million Canadian dollars and contains a covenant that requires the Union Gas debt-to-total capitalization ratio to not exceed 75% and a provision which requires Union Gas to repay all borrowings under the facility for a period of two days during the second quarter of each year. The ratio was 65% at June 30, 2014.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Changes in Level 3 Assets and Liabilities that are Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs	'
	The following presents changes in Level 3 liabilities that are measured at fair value on a recurring basis using significant unobservable inputs:
		Three Months						Six Months
		Ended June 30,						Ended June 30,
		2014			2013			2014			2013
		(in millions)
	Derivative liabilities
	Fair value, beginning of period	$	5		$	6		$	3		$	9
	Total realized/unrealized losses (gains):
	Included in earnings	5			—			9			1
	Included in other comprehensive income	(1		)	—			(4		)	(4		)
	Settlements	—			—			1			—
	Fair value, end of period	$	9		$	6		$	9		$	6
	Total losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to liabilities held at the end of the period	$	4		$	—		$	7		$	1
Assets and Liabilities Measured at Fair Value on Recurring Basis with Fair Value Hierarchy Levels	'
	The following presents, for each of the fair value hierarchy levels, assets and liabilities that are measured and recorded at fair value on a recurring basis:
	Description	Condensed Consolidated Balance Sheet Caption	30-Jun-14
			Total			Level 1			Level 2			Level 3
			(in millions)
	Corporate debt securities	Cash and cash equivalents	$	73		$	—		$	73		$	—
	Banker acceptances	Cash and cash equivalents	3			—			3			—
	Interest rate swaps	Current assets—other	4			—			4			—
	Corporate debt securities	Investments and other assets—other	24			—			24			—
	Interest rate swaps	Investments and other assets—other	19			—			19			—
	Money market funds	Investments and other assets—other	1			1			—			—
	Total Assets		$	124		$	1		$	123		$	—
	Commodity derivatives	Current liabilities—other	$	6		$	—		$	—		$	6
	Interest rate swaps	Current liabilities—other	3			—			3			—
	Natural gas purchase contracts	Deferred credits and other liabilities—regulatory and other	1			—			—			1
	Commodity derivatives	Deferred credits and other liabilities—regulatory and other	2			—			—			2
	Total Liabilities		$	12		$	—		$	3		$	9
	Description	Condensed Consolidated Balance Sheet Caption	31-Dec-13
			Total			Level 1			Level 2			Level 3
			(in millions)
	Corporate debt securities	Cash and cash equivalents	$	49		$	—		$	49		$	—
	Corporate debt securities	Current assets—other	7			—			7			—
	Interest rate swaps	Current assets—other	8			—			8			—
	Corporate debt securities	Investments and other assets—other	11			—			11			—
	Interest rate swaps	Investments and other assets—other	15			—			15			—
	Money market funds	Investments and other assets—other	1			1			—			—
	Total Assets		$	91		$	1		$	90		$	—
	Natural gas purchase contracts	Deferred credits and other liabilities—regulatory and other	$	3		$	—		$	—		$	3
	Interest rate swaps	Deferred credits and other liabilities—regulatory and other	6			—			6			—
	Total Liabilities		$	9		$	—		$	6		$	3
Fair Value of Financial Instruments Recorded and Carried at Book Value	'
	Our AFS securities are classified on the Condensed Consolidated Balance Sheets as follows:
			Estimated Fair Value
			30-Jun-14			31-Dec-13
			(in millions)
	Restricted funds
	Investments and other assets—other		$	1		$	1
	Non-restricted funds
	Current assets—other		—			7
	Investments and other assets—other		24			11
	Total available-for-sale securities		$	25		$	19
	The fair values of financial instruments that are recorded and carried at book value are summarized in the following table. Judgment is required in interpreting market data to develop the estimates of fair value. These estimates are not necessarily indicative of the amounts we could have realized in current markets.
		30-Jun-14						31-Dec-13
		Book			Approximate			Book			Approximate
		Value			Fair Value			Value			Fair Value
		(in millions)
	Note receivable, noncurrent (a)	$	71		$	71		$	71		$	71
	Long-term debt, including current maturities (b)	13,625			15,226			13,668			14,701
	__________
	(a)	Included within Investments in and Loans to Unconsolidated Affiliates.
	(b)	Excludes unamortized items and fair value hedge carrying value adjustments.

Risk_Management_and_Hedging_Ac1

Risk Management and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2014
Risk Management And Hedging Activities [Abstract]	'
Derivative Assets And Liabilities Offsetting	'
Commodity Derivative Assets and Liabilities Offsetting	'
	Information about our commodity derivatives that had netting or rights of offset arrangements are as follows:
		June 30, 2014
		Gross			Gross			Net Amount Presented in the Condensed Consolidated Balance Sheets
		Amounts			Amounts
					Offset
	Description	(in millions)
	Assets	$	140		$	140		$	—
	Liabilities	148			140			8
Commodity derivative impact	'
	Information regarding the impacts of commodity derivatives on our Condensed Consolidated Statements of Operations are as follows:
				Periods Ended June 30, 2014
	Derivatives		Condensed Consolidated Statement of Operations Caption	Three Months			Six Months
				(in millions)
	Commodity derivatives		Sales of natural gas liquids	$	(4	)	$	(7	)

Issuances_of_SEP_UnitsTables

Issuances of SEP Units(Tables)	6 Months Ended
	Jun. 30, 2014
Noncontrolling Interest [Abstract]	'
Effects of Changes in Ownership Interests in Non-Wholly Owned Consolidated Subsidiaries	'
	The following table presents the effects of the issuances of SEP units:
		Three Months				Six Months
		Ended June 30,				Ended June 30,
		2014		2013		2014		2013
		(in millions)
	Net income-controlling interests	$	146	$	199	$	565	$	539
	Increase in additional paid-in capital resulting from issuances of SEP units	19		38		29		38
	Total net income-controlling interests and changes in equity-controlling interests	$	165	$	237	$	594	$	577

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Pension Plans, Defined Benefit	'
Components of Net Periodic Benefit Cost	'
	Qualified and Non-Qualified Pension Plans—Components of Net Periodic Pension Cost
		Three Months						Six Months
		Ended June 30,						Ended June 30,
		2014			2013			2014			2013
		(in millions)
	U.S.
	Service cost benefit earned	$	4		$	4		$	9		$	9
	Interest cost on projected benefit obligation	6			6			12			11
	Expected return on plan assets	(9		)	(8		)	(19		)	(16		)
	Amortization of loss	3			5			6			10
	Net periodic pension cost	$	4		$	7		$	8		$	14
	Canada
	Service cost benefit earned	$	8		$	8		$	15		$	16
	Interest cost on projected benefit obligation	13			12			26			25
	Expected return on plan assets	(18		)	(16		)	(35		)	(33		)
	Amortization of loss	5			9			11			18
	Amortization of prior service cost	1			1			1			1
	Net periodic pension cost	$	9		$	14		$	18		$	27
U.S. and Canada Other Post-Retirement Benefits	'
Components of Net Periodic Benefit Cost	'
	Other Post-Retirement Benefit Plans—Components of Net Periodic Benefit Cost
		Three Months						Six Months
		Ended June 30,						Ended June 30,
		2014			2013			2014			2013
		(in millions)
	U.S.
	Interest cost on accumulated post-retirement benefit obligation	$	2		$	2		$	4		$	4
	Expected return on plan assets	(1		)	(1		)	(2		)	(2		)
	Amortization of loss	—			1			—			1
	Net periodic other post-retirement benefit cost	$	1		$	2		$	2		$	3
	Canada
	Service cost benefit earned	$	1		$	1		$	2		$	2
	Interest cost on accumulated post-retirement benefit obligation	2			1			3			3
	Net periodic other post-retirement benefit cost	$	3		$	2		$	5		$	5

