10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)                                        

( X )	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended September 30, 2012

or

( )	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from ____________ to ____________

Commission File Number: 1-16463

PEABODY ENERGY CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	13-4004153
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

701 Market Street, St. Louis, Missouri	63101-1826
(Address of principal executive offices)	(Zip Code)

(314) 342-3400

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ( X )    No ( )

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ( X )   No ( )

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ( X )	Accelerated filer ( )
Non-accelerated filer ( )	Smaller reporting company ( )
(Do not check if a smaller reporting company)

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ( )  No ( X )

There were 268,385,935 shares of the registrant's common stock (par value of $0.01 per share) outstanding at November 2, 2012.

INDEX

	Page
PART I — FINANCIAL INFORMATION
Item 1. Financial Statements.	1
Unaudited Condensed Consolidated Statements of Income for the Three and Nine Months Ended September 30, 2012 and 2011	1
Unaudited Condensed Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2012 and 2011	2
Condensed Consolidated Balance Sheets as of September 30, 2012 (Unaudited) and December 31, 2011	3
Unaudited Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2012 and 2011	4
Unaudited Consolidated Statements of Changes in Stockholders’ Equity for the Nine Months Ended September 30, 2012	5
Notes to Unaudited Condensed Consolidated Financial Statements	6
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	43
Item 3. Quantitative and Qualitative Disclosures About Market Risk	61
Item 4. Controls and Procedures	61
PART II — OTHER INFORMATION
Item 1. Legal Proceedings	62
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	62
Item 4. Mine Safety Disclosures	63
Item 6. Exhibits	64
SIGNATURE	65
EXHIBIT INDEX	66
EX-10.3
EX-10.4
EX-10.5
EX-31.1
EX-31.2
EX-32.1
EX-32.2
EX-95
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements.

PEABODY ENERGY CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions, except per share data)
Revenues
Sales	$	1,797.2		$	1,682.2		$	5,282.0		$	5,029.4
Other revenues	261.6			298.4			778.6			636.7
Total revenues	2,058.8			1,980.6			6,060.6			5,666.1
Costs and expenses
Operating costs and expenses	1,509.0			1,399.4			4,396.8			3,958.7
Depreciation, depletion and amortization	172.5			108.4			470.7			317.6
Asset retirement obligation expenses	21.1			14.6			53.3			43.3
Selling and administrative expenses	68.7			71.2			202.4			191.4
Other operating (income) loss:
Net gain on disposal or exchange of assets	(0.2		)	(1.7		)	(7.6		)	(31.4		)
Loss from equity affiliates	21.2			3.2			50.5			9.0
Operating profit	266.5			385.5			894.5			1,177.5
Interest expense	99.4			59.2			308.3			159.1
Interest income	(5.1		)	(4.1		)	(19.7		)	(11.7		)
Income from continuing operations before income taxes	172.2			330.4			605.9			1,030.1
Income tax provision	49.3			39.2			85.5			238.8
Income from continuing operations, net of income taxes	122.9			291.2			520.4			791.3
Loss from discontinued operations, net of income taxes	(81.3		)	(9.7		)	(92.7		)	(38.9		)
Net income	41.6			281.5			427.7			752.4
Less: Net (loss) income attributable to noncontrolling interests	(1.3		)	7.4			7.4			17.0
Net income attributable to common stockholders	$	42.9		$	274.1		$	420.3		$	735.4
Income From Continuing Operations
Basic earnings per share	$	0.46		$	1.05		$	1.89		$	2.86
Diluted earnings per share	$	0.46		$	1.04		$	1.89		$	2.84
Net Income Attributable to Common Stockholders
Basic earnings per share	$	0.16		$	1.01		$	1.55		$	2.72
Diluted earnings per share	$	0.16		$	1.00		$	1.55		$	2.71
Dividends declared per share	$	0.085		$	0.085		$	0.255		$	0.255

See accompanying notes to unaudited condensed consolidated financial statements.

1

PEABODY ENERGY CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Net income	$	41.6		$	281.5		$	427.7		$	752.4
Other comprehensive income, net of income taxes:
Net unrealized holding losses on available-for-sale securities (net of respective tax benefits of $3.0, $2.0, $11.2 and $2.3)
Unrealized holding losses on available-for-sale securities	(5.1		)	(4.4		)	(19.2		)	(4.2		)
Less: Reclassification for realized gains included in net income	—			(0.1		)	—			(0.1		)
Net unrealized holding losses on available-for-sale securities	(5.1		)	(4.5		)	(19.2		)	(4.3		)
Net unrealized gains (losses) on cash flow hedges (net of respective tax provision (benefit) of $36.8, ($140.3), $39.7 and ($66.7))
Increase (decrease) in fair value of cash flow hedges	111.5			(135.9		)	302.0			79.7
Less: Reclassification for realized gains included in net income	(57.7		)	(61.5		)	(179.2		)	(180.3		)
Net unrealized gains (losses) on cash flow hedges	53.8			(197.4		)	122.8			(100.6		)
Postretirement plans and workers' compensation obligations (net of respective tax provisions of $8.1, $6.3, $24.2 and $12.8)
Net actuarial loss for the period	—			—			—			3.5
Amortization of actuarial loss and prior service cost	13.9			10.2			41.6			30.2
Postretirement plan and workers' compensation obligations	13.9			10.2			41.6			33.7
Foreign currency translation adjustment	13.8			—			20.4			—
Other comprehensive income (loss)	76.4			(191.7		)	165.6			(71.2		)
Comprehensive income	118.0			89.8			593.3			681.2
Less: Comprehensive (loss) income attributable to noncontrolling interests	(1.3		)	7.4			7.4			17.0
Comprehensive income attributable to common stockholders	$	119.3		$	82.4		$	585.9		$	664.2

See accompanying notes to unaudited condensed consolidated financial statements.

2

PEABODY ENERGY CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

	(Unaudited)
	September 30, 2012			December 31, 2011
	(Amounts in millions, except per share data)
ASSETS
Current assets
Cash and cash equivalents	$	648.0		$	799.1
Accounts receivable, net of allowance for doubtful accounts of $15.2 at September 30,    2012 and $17.0 at December 31, 2011	682.2			922.5
Inventories	554.9			444.4
Assets from coal trading activities, net	56.2			44.6
Deferred income taxes	15.8			27.3
Other current assets	697.6			768.0
Total current assets	2,654.7			3,005.9
Property, plant, equipment and mine development
Land and coal interests	11,875.2			10,630.5
Buildings and improvements	1,268.3			1,084.2
Machinery and equipment	3,175.8			2,857.3
Less: accumulated depreciation, depletion and amortization	(3,808.2		)	(3,320.4		)
Property, plant, equipment and mine development, net	12,511.1			11,251.6
Investments and other assets	1,684.6			2,475.5
Total assets	$	16,850.4		$	16,733.0
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities
Current maturities of long-term debt	$	124.8		$	101.1
Liabilities from coal trading activities, net	19.9			10.3
Accounts payable and accrued expenses	1,645.1			1,712.3
Total current liabilities	1,789.8			1,823.7
Long-term debt, less current maturities	6,238.3			6,556.4
Deferred income taxes	385.0			523.2
Asset retirement obligations	662.4			615.2
Accrued postretirement benefit costs	1,054.3			1,053.1
Other noncurrent liabilities	743.6			645.6
Total liabilities	10,873.4			11,217.2
Stockholders’ equity
Preferred Stock — $0.01 per share par value; 10.0 shares authorized; no shares    issued or outstanding as of September 30, 2012 or December 31, 2011	—			—
Series A Junior Participating Preferred Stock — $0.01 per share par value; no shares authorized as of September 30, 2012 and 1.5 shares authorized as of December 31, 2011; no shares issued or outstanding as of September 30, 2012 or December 31, 2011	n.a.			—
Perpetual Preferred Stock — 0.8 shares authorized, no shares issued or outstanding    as of September 30, 2012 or December 31, 2011	—			—
Series Common Stock — $0.01 per share par value; 40.0 shares authorized, no    shares issued or outstanding as of September 30, 2012 or December 31, 2011	—			—
Common Stock — $0.01 per share par value; 800.0 shares authorized, 282.0 shares issued and 268.3 shares outstanding as of September 30, 2012 and 280.3 shares issued and 271.1 shares outstanding as of December 31, 2011	2.8			2.8
Additional paid-in capital	2,284.9			2,234.0
Retained earnings	4,095.2			3,744.0
Accumulated other comprehensive income (loss)	23.2			(142.4		)
Treasury shares, at cost: 13.7 shares as of September 30, 2012 and 9.2    shares as of December 31, 2011	(461.5		)	(353.3		)
Peabody Energy Corporation’s stockholders’ equity	5,944.6			5,485.1
Noncontrolling interests	32.4			30.7
Total stockholders’ equity	5,977.0			5,515.8
Total liabilities and stockholders’ equity	$	16,850.4		$	16,733.0

See accompanying notes to unaudited condensed consolidated financial statements.

3

PEABODY ENERGY CORPORATION

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

	Nine Months Ended September 30,
	2012			2011
	(Dollars in millions)
Cash Flows From Operating Activities
Net income	$	427.7		$	752.4
Loss from discontinued operations, net of income taxes	92.7			38.9
Income from continuing operations, net of income taxes	520.4			791.3
Adjustments to reconcile income from continuing operations, net of income taxes to net    cash provided by operating activities:
Depreciation, depletion and amortization	470.7			317.6
Deferred income taxes	(162.6		)	48.2
Share-based compensation	34.9			32.4
Net gain on disposal or exchange of assets	(7.6		)	(31.4		)
Loss from equity affiliates	50.5			9.0
Changes in current assets and liabilities:
Accounts receivable	259.0			(11.8		)
Change in receivable from accounts receivable securitization program	(50.0		)	—
Inventories	(117.4		)	(12.3		)
Net assets from coal trading activities	145.6			71.7
Other current assets	42.7			(42.3		)
Accounts payable and accrued expenses	84.6			(15.6		)
Asset retirement obligations	55.6			27.2
Accrued postretirement benefit costs	27.7			26.6
Pension costs	26.0			25.5
Contributions to pension plans	(1.3		)	(1.3		)
Other, net	(5.1		)	(18.1		)
Net cash provided by continuing operations	1,373.7			1,216.7
Net cash used in discontinued operations	(82.2		)	(26.2		)
Net cash provided by operating activities	1,291.5			1,190.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	(732.1		)	(553.4		)
Federal coal lease expenditures	(247.9		)	(42.4		)
Investment in Prairie State Energy Campus	(9.4		)	(29.8		)
Proceeds from disposal of assets	93.5			12.1
Investments in equity affiliates and joint ventures	—			(39.8		)
Proceeds from sales and maturities of debt and equity securities	39.0			53.3
Purchases of debt and equity securities	(23.8		)	(44.1		)
Purchases of short-term investments	—			(100.0		)
Proceeds from sale of short term investments	—			100.0
Investment in shares of Macarthur Coal Limited	—			(45.5		)
Contributions to joint ventures	(531.2		)	—
Distributions from joint ventures	527.7			—
Repayment of loans from related parties	720.2			—
Advances to related parties	(743.4		)	—
Other, net	(3.2		)	(4.4		)
Net cash used in continuing operations	(910.6		)	(694.0		)
Net cash used in discontinued operations	(11.2		)	(62.8		)
Net cash used in investing activities	(921.8		)	(756.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(305.7		)	(248.4		)
Common stock repurchase	(99.9		)	—
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	(49.8		)	—
Dividends paid	(69.1		)	(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(8.3		)	(16.1		)
Excess tax benefits related to share-based compensation	3.6			6.1
Other, net	8.4			0.2
Net cash used in financing activities	(520.8		)	(327.3		)
Net change in cash and cash equivalents	(151.1		)	106.4
Cash and cash equivalents at beginning of period	799.1			1,295.2
Cash and cash equivalents at end of period	$	648.0		$	1,401.6

See accompanying notes to unaudited condensed consolidated financial statements.

4

PEABODY ENERGY CORPORATION

UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

	Peabody Energy Corporation’s Stockholders’ Equity
	Common Stock		Additional Paid-in Capital		Treasury Stock			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Noncontrolling Interests			Total Stockholders’ Equity
	(Dollars in millions)
December 31, 2011	$	2.8	$	2,234.0	$	(353.3	)	$	3,744.0		$	(142.4	)	$	30.7		$	5,515.8
Net income	—		—		—			420.3			—			7.4			427.7
Net unrealized losses on      available-for-sale      securities (net of      $11.2 tax benefit)	—		—		—			—			(19.2		)	—			(19.2		)
Increase in fair value      of cash flow hedges      (net of $39.7 tax      provision)	—		—		—			—			122.8			—			122.8
Postretirement plans      and workers’      compensation      obligations (net of      $24.2 tax provision)	—		—		—			—			41.6			—			41.6
Foreign currency     translation adjustment	—		—		—			—			20.4			—			20.4
Dividends paid	—		—		—			(69.1		)	—			—			(69.1		)
Share-based compensation	—		34.9		—			—			—			—			34.9
Excess tax benefits related      to share-based      compensation	—		3.6		—			—			—			—			3.6
Stock options exercised	—		1.7		—			—			—			—			1.7
Employee stock purchases	—		7.1		—			—			—			—			7.1
Repurchase of employee      common stock      relinquished for tax      withholding	—		—		(8.3		)	—			—			—			(8.3		)
Common stock repurchase	—		—		(99.9		)	—			—			—			(99.9		)
MCG Coal Holdings Pty Ltd noncontrolling      interests at conversion	—		—		—			—			—			53.4			53.4
Acquisition of MCG Coal Holdings Pty Ltd      noncontrolling interests	—		3.6		—			—			—			(53.4		)	(49.8		)
Distributions to      noncontrolling interests	—		—		—			—			—			(5.7		)	(5.7		)
September 30, 2012	$	2.8	$	2,284.9	$	(461.5	)	$	4,095.2		$	23.2		$	32.4		$	5,977.0

See accompanying notes to unaudited condensed consolidated financial statements.

5

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(1)     Basis of Presentation

The condensed consolidated financial statements include the accounts of Peabody Energy Corporation (the Company) and its affiliates. All intercompany transactions, profits and balances have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's 2011 Annual Report on Form 10-K. In the opinion of management, these financial statements reflect all normal, recurring adjustments necessary for a fair presentation. Balance sheet information presented herein as of December 31, 2011 has been derived from the Company’s audited consolidated balance sheet at that date. The results of operations for the three and nine months ended September 30, 2012 are not necessarily indicative of the results that may be expected for future quarters or for the year ending December 31, 2012.

The Company classifies items within discontinued operations in the unaudited condensed consolidated financial statements when the operations and cash flows of a particular component of the Company have been (or will be) eliminated from the ongoing operations of the Company as a result of a disposal (by sale or otherwise) and the Company will no longer have any significant continuing involvement in the operation of that component.

