Supplemental Financial Statement Information Table - Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 1,108	$ 590	$ 1,177	$ 372
Accounts receivable from related companies	51	63
Other current assets	307	312
Total current assets	8,042	6,536
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	3,633	4,014
INTANGIBLE ASSETS, net	5,504	2,264
GOODWILL	7,867	5,894
OTHER NON-CURRENT ASSETS, net	897	922
Total assets	64,681	50,330
Accounts payable	4,694	3,834
Accounts payable to related companies	6	14
Interest payable	410	357
Price risk management liabilities	9	53
Accrued and other current liabilities	2,108	1,678
Current maturities of long-term debt	1,345	637
Total current liabilities	8,431	6,500
LONG-TERM DEBT, less current maturities	28,508	22,562
PREFERRED UNITS OF SUBSIDIARY	32	32
OTHER NON-CURRENT LIABILITIES	1,060	1,019
COMMITMENTS AND CONTINGENCIES
General Partner	(1)	(3)
Common Unitholders	687	1,066
Class D Units	18	6
Accumulated other comprehensive income	5	9
Total partners’ capital	709	1,078
Total liabilities and equity	64,681	50,330
Parent Company [Member]
Cash and cash equivalents	9	8	100	9
Accounts receivable from related companies	13	5
Other current assets	1	0
Total current assets	23	13
ADVANCES TO AND INVESTMENTS IN UNCONSOLIDATED AFFILIATES	5,303	3,841
INTANGIBLE ASSETS, net	11	14
GOODWILL	9	9
OTHER NON-CURRENT ASSETS, net	49	41
Total assets	5,395	3,918
Accounts payable to related companies	77	11
Interest payable	63	24
Accrued and other current liabilities	3	3
Total current liabilities	143	38
LONG-TERM DEBT, less current maturities	4,540	2,801
OTHER NON-CURRENT LIABILITIES	3	1
COMMITMENTS AND CONTINGENCIES
General Partner	(1)	(3)
Common Unitholders	687	1,066
Class D Units	18	6
Accumulated other comprehensive income	5	9
Total partners’ capital	709	1,078
Total liabilities and equity	$ 5,395	$ 3,918