Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES:
Net income (loss)	$ 24	$ 42
Reconciliation of net income to net cash flows provided by operating activities:
Depreciation and amortization, including debt issuance cost amortization and bond premium write-off and amortization	211	197
Income from unconsolidated affiliates	(103)	(87)
Derivative valuation changes	3	(11)
Loss on asset sales, net	1	2
Unit-based compensation expenses	5	3
Cash flow changes in current assets and liabilities:
Trade accounts receivable, accrued revenues and related party receivables	(73)	9
Other current assets and other current liabilities	(26)	53
Trade accounts payable, accrued cost of gas and liquids, related party payables and deferred revenues	103	(33)
Distributions of earnings received from unconsolidated affiliates	108	92
Cash flow changes in other assets and liabilities	128	(11)
Net cash flows provided by operating activities	381	256
INVESTING ACTIVITIES:
Capital expenditures	(762)	(380)
Capital contributions to unconsolidated affiliates	(125)	(273)
Distributions in excess of earnings of unconsolidated affiliates	232	50
Payments to Acquire Businesses, Net of Cash Acquired	(463)	0
Proceeds from asset sales	13	22
Net cash flows used in investing activities	(1,105)	(581)
FINANCING ACTIVITIES:
Borrowings (repayments) under revolving credit facility, net	(15)	363
Proceeds from issuances of senior notes	1,000	0
Redemptions of senior notes	(163)	(88)
Debt issuance costs	(24)	(1)
Drafts payable	8	(6)
Partner distributions and distributions on unvested unit awards	(282)	(240)
Common unit offering, net of issuance costs	0	297
Common units issued under equity distribution program, net of costs	149	15
Distributions to Series A preferred units	(5)	(6)
Contributions from noncontrolling interest	15	24
Contribution of Net Investment to the Partnership	0	2
Net cash flows provided by financing activities	683	360
Net change in cash and cash equivalents	(41)	35
Cash and cash equivalents at beginning of period	53	1
Cash and cash equivalents at end of period	12
Supplemental cash flow information:
Accrued capital expenditures	70	29
Accrued capital contribution to unconsolidated affiliate	0	13
Issuance of Class F and common units in connection with SUGS acquisition	$ 961	$ 0