(2)    Newly Adopted Accounting Standards and Accounting Standards Not Yet Implemented

In December 2011, the Financial Accounting Standards Board (FASB) issued accounting guidance requiring additional information intended to help reconcile existing differences in balance sheet offsetting requirements under U.S. GAAP and International Financial Reporting Standards (IFRS). While this standard leaves existing guidance surrounding the offsetting of financial assets and liabilities unchanged, it requires several additional disclosures, including gross and net information about instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to a master netting arrangement or similar agreement. The guidance will become effective for annual reporting periods beginning on or after January 1, 2013 and interim periods within those annual periods (January 1, 2013 for the Company). While the adoption of this guidance will impact the Company's disclosures, it will not affect the Company's results of operations, financial condition or cash flows.

In January 2010, the FASB issued accounting guidance that required new fair value disclosures, including disclosures about significant transfers into and out of Level 1 and Level 2 categories of the fair value hierarchy and a description of the reasons for the transfers. In addition, the guidance required new disclosures regarding activity in Level 3 fair value measurements, including a gross basis reconciliation. The Company began complying with the new fair value disclosure requirements beginning January 1, 2010, except for the disclosure of activity within Level 3 fair value measurements, which became effective January 1, 2011. In May 2011, the FASB issued additional fair value measurement disclosure requirements intended to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and IFRS. That update required fair value hierarchy categorization for financial instruments not measured at fair value but for which disclosure of fair value is required, disclosure of all transfers between Level 1 and Level 2 categories and additional disclosures for Level 3 measurements regarding the sensitivity of fair value to changes in unobservable inputs and any interrelationships between those inputs. The guidance became effective for interim and annual periods beginning after December 15, 2011 (January 1, 2012 for the Company). While the adoption of this guidance impacted the Company's disclosures, it did not affect the Company's results of operations, financial condition or cash flows.

6

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(3)    Acquisition of Macarthur Coal Limited

On October 23, 2011, PEAMCoal Pty Ltd (PEAMCoal), an Australian company that was then indirectly owned 60% by the Company and 40% by ArcelorMittal, acquired a majority interest in Macarthur Coal Limited (PEA-PCI or the acquiree) through an all cash off-market takeover offer. On October 26, 2011 (the acquisition and control date), the Company appointed its nominees to the acquiree's Board of Directors and executive management team. The acquisition was completed on December 20, 2011 as PEAMCoal acquired all of the acquirees's remaining outstanding shares of common stock for $4.8 billion, net of $261.2 million of acquired cash, of which the Company's share was $2.8 billion (PEA-PCI acquisition). PEAMCoal accounted for share acceptances under the takeover process as a single transaction occurring on October 26, 2011. On December 21, 2011, the Company acquired ArcelorMittal Mining Australasia B.V., an indirect subsidiary of ArcelorMittal that indirectly owned 40% of PEAMCoal, for $2.0 billion resulting in the Company's 100% ownership of PEA-PCI.

The preliminary purchase accounting allocations were recorded in the accompanying unaudited condensed consolidated financial statements as of, and for the periods subsequent to, the acquisition and control date. The Company has not yet finalized the fair value determination of the assets acquired and liabilities assumed, which is expected once third-party valuation appraisals are completed. The Company is evaluating mine lives and reviewing coal reserve studies on the acquired properties, the outcome of which will determine the final fair value allocated to coal reserve assets. The following table summarizes the preliminary estimated fair values of assets acquired and liabilities assumed that were recognized at the acquisition and control date, as well as provisional fair value adjustments made during the first nine months of 2012:

	Preliminary						Updated
	Allocations			Adjustments			Allocations
	(Dollars in millions)
Accounts receivable, net	$	106.6		$	8.8		$	115.4
Inventories	67.1			(10.5		)	56.6
Other current assets	137.5			(3.9		)	133.6
Property, plant, equipment and mine development	3,457.0			258.6			3,715.6
Investments and other assets	1,275.1			(184.3		)	1,090.8
Current maturities of long-term debt	(11.0		)	—			(11.0		)
Accounts payable and accrued expenses	(133.8		)	(26.1		)	(159.9		)
Long-term debt, less current maturities	(59.2		)	—			(59.2		)
Asset retirement obligations	(39.3		)	(15.2		)	(54.5		)
Other noncurrent liabilities	(31.4		)	(27.4		)	(58.8		)
Noncontrolling interests	(2,011.9		)	—			(2,011.9		)
Total purchase price, net of cash acquired of $261.2	$	2,756.7		$	—		$	2,756.7

The adjustments to the provisional fair values result from additional information obtained about facts in existence at the acquisition and control date. Cumulative adjustments to provisional fair values recorded in the current period are assumed to have been made as of the acquisition and control date. Prior financial statements have not been retroactively adjusted due to immateriality. Accordingly, "Depreciation, depletion and amortization" was decreased by $4.7 million and $12.2 million for the three and nine months ended September 30, 2012, respectively. "Asset retirement obligation expenses” were increased by $3.7 million for the three and nine months ended September 30, 2012. "Operating costs and expenses" were decreased by $10.1 million for the nine months ended September 30, 2012, with the entire impact recognized during the first quarter of 2012.

7

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In connection with the PEA-PCI acquisition, the Company acquired contract-based obligations consisting of port, rail and water take-or-pay obligations and recorded a liability for unutilized capacity of $58.5 million, net of tax, which is being amortized based on that unutilized capacity over the terms of the applicable agreements which extend to 2018. As of September 30, 2012, the carrying value of the liability was $47.4 million and the associated amortization (which is classified as a reduction to “Operating costs and expenses” in the unaudited condensed consolidated statements of income) recorded during the three and nine months ended September 30, 2012 was $3.8 million and $11.1 million, respectively. Estimated future amortization of the remaining carrying value of the liability as of September 30, 2012 is expected to be $3.7 million, $18.1 million, $15.6 million and $10.0 million for the years ending December 31, 2012, 2013, 2014 and 2015, respectively. Unutilized capacity is not expected in years 2016 through 2018.

During the three and nine months ended September 30, 2012, PEA-PCI contributed revenues of $182.5 million and $479.5 million, respectively, and income before income taxes of $4.4 million and loss before income taxes of $98.7 million, respectively, which includes results from our equity affiliate investment in the Middlemount Mine. Due to the restructuring of the Company's Australian tax entities during the second quarter of 2012 described in Note 10, it is no longer practicable to calculate the net income of PEA-PCI on a standalone basis. The results of PEA-PCI for the three and nine months ended September 30, 2012 are included in the unaudited condensed consolidated statements of income and are reported in the Australian Mining segment, except for the activity associated with certain equity affiliates which is reflected in the Corporate and Other segment.

The following unaudited pro forma financial information presents the combined results of operations of the Company and PEA-PCI, on a pro forma basis, as though the companies had been combined as of January 1, 2010. The unaudited pro forma financial information does not necessarily reflect the results of operations that would have occurred had the Company and PEA-PCI constituted a single entity during those periods or that may be attained in the future.

	Three Months Ended		Nine Months Ended
	September 30, 2011		September 30, 2011
	(Dollars in millions, except per share amounts)
Revenue	$	2,194.1	$	6,154.7
Income from continuing operations, net of income taxes	256.0		727.6
Basic earnings per share	$	0.88	$	2.48
Diluted earnings per share	0.87		2.48

Pro forma income from continuing operations, net of income taxes, includes adjustments to operating costs and depreciation, depletion and amortization to reflect the additional expense for the estimated impact of fair value adjustments to coal inventory and property, plant and equipment (including mineral rights), respectively, as well as additional expense associated with the estimated impact of reflecting the equity affiliate interest at fair value.

As disclosed in Note 23 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011, a then-outstanding loan receivable balance of $384.6 million was converted to a 90% equity interest in MCG Coal Holdings Pty Ltd. (MCGH) in January 2012, resulting in consolidation of MCGH and recognition of noncontrolling interests of $53.4 million at conversion. In June 2012, the Company acquired the remaining noncontrolling interest in MCGH for total consideration of $49.8 million. This acquisition was accounted for as an equity transaction as the Company previously maintained control of MCGH. Accordingly, the Company recorded an increase to additional paid-in capital of $3.6 million in the second quarter 2012 related to this transaction, representing the difference in the price paid and the carrying value.

(4)    Discontinued Operations

Discontinued operations include certain non-strategic Midwestern U.S. and Australian Mining segment assets held for sale which the Company has committed to divest, Midwestern U.S. Mining segment assets that have ceased production and other previously divested operations.

8

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In September 2012, the Company announced it had permanently ceased production at its Air Quality Mine in Indiana due to uneconomic market conditions for the type of coal product previously produced at the site. The results of the mine, which were previously included within the Midwestern U.S. Mining reportable segment, have been reported as a discontinued operation for all periods presented because the operations and cash flows of the mine and related coal product have been eliminated from the ongoing operations of the Company as a result of the mine closure. Loss from discontinued operations for the three and nine months ended September 30, 2012 includes before- and after-tax charges of $116.7 million and $75.0 million, respectively, including a before- and after-tax impairment charge of $108.9 million and $68.8 million, respectively, recognized in connection with the shutdown of this mine.

Results from discontinued operations were as follows during the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(Dollars in millions)
Total revenues	$	41.5	$	55.3	$	171.5	$	122.7
Loss from discontinued operations before income taxes	$	127.6	$	12.1	$	146.6	$	53.9
Income tax benefit	46.3		2.4		53.9		15.0
Loss from discontinued operations, net of income taxes	$	81.3	$	9.7	$	92.7	$	38.9

Assets and liabilities classified as discontinued operations included in our condensed consolidated balance sheets were as follows:

	(Unaudited)
	September 30, 2012		December 31, 2011
	(Dollars in millions)
Assets:
Other current assets	$	48.4	$	24.6
Investments and other assets	135.2		232.2
Total assets classified as discontinued operations	$	183.6	$	256.8
Liabilities:
Accounts payable and accrued expenses	$	33.4	$	63.9
Other noncurrent liabilities	59.8		59.6
Total liabilities classified as discontinued operations	$	93.2	$	123.5

(5)     Investments

The Company’s short-term investments are defined as those investments with original maturities of greater than three months and up to one year included in "Other current assets" in the condensed consolidated balance sheets. Long-term investments are defined as those investments with original maturities greater than one year included in "Investments and other assets" in the condensed consolidated balance sheets.

The Company classifies its investments in debt securities as either held-to-maturity or available-for-sale at the time of purchase and reevaluates such designation periodically. Such investments are classified as held-to-maturity when the Company has the intent and ability to hold the securities to maturity.

9

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Investments in debt securities not classified as held-to-maturity and investments in marketable equity securities are classified as available-for-sale. Available-for-sale securities are carried at fair value, with unrealized gains and losses, net of income taxes, reported in “Accumulated other comprehensive income (loss)” in the condensed consolidated balance sheets. Realized gains and losses, determined on a specific identification method, are included in “Interest income” in the condensed consolidated statements of income.

The Company did not have any held-to-maturity securities as of September 30, 2012 or December 31, 2011.

Investments in available-for-sale securities at September 30, 2012 were as follows:

Available-for-sale securities	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(Dollars in millions)
Current:
Federal government securities	$	0.8	$	—	$	—		$	0.8
U.S. corporate bonds	3.4		—		—			3.4
Noncurrent:
Marketable equity securities	66.5		—		(40.0		)	26.5
Federal government securities	23.2		0.3		—			23.5
U.S. corporate bonds	12.9		0.2		—			13.1
Total	$	106.8	$	0.5	$	(40.0	)	$	67.3

Investments in available-for-sale securities at December 31, 2011 were as follows:

Available-for-sale securities	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
			(Dollars in millions)
Current:
Federal government securities	$	3.3	$	—	$	—		$	3.3
U.S. corporate bonds	3.9		—		—			3.9
Noncurrent:
Marketable equity securities	66.5		—		(9.5		)	57.0
Federal government securities	11.3		0.2		—			11.5
U.S. corporate bonds	7.7		0.1		—			7.8
Total	$	92.7	$	0.3	$	(9.5	)	$	83.5

Contractual maturities for available-for-sale investments in debt securities at September 30, 2012 were as shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

Contractual maturities for available-for-sale securities	Cost		Fair Value
	(Dollars in millions)
Due in one year or less	$	4.2	$	4.2
Due in one to five years	36.1		36.6
Total	$	40.3	$	40.8

10

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The Company’s investments in marketable equity securities consist of an investment in Winsway Coking Coal Holdings Limited (Winsway).

Proceeds from sales and maturities of securities amounted to zero and $9.8 million for the three and nine months ended September 30, 2012, respectively. The Company realized net gains of less than $0.1 million during the nine months ended September 30, 2012 associated with those sales and maturities.

In addition to the securities described above, the Company previously held an investment in debt securities related to the Company's pro-rata share of funding in the Newcastle Coal Infrastructure Group (NCIG), which was included in "Investments and other assets" in the condensed consolidated balance sheets. These debt securities were recorded at cost, which approximated fair value, and denominated in U.S. dollars. The Company sold $11.4 million and $29.2 million of debt securities related to NCIG during the three and nine months ended September 30, 2012, respectively. The Company recognized no loss on the sale during the three months ended September 30, 2012 and a loss of $0.2 million on the sale for the nine months ended September 30, 2012. There were no NCIG securities held at September 30, 2012.

At each reporting date, the Company performs separate evaluations of debt and equity securities to determine if any unrealized losses are other-than-temporary. After evaluating the length of time the market value has been less than cost and the financial condition and near-term prospects of Winsway, the Company deemed the impairment associated with its Winsway equity securities to be temporary as of September 30, 2012. The Company has the ability to hold the securities until recovery and has no current intention to divest the securities. Accordingly, the Company did not recognize other-than-temporary losses on its investments during the three or nine months ended September 30, 2012.

(6)     Inventories

Inventories consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Materials and supplies	$	157.0	$	123.7
Raw coal	162.2		108.1
Saleable coal	235.7		212.6
Total	$	554.9	$	444.4

(7)     Derivatives and Fair Value Measurements

Risk Management — Non-Coal Trading Activities

The Company is exposed to various types of risk in the normal course of business, including price risk on commodities utilized in the Company's mining operations, interest rate risk on long-term debt and foreign currency exchange rate risk for non-U.S. dollar expenditures. In most cases, commodity price risk (excluding coal trading activities) related to the sale of coal is mitigated through the use of long-term, fixed-price contracts, with a small percentage mitigated through the use of financial instruments. In order to manage our exposure related to price risk on certain commodities used in production, as well as for interest rate and foreign currency exchange rate risk, the Company utilizes derivative financial instruments. These risks are actively monitored in an effort to ensure compliance with the risk management policies of the Company.

Foreign Currency Hedges. The Company is exposed to foreign currency exchange rate risk, primarily on Australian dollar expenditures made in its Australian Mining segment. This risk is managed through the use of forward contracts and options that the Company designates as cash flow hedges, with the objective of reducing the variability of cash flows associated with forecasted foreign currency expenditures.

11

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Diesel Fuel and Explosives Hedges. The Company is exposed to commodity price risk associated with diesel fuel and explosives utilized in production in the U.S. and Australia. This risk is managed through the use of cost pass-through contracts and derivatives, primarily swaps. The Company generally designates the swap contracts as cash flow hedges, with the objective of reducing the variability of cash flows associated with forecasted diesel fuel and explosives purchases.