Consolidating_Financial_Inform1

Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Consolidating Statement of Operations	'
	Spectra Energy Corp
	Condensed Consolidating Statements of Operations
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Three Months Ended June 30, 2014
	Total operating revenues	$	—		$	—		$	1,253		$	—		$	1,253
	Total operating expenses	—			1			914			—			915
	Operating income (loss)	—			(1		)	339			—			338
	Equity in earnings of unconsolidated affiliates	—			—			85			—			85
	Equity in earnings of consolidated subsidiaries	125			264			—			(389		)	—
	Other income and expenses, net	(1		)	—			7			—			6
	Interest expense	—			66			110			—			176
	Earnings before income taxes	124			197			321			(389		)	253
	Income tax expense (benefit)	(22		)	72			15			—			65
	Net income	146			125			306			(389		)	188
	Net income—noncontrolling interests	—			—			42			—			42
	Net income—controlling interests	$	146		$	125		$	264		$	(389	)	$	146
	Three Months Ended June 30, 2013
	Total operating revenues	$	—		$	—		$	1,220		$	—		$	1,220
	Total operating expenses	1			—			865			—			866
	Operating income (loss)	(1		)	—			355			—			354
	Equity in earnings of unconsolidated affiliates	—			—			72			—			72
	Equity in earnings of consolidated subsidiaries	194			317			—			(511		)	—
	Other income and expenses, net	(1		)	1			22			—			22
	Interest expense	—			51			109			—			160
	Earnings before income taxes	192			267			340			(511		)	288
	Income tax expense (benefit)	(7		)	73			(4		)	—			62
	Net income	199			194			344			(511		)	226
	Net income—noncontrolling interests	—			—			27			—			27
	Net income—controlling interests	$	199		$	194		$	317		$	(511	)	$	199
	Spectra Energy Corp
	Condensed Consolidating Statements of Operations
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Six Months Ended June 30, 2014
	Total operating revenues	$	—		$	—		$	3,097		$	(1	)	$	3,096
	Total operating expenses	4			1			2,115			(1		)	2,119
	Operating income (loss)	(4		)	(1		)	982			—			977
	Equity in earnings of unconsolidated affiliates	—			—			246			—			246
	Equity in earnings of consolidated subsidiaries	540			899			—			(1,439		)	—
	Other income and expenses, net	(2		)	1			16			—			15
	Interest expense	—			131			223			—			354
	Earnings before income taxes	534			768			1,021			(1,439		)	884
	Income tax expense (benefit)	(31		)	228			32			—			229
	Net income	565			540			989			(1,439		)	655
	Net income—noncontrolling interests	—			—			90			—			90
	Net income—controlling interests	$	565		$	540		$	899		$	(1,439	)	$	565
	Six Months Ended June 30, 2013
	Total operating revenues	$	—		$	—		$	2,810		$	(1	)	$	2,809
	Total operating expenses	3			—			1,947			(1		)	1,949
	Operating income (loss)	(3		)	—			863			—			860
	Equity in earnings of unconsolidated affiliates	—			—			182			—			182
	Equity in earnings of consolidated subsidiaries	531			826			—			(1,357		)	—
	Other income and expenses, net	(3		)	4			54			—			55
	Interest expense	—			99			210			—			309
	Earnings before income taxes	525			731			889			(1,357		)	788
	Income tax expense (benefit)	(14		)	200			6			—			192
Net income	539			531			883			(1,357		)	596
Net income—noncontrolling interests	—			—			57			—			57
Net income—controlling interests	$	539		$	531		$	826		$	(1,357	)	$	539
Condensed Consolidating Statements of Comprehensive Income	'
	Spectra Energy Corp
	Condensed Consolidating Statements of Comprehensive Income
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Three Months Ended June 30, 2014
	Net income	$	146		$	125		$	306		$	(389	)	$	188
	Other comprehensive income	2			—			229			—			231
	Total comprehensive income, net of tax	148			125			535			(389		)	419
	Less: comprehensive income—noncontrolling interests	—			—			45			—			45
	Comprehensive income—controlling interests	$	148		$	125		$	490		$	(389	)	$	374
	Three Months Ended June 30, 2013
	Net income	$	199		$	194		$	344		$	(511	)	$	226
	Other comprehensive income (loss)	3			1			(244		)	—			(240		)
	Total comprehensive income (loss), net of tax	202			195			100			(511		)	(14		)
	Less: comprehensive income—noncontrolling interests	—			—			25			—			25
	Comprehensive income (loss)—controlling interests	$	202		$	195		$	75		$	(511	)	$	(39	)
	Six Months Ended June 30, 2014
	Net income	$	565		$	540		$	989		$	(1,439	)	$	655
	Other comprehensive income (loss)	4			—			(10		)	—			(6		)
	Total comprehensive income, net of tax	569			540			979			(1,439		)	649
	Less: comprehensive income—noncontrolling interests	—			—			89			—			89
	Comprehensive income—controlling interests	$	569		$	540		$	890		$	(1,439	)	$	560
	Six Months Ended June 30, 2013
	Net income	$	539		$	531		$	883		$	(1,357	)	$	596
	Other comprehensive income (loss)	7			1			(420		)	—			(412		)
	Total comprehensive income, net of tax	546			532			463			(1,357		)	184
	Less: comprehensive income—noncontrolling interests	—			—			52			—			52
	Comprehensive income—controlling interests	$	546		$	532		$	411		$	(1,357	)	$	132
Condensed Consolidating Balance Sheet	'
	Spectra Energy Corp
	Condensed Consolidating Balance Sheet
	June 30, 2014
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Cash and cash equivalents	$	—		$	2		$	298		$	—		$	300
	Receivables—consolidated subsidiaries	20			—			9			(29		)	—
	Receivables—other	1			—			1,221			—			1,222
	Other current assets	15			11			657			—			683
	Total current assets	36			13			2,185			(29		)	2,205
	Investments in and loans to unconsolidated	—			—			2,803			—			2,803
	affiliates
	Investments in consolidated subsidiaries	14,574			20,993			—			(35,567		)	—
	Advances receivable—consolidated subsidiaries	—			4,417			755			(5,172		)	—
	Notes receivable—consolidated subsidiaries	—			—			3,215			(3,215		)	—
	Goodwill	—			—			4,841			—			4,841
	Other assets	42			30			326			—			398
	Property, plant and equipment, net	—			—			22,260			—			22,260
	Regulatory assets and deferred debits	3			15			1,421			—			1,439
	Total Assets	$	14,655		$	25,468		$	37,806		$	(43,983	)	$	33,946
	Accounts payable—other	$	3		$	1		$	514		$	—		$	518
	Accounts payable—consolidated subsidiaries	—			11			18			(29		)	—
	Commercial paper	—			220			549			—			769
	Short-term borrowings—consolidated	—			415			—			(415		)	—
	subsidiaries
	Taxes accrued	2			—			101			—			103
	Current maturities of long-term debt	—			408			88			—			496
	Other current liabilities	64			75			1,131			—			1,270
	Total current liabilities	69			1,130			2,401			(444		)	3,156
	Long-term debt	—			2,899			10,242			—			13,141
	Advances payable—consolidated subsidiaries	5,172			—			—			(5,172		)	—
	Notes payable—consolidated subsidiaries	—			2,800			—			(2,800		)	—
	Deferred credits and other liabilities	762			4,065			1,819			—			6,646
	Preferred stock of subsidiaries	—			—			258			—			258
	Equity
	Controlling interests	8,652			14,574			20,993			(35,567		)	8,652
	Noncontrolling interests	—			—			2,093			—			2,093
	Total equity	8,652			14,574			23,086			(35,567		)	10,745
	Total Liabilities and Equity	$	14,655		$	25,468		$	37,806		$	(43,983	)	$	33,946
	Spectra Energy Corp
	Condensed Consolidating Balance Sheet
	December 31, 2013
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	Cash and cash equivalents	$	—		$	12		$	189		$	—		$	201
	Receivables—consolidated subsidiaries	176			394			—			(570		)	—
	Receivables—other	1			—			1,335			—			1,336
	Other current assets	40			15			489			—			544
	Total current assets	217			421			2,013			(570		)	2,081
	Investments in and loans to unconsolidated	—			—			3,043			—			3,043
	affiliates
	Investments in consolidated subsidiaries	13,244			19,403			—			(32,647		)	—
	Advances receivable—consolidated subsidiaries	—			4,038			677			(4,715		)	—
	Notes receivable—consolidated subsidiaries	—			—			3,215			(3,215		)	—
	Goodwill	—			—			4,810			—			4,810
	Other assets	39			30			316			—			385
	Property, plant and equipment, net	—			—			21,829			—			21,829
Regulatory assets and deferred debits	3			17			1,365			—			1,385
Total Assets	$	13,503		$	23,909		$	37,268		$	(41,147	)	$	33,533
Accounts payable—other	$	4		$	—		$	436		$	—		$	440
Accounts payable—consolidated subsidiaries	89			—			481			(570		)	—
Commercial paper	—			344			688			—			1,032
Short-term borrowings—consolidated	—			415			—			(415		)	—
subsidiaries
Taxes accrued	4			—			68			—			72
Current maturities of long-term debt	—			557			640			—			1,197
Other current liabilities	81			75			1,142			—			1,298
Total current liabilities	178			1,391			3,455			(985		)	4,039
Long-term debt	—			2,605			9,883			—			12,488
Advances payable—consolidated subsidiaries	4,715			—			—			(4,715		)	—
Notes payable—consolidated subsidiaries	—			2,800			—			(2,800		)	—
Deferred credits and other liabilities	116			3,869			2,440			—			6,425
Preferred stock of subsidiaries	—			—			258			—			258
Equity
Controlling interests	8,494			13,244			19,403			(32,647		)	8,494
Noncontrolling interests	—			—			1,829			—			1,829
Total equity	8,494			13,244			21,232			(32,647		)	10,323
Total Liabilities and Equity	$	13,503		$	23,909		$	37,268		$	(41,147	)	$	33,533
Condensed Consolidating Statement of Cash Flows	'
	Spectra Energy Corp
	Condensed Consolidating Statement of Cash Flows
	Six Months Ended June 30, 2014
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	CASH FLOWS FROM OPERATING ACTIVITIES
	Net income	$	565		$	540		$	989		$	(1,439	)	$	655
	Adjustments to reconcile net income to net cash provided by (used in) operating activities:
	Depreciation and amortization	—			—			405			—			405
	Equity in earnings of unconsolidated affiliates	—			—			(246		)	—			(246		)
	Equity in earnings of consolidated subsidiaries	(540		)	(899		)	—			1,439			—
	Distributions received from unconsolidated affiliates	—			—			199			—			199
	Other	(36		)	229			3			—			196
	Net cash provided by (used in) operating activities	(11		)	(130		)	1,350			—			1,209
	CASH FLOWS FROM INVESTING ACTIVITIES
	Capital expenditures	—			—			(833		)	—			(833		)
	Investments in and loans to unconsolidated	—			—			(30		)	—			(30		)
	affiliates
	Purchases of held-to-maturity securities	—			—			(437		)	—			(437		)
	Proceeds from sales and maturities of held-to-maturity securities	—			—			453			—			453
	Purchases of available-for-sale securities	—			—			(13		)	—			(13		)
	Proceeds from sales and maturities of available-for-sale securities	—			—			7			—			7
	Distributions received from unconsolidated	—			—			242			—			242
	affiliates
	Advances from affiliates	85			91			—			(176		)	—
	Other changes in restricted funds	—			—			(1		)	—			(1		)
	Net cash provided by (used in) investing activities	85			91			(612		)	(176		)	(612		)
	CASH FLOWS FROM FINANCING ACTIVITIES
	Proceeds from the issuance of long-term debt	—			300			412			—			712
	Payments for the redemption of long-term debt	—			(148		)	(588		)	—			(736		)
	Net decrease in commercial paper	—			(124		)	(132		)	—			(256		)
	Distributions to noncontrolling interests	—			—			(81		)	—			(81		)
	Contributions from noncontrolling interests	—			—			112			—			112
	Dividends paid on common stock	(453		)	—			—			—			(453		)
	Proceeds from the issuance of SEP common units	—			—			191			—			191
	Distributions and advances from (to) affiliates	366			1			(543		)	176			—
	Other	13			—			(1		)	—			12
	Net cash provided by (used in) financing activities	(74		)	29			(630		)	176			(499		)
	Effect of exchange rate changes on cash	—			—			1			—			1
	Net increase (decrease) in cash and cash equivalents	—			(10		)	109			—			99
	Cash and cash equivalents at beginning of period	—			12			189			—			201
	Cash and cash equivalents at end of period	$	—		$	2		$	298		$	—		$	300
	Spectra Energy Corp
	Condensed Consolidating Statement of Cash Flows
	Six Months Ended June 30, 2013
	(Unaudited)
	(In millions)
		Spectra			Spectra			Non-Guarantor			Eliminations			Consolidated
		Energy			Capital			Subsidiaries
		Corp
	CASH FLOWS FROM OPERATING ACTIVITIES
	Net income	$	539		$	531		$	883		$	(1,357	)	$	596
	Adjustments to reconcile net income to net cash provided by operating activities:
	Depreciation and amortization	—			—			388			—			388
	Equity in earnings of unconsolidated affiliates	—			—			(182		)	—			(182		)
	Equity in earnings of consolidated subsidiaries	(531		)	(826		)	—			1,357			—
	Distributions received from unconsolidated affiliates	—			—			147			—			147
	Other	(7		)	335			(77		)	—			251
	Net cash provided by operating activities	1			40			1,159			—			1,200
	CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	—			—			(959		)	—			(959		)
Investments in and loans to unconsolidated affiliates	—			—			(168		)	—			(168		)
Acquisitions, net of cash acquired	—			—			(1,254		)	—			(1,254		)
Purchases of held-to-maturity securities	—			—			(456		)	—			(456		)
Proceeds from sales and maturities of held-to-maturity securities	—			—			463			—			463
Purchases of available-for-securities	—			—			(2,899		)	—			(2,899		)
Proceeds from sales and maturities of available-for-sale securities	—			—			2,722			—			2,722
Distributions received from unconsolidated affiliates	—			—			13			—			13
Advances from (to) affiliates	156			(589		)	—			433			—
Other changes in restricted funds	—			—			1			—			1
Other	—			—			2			—			2
Net cash provided by (used in) investing activities	156			(589		)	(2,535		)	433			(2,535		)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	—			1,848			—			—			1,848
Payments for the redemption of long-term debt	—			(495		)	(51		)	—			(546		)
Net increase (decrease) in commercial paper	—			615			(175		)	—			440
Net decrease in short-term borrowings—consolidated subsidiaries	—			(9		)	—			9			—
Distributions to noncontrolling interests	—			—			(69		)	—			(69		)
Dividends paid on common stock	(412		)	—			—			—			(412		)
Proceeds from the issuance of SEP common units	—			—			190			—			190
Distributions and advances from (to) affiliates	240			(1,405		)	1,607			(442		)	—
Other	15			(6		)	1			—			10
Net cash provided by (used in) financing activities	(157		)	548			1,503			(433		)	1,461
Effect of exchange rate changes on cash	—			—			(3		)	—			(3		)
Net increase (decrease) in cash and cash equivalents	—			(1		)	124			—			123
Cash and cash equivalents at beginning of period	—			3			91			—			94
Cash and cash equivalents at end of period	$	—		$	2		$	215		$	—		$	217

