CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash Flows From Operating Activities
Net income	$ 78us-gaap_NetIncomeLoss	$ 194us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	293	225
Amortization of debt issuance cost	46us-gaap_AmortizationOfFinancingCosts	1us-gaap_AmortizationOfFinancingCosts
Deferred income taxes	49us-gaap_DeferredIncomeTaxExpenseBenefit	130us-gaap_DeferredIncomeTaxExpenseBenefit
Loss on derivatives excluding derivatives, settled	21us-gaap_UnrealizedGainLossOnDerivatives	62us-gaap_UnrealizedGainLossOnDerivatives
Stock-based compensation	6us-gaap_ShareBasedCompensation	4us-gaap_ShareBasedCompensation
Other		1
Change in assets and liabilities:
Accounts receivable	38	(78)
Inventories	(3)us-gaap_IncreaseDecreaseInInventories	1us-gaap_IncreaseDecreaseInInventories
Accounts payable	(35)	94
Taxes payable (receivable)	(20)	(13)
Interest payable	(1)	(10)
Other assets and liabilities	69	(2)
Net cash provided by operating activities	541	609
Cash Flows From Investing Activities
Capital investments	(508)	(525)
Acquisitions	(591)	(9)
Proceeds from sale of property and equipment	1	17
Other	3	1
Net cash used in investing activities	(1,095)	(516)
Cash Flows From Financing Activities
Payments on revolving long-term debt	(830)	(1,131)
Borrowings under revolving long-term debt	1,330	1,009
Change in bank drafts outstanding	(7)	19
Payments on short-term debt	(4,500)us-gaap_RepaymentsOfShortTermDebt
Proceeds from issuance of long-term debt	2,200
Debt issuance costs	(17)us-gaap_PaymentsOfDebtIssuanceCosts
Proceeds from exercise of common stock options		6
Proceeds from issuance of common stock	669
Proceeds from the issuance of mandatory convertible preferred stock	1,673
Net cash provided by (used in) financing activities	518	(97)
Decrease in cash and cash equivalents	(36)	(4)
Cash and cash equivalents at beginning of year	53	23
Cash and cash equivalents at end of period	$ 17	$ 19

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- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

+ References

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

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