Interest Rate Swaps. The Company is exposed to interest rate risk on its fixed rate and variable rate long-term debt. From time to time, the Company manages the interest rate risk associated with the fair value of its fixed rate borrowings using fixed-to-floating interest rate swaps to effectively convert a portion of the underlying cash flows on the debt into variable rate cash flows. The Company designates these swaps as fair value hedges, with the objective of hedging against adverse changes in the fair value of the fixed rate debt that results from market interest rate changes. In addition, from time to time, interest rate risk associated with the Company’s variable rate borrowings is managed using floating-to-fixed interest rate swaps. The Company designates these swaps as cash flow hedges, with the objective of reducing the variability of cash flows associated with market interest rate changes. As of September 30, 2012, the Company had no interest rate swaps in place.

Notional Amounts and Fair Value. The following summarizes the Company’s foreign currency and commodity positions at September 30, 2012:

	Notional Amount by Year of Maturity
	Total		2012		2013		2014		2015
Foreign Currency
A$:US$ hedge contracts (A$ millions)	$	4,832.3	$	566.1	$	2,173.6	$	1,513.5	$	579.1
Commodity Contracts
Diesel fuel hedge contracts (million gallons)	215.4		27.0		102.1		63.6		22.7
U.S. explosives hedge contracts (million MMBtu)	4.6		0.8		2.6		1.2		—

	Account Classification by
	Cash Flow Hedge		Fair Value Hedge		Economic Hedge		Fair Value Asset (Liability)
							(Dollars in millions)
Foreign Currency
A$:US$ hedge contracts (A$ millions)	$	4,832.3	$	—	$	—	$	511.7
Commodity Contracts
Diesel fuel hedge contracts (million gallons)	215.4		—		—		30.9
U.S. explosives hedge contracts (million MMBtu)	4.6		—		—		(5.9		)

Hedge Ineffectiveness. The Company assesses, both at inception and at least quarterly thereafter, whether the derivatives used in hedging activities are highly effective at offsetting the changes in the anticipated cash flows of the hedged item. The effective portion of the change in the fair value is recorded in “Accumulated other comprehensive income (loss)” until the hedged transaction impacts reported earnings, at which time any gain or loss is reclassified to earnings. To the extent that periodic changes in the fair value of derivatives deemed highly effective exceeds such changes in the hedged item, the ineffective portion of the periodic non-cash changes are recorded in earnings in the period of the change. If the hedge ceases to qualify for hedge accounting, the Company prospectively recognizes changes in the fair value of the instrument in earnings in the period of the change.

A measure of ineffectiveness is inherent in hedging future diesel fuel purchases with derivative positions based on refined petroleum products as a result of location and product differences.

12

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The Company’s derivative positions for the hedging of future explosives purchases are based on natural gas, which is the primary price component of explosives. However, a small measure of ineffectiveness exists as the contractual purchase price includes manufacturing fees that are subject to periodic adjustments. In addition, other fees, such as transportation surcharges, can result in ineffectiveness, but have historically changed infrequently and comprise a small portion of the total explosives cost.

The Company’s derivative positions for the hedging of forecasted foreign currency expenditures contain a small measure of ineffectiveness due to timing differences between the hedge settlement and the purchase transaction, which could differ by less than a day and up to a maximum of 30 days.

The tables below show the classification and amounts of pre-tax gains and losses related to the Company’s non-coal trading hedges during the three and nine months ended September 30, 2012 and 2011:        

		Three Months Ended September 30, 2012
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Gain reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	49.6		$	11.2	$	2.2
Foreign currency forward and option contracts	Operating costs and expenses	—		169.2			82.0		—
Total		$	—	$	218.8		$	93.2	$	2.2
		Three Months Ended September 30, 2011
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Loss recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Loss reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	(51.2	)	$	8.5	$	(1.2	)
Foreign currency forward and option contracts:
— Operating costs	Operating costs and expenses	—		(269.1		)	92.2		—
— Capital expenditures	Depreciation, depletion and amortization	—		(0.5		)	—		—
Total		$	—	$	(320.8	)	$	100.7	$	(1.2	)

13

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

		Nine Months Ended September 30, 2012
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Loss reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	28.7		$	39.0	$	(2.3	)
Foreign currency forward and option contracts	Operating costs and expenses	—		297.5			276.6		—
Total		$	—	$	326.2		$	315.6	$	(2.3	)
		Nine Months Ended September 30, 2011
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain (loss) recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Gain reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	20.9		$	28.4	$	0.4
Foreign currency forward and option contracts:
— Operating costs	Operating costs and expenses	—		33.8			261.1		—
— Capital expenditures	Depreciation, depletion and amortization	—		(0.7		)	—		—
Total		$	—	$	54.0		$	289.5	$	0.4

Based on the net fair value of the Company’s non-coal trading positions held in “Accumulated other comprehensive income (loss)” at September 30, 2012, unrealized gains to be reclassified from comprehensive income to earnings over the next 12 months associated with the Company’s foreign currency and diesel fuel hedge programs are expected to be approximately $287 million and $30 million, respectively, while the unrealized losses to be realized under the explosives hedge program are expected to be approximately $4 million. As these unrealized gains are associated with derivative instruments that represent hedges of forecasted transactions, the amounts reclassified to earnings will partially offset the realized transactions, while the unrealized losses will add incremental expense to the unaudited condensed consolidated statements of income.

14

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The classification and amount of derivatives presented on a gross basis as of September 30, 2012 and December 31, 2011 were as follows:

	Fair Value as of September 30, 2012
Financial Instrument	Current Assets		Noncurrent Assets		Current Liabilities		Noncurrent Liabilities
	(Dollars in millions)
Commodity swap contracts	$	32.8	$	5.2	$	6.1	$	6.9
Foreign currency forward and option contracts	286.7		225.0		—		—
Total	$	319.5	$	230.2	$	6.1	$	6.9

	Fair Value as of December 31, 2011
Financial Instrument	Current Assets		Noncurrent Assets		Current Liabilities		Noncurrent Liabilities
	(Dollars in millions)
Commodity swap contracts	$	43.4	$	11.7	$	7.1	$	15.0
Foreign currency forward and option contracts	270.4		229.0		4.3		4.5
Total	$	313.8	$	240.7	$	11.4	$	19.5

After netting by counterparty where permitted, the fair values of the respective derivatives are reflected in “Other current assets,” “Investments and other assets,” “Accounts payable and accrued expenses” and “Other noncurrent liabilities” in the condensed consolidated balance sheets.

See Note 8 for information related to the Company’s coal trading activities.

Fair Value Measurements

The Company uses a three-level fair value hierarchy that categorizes assets and liabilities measured at fair value based on the observability of the inputs utilized in the valuation. These levels include: Level 1 - inputs are quoted prices in active markets for the identical assets or liabilities; Level 2 - inputs are other than quoted prices included in Level 1 that are directly or indirectly observable through market-corroborated inputs; and Level 3 - inputs are unobservable, or observable but cannot be market-corroborated, requiring the Company to make assumptions about pricing by market participants.

15

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Financial Instruments Measured on a Recurring Basis. The following tables set forth the hierarchy of the Company’s net financial asset positions for which fair value is measured on a recurring basis:

	September 30, 2012
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investments in debt and equity securities	$	67.3	$	—	$	—	$	67.3
Commodity swap contracts	—		25.0		—		25.0
Foreign currency forward and option contracts	—		511.7		—		511.7
Total net financial assets	$	67.3	$	536.7	$	—	$	604.0

	December 31, 2011
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investments in debt and equity securities	$	83.5	$	—	$	—	$	83.5
Commodity swap contracts	—		33.0		—		33.0
Foreign currency forward and option contracts	—		490.6		—		490.6
Total net financial assets	$	83.5	$	523.6	$	—	$	607.1

For Level 1 and 2 financial assets and liabilities, the Company utilizes both direct and indirect observable price quotes, including interest rate yield curves, exchange indices, broker quotes, published indices and other market quotes. Below is a summary of the Company’s valuation techniques for Level 1 and 2 financial assets and liabilities:

• Investments in debt and equity securities: valued based on quoted prices in active markets (Level 1).

• Commodity swap contracts — diesel fuel and explosives: valued based on a valuation that is corroborated by the use of market-based pricing (Level 2).

• Foreign currency forward and option contracts: valued utilizing inputs obtained in quoted public markets (Level 2).

The Company did not have any transfers between levels during the three or nine months ended September 30, 2012 or 2011 for its non-coal trading positions. The Company’s policy is to value transfers between levels using the beginning of period valuation.

Other Financial Instruments. The following methods and assumptions were used by the Company in estimating fair values for other financial instruments as of September 30, 2012 and December 31, 2011:

• Cash and cash equivalents, accounts receivable, including those within the Company’s accounts receivable securitization program, and accounts payable and accrued expenses have carrying values which approximate fair value due to the short maturity or the liquid nature of these instruments.

• The Company’s investment in debt securities related to its pro-rata share of funding in NCIG were included in “Investments and other assets” in the condensed consolidated balance sheets as of December 31, 2011, at which time the debt securities were recorded at cost, which approximated fair value. The Company disposed of its remaining investment in debt securities related to NCIG during the nine months ended September 30, 2012.

• Long-term debt fair value estimates are based on observed prices for securities with an active trading market when available (Level 2), and otherwise on estimated borrowing rates to discount the cash flows to their present value (Level 3). The carrying amounts of the 7.875% Senior Notes due December 2026 and the Convertible Junior Subordinated Debentures due 2066 (the Debentures) are net of the respective unamortized note discounts.

16

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The carrying amounts and estimated fair values of the Company’s debt are summarized as follows:

	September 30, 2012				December 31, 2011
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
	(Dollars in millions)
Long-term debt	$	6,363.1	$	6,393.0	$	6,657.5	$	6,922.7

Nonperformance and Credit Risk

The fair value of the Company’s non-coal trading derivative assets and liabilities reflects adjustments for nonperformance and credit risk. The Company manages its counterparty risk through established credit standards, diversification of counterparties, utilization of investment grade commercial banks and continuous monitoring of counterparty creditworthiness. To reduce its credit exposure for these hedging activities, the Company seeks to enter into netting agreements with counterparties that permit the Company to offset asset and liability positions with such counterparties in the event of default.

(8)     Coal Trading

The Company engages in direct and brokered trading of coal, ocean freight and fuel-related commodities in over-the-counter markets (coal trading), some of which is subsequently exchange-cleared and some of which is bilaterally settled. Except those for which the Company has elected to apply a normal purchases and normal sales exception, all derivative coal trading contracts are accounted for at fair value.

The Company's policy is to include instruments associated with coal trading transactions as a part of its trading book. Trading revenues from such transactions are recorded in “Other revenues” in the unaudited condensed consolidated statements of income and include realized and unrealized gains and losses on derivative instruments, including coal deliveries related to contracts accounted for under the normal purchases and normal sales exception. Therefore, the Company has elected the trading exemption surrounding disclosures related to its coal trading activities.

Trading revenues recognized during the three and nine months ended September 30, 2012 and 2011 were as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
Trading Revenues by Type of Instrument	2012			2011			2012		2011
	(Dollars in millions)
Commodity swaps and options	$	60.3		$	(0.6	)	$	110.9	$	(26.6	)
Physical commodity purchase/sale contracts	(20.0		)	29.6			21.9		60.9
Total trading revenues	$	40.3		$	29.0		$	132.8	$	34.3

Risk Management

Hedge Ineffectiveness. The Company assesses, both at inception and at least quarterly thereafter, whether the derivatives used in hedging activities are highly effective at offsetting the changes in the anticipated cash flows of the hedged item. The effective portion of the change in the fair value is recorded in “Accumulated other comprehensive income” until the hedged transaction impacts reported earnings, at which time gains and losses are also reclassified to earnings. To the extent that periodic changes in the fair value of a derivative exceeds the changes in the hedged item to which it has been designated, the ineffective portion is recorded in earnings in the period of the change. If the hedge ceases to qualify for hedge accounting, the Company prospectively recognizes the changes in fair value of the instrument in earnings in the period of the change.

17

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In some instances, the Company has designated an existing coal trading derivative as a hedge and, thus, the derivative has a non-zero fair value at hedge inception. The “off-market” nature of these derivatives, which is best described as an embedded financing element within the derivative, is a source of ineffectiveness. In other instances, the Company uses a coal trading derivative that settles at a different time, has different quality specifications or has a different location basis than the occurrence of the cash flow being hedged. These collectively yield ineffectiveness to the extent that the derivative hedge contract does not exactly offset changes in the fair value or expected cash flows of the hedged item.

Forecasted Transactions No Longer Probable. During the nine months ended September 30, 2012, the Company reclassified net gains of $7.1 million out of “Accumulated other comprehensive income (loss)” to earnings as the underlying forecasted transactions were deemed no longer probable of occurring. Approximately $4.5 million of this amount relates to disruptions to forecasted transactions due to the bankruptcy declaration of a counterparty to certain of our physical purchase contracts during the third quarter of 2012.

Fair Value Measurements

The fair value of assets and liabilities from coal trading activities is set forth below:

	September 30, 2012						December 31, 2011
	Gross Basis			Net Basis			Gross Basis			Net Basis
	(Dollars in millions)
Assets from coal trading activities	$	444.8		$	56.2		$	170.4		$	44.6
Liabilities from coal trading activities	(216.6		)	(19.9		)	(84.0		)	(10.3		)
Subtotal	228.2			36.3			86.4			34.3
Net margin held (1)	(191.9		)	—			(52.1		)	—
Net value of coal trading positions	$	36.3		$	36.3		$	34.3		$	34.3

⁽¹⁾  Represents margin held from exchanges of $191.9 million and $52.1 million at September 30, 2012 and December 31, 2011, respectively. Approximately $100 million and $23 million of the margin held at September 30, 2012 and December 31, 2011, respectively, related to cash flow hedges.

The Company’s trading assets and liabilities are generally comprised of forward contracts, financial swaps and margin. The gross fair value of coal trading positions designated as cash flow hedges of forecasted sales was an asset of $185.1 million and $22.4 million as of September 30, 2012 and December 31, 2011, respectively. The increase in the fair value of coal trading positions designated as cash flow hedges of forecasted sales was predominantly driven by a decrease in the associated price levels in international thermal coal markets during the period.

18

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following tables set forth the hierarchy of the Company’s net financial asset (liability) coal trading positions for which fair value is measured on a recurring basis:

	September 30, 2012
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Commodity swaps and options	$	2.0	$	31.9	$	—	$	33.9
Physical commodity purchase/sale contracts	—		1.5		0.9		2.4
Total net financial assets	$	2.0	$	33.4	$	0.9	$	36.3

	December 31, 2011
	Level 1		Level 2			Level 3		Total
	(Dollars in millions)
Commodity swaps and options	$	21.2	$	(1.9	)	$	—	$	19.3
Physical commodity purchase/sale contracts	—		6.3			8.7		15.0
Total net financial assets	$	21.2	$	4.4		$	8.7	$	34.3

For Level 1 and 2 financial assets and liabilities, the Company utilizes both direct and indirect observable price quotes, including U.S. interest rate curves, LIBOR yield curves, Chicago Mercantile Exchange (CME), Intercontinental Exchange indices (ICE), NOS Clearing ASA, LCH.Clearnet (formerly known as the London Clearing House), Singapore Exchange (SGX), broker quotes, published indices and other market quotes. Below is a summary of the Company’s valuation techniques for Level 1 and 2 financial assets and liabilities:

• Commodity swaps and options: generally valued based on unadjusted quoted prices in active markets (Level 1) or a valuation that is corroborated by the use of market-based pricing (Level 2).