General_Additional_Information

General - Additional Information (Detail) (DCP Midstream, LLC)	Jun. 30, 2014
DCP Midstream, LLC	'
General [Line Items]	'
Percentage of ownership	50.00%

Acquisition_of_ExpressPlatte_S

Acquisition of Express-Platte Summary of Fair Values of Assets and Liabilities Acquired (Detail) (Express-Platte, USD $)	1 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 14, 2013
Express-Platte	'	'
Acquisition of Express-Platte	'	'
Cash purchase price	$1,250	'
Working capital and other purchase adjustments	71	'
Total payments, net of adjustments	1,321	'
Long-term debt, including current portion	-260	-260
Total assets acquired/liabilities assumed	798	'
Cash	67	'
Receivables	25	'
Other current assets	9	'
Property, plant and equipment	1,251	'
Accounts payable	-18	'
Other current liabilities	-17	'
Deferred credits and other liabilities	($259)	'

Acquisition_of_ExpressPlatte_A

Acquisition of Express-Platte - Additional Information (Detail) (USD $)	6 Months Ended			0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Mar. 14, 2013	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
				Express-Platte	Express-Platte	Adjustment to Estimated Fair Value	Subsidiary Issuer	Subsidiary Issuer
						Express-Platte	UNITED STATES	CANADA
							Express-Platte	Express-Platte
Acquisition of Express-Platte	'	'	'	'	'	'	'	'
Business Acquisition, Percentage of Voting Interests Acquired	'	'	'	100.00%	'	'	'	'
Property, plant and equipment	'	'	'	'	$1,251,000,000	$60,000,000	'	'
Other current assets	'	'	'	'	9,000,000	1,000,000	'	'
Deferred credits and other liabilities	'	'	'	'	259,000,000	24,000,000	'	'
Goodwill	4,841,000,000	'	4,810,000,000	'	523,000,000	37,000,000	'	'
Business Combination, Consideration Transferred	'	'	'	1,500,000,000	'	'	'	'
Payments to Acquire Businesses, Net of Cash Acquired	0	1,254,000,000	'	1,250,000,000	'	'	'	'
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Non-current Liabilities Long Term Debt Including Current Portion	'	'	'	$260,000,000	$260,000,000	'	'	'
Percentage of Voting Rights Contributed	'	'	'	'	'	'	100.00%	'
Percentage of Voting Rights Sold	'	'	'	'	'	'	'	100.00%

