Supplemental Financial Statement Information Schedule of Statements of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	$ (148)	$ (157)
Interest expense	(315)	(310)
Equity in earnings of unconsolidated affiliates	104	90
Losses on interest rate derivatives	(2)	6
Other, net	2	(19)
Income tax expense (benefit)	145	(2)
NET INCOME ATTRIBUTABLE TO PARTNERS	168	90
GENERAL PARTNER’S INTEREST IN NET INCOME	0	0
Class D Unitholder's interest in Net Income	1	0
LIMITED PARTNERS' INTEREST IN NET INCOME	167	90
Parent Company [Member]
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	(31)	(6)
Interest expense	(40)	(64)
Equity in earnings of unconsolidated affiliates	239	168
Other, net	0	(8)
INCOME BEFORE INCOME TAXES	168	90
Income tax expense (benefit)	0	0
NET INCOME ATTRIBUTABLE TO PARTNERS	168	90
GENERAL PARTNER’S INTEREST IN NET INCOME	0	0
Class D Unitholder's interest in Net Income	1	0
LIMITED PARTNERS' INTEREST IN NET INCOME	$ 167	$ 90