Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES:
Net income (loss)	$ (18)	$ 43
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	137	125
Income from unconsolidated affiliates	(66)	(66)
Derivative valuation changes	17	(18)
Loss on asset sales, net	2	2
Unit-based compensation expenses	3	2
Cash flow changes in current assets and liabilities:
Trade accounts receivable, accrued revenues and related party receivables	(41)	29
Other current assets and other current liabilities	(51)	3
Trade accounts payable, accrued cost of gas and liquids, related party payables and deferred revenues	10	(69)
Distributions of earnings received from unconsolidated affiliates	71	63
Cash flow changes in other assets and liabilities	131	(12)
Net cash flows provided by operating activities	195	102
INVESTING ACTIVITIES:
Capital expenditures	(472)	(233)
Capital contributions to unconsolidated affiliates	(72)	(170)
Distributions in excess of earnings of unconsolidated affiliates	37	23
Acquisitions, net of cash received	(463)	0
Proceeds from asset sales	12	21
Net cash flows used in investing activities	(958)	(359)
FINANCING ACTIVITIES:
Net borrowings under revolving credit facility	343	183
Proceeds from issuance of senior notes	600	0
Redemption of senior notes	(163)	(88)
Debt issuance costs	(17)	(1)
Drafts payable	7	0
Partner distributions	(179)	(158)
Common unit offering, net of issuance costs	128	297
Distributions to Series A Preferred Units	(4)	(4)
Contributions from Noncontrolling Interests	12	10
Contributions from previous parent	0	33
Net cash flows provided by financing activities	727	272
Net change in cash and cash equivalents	(36)	15
Cash and cash equivalents at beginning of period	53	1
Cash and cash equivalents at end of period	17	16
Supplemental cash flow information:
Accrued capital expenditures	133	31
Accrued capital contribution to unconsolidated affiliate	22	28
Issuance of Class F and common units in connection with SUGS acquisition	$ 1,223	$ 0