Business_Segments_Additional_I

Business Segments - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
	reportable_segments
DCP Midstream, LLC | DCP Midstream Partners, LP	'
Segment Reporting Information [Line Items]	'
Percentage of ownership interests	22.00%
Total reportable segments	'
Segment Reporting Information [Line Items]	'
Number of reportable segments	4
Spectra Energy Corp | DCP Midstream, LLC	'
Segment Reporting Information [Line Items]	'
Percentage of ownership interests	50.00%
Phillips 66 | DCP Midstream, LLC	'
Segment Reporting Information [Line Items]	'
Percentage of ownership interests	50.00%

Business_Segment_Data_Condense

Business Segment Data - Condensed Consolidated Statements of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	$1,253	$1,220	$3,096	$2,809
Depreciation and amortization	199	196	399	382
Interest expense	176	160	354	309
Interest income and other	1	-3	5	1
Earnings From Continuing Operations Before Income Taxes	253	288	884	788
Operating Segments - Unaffiliated Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	1,253	1,220	3,096	2,809
Intersegment Eliminations	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	-48	-33	-97	-63
Intersegment Eliminations | Operating Segments - Affiliates Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	-48	-33	-97	-63
Corporate and Other | Operating Segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	19	18	37	36
EBITDA	-24	-29	-41	-43
Depreciation and amortization	11	10	22	20
Corporate and Other | Operating Segments - Affiliates Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	17	15	32	30
Corporate and Other | Operating Segments - Unaffiliated Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	2	3	5	6
Total reportable segments | Operating Segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	1,282	1,235	3,156	2,836
EBITDA	651	676	1,673	1,521
Depreciation and amortization	188	186	377	362
Total reportable segments | Operating Segments - Affiliates Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	31	18	65	33
Total reportable segments | Operating Segments - Unaffiliated Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	1,251	1,217	3,091	2,803
Field Services | Operating Segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
EBITDA	54	46	184	134
Western Canada Transmission And Processing | Operating Segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	391	391	966	834
EBITDA	111	157	348	347
Depreciation and amortization	68	70	135	134
Western Canada Transmission And Processing | Operating Segments - Affiliates Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	31	18	65	33
Western Canada Transmission And Processing | Operating Segments - Unaffiliated Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	360	373	901	801
Distribution | Operating Segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	360	352	1,078	1,051
EBITDA	112	115	338	335
Depreciation and amortization	48	51	97	102
Distribution | Operating Segments - Unaffiliated Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	360	352	1,078	1,051
Spectra Energy Partners | Operating Segments	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	531	492	1,112	951
EBITDA	374	358	803	705
Depreciation and amortization	72	65	145	126
Spectra Energy Partners | Operating Segments - Unaffiliated Revenues	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Operating revenues	$531	$492	$1,112	$951

Regulatory_Matters_Additional_

Regulatory Matters - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2014
					Union Gas Limited	Favorable Regulatory Action	Favorable Regulatory Action	Positive Outcome of Litigation
					Other Current Liabilities	Union Gas Limited	Union Gas Limited	Union Gas Limited
Regulatory Matters [Line Items]	'	'	'	'	'	'	'	'
Earnings Before Income Taxes	$253	$288	$884	$788	'	$7	$10	'
Regulatory assets	'	'	'	'	21	'	'	'
Transportation, storage and processing of natural gas	780	766	1,667	1,566	'	'	32	'
Sales of natural gas liquids	40	65	227	177	'	'	'	15
Other	54	39	126	78	'	'	'	7
Operating revenues	1,253	1,220	3,096	2,809	'	'	'	'
Operating Expenses	$405	$410	$768	$742	'	'	'	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Contingency [Line Items]	'	'	'	'
Income tax expense (benefit) from continuing operations	$65	$62	$229	$192
Effective tax rate for income from continuing operations	26.00%	22.00%	26.00%	24.00%
Minimum	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Potential decrease of unrecogonized tax benefits	15	'	15	'
Maximum	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Potential decrease of unrecogonized tax benefits	$20	'	$20	'

Earnings_per_Common_Share_Basi

Earnings per Common Share - Basic and Diluted Eps Calculations (Detail) (USD $)	3 Months Ended				6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share [Abstract]	'		'		'		'
Net income-controlling interests	$146		$199		$565		$539
Earnings Per Share, Basic	$0.22	[1]	$0.30	[1]	$0.84	[1]	$0.81	[1]
Earnings Per Share, Diluted	$0.22	[1]	$0.30	[1]	$0.84	[1]	$0.80	[1]
Weighted-average common shares outstanding	'		'		'		'
Basic (in shares)	671		669		671		669
Diluted (in shares)	673		671		672		671
[1]	(a) Quarterly earnings-per-share amounts are stand-alone calculations and may not be additive to full-year amounts due to rounding.

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]	'	'	'	'
Beginning balance	$1,008	$1,340	$1,241	$1,509
Reclassified to net income	1	2	3	4
Other AOCI activity	227	-240	-8	-411
Ending balance	1,236	1,102	1,236	1,102
Foreign Currency Translation Adjustment	'	'	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]	'	'	'	'
Beginning balance	1,313	1,858	1,557	2,044
Reclassified to net income	0	0	0	0
Other AOCI activity	220	-249	-24	-435
Ending balance	1,533	1,609	1,533	1,609
Pension and Post-retirement Benefit Plan Obligations	'	'	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]	'	'	'	'
Beginning balance	-297	-496	-304	-507
Reclassified to net income	0	0	0	0
Other AOCI activity	6	10	13	21
Ending balance	-291	-486	-291	-486
Gas Purchase Contract Hedges	'	'	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]	'	'	'	'
Beginning balance	-7	-18	-11	-23
Reclassified to net income	0	1	2	3
Other AOCI activity	1	0	3	3
Ending balance	-6	-17	-6	-17
Other	'	'	'	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Roll Forward]	'	'	'	'
Beginning balance	-1	-4	-1	-5
Reclassified to net income	1	1	1	1
Other AOCI activity	0	-1	0	0
Ending balance	$0	($4)	$0	($4)

Inventory_Components_of_Invent

Inventory - Components of Inventory (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Natural gas	$166	$155
NGLs	33	30
Materials and supplies	78	78
Total inventory	$277	$263

Investments_in_and_Loans_to_Un2

Investments in and Loans to Unconsolidated Affiliates - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Equity in earnings of unconsolidated affiliates	$85	$72	$246	$182
DCP Midstream, LLC	'	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Percentage of ownership interests	50.00%	'	50.00%	'
Equity in earnings of unconsolidated affiliates	$9	$7	$57	$50

Investments_in_and_Loans_to_Un3

Investments in and Loans to Unconsolidated Affiliates - Summary Financial Information for DCP Midstream Presented at 100 Percent (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Related Party Transaction [Line Items]	'	'	'	'
Operating revenues	$1,253	$1,220	$3,096	$2,809
Operating expenses	915	866	2,119	1,949
Operating income	338	354	977	860
Net Income	188	226	655	596
Net income attributable to membersb interests	146	199	565	539
Unconsolidated Affiliates | DCP Midstream, LLC	'	'	'	'
Related Party Transaction [Line Items]	'	'	'	'
Operating revenues	3,541	2,861	7,456	5,473
Operating expenses	3,387	2,671	7,032	5,121
Operating income	154	190	424	352
Net Income	92	142	295	262
Net income attributable to membersb interests	$89	$78	$254	$169

Goodwill_Changes_in_Goodwill_D

Goodwill - Changes in Goodwill (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2013
Goodwill Roll Forward[Line Items]	'	'
Beginning Balance	$4,810	'
Foreign currency translation	-6	'
Ending Balance	4,841	'
Express-Platte	'	'
Goodwill Roll Forward[Line Items]	'	'
Beginning Balance	'	523
Acquisition of Express-Platte	37	'
Ending Balance	'	$523

Marketable_Securities_and_Rest2

Marketable Securities and Restricted Funds - Estimated Fair Values of Available for Sale Securities (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Total available-for-sale securities	$25	$19
Corporate debt securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Total available-for-sale securities	24	18
Money market funds	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Total available-for-sale securities	$1	$1

