Supplemental Financial Statement Information Table - Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 1,234	$ 590	$ 621	$ 372
Accounts receivable from related companies	46	63
Other current assets	272	312
Total current assets	7,652	6,536
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	3,686	4,014
INTANGIBLE ASSETS, net	5,072	2,264
GOODWILL	6,230	5,894
OTHER NON-CURRENT ASSETS, net	857	922
Total assets	58,615	50,330
Accounts payable	4,317	3,834
Accounts payable to related companies	23	14
Interest payable	427	357
Price risk management liabilities	68	53
Accrued and other current liabilities	2,196	1,678
Current maturities of long-term debt	1,346	637
Total current liabilities	8,222	6,500
LONG-TERM DEBT, less current maturities	25,851	22,562
PREFERRED UNITS OF SUBSIDIARY	32	32
OTHER NON-CURRENT LIABILITIES	1,018	1,019
COMMITMENTS AND CONTINGENCIES
General Partner	(1)	(3)
Limited Partners	563	1,066
Class D Units	14	6
Accumulated other comprehensive income	6	9
Total partners’ capital	582	1,078
Total liabilities and equity	58,615	50,330
Parent Company [Member]
Cash and cash equivalents	31	8	72	9
Accounts receivable from related companies	7	5
Other current assets	1	0
Total current assets	39	13
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	4,768	3,841
INTANGIBLE ASSETS, net	12	14
GOODWILL	9	9
OTHER NON-CURRENT ASSETS, net	50	41
Total assets	4,878	3,918
Accounts payable to related companies	87	11
Interest payable	66	24
Accrued and other current liabilities	2	3
Total current liabilities	155	38
LONG-TERM DEBT, less current maturities	4,140	2,801
OTHER NON-CURRENT LIABILITIES	1	1
COMMITMENTS AND CONTINGENCIES
General Partner	(1)	(3)
Limited Partners	563	1,066
Class D Units	14	6
Accumulated other comprehensive income	6	9
Total partners’ capital	582	1,078
Total liabilities and equity	$ 4,878	$ 3,918