• Physical commodity purchase/sale contracts: purchases and sales at locations with significant market activity corroborated by market-based information (Level 2).

Physical commodity purchase/sale contracts transacted in less liquid markets or contracts, such as long-term arrangements with limited price availability, are classified in Level 3. Indicators of less liquid markets are those with periods of low trade activity or wide pricing spreads between broker quotes.

The Company's risk management function, which is independent of the Company's commercial trading function, is responsible for valuation policies and procedures, with oversight from executive management. Generally, the Company's Level 3 instruments or contracts are valued using bid/ask price quotations and other market assessments obtained from multiple, independent third-party brokers or other transactional data incorporated into internally-generated discounted cash flow models. While the Company does not anticipate any decrease in the number of third-party brokers or market liquidity, the occurrence of such events could erode the quality of market information and therefore the valuation of its market positions. The Company's valuation techniques include basis adjustments to the foregoing price inputs for quality, such as heat rate, sulfur content and ash content; location differentials, expressed as port and freight costs, and credit and nonperformance risk. The Company's risk management function independently validates the Company's valuation inputs, including unobservable inputs, with third-party information and settlement prices from other sources where available. A daily process is performed to analyze market price changes and changes to the portfolio. Further periodic validation occurs at the time contracts are settled with the counterparty. These valuation techniques have been consistently applied in all periods presented, and the Company believes it has obtained the most accurate information available for the types of derivative contracts held.

19

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following table summarizes the quantitative unobservable inputs utilized by the Company's internally-developed valuation models for physical commodity purchase/sale contracts classified as Level 3 as of September 30, 2012:

	Range				Weighted
	Low		High		Average
Quality adjustments	2	%	22	%	14	%
Location differentials	6	%	40	%	25	%
Non-performance adjustments	4	%	4	%	4	%

Significant increases or decreases in the inputs in isolation could result in a significantly higher or lower fair value measurement. The unobservable inputs do not have a direct interrelationship; therefore, a change in one unobservable input would not necessarily correspond with a change in another unobservable input.

The following table summarizes the changes in the Company’s recurring Level 3 net financial assets:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Beginning of period	$	2.9		$	9.9		$	8.7		$	18.6
Total net gains (losses) realized/unrealized:
Included in earnings	2.4			(1.4		)	12.8			10.7
Settlements	(4.4		)	(1.3		)	(20.6		)	(3.1		)
Transfers out	—			1.0			—			(18.0		)
End of period	$	0.9		$	8.2		$	0.9		$	8.2

The following table summarizes the changes in net unrealized gains relating to Level 3 net financial assets held both as of the beginning and the end of the period:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
	(Dollars in millions)
Changes in net unrealized gains (1)	$	0.2	$	(1.1	)	$	(3.5	)	$	8.7

⁽¹⁾  Within the unaudited condensed consolidated statements of income and unaudited condensed consolidated statements of comprehensive income for the periods presented, unrealized gains and losses from Level 3 items are combined with unrealized gains and losses on positions classified in Level 1 or 2, as well as other positions that have been realized during the applicable periods.

The Company did not have any significant transfers in its coal trading positions between Level 1 and Level 2 during the nine months ended September 30, 2012 or 2011. There were no transfers in or out of Level 3 during the three and nine months ended September 30, 2012. During the three and nine months ended September 30, 2011, certain of the Company's physical commodity purchase/sale contracts were transferred from Level 3 to Level 2 as the settlement dates entered a more liquid market. The Company’s policy is to value transfers between levels using the beginning of period valuation.

Based on the net fair value of the Company’s coal trading positions held in “Accumulated other comprehensive income (loss)” at September 30, 2012, unrealized gains to be reclassified from comprehensive income to earnings over the next 12 months are expected to be approximately $137 million. As these unrealized gains are associated with derivative instruments that represent hedges of forecasted transactions, the amounts reclassified to earnings may partially offset the realized transactions in the unaudited condensed consolidated statements of income.

20

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

As of September 30, 2012, the timing of the estimated future realization of the value of the Company’s trading portfolio was as follows:

Year of	Percentage of
Expiration	Portfolio Total
2012	28	%
2013	61	%
2014	10	%
2015	1	%
	100	%

Nonperformance and Credit Risk. The fair value of the Company’s coal derivative assets and liabilities reflects adjustments for nonperformance and credit risk. The Company’s exposure is substantially with electric utilities, steel producers, energy marketers and energy producers. The Company’s policy is to independently evaluate each customer’s creditworthiness prior to entering into transactions and to regularly monitor the credit extended. If the Company engages in a transaction with a counterparty that does not meet its credit standards, the Company seeks to protect its position by requiring the counterparty to provide an appropriate credit enhancement. Also, when appropriate (as determined by its credit management function), the Company has taken steps to reduce its exposure to customers or counterparties whose credit has deteriorated and who may pose a higher risk of failure to perform under their contractual obligations. These steps include obtaining letters of credit or cash collateral (margin), requiring prepayments for shipments or the creation of customer trust accounts held for the Company’s benefit to serve as collateral in the event of a failure to pay or perform. To reduce its credit exposure related to trading and brokerage activities, the Company seeks to enter into netting agreements with counterparties that permit the Company to offset asset and liability positions with such counterparties and, to the extent required, will post or receive margin amounts associated with exchange-cleared positions.

At September 30, 2012, 88% of the Company’s credit exposure related to coal trading activities was with investment grade counterparties while 9% was with non-investment grade counterparties and 3% was with counterparties that are not rated.

Performance Assurances and Collateral

Certain of the Company’s derivative trading instruments require the parties to provide additional performance assurances whenever a material adverse event jeopardizes one party’s ability to perform under the instrument. If the Company was to sustain a material adverse event (using commercially reasonable standards), the counterparties could request collateralization on derivative trading instruments in net liability positions which, based on an aggregate fair value at September 30, 2012 and December 31, 2011, would have amounted to collateral postings to counterparties of approximately $11 million as of both dates. As of September 30, 2012 and December 31, 2011, no collateral was posted to counterparties for such positions.

Certain of the Company’s other derivative trading instruments require the parties to provide additional performance assurances whenever a credit downgrade occurs below a certain level as specified in each underlying contract. The terms of such derivative trading instruments typically require additional collateralization, which is commensurate with the severity of the credit downgrade. If a credit downgrade were to have occurred below contractually specified levels, the Company’s additional collateral requirement owed to its counterparties would have been less than $1 million at September 30, 2012 and December 31, 2011 based on the aggregate fair value of all derivative trading instruments with such features that were in a net liability position. No affiliated margin was posted for these transactions as of September 30, 2012 and December 31, 2011.

The Company is required to post collateral on positions that are in a net liability position with an exchange and is entitled to receive collateral on positions that are in a net asset position. This collateral is known as variation margin. At September 30, 2012 and December 31, 2011, the Company was in a net asset position of $191.9 million and $52.1 million, respectively (reflected in “Assets from coal trading activities, net”).

21

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

In addition, the Company is required by an exchange to post certain collateral, known as initial margin, which represents an estimate of potential future adverse price movements across the Company’s portfolio under normal market conditions. As of September 30, 2012 and December 31, 2011, the Company had posted initial margin of $26.6 million and $34.0 million, respectively (reflected in “Other current assets”). In addition, the Company had posted $1.7 million of margin in excess of the exchange-required variation (discussed above) and initial margin as of September 30, 2012 (also reflected in “Other current assets”).

MF Global UK Limited

In October 2011, MF Global UK Limited (MF Global UK), a United Kingdom (U.K.) based broker-dealer, was placed into the U.K.'s administration process (a process similar to bankruptcy proceedings in the U.S.) by the Financial Services Authority following the Chapter 11 bankruptcy filing of its U.S. parent, MF Global Holdings Ltd. The Company had used MF Global UK to broker certain of its coal trading transactions. The interruption of the Company's trading operations was limited as the Company opened new accounts with different brokerage firms and transferred its open trading positions formerly held with MF Global UK to those new accounts. While the open trading positions were transferred from MF Global UK successfully, the related margin posted by the Company was retained by MF Global UK pending resolution of the Company's claims with the special administrators.

Through August 2012, the Company had received $20.0 million of the initial outstanding amount of $52.1 million that was held with MF Global UK when it was placed into the U.K.'s administration process. In September 2012, the Company sold its remaining claim with the special administrators to a third party on a discounted basis for $28.0 million. As a result, the Company recognized a loss of $4.1 million on the sale of its claim during the three and nine months ended September 30, 2012.

(9)     Financing Receivables

The Company had total financing receivables of $385.1 million and $376.1 million at September 30, 2012 and December 31, 2011, respectively, which consisted of the following:

Balance Sheet Classification	September 30, 2012		December 31, 2011
	(Dollars in millions)
Accounts receivable, net	$	9.8	$	51.3
Other current assets	—		65.0
Investments and other assets	375.3		259.8
Total financing receivables	$	385.1	$	376.1

The Company periodically assesses the collectability of accounts and loans receivable by considering factors such as specific evaluation of collectability, historical collection experience, the age of the receivable and other available evidence. Below is a description of the Company's financing receivables at September 30, 2012.

Codrilla Mine Project. In 2011, a wholly owned subsidiary of PEA-PCI, then Macarthur Coal Limited, completed the sale of its 85% interest in the Codrilla Mine Project to participants of the Coppabella Moorvale Joint Venture (CMJV) where PEA-PCI sold down its interest in the Codrilla project to the CMJV (Codrilla sell down) so that, following completion of the sale, ownership of the Codrilla Mine Project reflected the existing ownership of the Coppabella and Moorvale mines with PEA-PCI retaining a 73.3% ownership. Prior to the acquisition of PEA-PCI by the Company, consideration of $15.0 million Australian dollars was received by PEA-PCI upon completion of the Codrilla sell down, representing 20% of the agreed price. Two installments, for which the Company holds non-interest-bearing receivables, are due upon the completion of certain milestones. The first installment, with 40% due on the granting of the related mining lease, was received during the three months ended September 30, 2012. The final 40% is due upon the mine's first coal shipment. At December 31, 2011, the first installment of $34.2 million was included in "Accounts receivable, net" in the condensed consolidated balance sheet which was collected from CMJV participants in the third quarter 2012 when the mining lease was granted and is reflected in "Proceeds from disposal of assets" in the condensed consolidated statements of cash flows for the nine months ended September 30, 2012. There are currently no indications of impairment on the remaining installment and the Company expects to receive full payment upon the mine's first shipment. The remaining balance associated with these receivables is recorded in "Investments and other assets" which was $36.2 million and $35.6 million at September 30, 2012 and December 31, 2011, respectively, in the condensed consolidated balance sheets.

22

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Middlemount Mine. The Company periodically makes loans to the Middlemount Mine joint venture (Middlemount) for the purposes of funding capital expenditures and working capital requirements, in line with the related shareholders’ agreement. Middlemount intends to pay down the loans as excess cash is generated as required by the shareholders’ agreement. The loans bear interest at a rate equal to the monthly average 30-day Australian Bank Bill Swap Reference Rate plus 3.5%. There are currently no indications of impairment and the Company expects to receive full payment of amounts due. "Other current assets" included $65.0 million at December 31, 2011, which was reclassified to "Investments and other assets" during the nine months ended September 30, 2012. "Investments and other assets" included $339.1 million and $224.2 million at September 30, 2012 and December 31, 2011, respectively, in the condensed consolidated balance sheets related to these loans.

Other Financing Receivables. From time to time, the Company may enter into transactions resulting in accounts or notes receivable held by the Company. These notes are generally short term in nature with positive historical collection experience and do not represent a material credit risk to the Company.

(10)  Income Taxes

The following is a reconciliation of the expected statutory federal income tax provision to the Company’s actual income tax provision:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Expected income tax provision at federal statutory rate	$	60.2		$	115.6		$	212.1		$	360.6
Excess depletion	(16.7		)	(17.0		)	(58.8		)	(53.0		)
Foreign earnings provision differential	(17.5		)	(23.8		)	(72.0		)	(74.3		)
Remeasurement of foreign income tax accounts	13.6			(38.7		)	8.7			(16.9		)
State income taxes, net of U.S. federal tax benefit	4.4			2.9			15.5			9.2
General business tax credits	(13.5		)	(4.4		)	(47.6		)	(12.7		)
Changes in valuation allowance	4.1			2.5			(30.9		)	7.0
Changes in tax reserves	8.6			6.0			21.9			10.8
Other, net	6.1			(3.9		)	36.6			8.1
Total provision	$	49.3		$	39.2		$	85.5		$	238.8

The Company reduced its prior years' net unrecognized tax benefits by $13.5 million during the nine months ended September 30, 2012. The reduction is based upon the successful completion of the 2007-2008 Internal Revenue Service (IRS) audit and the effective settlement of the 1999-2006 tax years due to favorable resolution of the 2006 IRS appeals decision, offset by the reassessment of current and prior year foreign tax positions associated with certain intercompany financing transactions due to a formal position paper received from the Australian Tax Office (ATO) challenging those positions. The Company also recognized additional interest and penalties related to unrecognized tax benefits of $2.2 million and $19.4 million for the three and nine months ended September 30, 2012, respectively.

On March 29, 2012, Australia passed legislation creating a minerals resource rent tax (the MRRT) effective from July 1, 2012. The MRRT is a profits-based tax of the Company's existing and future Australian coal projects at an effective tax rate of 22.5%. Under the MRRT, taxpayers are able to elect a market value asset starting base for existing projects which allows for the fair market value of the tenements to be deducted over the life of the mine as an allowance against MRRT. The market value allowance, and ultimately any future benefit, is subject to numerous uncertainties including review and approval by the ATO, realization only after other MRRT allowances provided under the law and estimates of long-term pricing and cost data necessary to estimate the future benefit and any MRRT liability. The Company evaluated the provisions of the new tax and assessed recoverability of deferred tax assets and the valuation of liabilities associated with the implementation of the MRRT. For the nine months ended September 30, 2012, the Company believes there is no net deferred tax asset to be recorded for the market value starting base.

23

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

During the second quarter of 2012, the Company realized a net tax benefit of $59.7 million due to an acquisition restructuring of PEA-PCI whereby certain PEA-PCI tax entities joined the Peabody legacy Australian tax group. The benefit resulted from a $14.6 million reduction in deferred tax liabilities and a $45.1 million net reduction in valuation allowance on certain deferred tax assets and net operating losses due to the tax basis reset of PEA-PCI assets required upon joining the Company's Australian consolidated tax group.