Marketable_Securities_and_Rest3

Marketable Securities and Restricted Funds - Schedule of Restricted and Non-restricted Available for Sale Securities (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Total available-for-sale securities	$25	$19
Investments and other assets-other	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Restricted funds, Investments and other assets - other	1	1
Non-restricted funds, Investments and other assets - other	24	11
Other Current Assets	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Non-restricted funds, Current assets - other	$0	$7

Marketable_Securities_and_Rest4

Marketable Securities and Restricted Funds - Estimated Fair Values of Held to Maturity Securities (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'	'
Total held-to-maturity securities	$197	$213
Other Current Assets | Bankers acceptances	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Total held-to-maturity securities	35	35
Other Current Assets | Canadian government securities	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Total held-to-maturity securities	33	34
Other Current Assets | Money market funds	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Total held-to-maturity securities	4	3
Investments and other assets-other | Bankers acceptances	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Total held-to-maturity securities	0	10
Investments and other assets-other | Canadian government securities	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Total held-to-maturity securities	$125	$131

Marketable_Securities_and_Rest5

Marketable Securities and Restricted Funds - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014
	Available-for-sale Securities	Held-to-maturity Securities	Other Current Assets	Other Current Assets	M&N Canada six point nine zero percent senior secured notes due 2014 to 2019
	Maximum	Maximum			Maritimes & Northeast Pipeline Limited Partnership
Gain (Loss) on Investments [Line Items]	'	'	'	'	'
Debt Instrument, Interest Rate, Stated Percentage	'	'	'	'	6.90%
Weighted-average contractual maturity of outstanding securities	'2 years	'1 year	'	'	'
Restricted Cash and Cash Equivalents, Current	'	'	$20	$19	'

Debt_and_Credit_Facilities_Ava

Debt and Credit Facilities - Available Credit Facilities and Restrictive Debt Covenants (Detail)

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Dec. 31, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

In Millions, unless otherwise specified

USD ($)

USD ($)

Spectra Energy Capital, LLC

Spectra Energy Capital, LLC

Spectra Energy Capital, LLC

Westcoast Energy Inc.

Union Gas Limited

Spectra Energy Partners, LP

Covenant Requirement

Covenant Requirement

Covenant Requirement

Covenant Requirement

USD ($)

USD ($)

Multi Year Syndicated

Multi Year Syndicated

Multi Year Syndicated

Multi Year Syndicated

Spectra Energy Capital, LLC

Westcoast Energy Inc.

Union Gas Limited

Maximum

USD ($)

USD ($)

USD ($)

USD ($)

CAD

CAD

Spectra Energy Capital, LLC

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Debt-to-total defined capitalization ratio

'

'

'

'

'

'

'

'

56.00%

'

'

65.00%

Line of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Line Of Credit Year of Maturity

'

'

'

'

'2018

[1]

'2016

[2]

'2016

[3]

'2018

[4]

'

'

'

'

Outstanding Commercial Paper

$769

$1,032

$220

$344

$220

[1]

$0

[2]

$0

[3]

$549

[4]

'

'

'

'

Available Credit Facilities Capacity

2,887

'

'

'

780

[1]

281

[2]

375

[3]

1,451

[4]

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

$3,656

'

'

'

$1,000

[1]

$281

[2]

$375

[3]

$2,000

[4]

'

300

400

'

[1]

Revolving credit facility contains a covenant requiring the Spectra Energy Corp consolidated debt-to-total capitalization ratio, as defined in the agreement, to not exceed 65%. Per the terms of the agreement, collateralized debt is excluded from the calculation of the ratio. This ratio was 56% at JuneB 30, 2014.

[2]

U.S. dollar equivalent at JuneB 30, 2014. The revolving credit facility is 300 million Canadian dollars and contains a covenant that requires the Westcoast Energy Inc. non-consolidated debt-to-total capitalization ratio to not exceed 75%. The ratio was 41% at JuneB 30, 2014.

[3]

U.S. dollar equivalent at JuneB 30, 2014. The revolving credit facility is 400 million Canadian dollars and contains a covenant that requires the Union Gas debt-to-total capitalization ratio to not exceed 75% and a provision which requires Union Gas to repay all borrowings under the facility for a period of two days during the second quarter of each year. The ratio was 65% at JuneB 30, 2014.

[4]

Revolving credit facility contains a covenant that requires SEP to maintain a ratio of total Consolidated Indebtedness-to-Consolidated EBITDA, as defined in the credit agreement, of 5.0 to 1 or less, provided that for three fiscal quarters subsequent to certain acquisitions (such as the NovemberB 1, 2013 U.S. Assets Dropdown from Spectra Energy Corp), the ratio may be 5.5 to 1 or less. As of JuneB 30, 2014, this ratio was 3.9 to 1 after giving effect to the U.S. Assets Dropdown.

Debt_and_Credit_Facilities_Add

Debt and Credit Facilities - Additional Information (Detail)

Jun. 30, 2014

Jun. 30, 2014

Jun. 02, 2014

Jun. 30, 2014

Jun. 02, 2014

Jun. 02, 2014

Jun. 30, 2014

Jun. 02, 2014

Jun. 02, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Jan. 14, 2014

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Nov. 01, 2013

USD ($)

Union Gas Limited

Union Gas Limited

Union Gas Limited

Union Gas Limited

Union Gas Limited

Union Gas Limited

Union Gas Limited

Union Gas Limited

Union Gas Limited

Spectra Energy Partners, LP

Spectra Energy Partners, LP

Spectra Energy Partners, LP

Spectra Energy Capital, LLC

Spectra Energy Capital, LLC

Spectra Energy Capital, LLC

Spectra Energy Capital, LLC

Westcoast Energy Inc.

Westcoast Energy Inc.

U.S. Asset Dropdown

Covenant Requirement

Unsecured Debt [Member]

Union two point seven six percent unsecured notes due in 2021 [Member]

Union two point seven six percent unsecured notes due in 2021 [Member]

Union two point seven six percent unsecured notes due in 2021 [Member]

Union four point two zero percent unsecured notes due in 2044 [Member]

Union four point two zero percent unsecured notes due in 2044 [Member]

Union four point two zero percent unsecured notes due in 2044 [Member]

Maximum

Covenant Requirement

Maximum

Temporary maximum

Covenant Requirement

Delayed Draw Term Loan

Delayed Draw Term Loan

Maximum

Covenant Requirement

Maximum

Spectra Energy Subsidiaries

CAD

USD ($)

CAD

USD ($)

CAD

Covenant Requirement

Covenant Requirement

Covenant Requirement

USD ($)

Covenant Requirement

CAD

Covenant Requirement

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt-to-total capitalization ratio

'

65.00%

'

'

'

'

'

'

'

75.00%

'

'

'

'

'

'

'

41.00%

75.00%

'

Debt-to-Adjusted EBITDA ratio maximum

'

'

'

'

'

'

'

'

'

'

'

5

5.5

'

'

'

'

'

'

'

Debt-to-Adjusted EBITDA ratio

'

'

'

'

'

'

'

'

'

'

3.9

'

'

'

'

'

'

'

'

'

Date of acquisition

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1-Nov-13

Line of Credit Facility, Maximum Borrowing Capacity

$3,656,000,000

400,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

'

Debt-to-total defined capitalization ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

56.00%

'

'

65.00%

'

'

'

Debt Instrument, Issuance Date

'

'

2-Jun-14

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unsecured Debt

'

'

'

'

183,000,000

200,000,000

'

229,000,000

250,000,000

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Stated Percentage

'

'

'

'

2.76%

2.76%

'

4.20%

4.20%

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument Year of Maturity

'

'

'

'2021

'

'

'2044

'

'

'

'

'

'

'

'2018

'

'

'

'

'

Debt instrument, face amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$300,000,000

'

'

'

'

