Reportable Segments (Financial information by segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Adjusted EBITDA									$ 3,953	$ 2,744	$ 1,781
Depreciation and amortization									(1,032)	(656)	(405)
Interest expense, net of interest capitalized									(849)	(665)	(474)
Gain on deconsolidation of Propane Business									0	1,057	0
Equity Method Investment, Realized Gain (Loss) on Disposal									87	0	0
Goodwill impairment									(689)	0	0
Gains (losses) on interest rate derivatives									44	(4)	(77)
Non-cash compensation expense									(47)	(42)	(38)
Unrealized gains (losses) on commodity risk management activities									51	(9)	(11)
Inventory, LIFO Reserve, Effect on Income, Net									3	(75)	0
Loss on extinguishment of debt									0	(115)	0
Environmental Remediation Expense									168	0	0
Adjusted EBITDA attributable to discontinued operations									(76)	(99)	(23)
Proportionate share of unconsolidated affiliates' interest, depreciation and allowance for equity funds used during construction									(629)	(480)	(56)
Equity in earnings of unconsolidated affiliates									172	142	26
Other, net									12	22	(4)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAX EXPENSE									832	1,820	719
Revenues	12,032	11,902	11,551	10,854	10,981	1,802	1,596	1,323	46,339	15,702	6,799
Cost of products sold									41,204	12,266	4,175
Assets	43,702				43,230				43,702	43,230	15,519
Property, Plant and Equipment, Additions									2,455	3,049	1,484
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	4,436				3,502				4,436	3,502	201
Intrastate Transportation And Storage [Member]
Adjusted EBITDA									464	601	667
Depreciation and amortization									(122)	(122)	(120)
Goodwill impairment									0
Equity in earnings of unconsolidated affiliates									0	4	2
Revenues									2,452	2,191	2,674
Cost of products sold									1,737	1,394	1,774
Assets	4,606				4,691				4,606	4,691	4,785
Property, Plant and Equipment, Additions									47	37	53
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	1				2				1	2	1
Intrastate Transportation And Storage [Member] | External Customers [Member]
Revenues									2,250	2,012	2,398
Intrastate Transportation And Storage [Member] | Intersegment [Member]
Revenues									202	179	276
Interstate Transportation and Storage [Member]
Adjusted EBITDA									1,269	1,013	373
Depreciation and amortization									(244)	(209)	(81)
Goodwill impairment									(689)	0	0
Equity in earnings of unconsolidated affiliates									142	120	24
Revenues									1,309	1,109	447
Assets	10,988				11,794				10,988	11,794	3,661
Property, Plant and Equipment, Additions									152	133	207
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	2,040				2,142				2,040	2,142	173
Interstate Transportation and Storage [Member] | External Customers [Member]
Revenues									1,270	1,109	447
Interstate Transportation and Storage [Member] | Intersegment [Member]
Revenues									39	0	0
Midstream [Member]
Adjusted EBITDA									479	467	421
Depreciation and amortization									(172)	(168)	(85)
Goodwill impairment									0
Equity in earnings of unconsolidated affiliates									0	(9)	0
Revenues									2,249	1,953	1,483
Cost of products sold									1,579	1,273	988
Assets	3,133				4,946				3,133	4,946	2,513
Property, Plant and Equipment, Additions									565	1,317	837
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	0				1				0	1	0
Midstream [Member] | External Customers [Member]
Revenues									1,307	1,757	1,082
Midstream [Member] | Intersegment [Member]
Revenues									942	196	401
NGL Transportation And Services [Member]
Adjusted EBITDA									351	209	127
Depreciation and amortization									(91)	(53)	(32)
Goodwill impairment									0
Equity in earnings of unconsolidated affiliates									(2)	2	0
Revenues									2,127	650	397
Cost of products sold									1,655	361	218
Assets	4,326				3,765				4,326	3,765	2,360
Property, Plant and Equipment, Additions									443	1,302	325
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	29				29				29	29	27
NGL Transportation And Services [Member] | External Customers [Member]
Revenues									2,063	619	363
NGL Transportation And Services [Member] | Intersegment [Member]
Revenues									64	31	34
Investment in Sunoco Logistics [Member]
Adjusted EBITDA									871	219	0
Depreciation and amortization									(265)	(63)	0
Goodwill impairment									0
Equity in earnings of unconsolidated affiliates									18	5	0
Revenues									16,639	3,189	0
Cost of products sold									15,574	2,885	0
Assets	11,650				10,291				11,650	10,291	0
Property, Plant and Equipment, Additions									1,018	139	0
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	125				118				125	118	0
Investment in Sunoco Logistics [Member] | External Customers [Member]
Revenues									16,480	3,109	0
Investment in Sunoco Logistics [Member] | Intersegment [Member]
Revenues									159	80	0
Retail Marketing [Member]
Adjusted EBITDA									325	109	0
Depreciation and amortization									(114)	(28)	0
Goodwill impairment									0
Equity in earnings of unconsolidated affiliates									2	1	0
Revenues									21,012	5,926	0
Cost of products sold									20,150	5,757	0
Assets	3,936				3,926				3,936	3,926	0
Property, Plant and Equipment, Additions									176	58	0
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	22				21				22	21	0
Retail Marketing [Member] | External Customers [Member]
Revenues									21,004	5,926	0
Retail Marketing [Member] | Intersegment [Member]
Revenues									8	0	0
Other Segments [Member]
Adjusted EBITDA									194	126	193
Depreciation and amortization									(24)	(13)	(87)
Goodwill impairment									0
Equity in earnings of unconsolidated affiliates									12	19	0
Revenues									2,367	1,555	2,888
Cost of products sold									2,309	1,496	2,274
Assets	5,063				3,817				5,063	3,817	2,200
Property, Plant and Equipment, Additions									54	63	62
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	2,219				1,189				2,219	1,189	0
Other Segments [Member] | External Customers [Member]
Revenues									1,965	1,170	2,509
Other Segments [Member] | Intersegment [Member]
Revenues									402	385	379
Intersegment Eliminations [Member]
Revenues									(1,816)	(871)	(1,090)
Cost of products sold									$ (1,800)	$ (900)	$ (1,079)