(11) Debt 

The Company’s total indebtedness as of September 30, 2012 and December 31, 2011 consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Term Loan	$	450.0	$	468.8
2011 Term Loan Facility	975.0		1,000.0
7.375% Senior Notes due November 2016	650.0		650.0
6.00% Senior Notes due November 2018	1,518.8		1,600.0
6.50% Senior Notes due September 2020	650.0		650.0
6.25% Senior Notes due November 2021	1,339.6		1,500.0
7.875% Senior Notes due November 2026	247.4		247.3
Convertible Junior Subordinated Debentures due December 2066	376.8		375.2
Capital lease obligations	111.6		122.8
Other	43.9		43.4
Total Debt	$	6,363.1	$	6,657.5

6.00% and 6.25% Senior Notes

During the second quarter of 2012, the Company repurchased $81.2 million and $160.4 million in aggregate principal amount of its 6.00% and 6.25% Senior Notes due 2018 and 2021 (the Notes), respectively, with existing cash on hand. The Company recognized a loss on debt extinguishment of $2.8 million associated with these repurchases, which was comprised of $3.4 million of expense related to the write-off of deferred financing costs and a gain of $0.6 million as the repurchases were made below par value. The loss is classified in "Interest expense" in the unaudited condensed consolidated statement of operations for the nine months ended September 30, 2012.

During the third quarter of 2012, the Company commenced an offer to exchange any and all of the Notes outstanding for substantially identical freely tradable debt securities registered under the Securities Act of 1933. The exchange offer was completed in October 2012 and did not affect the Company's indebtedness outstanding.

Other Long-Term Debt

Other than the foregoing, there were no significant changes to the Company's long-term debt subsequent to December 31, 2011. Information regarding the Company's debt is outlined in Note 11 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2011.

24

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(12) Pension and Postretirement Benefit Costs

Net periodic pension costs included the following components:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Service cost for benefits earned	$	0.5		$	0.4		$	1.5		$	1.3
Interest cost on projected benefit obligation	11.7			12.4			35.1			37.3
Expected return on plan assets	(15.9		)	(16.1		)	(47.8		)	(48.3		)
Amortization of prior service cost	0.3			0.3			0.8			0.8
Amortization of actuarial loss	12.1			7.5			36.4			22.5
Net periodic pension costs	$	8.7		$	4.5		$	26.0		$	13.6

Annual contributions to the qualified plans are made in accordance with minimum funding standards and the Company's agreement with the Pension Benefit Guaranty Corporation (PBGC). Funding decisions also consider certain funded status thresholds defined by the Pension Protection Act of 2006 (generally 80%). As of January 1, 2012, the Company's qualified plans were above the Pension Protection Act thresholds and will therefore avoid benefit restrictions and at-risk penalties for 2012. On July 6, 2012, the Moving Ahead for Progress in the 21st Century Act (MAP-21), a highway reauthorization and student loan bill that includes both pension funding stabilization provisions and PBGC premium increases, was signed into law. The pension funding stabilization provisions temporarily increased the interest rates used to determine pension liabilities for purposes of minimum funding requirements. MAP-21 is not expected to change the Company's total required cash contributions over the long term, but is expected to reduce the Company's required cash contributions through 2015 relative to prior law if current interest rate levels persist. Based upon revised minimum funding requirements in accordance with MAP-21, the Company has no further funding requirements to its qualified plans for the remainder of 2012. Prior to the enactment of MAP-21, the Company intended to contribute $5.0 million in 2012 to meet minimum contribution requirements for its qualified plans. The Company expects to make contributions to its non-qualified plans during 2012 totaling less than $2.0 million.

Net periodic postretirement benefit costs included the following components:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(Dollars in millions)
Service cost for benefits earned	$	3.6	$	3.5	$	10.9	$	9.8
Interest cost on accumulated postretirement benefit obligation	13.7		14.5		41.2		43.4
Amortization of prior service cost	0.7		0.8		1.7		1.6
Amortization of actuarial loss	8.1		6.7		24.5		20.2
Net periodic postretirement benefit costs	$	26.1	$	25.5	$	78.3	$	75.0

25

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(13) Other Commercial Events

Prairie State Energy Campus (Prairie State)

A subsidiary of the Company owns a 5.06% undivided interest in Prairie State, a 1,600 megawatt coal-fueled electricity generation project under construction in Washington, St. Clair and Randolph counties in Illinois. On June 6, 2012, the first of two 800 megawatt electricity generation units (Unit 1) commenced commercial operations. Accordingly, the Company reclassified $156.6 million from "Investments and other assets" to operating assets and liabilities in the condensed consolidated balance sheet as follows (in millions):

Inventories	$	3.6
Property, plant, equipment and mine development	153.8
Accounts payable and accrued expenses	(0.8		)
Total, net	$	156.6

Subsequent to June 6, 2012, the 5.06% share of the results of operations of Unit 1 have been included in the Company's condensed consolidated statements of income.

Included in "Investments and other assets" in the condensed consolidated balance sheet as of September 30, 2012 are costs of $88.1 million related to the Company's investment in the second of two 800 megawatt electricity generation units (Unit 2).

In June 2011, the Company recognized income associated with the receipt of a $14.6 million project development fee associated with Prairie State, classified in "Other revenues" in the unaudited condensed consolidated statement of operations for the nine months ended September 30, 2011.

Coal Reserves

In June 2011, the Company exchanged coal reserves in Kentucky and coal reserves and surface lands in Illinois for coal reserves in West Virginia in a nonmonetary exchange with a third party. Based on the fair value of the coal reserves received, the Company recognized a gain of $23.5 million on the exchange. Fair value was determined using a discounted cash flow model that included assumptions surrounding future coal sales prices, operating costs and discount rate. Based on the non-cash nature of the transaction, there was no impact to the investing section of the Company's unaudited condensed consolidated statement of cash flows.

(14) Earnings per Share (EPS)

Basic and diluted EPS are computed using the two-class method, which is an earnings allocation that determines EPS for each class of common stock and participating securities according to dividends declared and participation rights in undistributed earnings. The Company’s restricted stock awards are considered participating securities because holders are entitled to receive non-forfeitable dividends during the vesting term. Diluted EPS includes securities that could potentially dilute basic EPS during a reporting period, for which the Company includes the Debentures and share-based compensation awards.

A conversion of the Debentures may result in payment for any conversion value in excess of the principal amount of the Debentures in the Company’s common stock. For diluted EPS purposes, potential common stock is calculated based on whether the market price of the Company’s common stock at the end of each reporting period is in excess of the conversion price of the Debentures. For a full discussion of the conditions under which the Debentures may be converted, the conversion rate to common stock and the conversion price, see Note 11 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

26

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

For all but the performance units, the potentially dilutive impact of the Company’s share-based compensation awards is determined using the treasury stock method. Under the treasury stock method, awards are treated as if they had been exercised with any proceeds used to repurchase common stock at the average market price during the period. Any incremental difference between the assumed number of shares issued and purchased is included in the diluted share computation. For the Company’s performance units, their contingent features result in an assessment for any potentially dilutive common stock by using the end of the reporting period as if it were the end of the contingency period for all units granted. For a full discussion of the Company’s share-based compensation awards, see Note 17 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

The computation of diluted EPS excludes anti-dilutive shares of approximately 0.1 million for each of the periods presented. These anti-dilutive shares were due to certain share-based compensation awards calculated under the treasury stock method. Anti-dilution generally occurs where the exercise prices are higher than the average market value of the Company’s stock price during the applicable period.

27

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The following illustrates the earnings allocation method utilized in the calculation of basic and diluted EPS:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(In millions, except per share amounts)
EPS numerator:
Income from continuing operations, net of income taxes	$	122.9		$	291.2		$	520.4		$	791.3
Less: Net (loss) income attributable to noncontrolling interests	(1.3		)	7.4			7.4			17.0
Income from continuing operations attributable to common stockholders, before allocation of earnings to participating securities	124.2			283.8			513.0			774.3
Less: Earnings from continuing operations allocated to participating    securities	0.8			1.6			3.8			4.4
Income from continuing operations attributable to common    stockholders, after allocation of earnings to participating    securities (1)	123.4			282.2			509.2			769.9
Loss from discontinued operations, net of income taxes	(81.3		)	(9.7		)	(92.7		)	(38.9		)
Less: Loss from discontinued operations allocated to participating    securities	$	(0.6	)	$	—		$	(0.8	)	$	(0.2	)
Loss from discontinued operations attributable to common     stockholders, after allocation of earnings to participating    securities (1)	$	(80.7	)	$	(9.7	)	$	(91.9	)	$	(38.7	)
Net income attributable to common stockholders, after    allocation of earnings to participating securities (1)	$	42.7		$	272.5		$	417.3		$	731.2
EPS denominator:
Weighted average shares outstanding — basic	266.2			269.2			268.5			269.0
Impact of dilutive securities	0.6			1.4			0.7			1.5
Weighted average shares outstanding — diluted	266.8			270.6			269.2			270.5
Basic EPS attributable to common stockholders:
Income from continuing operations	$	0.46		$	1.05		$	1.89		$	2.86
Loss from discontinued operations	(0.30		)	(0.04		)	(0.34		)	(0.14		)
Net income	$	0.16		$	1.01		$	1.55		$	2.72
Diluted EPS attributable to common stockholders:
Income from continuing operations	$	0.46		$	1.04		$	1.89		$	2.84
Loss from discontinued operations	(0.30		)	(0.04		)	(0.34		)	(0.13		)
Net income	$	0.16		$	1.00		$	1.55		$	2.71

⁽¹⁾  The reallocation adjustment for participating securities to arrive at the numerator used to calculate diluted EPS was less than $0.1 million for the periods presented.

(15) Financial Instruments and Guarantees with Off-Balance Sheet Risk

In the normal course of business, the Company is a party to guarantees and financial instruments with off-balance-sheet risk, which are not reflected in the accompanying condensed consolidated balance sheets. Such financial instruments are valued based on the amount of exposure under the instrument and the likelihood of required performance. In the Company’s past experience, virtually no claims have been made against these financial instruments. Management does not expect any material losses to result from these guarantees or off-balance-sheet instruments.

28

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Financial Instruments with Off-Balance Sheet Risk

As of September 30, 2012, the Company had the following financial instruments with off-balance sheet risk:

	Reclamation Obligations		Lease Obligations		Workers’ Compensation Obligations		Other(1)		Total
	(Dollars in millions)
Self bonding	$	1,221.9	$	—	$	—	$	—	$	1,221.9
Surety bonds	372.1		105.3		11.8		9.8		499.0
Bank guarantees	225.9		—		—		204.7		430.6
Letters of credit	—		—		62.4		81.2		143.6
	$	1,819.9	$	105.3	$	74.2	$	295.7	$	2,295.1

⁽¹⁾  Other includes the $79.7 million in letters of credit described below and an additional $216.0 million in bank guarantees, surety bonds and letters of credit related to collateral for surety companies, road maintenance, performance guarantees and other operations.

The Company owns a 37.5% interest in Dominion Terminal Associates, a partnership that operates a coal export terminal in Newport News, Virginia under a 30-year lease that permits the partnership to purchase the terminal at the end of the lease term for a nominal amount. The partners have severally (but not jointly) agreed to make payments under various agreements which in the aggregate provide the partnership with sufficient funds to pay rents and to cover the principal and interest payments on the floating-rate industrial revenue bonds issued by the Peninsula Ports Authority, and which are supported by letters of credit from a commercial bank. As of September 30, 2012, the Company’s maximum reimbursement obligation to the commercial bank was in turn supported by four letters of credit totaling $42.7 million.

The Company is party to an agreement with the PBGC and TXU Europe Limited, an affiliate of the Company’s former parent corporation, under which the Company is required to make special contributions to two of the Company’s defined benefit pension plans and to maintain a $37.0 million letter of credit in favor of the PBGC. If the Company or the PBGC gives notice of an intent to terminate one or more of the covered pension plans in which liabilities are not fully funded, or if the Company fails to maintain the letter of credit, the PBGC may draw down on the letter of credit and use the proceeds to satisfy liabilities under the Employee Retirement Income Security Act of 1974, as amended. The PBGC, however, is required to first apply amounts received from a $110.0 million guarantee in place from TXU Europe Limited in favor of the PBGC before it draws on the Company’s letter of credit. On November 19, 2002, TXU Europe Limited was placed under the administration process in the U.K. (a process similar to bankruptcy proceedings in the U.S.) and continues under this process as of September 30, 2012. As a result of these proceedings, TXU Europe Limited may be liquidated or otherwise reorganized in such a way as to relieve it of its obligations under its guarantee.

Accounts Receivable Securitization

The Company has an accounts receivable securitization program (securitization program) with a maximum capacity of $275.0 million through its wholly owned, bankruptcy-remote subsidiary (Seller). At September 30, 2012, the Company had $153.1 million remaining capacity available under the securitization program, net of outstanding letters of credit and amounts drawn. Under the securitization program, the Company contributes trade receivables of most of the Company's U.S. subsidiaries on a revolving basis to the Seller, which then sells the receivables in their entirety to a consortium of unaffiliated asset-backed commercial paper conduits (the Conduits). After the sale, the Company, as servicer of the assets, collects the receivables on behalf of the Conduits for a nominal servicing fee. The Company utilizes proceeds from the sale of its accounts receivable as an alternative to short-term borrowings under the revolving credit facility portion of the Company’s Credit Facility, effectively managing its overall borrowing costs and providing an additional source of working capital. The securitization program extends to May 2013, while the letter of credit commitment that supports the commercial paper facility underlying the securitization program must be renewed annually.

The Seller is a separate legal entity whose assets are available first and foremost to satisfy the claims of its creditors. Of the receivables sold to the Conduits, a portion of the amount due to the Seller is deferred until the ultimate collection of the underlying receivables. During the nine months ended September 30, 2012, the Company received total consideration of $3,210.2 million related to accounts receivable sold under the securitization program, including $1,973.7 million of cash up front from the sale of

29

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

the receivables, an additional $874.6 million of cash upon the collection of the underlying receivables and $362.0 million that had not been collected at September 30, 2012 and was recorded at carrying value, which approximates fair value. The reduction in accounts receivable as a result of securitization activity with the Conduits was $100.0 million and $150.0 million at September 30, 2012 and December 31, 2011, respectively.

The securitization activity has been reflected in the unaudited condensed consolidated statements of cash flows as an operating activity because both the cash received from the Conduits upon sale of the receivables as well as the cash received from the Conduits upon the ultimate collection of the receivables are not subject to significantly different risks given the short-term nature of the Company’s trade receivables. The Company recorded expense associated with securitization transactions of $0.5 million and $0.4 million for the three months ended September 30, 2012 and 2011, respectively, and $1.4 million and $1.5 million for the nine months ended September 30, 2012 and 2011, respectively.

Patriot Bankruptcy

On October 31, 2007, the Company spun-off companies that constituted portions of its former Eastern U.S. Mining operations business segment to form Patriot Coal Corporation (Patriot). The spin-off included eight company-operated mines, two majority-owned joint venture mines and numerous contractor-operated mines serviced by eight coal preparation facilities, along with 1.2 billion tons of proven and probable coal reserves. On July 9, 2012, Patriot and certain of its wholly owned subsidiaries filed voluntary petitions for reorganization under Chapter 11 of the U.S. Code in the U.S. Bankruptcy Court for the Southern District of New York.

The Company believes that its only material exposure to the bankruptcy of Patriot relates to up to $150 million in possible federal and state black lung occupational disease liabilities. As Patriot noted in its Annual Report on Form 10-K/A for the year ended December 31, 2011, it has posted $15 million in collateral with the U.S. Department of Labor (DOL) in exchange for the right to self-insure its liabilities under the Federal Coal Mine Health and Safety Act of 1969 (Black Lung Act). If Patriot is unable to meet its black lung liability obligations, the Company believes that the DOL will first look to this collateral for payment. The Black Lung Act allows the DOL to seek recovery from other potentially liable operators as well. The Company may be considered a potentially liable operator for purposes of the Black Lung Act with respect to the black lung liabilities of Patriot at the time of the spin-off.

The Company also has a small number of commercial arrangements with Patriot and believes its potential exposure under these agreements will not have a material adverse effect on its consolidated results of operations, financial condition or cash flows.

Other

The Company is the lessee under numerous equipment and property leases. It is common in such commercial lease transactions for the Company, as the lessee, to agree to indemnify the lessor for the value of the property or equipment leased, should the property be damaged or lost during the course of the Company’s operations. The Company expects that losses with respect to leased property, if any, would be covered by insurance (subject to deductibles). The Company and certain of its subsidiaries have guaranteed other subsidiaries’ performance under various lease obligations. Aside from indemnification of the lessor for the value of the property leased, the Company’s maximum potential obligations under its leases are equal to the respective future minimum lease payments, and the Company assumes that no amounts could be recovered from third parties.

The Company has provided financial guarantees under certain long-term debt agreements entered into by its subsidiaries and substantially all of the Company’s U.S. subsidiaries provide financial guarantees under long-term debt agreements entered into by the Company. The maximum amounts payable under the Company’s debt agreements are equal to the respective principal and interest payments.

(16) Commitments and Contingencies

Commitments

Unconditional Purchase Obligations

30

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

As of September 30, 2012, purchase commitments for capital expenditures were $728.3 million, all of which is obligated within the next three years and $688.5 million is obligated in the next 12 months.

Federal Coal Leases

In the second quarter of 2012, the Company was named by the U.S. Department of the Interior, Bureau of Land Management (BLM) as the winning bidder for control of approximately 1.1 billion tons of federal coal reserves adjacent to its North Antelope Rochelle Mine in the Southern Powder River Basin of Wyoming, with a weighted average bid price of approximately $1.10 per mineable ton. Consequently, the Company made aggregate payments of $247.9 million in the nine months ended September 30, 2012 pursuant to the two associated federal coal leases, with remaining annual payments of $247.9 million due in each of the next four years.

In July 2011, the Company was named by the BLM as the winning bidder for control of approximately 220 million tons of federal coal reserves adjacent to its Caballo Mine in the Powder River Basin at a bid price of $0.95 per mineable ton, with payments of $42.1 million due annually in each of the years from 2011 through 2015 pursuant to the associated federal coal lease (the Belle Ayr North Lease). Similarly, in September 2011, a subsidiary of Alpha Natural Resources, Inc. (Alpha) was named by the BLM as the winning bidder for control of approximately 130 million tons of federal coal reserves in the Powder River Basin at a bid price of $1.10 per mineable ton, with contractual payments of $28.6 million due annually in each of the years from 2011 through 2015 under the associated federal coal lease (the Caballo West Lease). In July 2012, the Company and Alpha executed a lease exchange agreement with the BLM whereby the Company agreed to sell, assign and transfer its interest in the Belle Ayr North Lease in exchange for (i) Alpha's interest in the Caballo West Lease, (ii) reimbursement of $13.5 million for the difference in the related federal coal lease payments made by each party in 2011 and (iii) five annual true up payments of $3.9 million for the excess of the $1.10 bid price per mineable ton assumed under the Caballo West Lease over the $0.95 price under the transferred lease. An aggregate of $17.4 million was received from Alpha at closing for the reimbursement payment and first true up payment, which was classified in "Proceeds from disposal of assets" in the unaudited condensed consolidated statement of cash flows for the nine months ended September 30, 2012. The four remaining annual true up payments are due from Alpha on November 1 in each of the years from 2012 through 2015.

The federal coal leases executed with the BLM described above expire after a 20-year initial term, unless at such time there is ongoing production on the subject leases or within an active logical mining unit of which they are part.

Other

In the third quarter of 2012, the Company entered into long-term agreements with Kinder Morgan Energy Partners L.P. (Kinder Morgan) to secure and expand the Gulf Coast export platform of the Company's Western U.S. Mining and Midwestern U.S. Mining coal products. Under the multi-terminal agreements, the Company gains additional access to Kinder Morgan's Deepwater Terminal and Houston Bulk Terminal near Houston, Texas and International Marine Terminal in Myrtle Grove, Louisiana through 2021 and 2020, respectively. The agreements are expected to increase the Company's annual Gulf Coast coal export capacity by approximately 2 million and 4 million tons in 2013 and 2014, respectively, and 5 million to 7 million tons in each of the years from 2015 through 2020. These agreements are subject to customary minimum throughput obligations during those periods at commercially reasonable coal handling, blending and storage rates.

There were no other material changes to the Company’s commitments from the information provided in Note 23 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

Contingencies

From time to time, the Company and/or its subsidiaries are involved in legal proceedings arising in the ordinary course of business or related to indemnities or historical operations. The Company believes it has recorded adequate reserves for these liabilities and that there is no individual case pending that is likely to have a material adverse effect on the Company’s financial condition, results of operations or cash flows. The Company discusses its significant legal proceedings below.

31

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Litigation Relating to Continuing Operations

Gulf Power Company Litigation.  On June 22, 2006, Gulf Power Company (Gulf Power) filed a breach of contract lawsuit against a Company subsidiary in the U.S. District Court, Northern District of Florida, contesting the force majeure declaration by the Company’s subsidiary under a coal supply agreement with Gulf Power and seeking damages for alleged past and future tonnage shortfalls of nearly 5 million tons under the agreement, which expired on December 31, 2007. On June 30, 2009, the court granted Gulf Power’s motion for partial summary judgment on liability and denied the Company subsidiary’s motion for summary judgment. On September 30, 2010, the court entered its order on damages, awarding Gulf Power zero dollars in damages and the Company subsidiary its costs to defend the lawsuit. On November 1, 2010, Gulf Power filed a motion to alter or amend the judgment, contesting the trial court’s damages order, to which the Company subsidiary objected. The court entered an order on July 29, 2011 that affirmed its September 30, 2010 decision in all respects except for 2007 cover coal purchases and granted in part Gulf Power's motion to alter judgment with respect to 2007 cover coal purchases. On September 30, 2011, the court entered an order awarding Gulf Power damages in the amount of $20.5 million for its 2007 cover coal purchases. On January 19, 2012, the court entered its order awarding Gulf Power prejudgment interest in the amount of $6.9 million plus post-judgment interest. The Company's subsidiary has filed its notice of appeal and briefing is complete. Oral arguments before the U.S. Court of Appeals for the Eleventh Circuit is scheduled for the week of January 26, 2013. Based on the Company's evaluation of information currently available concerning the issues and their potential impact, the Company believes that its subsidiary will be successful in the liability appeals process and, therefore, no liability has been recorded at this time.

Monto Coal Pty Limited, Monto Coal 2 Pty Ltd Limited and Macarthur Coal Limited. In October 2007, a statement of claim was delivered to Monto Coal Pty Ltd, a wholly owned subsidiary of PEA-PCI, then Macarthur Coal Limited, and Monto Coal 2 Pty Ltd, an equity accounted investee, from the minority interest holders in the Monto Coal Joint Venture, alleging that Monto Coal 2 Pty Ltd breached the Monto Coal Joint Venture Agreement and Monto Coal Pty Ltd breached the Monto Coal Management Agreement. Monto Coal Pty Ltd is the manager of the Monto Coal Joint Venture pursuant to the Management Agreement. Monto Coal 2 Pty Ltd holds a 51% interest in the Monto Coal Joint Venture. The plaintiffs are Sanrus Pty Ltd, Edge Developments Pty Ltd and H&J Enterprises (Qld) Pty Ltd. An additional statement of claim was delivered to PEA-PCI in November 2010 from the same minority interest holders in the Monto Coal Joint Venture, alleging that PEA-PCI induced Monto Coal 2 Pty Ltd and Monto Coal Pty Ltd to breach the Monto Coal Joint Venture Agreement and the Monto Coal Management Agreement, respectively. These actions, which are pending before the Supreme Court of Queensland, Australia, seek damages from the three defendants collectively of no less than $1,193.2 million Australian dollars, plus interest and costs. The defendants dispute the claims and are vigorously defending their positions. Based on the Company's evaluation of the issues and their potential impact, the amount of any future loss cannot be reasonably estimated. However, based on current information, the Company believes these claims are likely to be finalized without a material adverse effect on its financial condition, results of operations or cash flows.

Claims and Litigation Relating to Indemnities or Historical Operations

Oklahoma Lead Claims.  Gold Fields Mining, LLC (Gold Fields) is a dormant, non-coal producing entity that was previously managed and owned by Hanson plc, the Company’s predecessor owner. In a February 1997 spin-off, Hanson plc transferred ownership of Gold Fields to the Company, despite the fact that Gold Fields had no ongoing operations and the Company had no prior involvement in its past operations. Gold Fields is currently one of the Company’s subsidiaries. The Company indemnified TXU Group with respect to certain claims relating to a former affiliate of Gold Fields. A predecessor of Gold Fields formerly operated two lead mills near Picher, Oklahoma prior to the 1950s and mined, in accordance with lease agreements and permits, approximately 0.15% of the total amount of the crude ore mined in the county.

In June 2005, Gold Fields and other potentially responsible parties (PRPs) received a letter from the U. S. Department of Justice alleging that the PRPs' mining operations caused the U.S. Environmental Protection Agency (EPA) to incur approximately $125 million in residential yard remediation costs at Picher, Oklahoma and will cause the EPA to incur additional remediation costs relating to historical mining sites. In June 2008, Gold Fields and other PRPs received letters from the U.S. Department of Justice and the EPA re-initiating settlement negotiations. Gold Fields continues to participate in the settlement discussions. Gold Fields believes it has meritorious defenses to these claims.

In February 2005, the state of Oklahoma, on behalf of itself and several other parties, sent a notice to Gold Fields and other companies regarding a possible natural resources damage claim. The state of Oklahoma has also indicated that it seeks to recover remediation costs from these parties.

32

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The outcome of these claims is subject to numerous uncertainties. Based on the Company’s evaluation of the issues and their potential impact, the amount of any future loss cannot be reasonably estimated. However, based on current information, the Company believes these claims are likely to be resolved without a material adverse effect on its financial condition, results of operations or cash flows.

Patriot Coal Corporation. On October 23, 2012, eight individual plaintiffs and the United Mine Workers of America filed a putative class action lawsuit in the U.S. District Court for the Southern District of West Virginia against Peabody Holding Company, LLC, Peabody Energy Corporation and an unrelated coal company. The lawsuit seeks to have the court obligate the defendants to maintain certain Patriot Coal Corporation benefit plans at their current levels and to find the defendants actions in violation of the Employee Retirement Income Security Act of 1974. The Company believes that the lawsuit is without merit and will vigorously defend against it.

Environmental Claims and Litigation

Environmental claims have been asserted against Gold Fields related to activities of Gold Fields or a former affiliate. Gold Fields or the former affiliate has been named a PRP at five national priority list sites based on the Superfund Amendments and Reauthorization Act of 1986. Claims were asserted at 13 additional sites, bringing the total to 18, which have since been reduced to 10 by completion of work, transfer or regulatory inactivity. The number of PRP sites in and of itself is not a relevant measure of liability because the nature and extent of environmental concerns varies by site, as does the estimated share of responsibility relative to other PRPs for Gold Fields or the former affiliate. Undiscounted liabilities for environmental cleanup-related costs for all of the sites noted above were $48.7 million as of September 30, 2012 and $52.5 million as of December 31, 2011, $7.8 million and $11.6 million of which was reflected as a current liability, respectively. These amounts represent those costs that the Company believes are probable and reasonably estimable.

Significant uncertainty exists as to whether claims will be pursued against Gold Fields in all cases, and where they are pursued, the amount of the eventual costs and liabilities, which could be greater or less than the liabilities recorded in the consolidated balance sheets. Based on the Company's evaluation of the issues and their potential impact, the total amount of any future loss cannot be reasonably estimated. However, based on current information, the Company believes these claims are likely to be resolved without a material adverse effect on its financial condition, results of operations or cash flows.

Native Village of Kivalina and City of Kivalina v. ExxonMobil Corporation, et al.  In February 2008, the Native Village of Kivalina and the City of Kivalina filed a lawsuit in the U.S. District Court for the Northern District of California against the Company, several owners of electricity generating facilities and several oil companies. The plaintiffs are the governing bodies of a village in Alaska that they contend is being destroyed by erosion allegedly caused by global warming that the plaintiffs attribute to emissions of greenhouse gases by the defendants. The plaintiffs assert claims for nuisance, and allege that the defendants have acted in concert and are jointly and severally liable for the plaintiffs’ damages. The suit seeks damages for lost property values and for the cost of relocating the village. The defendants filed motions to dismiss on the grounds of lack of personal and subject matter jurisdiction. In June 2009, the court granted defendants’ motion to dismiss for lack of subject matter jurisdiction finding that plaintiffs’ federal claim for nuisance is barred by the political question doctrine and for lack of standing. The plaintiffs appealed the court’s dismissal to the U.S. Court of Appeals for the Ninth Circuit, which heard oral arguments on November 28, 2011. On September 29, 2012, the U.S. Court of Appeals for the Ninth Circuit affirmed the district court's dismissal of the case on the grounds that the Clean Air Act and Environmental Protection Agency action under the Clean Air Act displaces the plaintiffs' claims.  On October 4, 2012, the plaintiffs filed a petition for rehearing en banc, which requests the case to be heard before all judges of the court.

Other

In addition, at times the Company becomes a party to other claims, lawsuits, arbitration proceedings and administrative procedures in the ordinary course of business in the U.S., Australia and other countries where the Company does business. In June 2007, the New York Office of the Attorney General served a letter and subpoena on the Company, seeking information and documents relating to the Company's disclosure to investors of risks associated with possible climate change and related legislation and regulations. The Company believes it has made full and proper disclosure of these potential risks. Based on current information, the Company believes that the ultimate resolution of such other pending or threatened proceedings is not reasonably likely to have a material adverse effect on its financial position, results of operations or cash flows.

33

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(17) Segment Information

The Company reports its results of operations primarily through the following reportable segments: “Western U.S. Mining,” “Midwestern U.S. Mining,” “Australian Mining,” “Trading and Brokerage” and “Corporate and Other.” The Company’s chief operating decision maker uses Adjusted EBITDA as the primary measure of segment profit and loss. The Company defines Adjusted EBITDA as income from continuing operations before deducting net interest expense, income taxes, asset retirement obligation expenses, depreciation, depletion and amortization and amortization of basis difference associated with equity method investments.

Reportable segment results were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Revenues:
Australian Mining	$	866.0		$	718.7		$	2,605.0		$	2,155.3
Western U.S. Mining	783.5			758.5			2,213.5			2,124.5
Midwestern U.S. Mining	355.7			368.5			1,050.1			1,025.3
Trading and Brokerage	45.6			131.5			173.7			329.5
Corporate and Other	8.0			3.4			18.3			31.5
Total	$	2,058.8		$	1,980.6		$	6,060.6		$	5,666.1
Adjusted EBITDA:
Australian Mining	$	221.4		$	246.1		$	757.4		$	852.2
Western U.S. Mining	243.9			218.7			616.3			532.2
Midwestern U.S. Mining	103.5			105.4			317.4			292.8
Trading and Brokerage	35.7			57.4			109.2			134.6
Corporate and Other	(144.6		)	(119.1		)	(378.8		)	(273.4		)
Total	$	459.9		$	508.5		$	1,421.5		$	1,538.4

A reconciliation of Adjusted EBITDA to consolidated income from continuing operations, net of income taxes follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Total Adjusted EBITDA	$	459.9		$	508.5		$	1,421.5		$	1,538.4
Depreciation, depletion and amortization	172.5			108.4			470.7			317.6
Amortization of basis difference related to equity affiliates	(0.2		)	—			3.0			—
Asset retirement obligation expenses	21.1			14.6			53.3			43.3
Interest expense	99.4			59.2			308.3			159.1
Interest income	(5.1		)	(4.1		)	(19.7		)	(11.7		)
Income tax provision	49.3			39.2			85.5			238.8
Income from continuing operations, net of income taxes	$	122.9		$	291.2		$	520.4		$	791.3

34

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

(18) Supplemental Guarantor/Non-Guarantor Financial Information

In accordance with the indentures governing the 5.875% Senior Notes due April 2016 (redeemed in the second quarter of 2011), the 7.375% Senior Notes due November 2016, the 6.00% Senior Notes due September 2018, the 6.50% Senior Notes due September 2020, the 6.25% Senior Notes due September 2021 and the 7.875% Senior Notes due November 2026 (collectively the Senior Notes), certain wholly owned U.S. subsidiaries of the Company have fully and unconditionally guaranteed the Senior Notes, on a joint and several basis. Separate financial statements and other disclosures concerning the Guarantor Subsidiaries are not presented because management believes that such information is not material to the holders of the Senior Notes. The following historical financial statement information is provided for the Guarantor/Non-Guarantor Subsidiaries.

Unaudited Supplemental Condensed Consolidating Statements of Income

	Three Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	1,336.9		$	778.3		$	(56.4	)	$	2,058.8
Costs and expenses
Operating costs and expenses	(95.6		)	882.8			778.2			(56.4		)	1,509.0
Depreciation, depletion and amortization	—			84.8			87.7			—			172.5
Asset retirement obligation expenses	—			11.8			9.3			—			21.1
Selling and administrative expenses	8.3			54.5			5.9			—			68.7
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(1.4		)	1.2			—			(0.2		)
(Income) loss from equity affiliates	(117.0		)	1.9			19.3			117.0			21.2
Interest expense	101.8			5.8			124.4			(132.6		)	99.4
Interest income	(72.9		)	(46.8		)	(18.0		)	132.6			(5.1		)
Unrealized (gain) loss on derivatives	—			(112.3		)	112.3			—			—
Income (loss) from continuing operations before income taxes	175.4			455.8			(342.0		)	(117.0		)	172.2
Income tax provision (benefit)	131.8			101.7			(184.2		)	—			49.3
Income (loss) from continuing operations, net of income taxes	43.6			354.1			(157.8		)	(117.0		)	122.9
Loss from discontinued operations, net of income taxes	(0.7		)	(75.9		)	(4.7		)	—			(81.3		)
Net income (loss)	42.9			278.2			(162.5		)	(117.0		)	41.6
Less: Net loss attributable to noncontrolling interests	—			—			(1.3		)	—			(1.3		)
Net income (loss) attributable to common stockholders	$	42.9		$	278.2		$	(161.2	)	$	(117.0	)	$	42.9
Comprehensive income (loss) attributable to common stockholders	$	119.3		$	291.7		$	(175.8	)	$	(115.9	)	$	119.3

35

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Unaudited Supplemental Condensed Consolidating Statements of Income

	Three Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	1,213.3		$	811.3		$	(44.0	)	$	1,980.6
Costs and expenses
Operating costs and expenses	(99.3		)	905.0			637.7			(44.0		)	1,399.4
Depreciation, depletion and amortization	—			69.6			38.8			—			108.4
Asset retirement obligation expenses	—			11.0			3.6			—			14.6
Selling and administrative expenses	8.0			52.5			10.7			—			71.2
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(1.8		)	0.1			—			(1.7		)
(Income) loss from equity affiliates	(252.5		)	2.7			0.5			252.5			3.2
Interest expense	61.0			13.7			1.9			(17.4		)	59.2
Interest income	(4.1		)	(5.2		)	(12.2		)	17.4			(4.1		)
Income from continuing operations before income taxes	286.9			165.8			130.2			(252.5		)	330.4
Income tax provision (benefit)	12.9			46.7			(20.4		)	—			39.2
Income from continuing operations, net of income taxes	274.0			119.1			150.6			(252.5		)	291.2
Income (loss) from discontinued operations, net of income taxes	0.1			(7.7		)	(2.1		)	—			(9.7		)
Net income	274.1			111.4			148.5			(252.5		)	281.5
Less: Net income attributable to noncontrolling interests	—			—			7.4			—			7.4
Net income attributable to common stockholders	$	274.1		$	111.4		$	141.1		$	(252.5	)	$	274.1
Comprehensive income attributable to common stockholders	$	82.4		$	121.5		$	205.2		$	(326.7	)	$	82.4

36

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Unaudited Supplemental Condensed Consolidating Statements of Income

	Nine Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	3,539.2		$	2,694.4		$	(173.0	)	$	6,060.6
Costs and expenses
Operating costs and expenses	(313.2		)	2,546.9			2,336.1			(173.0		)	4,396.8
Depreciation, depletion and amortization	—			232.0			238.7			—			470.7
Asset retirement obligation expenses	—			34.7			18.6			—			53.3
Selling and administrative expenses	29.2			154.5			18.7			—			202.4
Other operating (income) loss:
Net gain on disposal or exchange of assets	—			(6.3		)	(1.3		)	—			(7.6		)
(Income) loss from equity affiliates	(407.9		)	5.7			44.8			407.9			50.5
Interest expense	312.1			12.9			350.3			(367.0		)	308.3
Interest income	(224.3		)	(112.6		)	(49.8		)	367.0			(19.7		)
Unrealized (gain) loss on derivatives	—			(69.6		)	69.6			—			—
Income (loss) from continuing operations before income taxes	604.1			741.0			(331.3		)	(407.9		)	605.9
Income tax provision (benefit)	182.7			155.3			(252.5		)	—			85.5
Income (loss) from continuing operations, net of income taxes	421.4			585.7			(78.8		)	(407.9		)	520.4
Loss from discontinued operations, net of income taxes	(1.1		)	(78.0		)	(13.6		)	—			(92.7		)
Net income (loss)	420.3			507.7			(92.4		)	(407.9		)	427.7
Less: Net income attributable to noncontrolling interests	—			—			7.4			—			7.4
Net income (loss) attributable to common stockholders	$	420.3		$	507.7		$	(99.8	)	$	(407.9	)	$	420.3
Comprehensive income attributable to common stockholders	$	585.9		$	548.6		$	34.4		$	(583.0	)	$	585.9

37

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Unaudited Supplemental Condensed Consolidating Statements of Income

	Nine Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	3,427.8		$	2,456.5		$	(218.2	)	$	5,666.1
Costs and expenses
Operating costs and expenses	(289.3		)	2,619.7			1,846.5			(218.2		)	3,958.7
Depreciation, depletion and amortization	—			210.5			107.1			—			317.6
Asset retirement obligation expenses	—			30.7			12.6			—			43.3
Selling and administrative expenses	24.9			151.0			15.5			—			191.4
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(32.3		)	0.9			—			(31.4		)
(Income) loss from equity affiliates	(664.3		)	6.4			2.6			664.3			9.0
Interest expense	162.3			40.6			7.5			(51.3		)	159.1
Interest income	(12.8		)	(15.8		)	(34.4		)	51.3			(11.7		)
Income from continuing operations before income taxes	779.2			417.0			498.2			(664.3		)	1,030.1
Income tax provision	43.1			109.0			86.7			—			238.8
Income from continuing operations, net of income taxes	736.1			308.0			411.5			(664.3		)	791.3
Loss from discontinued operations, net of income taxes	(0.7		)	(6.3		)	(31.9		)	—			(38.9		)
Net income	735.4			301.7			379.6			(664.3		)	752.4
Less: Net income attributable to noncontrolling interests	—			—			17.0			—			17.0
Net income attributable to common stockholders	$	735.4		$	301.7		$	362.6		$	(664.3	)	$	735.4
Comprehensive income attributable to common stockholders	$	664.2		$	337.3		$	405.8		$	(743.1	)	$	664.2

38

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Unaudited Supplemental Condensed Consolidating Balance Sheets

	September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Reclassifications/ Eliminations			Consolidated
	(Dollars in millions)
Assets
Current assets
Cash and cash equivalents	$	237.9		$	0.2		$	409.9	$	—		$	648.0
Accounts receivable, net	5.4			72.1			604.7		—			682.2
Inventories	—			257.4			297.5		—			554.9
Assets from coal trading activities, net	—			9.6			46.6		—			56.2
Deferred income taxes	—			69.6			—		(53.8		)	15.8
Other current assets	317.7			23.3			356.6		—			697.6
Total current assets	561.0			432.2			1,715.3		(53.8		)	2,654.7
Property, plant, equipment and mine development, net	—			5,130.5			7,380.6		—			12,511.1
Investments and other assets	10,700.6			106.0			936.0		(10,058.0		)	1,684.6
Total assets	$	11,261.6		$	5,668.7		$	10,031.9	$	(10,111.8	)	$	16,850.4
Liabilities and Stockholders’ Equity
Current liabilities
Current maturities of long-term debt	$	75.0		$	—		$	49.8	$	—		$	124.8
Payables to (receivables from) affiliates, net	2,272.8			(2,576.6		)	303.8		—			—
Liabilities from coal trading activities, net	—			9.7			10.2		—			19.9
Deferred income taxes	11.6			—			42.2		(53.8		)	—
Accounts payable and accrued expenses	121.1			704.1			819.9		—			1,645.1
Total current liabilities	2,480.5			(1,862.8		)	1,225.9		(53.8		)	1,789.8
Long-term debt, less current maturities	6,132.7			6.6			99.0		—			6,238.3
Deferred income taxes	66.6			126.0			192.4		—			385.0
Notes (receivable from) payable to affiliates, net	(3,421.3		)	(1,097.4		)	4,518.7		—			—
Other noncurrent liabilities	58.5			1,975.4			426.4		—			2,460.3
Total liabilities	5,317.0			(852.2		)	6,462.4		(53.8		)	10,873.4
Peabody Energy Corporation’s stockholders’ equity	5,944.6			6,520.9			3,537.1		(10,058.0		)	5,944.6
Noncontrolling interests	—			—			32.4		—			32.4
Total stockholders’ equity	5,944.6			6,520.9			3,569.5		(10,058.0		)	5,977.0
Total liabilities and stockholders’ equity	$	11,261.6		$	5,668.7		$	10,031.9	$	(10,111.8	)	$	16,850.4

39

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Supplemental Condensed Consolidating Balance Sheets

	December 31, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Reclassifications/ Eliminations			Consolidated
	(Dollars in millions)
Assets
Current assets
Cash and cash equivalents	$	283.2		$	0.8		$	515.1	$	—		$	799.1
Accounts receivable, net	5.3			100.8			816.4		—			922.5
Inventories	—			218.1			226.3		—			444.4
Assets from coal trading activities, net	—			14.9			29.7		—			44.6
Deferred income taxes	—			48.0			—		(20.7		)	27.3
Other current assets	305.1			100.7			362.2		—			768.0
Total current assets	593.6			483.3			1,949.7		(20.7		)	3,005.9
Property, plant, equipment and mine development, net	—			4,797.7			6,453.9		—			11,251.6
Investments and other assets	10,300.8			310.8			1,496.1		(9,632.2		)	2,475.5
Total assets	$	10,894.4		$	5,591.8		$	9,899.7	$	(9,652.9	)	$	16,733.0
Liabilities and Stockholders’ Equity
Current liabilities
Current maturities of long-term debt	$	62.5		$	—		$	38.6	$	—		$	101.1
Payables to (receivables from) affiliates, net	2,417.8			(2,529.1		)	111.3		—			—
Liabilities from coal trading activities, net	—			4.2			6.1		—			10.3
Deferred income taxes	11.6			—			9.1		(20.7		)	—
Accounts payable and accrued expenses	69.4			868.8			774.1		—			1,712.3
Total current liabilities	2,561.3			(1,656.1		)	939.2		(20.7		)	1,823.7
Long-term debt, less current maturities	6,428.8			—			127.6		—			6,556.4
Deferred income taxes	76.0			95.3			351.9		—			523.2
Notes (receivable from) payable to affiliates, net	(3,720.0		)	(981.5		)	4,701.5		—			—
Other noncurrent liabilities	63.2			1,923.6			327.1		—			2,313.9
Total liabilities	5,409.3			(618.7		)	6,447.3		(20.7		)	11,217.2
Peabody Energy Corporation’s stockholders’ equity	5,485.1			6,210.5			3,421.7		(9,632.2		)	5,485.1
Noncontrolling interests	—			—			30.7		—			30.7
Total stockholders’ equity	5,485.1			6,210.5			3,452.4		(9,632.2		)	5,515.8
Total liabilities and stockholders’ equity	$	10,894.4		$	5,591.8		$	9,899.7	$	(9,652.9	)	$	16,733.0

40

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

	Nine Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
	(Dollars in millions)
Cash Flows From Operating Activities
Net cash provided by (used in) continuing operations	$	252.2		$	1,225.0		$	(103.5	)	$	1,373.7
Net cash used in discontinued operations	(1.6		)	(8.0		)	(72.6		)	(82.2		)
Net cash provided by (used in) operating activities	250.6			1,217.0			(176.1		)	1,291.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	—			(188.3		)	(543.8		)	(732.1		)
Federal coal lease expenditures	—			(247.9		)	—			(247.9		)
Investment in Prairie State Energy Campus	—			(9.4		)	—			(9.4		)
Proceeds from disposal of assets	—			59.3			34.2			93.5
Proceeds from sales and maturities of debt and equity securities	—			—			39.0			39.0
Purchases of debt and equity securities	—			—			(23.8		)	(23.8		)
Contributions to joint ventures	—			—			(531.2		)	(531.2		)
Distributions from joint ventures	—			—			527.7			527.7
Repayments of loans from related parties	—			—			720.2			720.2
Advances to related parties	—			—			(743.4		)	(743.4		)
Other, net	—			(3.0		)	(0.2		)	(3.2		)
Net cash used in continuing operations	—			(389.3		)	(521.3		)	(910.6		)
Net cash used in discontinued operations	—			(1.9		)	(9.3		)	(11.2		)
Net cash used in investing activities	—			(391.2		)	(530.6		)	(921.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(285.3		)	(0.3		)	(20.1		)	(305.7		)
Common stock repurchase	(99.9		)	—			—			(99.9		)
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	—			—			(49.8		)	(49.8		)
Dividends paid	(69.1		)	—			—			(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(8.3		)	—			—			(8.3		)
Excess tax benefits related to share-based compensation	3.6			—			—			3.6
Other, net	9.4			—			(1.0		)	8.4
Transactions with affiliates, net	153.7			(826.1		)	672.4			—
Net cash (used in) provided by financing activities	(295.9		)	(826.4		)	601.5			(520.8		)
Net change in cash and cash equivalents	(45.3		)	(0.6		)	(105.2		)	(151.1		)
Cash and cash equivalents at beginning of period	283.2			0.8			515.1			799.1
Cash and cash equivalents at end of period	$	237.9		$	0.2		$	409.9		$	648.0