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis with Fair Value Hierarchy Levels (Detail) (Fair Value, Measurements, Recurring, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	$124	$91
Fair Value Liabilities	12	9
Corporate debt securities | Investments and other assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	24	11
Corporate debt securities | Current assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	'	7
Corporate debt securities | Cash and cash equivalents	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	73	49
Bankers acceptances | Cash and cash equivalents	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	3	'
Interest rate swaps | Deferred credits and other liabilities - regulatory and other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	'	6
Interest rate swaps | Other Current Liabilities	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	3	'
Interest rate swaps | Investments and other assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	19	15
Interest rate swaps | Current assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	4	8
Money market funds | Investments and other assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	1	1
Commodity Contract | Deferred credits and other liabilities - regulatory and other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	2	'
Commodity Contract | Other Current Liabilities	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	6	'
Natural gas purchase contracts | Deferred credits and other liabilities - regulatory and other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	1	3
Level 1	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	1	1
Level 1 | Money market funds | Investments and other assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	1	1
Level 2	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	123	90
Fair Value Liabilities	3	6
Level 2 | Corporate debt securities | Investments and other assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	24	11
Level 2 | Corporate debt securities | Current assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	'	7
Level 2 | Corporate debt securities | Cash and cash equivalents	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	73	49
Level 2 | Bankers acceptances | Cash and cash equivalents	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	3	'
Level 2 | Interest rate swaps | Deferred credits and other liabilities - regulatory and other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	'	6
Level 2 | Interest rate swaps | Other Current Liabilities	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	3	'
Level 2 | Interest rate swaps | Investments and other assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	19	15
Level 2 | Interest rate swaps | Current assets-other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Assets	4	8
Level 3	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	9	3
Level 3 | Commodity Contract | Deferred credits and other liabilities - regulatory and other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	2	'
Level 3 | Commodity Contract | Other Current Liabilities	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	6	'
Level 3 | Natural gas purchase contracts | Deferred credits and other liabilities - regulatory and other	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair Value Liabilities	$1	$3

Fair_Value_Measurements_Change

Fair Value Measurements - Changes in Level 3 Assets and Liabilities that are Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs (Detail) (Long-term derivative liabilities, USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Long-term derivative liabilities	'	'	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'	'	'	'
Fair value, beginning of period	$5	$6	$3	$9
Total realized/unrealized losses (gains):	'	'	'	'
Included in earnings	5	0	9	1
Included in other comprehensive income	-1	0	-4	-4
Settlements	0	0	1	0
Fair value, end of period	9	6	9	6
Total losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to liabilities held at the end of the period	$4	$0	$7	$1

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value of Financial Instruments Recorded and Carried at Book Value (Detail) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Book Value	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Note receivable, noncurrent	$71	[1]	$71	[1]
Long-term Debt	13,625	[2]	13,668	[2]
Approximate Fair Value	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Note receivable, noncurrent	71	[1]	71	[1]
Long-term Debt, Fair Value	$15,226	[2]	$14,701	[2]
[1]	Included within Investments in and Loans to Unconsolidated Affiliates.
[2]	Excludes unamortized items and fair value hedge carrying value adjustments

Risk_Management_and_Hedging_Ac2

Risk Management and Hedging Activities - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
	gal
Pay Floating Receive Fixed Swaps	'
Derivative [Line Items]	'
Notional principal amount of interest rate hedges	$1,617
Interest Rate Swaps One	'
Derivative [Line Items]	'
Gross Amounts Presented in the Condensed Consolidated Balance Sheets, Liabilities	1
Interest Rate Swaps Two	'
Derivative [Line Items]	'
Gross Amounts Presented in the Condensed Consolidated Balance Sheets, Liabilities	2
Commodity Contract	'
Derivative [Line Items]	'
Gross Amounts Presented in the Condensed Consolidated Balance Sheets, Liabilities	$148
Underlying, Derivative Volume	129,000,000
Derivative, Term of Contract	'2017

Risk_Management_and_Hedging_Ac3

Risk Management and Hedging Activities - Information about Interest Rate Swaps (Detail) (Interest rate swaps, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Interest rate swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts Presented in the Condensed Consolidated Balance Sheets, Assets	$23	$23
Amounts Not Offset in the Condensed Consolidated Balance Sheets, Assets	2	3
Net Amount	21	20
Gross Amounts Presented in the Condensed Consolidated Balance Sheets, Liabilities	3	6
Amounts Not Offset in the Condensed Consolidated Balance Sheets, Liabilities	2	3
Net Amount	$1	$3

Risk_Management_and_Hedging_Ac4

Risk Management and Hedging Activities - Commodity derivative assets and liabilities offsetting (Details) (Commodity Contract, USD $)	Jun. 30, 2014
In Millions, unless otherwise specified
Commodity Contract	'
Derivative Assets And Liabilities Offsetting Table Text Block [Line Items]	'
Net Amounts Presented in the Condensed Consolidated Balance Sheets, Liabilities	$8
Derivative Liability, Fair Value, Gross Liability	148
Derivative Liability, Fair Value, Amount Offset Against Assets	140
Net Amounts Presented in the Condensed Consolidated Balance Sheet, Assets	0
Derivative Asset, Fair Value, Amount Offset Against Liabilities	140
Derivative Asset, Fair Value, Gross Asset	$140

Risk_Management_and_Hedging_Ac5

Risk Management and Hedging Activities - Commodity derivative impact (Details) (Commodity Contract, USD $)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2014
Commodity Contract	'	'
Commodity derivative impact [Line Items]	'	'
Commodity derivatives - Sales of natural gas liquids	($4)	($7)

Guarantees_and_Indemnification1

Guarantees and Indemnifications - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Duke Energy	'
Guarantor Obligations [Line Items]	'
Maximum potential amount of future payments required to make under performance guarantees	$406
Duke Energy | Guarantees Expire in 2028	'
Guarantor Obligations [Line Items]	'
Maximum potential amount of future payments required to make under performance guarantees	$201
Guarantee expiration year	'2028
Fluor Enterprises	'
Guarantor Obligations [Line Items]	'
Percentage of ownership interests	50.00%
Westcoast Energy Inc.	'
Guarantor Obligations [Line Items]	'
Percentage of ownership interest	100.00%

Issuances_of_SEP_Units_Details

Issuances of SEP Units (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Noncontrolling Interest [Line Items]	'	'	'	'
Total Net Income Controlling Interests And Changes In Equity Controlling Interests	$165	$237	$594	$577
Net income-controlling interests	146	199	565	539
Additional Paid-in Capital	'	'	'	'
Noncontrolling Interest [Line Items]	'	'	'	'
GainFromIssuanceOfAdditionalEquityInterestsToNoncontrollingInterestHolders	$19	$38	$29	$38

Issuances_of_SEP_Units_Additio

Issuances of SEP Units - (Additional Information) (Details) (USD $)	3 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]	'	'
Proceeds from the issuance of Spectra Energy Partners, LP	$191	'
Spectra Energy Partners, LP	'	'
Related Party Transaction [Line Items]	'	'
Proceeds from the issuance of Spectra Energy Partners, LP	195	'
Sale of Stock, Percentage of Ownership before Transaction	'	84.00%
Percentage ownership by parent after equity issuance	83.00%	'
Limited Partner | Spectra Energy Partners, LP	'	'
Related Party Transaction [Line Items]	'	'
Partnership units issued	3,900	'
General Partner | Spectra Energy Partners, LP	'	'
Related Party Transaction [Line Items]	'	'
Partnership units issued	80	'
Additional Paid-in Capital	'	'
Related Party Transaction [Line Items]	'	'
Partners Capital Account Sale Of Units Net Of Tax	29	'
Additional Paid-in Capital | Spectra Energy Partners, LP	'	'
Related Party Transaction [Line Items]	'	'
Partners' Capital Account, Sale of Units	47	'
Noncontrolling Interests	'	'
Related Party Transaction [Line Items]	'	'
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	$144	'

Employee_Benefit_Plans_Other_P

Employee Benefit Plans - Other Post Retirement Benefit Plans Components of Net Periodic Benefit Cost (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
U.S. Pension Plans	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost benefit earned	$4	$4	$9	$9
Interest cost	-6	-6	-12	-11
Expected return on plan assets	-9	-8	-19	-16
Amortization of loss	3	5	6	10
Net periodic cost	4	7	8	14
U.S. Other Post-Retirement Benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Interest cost	-2	-2	-4	-4
Expected return on plan assets	-1	-1	-2	-2
Amortization of loss	0	1	0	1
Net periodic cost	1	2	2	3
Canadian Other Post-Retirement Benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost benefit earned	1	1	2	2
Interest cost	-2	-1	-3	-3
Net periodic cost	3	2	5	5
Canada Pension Plans	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost benefit earned	8	8	15	16
Interest cost	-13	-12	-26	-25
Expected return on plan assets	-18	-16	-35	-33
Amortization of loss	5	9	11	18
Amortization of prior service cost	1	1	1	1
Net periodic cost	$9	$14	$18	$27

