CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Millions	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash Flows From Operating Activities
Net Income	$ 572.8	$ 592.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	451.2	450.5
Amortization of excess cost of equity investments	3.1	2.9
Non-cash compensation expense allocated from parent	89.9	2.7
Earnings from equity investments	(141.3)	(101.9)
Distributions from equity investments	135.7	101.9
Changes in components of working capital:
Accounts receivable	55.0	62.9
Inventories	12.1	(29.7)
Other current assets	(71.0)	(20.8)
Accounts payable	14.8	(42.7)
Accrued interest	4.3	10.3
Accrued taxes	18.9	(2.2)
Accrued liabilities	(9.8)	(13.0)
Rate reparations, refunds and other litigation reserve adjustments	102.0	(48.3)
Other, net	14.3	(32.9)
Net Cash Provided by Operating Activities	1,252.0	932.2
Cash Flows From Investing Activities
Acquisitions of investments	(65.9)	(929.7)
Acquisitions of assets	(44.1)	(218.1)
Capital expenditures	(535.4)	(451.1)
Sale or casualty of property, plant and equipment, and other net assets net of removal costs	16.6	22.5
Net proceeds from margin and restricted deposits	48.9	(3.9)
Contributions to equity investments	(60.1)	(180.9)
Distributions from equity investments in excess of cumulative earnings	121.2	93.3
Other, net (Investing)	0.1	0
Net Cash Used in Investing Activities	(518.7)	(1,667.9)
Cash Flows From Financing Activities
Issuance of debt	3,514.6	4,709.5
Payment of debt	(3,641.3)	(3,443.0)
Repayments from related party	1.4	1.3
Debt issue costs	(7.5)	(22.3)
(Decrease) Increase in cash book overdrafts	(13.2)	8.1
Proceeds from issuance of common units	705.8	433.2
Contributions from noncontrolling interests	13.1	7.2
Distributions to partners and noncontrolling interests:
Common units	(498.4)	(439.5)
Class B units	(12.1)	(11.3)
General Partner	(561.8)	(498.2)
Noncontrolling interests	(13.5)	(12.0)
Other, net (Financing)	0.1	0
Net Cash (Used in) Provided by Financing Activities	(512.8)	733.0
Effect of Exchange Rate Changes on Cash and Cash Equivalents	3.0	(0.8)
Net increase (decrease) in Cash and Cash Equivalents	223.5	(3.5)
Cash and Cash Equivalents, beginning of period	129.1	146.6
Cash and Cash Equivalents, end of period	352.6	143.1
Noncash Investing and Financing Activities
Assets acquired by the assumption or incurrence of liabilities	9.7	8.1
Assets acquired by the issuance of common units	23.7	81.7
Contribution of net assets to investments	7.9	0
Sale of investment ownership interest in exchange for note	4.1	0
Supplemental Disclosures of Cash Flow Information
Cash paid during the period for interest (net of capitalized interest)	260.8	224.7
Cash paid during the period for income taxes	$ 9.5	$ 7.9

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Noncash or Part Noncash Acquisition, Value of Assets Acquired: The value of an asset or business acquired by the noncash issuance of units. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Class B Units Financing.

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General Partner.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied, including those amounts held in discontinued operations.

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The cash inflow from a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. AND The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. AND The cash inflow from other borrowing not otherwise defined in the taxonomy.

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Transactions that do not result in cash inflows or outflows in the period in which they occur, but affect net income and thus are removed when calculating net cash flow from operating activities using the indirect cash flow method. This element is used when there is not a more specific and appropriate element.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.

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The net change between the beginning and ending balance of cash and cash equivalents.

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The effect of exchange rate changes on cash balances held in foreign currencies.

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This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporation; these investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities.

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The fair value of assets acquired in noncash investing or financing activities.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Change in recurring obligations of a business that arise from the acquisition of merchandise, materials, supplies and services used in the production and sale of goods and services.

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The net change during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

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The net change during the period in the amount of cash payments due to taxing authorities for taxes that are based on the reporting entity's earnings.

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The net change during the reporting period in the aggregate amount of expenses incurred but not yet paid.

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The net change during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.

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The net change during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities.

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The net change during the reporting period in other operating assets not otherwise defined in the taxonomy.

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The amount of cash paid during the current period for interest owed on money borrowed, net of interest capitalized.

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The net cash inflow (outflow) from financing activity for the period.

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The net cash inflow (outflow) from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities.

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The other noncash expense, not otherwise specified in the taxonomy, charged against earnings in the period to allocate the cost of tangible and intangible assets over their remaining economic lives.

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Other expenses included in net income that result in no cash inflows or outflows in the period which are not otherwise defined in the taxonomy.

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The net cash outflow (inflow) from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders.

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The cash outflow associated with other investments held by the entity for investment purposes not otherwise defined in the taxonomy.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or sale of an entity that is related to it but not strictly controlled.

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the issuance of common limited partners units during the period.

+ References

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow contributed by noncontrolled interest that purchase additional shares or otherwise increase their ownership stake in a subsidiary of the entity.

+ References

+ Details

Name:	us-gaap_ProceedsFromMinorityShareholders
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net cash inflow (outflow) from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 18, 19, 20

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 5
-Subparagraph b

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration