Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 812	$ 648
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	599	584
Deferred income tax expense	143	78
(Earnings) loss from equity investments	(100)	117
Distributions from equity investments	88	145
Other	57	251
Net cash provided by (used in) operating activities	1,599	1,823
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,407)	(1,817)
Investments in and loans to unconsolidated affiliates	(181)	(91)
Purchase of intangible, net	(80)	0
Disposition	204	0
Purchases of held-to-maturity securities	(479)	(463)
Proceeds from sales and maturities of held-to-maturity securities	475	457
Purchases of available-for-sale securities	(565)	0
Proceeds from sales and maturities of available-for-sale securities	559	1
Distributions from equity investments	45	441
Distribution to equity investment	(148)	0
Other changes in restricted funds	(19)	(24)
Other	1	(7)
Net cash provided by (used in) investing activities	(2,595)	(1,503)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	382	1,332
Payments for the redemption of long-term debt	(619)	(153)
Net increase (decrease) in commercial paper	502	(984)
Distributions to noncontrolling interests	(176)	(140)
Contributions from noncontrolling interests	437	164
Proceeds from the issuances of Spectra Energy common stock	878	0
Proceeds from the issuances of Spectra Energy Partners, LP common units	473	351
Proceeds from the issuance of Westcoast Energy Inc. preferred stock	229	0
Dividends paid on common stock	(842)	(747)
Other	(20)	(14)
Net cash provided by (used in) financing activities	1,244	(191)
Effect of exchange rate changes on cash	3	(6)
Net increase in cash and cash equivalents	251	123
Cash and cash equivalents at beginning of period	213	215
Cash and cash equivalents at end of period	464	338
Supplemental Disclosures
Property, plant and equipment non-cash accruals	$ 374	$ 276