Employee_Benefit_Plans_Additio

Employee Benefit Plans - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Canada Pension Plans	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost benefit earned	$8	$8	$15	$16
Contribution to retirement plans	'	'	26	46
Anticipated contributions to the defined benefit plans in 2014	'	'	40	'
U.S. Pension Plans	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost benefit earned	4	4	9	9
Contribution to retirement plans	'	'	10	11
Anticipated contributions to the defined benefit plans in 2014	'	'	22	'
U.S. Other Post-Retirement Benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Percentage of employer contribution to eligible pay per pay period	'	'	6.00%	'
Expensed pre-tax employer matching contributions	4	4	7	7
Canadian Other Post-Retirement Benefits	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost benefit earned	1	1	2	2
Percentage of employer contribution to eligible pay per pay period	'	'	5.00%	'
Expensed pre-tax employer matching contributions	$3	$3	$6	$6

Consolidating_Financial_Inform2

Consolidating Financial Information Condensed Consolidating Statements of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Total operating revenues	$1,253	$1,220	$3,096	$2,809
Total operating expenses	915	866	2,119	1,949
Operating income (loss)	338	354	977	860
Equity in earnings of unconsolidated affiliates	85	72	246	182
Equity in earnings of consolidated subsidiaries	0	0	0	0
Other income and expenses, net	6	22	15	55
Interest expense	176	160	354	309
Earnings Before Income Taxes	253	288	884	788
Income tax expense (benefit)	65	62	229	192
Net income	188	226	655	596
Net income-noncontrolling interests	42	27	90	57
Net income-controlling interests	146	199	565	539
Spectra Energy Corp	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Total operating revenues	0	0	0	0
Total operating expenses	0	1	4	3
Operating income (loss)	0	-1	-4	-3
Equity in earnings of unconsolidated affiliates	0	0	0	0
Equity in earnings of consolidated subsidiaries	125	194	540	531
Other income and expenses, net	-1	-1	-2	-3
Interest expense	0	0	0	0
Earnings Before Income Taxes	124	192	534	525
Income tax expense (benefit)	-22	-7	-31	-14
Net income	146	199	565	539
Net income-noncontrolling interests	0	0	0	0
Net income-controlling interests	146	199	565	539
Spectra Energy Capital, LLC	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Total operating revenues	0	0	0	0
Total operating expenses	1	0	1	0
Operating income (loss)	-1	0	-1	0
Equity in earnings of unconsolidated affiliates	0	0	0	0
Equity in earnings of consolidated subsidiaries	264	317	899	826
Other income and expenses, net	0	1	1	4
Interest expense	66	51	131	99
Earnings Before Income Taxes	197	267	768	731
Income tax expense (benefit)	72	73	228	200
Net income	125	194	540	531
Net income-noncontrolling interests	0	0	0	0
Net income-controlling interests	125	194	540	531
Non-Guarantor Subsidiaries	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Total operating revenues	1,253	1,220	3,097	2,810
Total operating expenses	914	865	2,115	1,947
Operating income (loss)	339	355	982	863
Equity in earnings of unconsolidated affiliates	85	72	246	182
Equity in earnings of consolidated subsidiaries	0	0	0	0
Other income and expenses, net	7	22	16	54
Interest expense	110	109	223	210
Earnings Before Income Taxes	321	340	1,021	889
Income tax expense (benefit)	15	-4	32	6
Net income	306	344	989	883
Net income-noncontrolling interests	42	27	90	57
Net income-controlling interests	264	317	899	826
Eliminations	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Total operating revenues	0	0	-1	-1
Total operating expenses	0	0	-1	-1
Operating income (loss)	0	0	0	0
Equity in earnings of unconsolidated affiliates	0	0	0	0
Equity in earnings of consolidated subsidiaries	-389	-511	-1,439	-1,357
Other income and expenses, net	0	0	0	0
Interest expense	0	0	0	0
Earnings Before Income Taxes	-389	-511	-1,439	-1,357
Income tax expense (benefit)	0	0	0	0
Net income	-389	-511	-1,439	-1,357
Net income-noncontrolling interests	0	0	0	0
Net income-controlling interests	($389)	($511)	($1,439)	($1,357)

Consolidating_Financial_Inform3

Consolidating Financial Information - Condensed Consolidating Statements of Comprehensive Income (Detail) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net income	$188	$226	$655	$596
Other comprehensive income (loss)	231	-240	-6	-412
Total Comprehensive Income, net of tax	419	-14	649	184
Less: comprehensive income-noncontrolling interests	45	25	89	52
Comprehensive IncomebControlling Interests	374	-39	560	132
Spectra Energy Corp	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net income	146	199	565	539
Other comprehensive income (loss)	2	3	4	7
Total Comprehensive Income, net of tax	148	202	569	546
Comprehensive IncomebControlling Interests	148	202	569	546
Spectra Energy Capital, LLC	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net income	125	194	540	531
Other comprehensive income (loss)	0	1	0	1
Total Comprehensive Income, net of tax	125	195	540	532
Comprehensive IncomebControlling Interests	125	195	540	532
Non-Guarantor Subsidiaries	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net income	306	344	989	883
Other comprehensive income (loss)	229	-244	-10	-420
Total Comprehensive Income, net of tax	535	100	979	463
Less: comprehensive income-noncontrolling interests	45	25	89	52
Comprehensive IncomebControlling Interests	490	75	890	411
Eliminations	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Net income	-389	-511	-1,439	-1,357
Total Comprehensive Income, net of tax	-389	-511	-1,439	-1,357
Comprehensive IncomebControlling Interests	($389)	($511)	($1,439)	($1,357)

Consolidating_Financial_Inform4

Consolidating Financial Information - Condensed Consolidating Balance Sheet (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	$300	$201	$217	$94
Receivables-other	1,222	1,336	'	'
Other current assets	683	544	'	'
Total current assets	2,205	2,081	'	'
Investments in and loans to unconsolidated affiliates	2,803	3,043	'	'
Goodwill	4,841	4,810	'	'
Other assets	398	385	'	'
Property, plant and equipment, net	22,260	21,829	'	'
Regulatory assets and deferred debits	1,439	1,385	'	'
Total Assets	33,946	33,533	'	'
Accounts payable-other	518	440	'	'
Commercial paper	769	1,032	'	'
Taxes accrued	103	72	'	'
Current maturities of long-term debt	496	1,197	'	'
Other current liabilities	1,270	1,298	'	'
Total current liabilities	3,156	4,039	'	'
Long-term debt	13,141	12,488	'	'
Deferred credits and other liabilities	6,646	6,425	'	'
Preferred stock of subsidiaries	258	258	'	'
Equity	'	'	'	'
Controlling interests	8,652	8,494	'	'
Noncontrolling interests	2,093	1,829	'	'
Total equity	10,745	10,323	9,729	9,843
Total Liabilities and Equity	33,946	33,533	'	'
Spectra Energy Corp	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Receivables-consolidated subsidiaries	20	176	'	'
Receivables-other	1	1	'	'
Other current assets	15	40	'	'
Total current assets	36	217	'	'
Investments in consolidated subsidiaries	14,574	13,244	'	'
Other assets	42	39	'	'
Regulatory assets and deferred debits	3	3	'	'
Total Assets	14,655	13,503	'	'
Accounts payable-other	3	4	'	'
Accounts payable-consolidated subsidiaries	'	89	'	'
Taxes accrued	2	4	'	'
Other current liabilities	64	81	'	'
Total current liabilities	69	178	'	'
Advances payable-consolidated subsidiaries	5,172	4,715	'	'
Deferred credits and other liabilities	762	116	'	'
Equity	'	'	'	'
Controlling interests	8,652	8,494	'	'
Total equity	8,652	8,494	'	'
Total Liabilities and Equity	14,655	13,503	'	'
Spectra Energy Capital, LLC	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	2	12	2	3
Receivables-consolidated subsidiaries	0	394	'	'
Receivables-other	0	0	'	'
Other current assets	11	15	'	'
Total current assets	13	421	'	'
Investments in and loans to unconsolidated affiliates	0	0	'	'
Investments in consolidated subsidiaries	20,993	19,403	'	'
Advances receivable-consolidated subsidiaries	4,417	4,038	'	'
Other assets	30	30	'	'
Regulatory assets and deferred debits	15	17	'	'
Total Assets	25,468	23,909	'	'
Accounts payable-other	1	0	'	'
Accounts payable-consolidated subsidiaries	11	0	'	'
Commercial paper	220	344	'	'
Short-term borrowings-consolidated subsidiaries	415	415	'	'
Current maturities of long-term debt	408	557	'	'
Other current liabilities	75	75	'	'
Total current liabilities	1,130	1,391	'	'
Long-term debt	2,899	2,605	'	'
Notes payable-consolidated subsidiaries	2,800	2,800	'	'
Deferred credits and other liabilities	4,065	3,869	'	'
Equity	'	'	'	'
Controlling interests	14,574	13,244	'	'
Total equity	14,574	13,244	'	'
Total Liabilities and Equity	25,468	23,909	'	'
Non-Guarantor Subsidiaries	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	298	189	215	91
Receivables-consolidated subsidiaries	9	'	'	'
Receivables-other	1,221	1,335	'	'
Other current assets	657	489	'	'
Total current assets	2,185	2,013	'	'
Investments in and loans to unconsolidated affiliates	2,803	3,043	'	'
Advances receivable-consolidated subsidiaries	755	677	'	'
Notes receivable-consolidated subsidiaries	3,215	3,215	'	'
Goodwill	4,841	4,810	'	'
Other assets	326	316	'	'
Property, plant and equipment, net	22,260	21,829	'	'
Regulatory assets and deferred debits	1,421	1,365	'	'
Total Assets	37,806	37,268	'	'
Accounts payable-other	514	436	'	'
Accounts payable-consolidated subsidiaries	18	481	'	'
Commercial paper	549	688	'	'
Taxes accrued	101	68	'	'
Current maturities of long-term debt	88	640	'	'
Other current liabilities	1,131	1,142	'	'
Total current liabilities	2,401	3,455	'	'
Long-term debt	10,242	9,883	'	'
Advances payable-consolidated subsidiaries	0	0	'	'
Deferred credits and other liabilities	1,819	2,440	'	'
Preferred stock of subsidiaries	258	258	'	'
Equity	'	'	'	'
Controlling interests	20,993	19,403	'	'
Noncontrolling interests	2,093	1,829	'	'
Total equity	23,086	21,232	'	'
Total Liabilities and Equity	37,806	37,268	'	'
Eliminations	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Receivables-consolidated subsidiaries	-29	-570	'	'
Total current assets	-29	-570	'	'
Investments in consolidated subsidiaries	-35,567	-32,647	'	'
Advances receivable-consolidated subsidiaries	-5,172	-4,715	'	'
Notes receivable-consolidated subsidiaries	-3,215	-3,215	'	'
Total Assets	-43,983	-41,147	'	'
Accounts payable-consolidated subsidiaries	-29	-570	'	'
Short-term borrowings-consolidated subsidiaries	-415	-415	'	'
Total current liabilities	-444	-985	'	'
Advances payable-consolidated subsidiaries	-5,172	-4,715	'	'
Notes payable-consolidated subsidiaries	-2,800	-2,800	'	'
Equity	'	'	'	'
Controlling interests	-35,567	-32,647	'	'
Total equity	-35,567	-32,647	'	'
Total Liabilities and Equity	($43,983)	($41,147)	'	'

Consolidating_Financial_Inform5

Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net Income	$655	$596
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	405	388
Equity in earnings of unconsolidated affiliates	-246	-182
Equity in earnings of consolidated subsidiaries	0	0
Distributions received from unconsolidated affiliates	199	147
Other	196	251
Net cash provided by (used in) operating activities	1,209	1,200
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Capital expenditures	-833	-959
Investments in and loans to unconsolidated affiliates	-30	-168
Acquisitions, net of cash acquired	0	-1,254
Purchases of held-to-maturity securities	-437	-456
Proceeds from sales and maturities of held-to-maturity securities	453	463
Purchases of available-for-sale securities	-13	-2,899
Proceeds from sales and maturities of available-for-sale securities	7	2,722
Distributions received from unconsolidated affiliates	242	13
Other changes in restricted funds	-1	1
Other	0	2
Net cash provided by (used in) investing activities	-612	-2,535
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from the issuance of long-term debt	712	1,848
Payments for the redemption of long-term debt	-736	-546
Net increase (decrease) in commercial paper	-256	440
Distributions to noncontrolling interests	-81	-69
Contributions from noncontrolling interests	112	0
Dividends paid on common stock	-453	-412
Proceeds from the issuance of SEP common units	191	190
Other	12	10
Net cash provided by (used in) financing activities	-499	1,461
Effect of exchange rate changes on cash	1	-3
Net increase (decrease) in cash and cash equivalents	99	123
Cash and cash equivalents at beginning of period	201	94
Cash and cash equivalents at end of period	300	217
Spectra Energy Corp	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net Income	565	539
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Equity in earnings of unconsolidated affiliates	0	0
Equity in earnings of consolidated subsidiaries	-540	-531
Other	-36	-7
Net cash provided by (used in) operating activities	-11	1
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Advances from (to) affiliates	85	156
Net cash provided by (used in) investing activities	85	156
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Dividends paid on common stock	-453	-412
Distributions and advances from (to) affiliates	366	240
Other	13	15
Net cash provided by (used in) financing activities	-74	-157
Spectra Energy Capital, LLC	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net Income	540	531
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Equity in earnings of unconsolidated affiliates	0	0
Equity in earnings of consolidated subsidiaries	-899	-826
Other	229	335
Net cash provided by (used in) operating activities	-130	40
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Advances from (to) affiliates	91	-589
Net cash provided by (used in) investing activities	91	-589
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from the issuance of long-term debt	300	1,848
Payments for the redemption of long-term debt	-148	-495
Net increase (decrease) in commercial paper	-124	615
Net decrease in short-term borrowingsbconsolidated subsidiaries	'	-9
Distributions and advances from (to) affiliates	1	-1,405
Other	0	-6
Net cash provided by (used in) financing activities	29	548
Net increase (decrease) in cash and cash equivalents	-10	-1
Cash and cash equivalents at beginning of period	12	3
Cash and cash equivalents at end of period	2	2
Non-Guarantor Subsidiaries	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net Income	989	883
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	405	388
Equity in earnings of unconsolidated affiliates	-246	-182
Equity in earnings of consolidated subsidiaries	0	0
Distributions received from unconsolidated affiliates	199	147
Other	3	-77
Net cash provided by (used in) operating activities	1,350	1,159
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Capital expenditures	-833	-959
Investments in and loans to unconsolidated affiliates	-30	-168
Acquisitions, net of cash acquired	'	-1,254
Purchases of held-to-maturity securities	-437	-456
Proceeds from sales and maturities of held-to-maturity securities	453	463
Purchases of available-for-sale securities	-13	-2,899
Proceeds from sales and maturities of available-for-sale securities	7	2,722
Distributions received from unconsolidated affiliates	242	13
Advances from (to) affiliates	'	0
Other changes in restricted funds	-1	1
Other	'	2
Net cash provided by (used in) investing activities	-612	-2,535
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Proceeds from the issuance of long-term debt	412	0
Payments for the redemption of long-term debt	-588	-51
Net increase (decrease) in commercial paper	-132	-175
Distributions to noncontrolling interests	-81	-69
Contributions from noncontrolling interests	112	'
Dividends paid on common stock	0	0
Proceeds from the issuance of SEP common units	191	190
Distributions and advances from (to) affiliates	-543	1,607
Other	-1	1
Net cash provided by (used in) financing activities	-630	1,503
Effect of exchange rate changes on cash	1	-3
Net increase (decrease) in cash and cash equivalents	109	124
Cash and cash equivalents at beginning of period	189	91
Cash and cash equivalents at end of period	298	215
Eliminations	'	'
CASH FLOWS FROM OPERATING ACTIVITIES	'	'
Net Income	-1,439	-1,357
Adjustments to reconcile net income to net cash provided by (used in) operating activities:	'	'
Equity in earnings of unconsolidated affiliates	0	0
Equity in earnings of consolidated subsidiaries	1,439	1,357
CASH FLOWS FROM INVESTING ACTIVITIES	'	'
Advances from (to) affiliates	-176	433
Net cash provided by (used in) investing activities	-176	433
CASH FLOWS FROM FINANCING ACTIVITIES	'	'
Net decrease in short-term borrowingsbconsolidated subsidiaries	'	9
Distributions and advances from (to) affiliates	176	-442
Net cash provided by (used in) financing activities	$176	($433)