41

PEABODY ENERGY CORPORATION

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

	Nine Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
	(Dollars in millions)
Cash Flows From Operating Activities
Net cash provided by continuing operations	$	144.7		$	718.3		$	353.7		$	1,216.7
Net cash (used in) provided by discontinued operations	(1.6		)	1.2			(25.8		)	(26.2		)
Net cash provided by operating activities	143.1			719.5			327.9			1,190.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	—			(211.1		)	(342.3		)	(553.4		)
Federal coal lease expenditures	—			(42.4		)	—			(42.4		)
Investment in Prairie State Energy Campus	—			(29.8		)	—			(29.8		)
Proceeds from disposal of assets	—			12.1			—			12.1
Investment in equity affiliates and joint ventures	—			(2.1		)	(37.7		)	(39.8		)
Proceeds from sales and maturities of debt and equity securities	—			—			53.3			53.3
Purchases of debt and equity securities	—			—			(44.1		)	(44.1		)
Purchases of short-term investments	(75.0		)	—			(25.0		)	(100.0		)
Proceeds from sale of short-term investments	75.0			—			25.0			100.0
Investment in shares of Macarthur Coal Limited	—			—			(45.5		)	(45.5		)
Other, net	—			(4.4		)	—			(4.4		)
Net cash used in continuing operations	—			(277.7		)	(416.3		)	(694.0		)
Net cash used in discontinued operations	—			(7.5		)	(55.3		)	(62.8		)
Net cash used in investing activities	—			(285.2		)	(471.6		)	(756.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(236.9		)	—			(11.5		)	(248.4		)
Dividends paid	(69.1		)	—			—			(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(16.1		)	—			—			(16.1		)
Excess tax benefits related to share-based compensation	6.1			—			—			6.1
Other, net	6.8			—			(6.6		)	0.2
Transactions with affiliates, net	220.2			(438.5		)	218.3			—
Net cash (used in) provided by financing activities	(89.0		)	(438.5		)	200.2			(327.3		)
Net change in cash and cash equivalents	54.1			(4.2		)	56.5			106.4
Cash and cash equivalents at beginning of period	903.8			5.2			386.2			1,295.2
Cash and cash equivalents at end of period	$	957.9		$	1.0		$	442.7		$	1,401.6

42

Item 2.    Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Cautionary Notice Regarding Forward-Looking Statements

This report includes statements of our expectations, intentions, plans and beliefs that constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 and are intended to come within the safe harbor protection provided by those sections. These statements relate to future events or our future financial performance, including, without limitation, the section captioned “Outlook” in Management’s Discussion and Analysis of Financial Condition and Results of Operations. We use words such as “anticipate,” “believe,” “expect,” “may,” “project,” “should,” “estimate” or “plan” or other similar words to identify forward-looking statements.

Without limiting the foregoing, all statements relating to our future operating results, anticipated capital expenditures, future cash flows and borrowings and sources of funding are forward-looking statements and speak only as of the date of this report. These forward-looking statements are based on numerous assumptions that we believe are reasonable, but are subject to a wide range of uncertainties and business risks and actual results may differ materially from those discussed in these statements. Among the factors that could cause actual results to differ materially are:

• global supply and demand for coal, including the seaborne thermal and metallurgical coal markets;

• price volatility, particularly in higher-margin products and in our trading and brokerage businesses;

• impact of alternative energy sources, including natural gas and renewables;

• global steel demand and the downstream impact on metallurgical coal prices;

• impact of weather and natural disasters on demand, production and transportation;

• reductions and/or deferrals of purchases by major customers and ability to renew sales contracts;

• credit and performance risks associated with customers, suppliers, contract miners, co-shippers and trading, banks and other financial counterparties;

• geologic, equipment, permitting and operational risks related to mining;

• transportation availability, performance and costs;

• availability, timing of delivery and costs of key supplies, capital equipment or commodities such as diesel fuel, steel, explosives and tires;

• integration of Macarthur Coal Limited (PEA-PCI) operations;

• successful implementation of business strategies;

• negotiation of labor contracts, employee relations and workforce availability;

• changes in postretirement benefit and pension obligations and their related funding requirements;

• replacement and development of coal reserves;

• availability, access to and the related cost of capital and financial markets;

• effects of changes in interest rates and currency exchange rates (primarily the Australian dollar);

• effects of acquisitions or divestitures;

• economic strength and political stability of countries in which we have operations or serve customers;

• legislation, regulations and court decisions or other government actions, including, but not limited to, new environmental and mine safety requirements and changes in income tax regulations, sales-related royalties or other regulatory taxes;

• litigation, including claims not yet asserted;

• terrorist attacks or threats;

• impacts of pandemic illnesses; and

• other factors, including those discussed in Part II, Item 1. "Legal Proceedings."

43

When considering these forward-looking statements, you should keep in mind the cautionary statements in this document and in our other Securities and Exchange Commission (SEC) filings, including the more detailed discussion of these factors and other factors that could affect our results contained in Item 1A. “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2011. These forward-looking statements speak only as of the date on which such statements were made, and we undertake no obligation to update these statements except as required by federal securities laws.

When used in this filing, the term "ton" refers to short or net tons, equal to 2,000 pounds (907.18 kilograms), while "tonne" refers to metric tons, equal to 2,294.62 pounds (1,000 kilograms).

Overview

We are the world’s largest private sector coal company. We own interests in 29 coal mining operations, including a majority interest in 28 coal mining operations located in the United States (U.S.) and Australia and a 50% equity interest in the Middlemount Mine in Australia. We also own a noncontrolling interest in a mining operation in Venezuela. In addition to our mining operations, we market, broker and trade coal through trading and business offices in China, Australia, the United Kingdom, Germany, Singapore, Indonesia, Mongolia and the U.S.

In 2011, we produced and sold 226.3 million and 249.4 million tons of coal, respectively. During this period, 82% of our total sales (by volume) were to U.S. electricity generators, 15% were to customers outside the U.S. and 3% were to the U.S. industrial sector. Approximately 91% of our prior year worldwide sales (by volume) were under long-term contracts (those with terms in excess of one year).

We conduct business through four principal operating segments: Western U.S. Mining, Midwestern U.S. Mining, Australian Mining and Trading and Brokerage. Our Western U.S. Mining segment consists of our Powder River Basin, Southwest and Colorado operations, while our Midwestern U.S. Mining segment consists of our operations in Illinois and Indiana.

The principal business of the Western and Midwestern U.S. Mining segments is the mining, preparation and sale of thermal coal. In the U.S., we typically supply thermal coal to domestic electricity generators and industrial customers for power generation under long-term contracts, with a portion sold into the seaborne export markets.

The business of our Australian Mining segment is the mining of various qualities of low-sulfur, high Btu coal (metallurgical coal), as well as thermal coal. Our Australian Mining operations are primarily export focused with customers spread across several countries, while a portion of our coal is sold to Australian steel producers and power generators. Revenues from individual countries generally vary year by year based on demand for electricity and steel, global economic strength and several other factors, including those specific to each country. Industry commercial practice, and our practice, is to negotiate pricing for metallurgical and seaborne thermal coal contracts on a quarterly and annual basis, respectively. On October 26, 2011, we acquired PEA-PCI, making us the third-largest holder of Australian coal reserves. From the date of acquisition, PEA-PCI’s results from operations have been included in our results and reflected in our Australian Mining segment, except for the activity associated with certain equity affiliates, which is reflected in our Corporate and Other segment.

The principal business of our Trading and Brokerage segment is the marketing and brokering of coal for other producers, both as principal and agent, and the trading of coal, freight and freight-related contracts. The segment also provides transportation-related services in support of our coal trading strategy and conducts hedging activities in support of sales from our mining operations.

Our fifth segment, Corporate and Other, includes mining and export/transportation joint ventures and activities associated with certain energy-related commercial matters, Btu Conversion and the optimization of our coal reserve and real estate holdings.

To maximize our coal assets and land holdings for long-term growth, we are contributing to the development of coal-fueled generation, pursuing Btu conversion projects that would convert coal to natural gas (CTG) or transportation fuels (CTL) and advancing clean coal technologies, including carbon capture and storage (CCS).

44

Results of Operations

Non-U.S. GAAP Financial Measures

The following discussion of our results of operations includes references to and analysis of Adjusted EBITDA, a financial measure not recognized in accordance with U.S. generally accepted accounting principles (GAAP). This financial measure is not intended as an alternative to U.S. GAAP measures of performance and may not be comparable to similarly-titled measures presented by other companies. We define Adjusted EBITDA as income from continuing operations before deducting net interest expense, income taxes, asset retirement obligation expenses, depreciation, depletion and amortization and amortization of basis difference associated with equity method investments. Adjusted EBITDA is used by management to measure our segments’ operating performance and management believes it is a useful indicator of our ability to meet debt service and capital expenditure requirements. Adjusted EBITDA is reconciled to its most comparable measure under U.S. GAAP in Note 17 to our unaudited condensed consolidated financial statements.

Three and Nine Months Ended September 30, 2012 Compared to the Three and Nine Months Ended September 30, 2011

Summary

U.S. coal markets experienced downturns in both consumption and production through the nine months ended September 30, 2012, with declines in U.S. coal-fueled generation driven by competition from natural gas for share of electricity generation, mild winter weather and weak economic activity. These negative factors were partially offset, particularly in the third quarter of 2012, by the benefit of above-average summer temperatures, higher-than-average coal stockpile drawdowns in June through August and higher natural gas prices in recent months compared to the beginning of the year.

In response to adverse domestic coal market conditions, numerous coal mining companies have implemented production cuts and idled operations throughout the current year. We permanently ceased production at our Air Quality Mine in Indiana in September 2012 due to uneconomic market conditions for the type of coal product previously produced at the site. The U.S. Energy Information Administration (EIA) reported total U.S. production decreased from the prior year through September2012 by 6% on both a quarter-to-date and year-to-date basis. As a result of the contraction in demand, we are targeting 2012 U.S. sales volumes of 188 to 192 million tons, a projected decline of approximately 6% to 8% from our 2011 volumes.

International coal markets continued to show signs of growth during the nine months ended September 30, 2012, though at a tempered pace compared to 2011. China's coal-fueled electricity generation rose approximately 1% from January through September 2012 as compared to the same period in 2011 according to the China National Energy Administration. India's coal-fueled electricity generation increased 12% from January through September 2012 compared to the corresponding prior year period according to the India Central Electricity Authority. Europe and Japan have increased their year-over-year electricity generation from coal due to reduced nuclear generation and the cost competitiveness of coal compared to natural gas in global markets. Steel production in the major Asian economies grew slightly by approximately 2% from January through September2012 according to data recently published by the World Steel Association (WSA), a modest rate compared with those observed during the same period in 2011. Worldwide steel production for the nine months ended September2012 increased by less than 1% compared to the corresponding prior year period, with growth in Asia and the U.S. offset by reduced production from Europe. This flat growth in steel production and deceleration in the pace of global economic growth, as evidenced by downward revisions in global gross domestic product (GDP) growth projections from the International Monetary Fund (IMF) during the nine months ended September 30, 2012, put downward pressure on seaborne coal prices. As a result, third quarter 2012 benchmark metallurgical and thermal coal prices decreased by 36% and 12%, respectively, compared with the year-ago quarter.

Revenues increased during both the three and nine months ended September 30, 2012 compared to the prior year (three months, $78.2 million; nine months, $394.5 million), led by contributions from our mines acquired as part of the PEA-PCI acquisition, higher average realized pricing in the U.S. and increased volumes from Australian mine expansions, partially offset by lower U.S. sales volumes and lower pricing realized on our Australian seaborne metallurgical and thermal coal sales during the second and third quarter.

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Segment Adjusted EBITDA decreased during the three and nine months ended September 30, 2012 compared to the prior year (three months, $23.1 million; nine months, $11.5 million). Higher worldwide volumes and U.S. pricing were offset by lower seaborne product pricing, operating cost escalations and contractor issues in Australia.

Income from continuing operations, net of income taxes, decreased in both the three and nine months ended September 30, 2012 compared to the prior year (three months, $168.3 million; nine months, $270.9 million), driven by lower Adjusted EBITDA and increases in interest expense and depreciation, depletion and amortization resulting from the PEA-PCI acquisition. Year-over-year changes in our effective tax rate further reduced earnings for the three months ended September 30, 2012 and improved earnings for the nine months then ended compared to 2011.

Net income declined during the three and nine months ended September 30, 2012 compared to 2011 (three months, $239.9 million; nine months, $324.7 million) due to lower income from continuing operations, net of income taxes, and charges recognized in the third quarter of 2012 related to the closing of our Air Quality Mine.

As of September 30, 2012, our available liquidity was approximately $2.2 billion, as discussed further in “Liquidity and Capital Resources.”

Tons Sold

The following table presents tons sold by operating segment:

	Three Months Ended		Increase (Decrease)				Nine Months Ended		Increase (Decrease)
	September 30,		to Volumes				September 30,		to Volumes
	2012	2011	Tons		%		2012	2011	Tons		%
	(Tons in millions)						(Tons in millions)
Australian Mining	8.5	6.1	2.4		39.3	%	23.3	18.2	5.1		28.0	%
Western U.S. Mining	44.0	43.7	0.3		0.7	%	124.4	127.2	(2.8	)	(2.2	)%
Midwestern U.S. Mining	7.0	7.6	(0.6	)	(7.9	)%	20.5	21.5	(1.0	)	(4.7	)%
Trading and Brokerage	7.1	5.5	1.6		29.1	%	17.0	14.4	2.6		18.1	%
Total tons sold	66.6	62.9	3.7		5.9	%	185.2	181.3	3.9		2.2	%

Revenues

The following table presents revenues by operating segment:

	Three Months Ended				Increase (Decrease)					Nine Months Ended				Increase (Decrease)
	September 30,				to Revenues					September 30,				to Revenues
	2012		2011		$			%		2012		2011		$			%
	(Dollars in millions)									(Dollars in millions)
Australian Mining	$	866.0	$	718.7	$	147.3		20.5	%	$	2,605.0	$	2,155.3	$	449.7		20.9	%
Western U.S. Mining	783.5		758.5		25.0			3.3	%	2,213.5		2,124.5		89.0			4.2	%
Midwestern U.S. Mining	355.7		368.5		(12.8		)	(3.5	)%	1,050.1		1,025.3		24.8			2.4	%
Trading and Brokerage	45.6		131.5		(85.9		)	(65.3	)%	173.7		329.5		(155.8		)	(47.3	)%
Corporate and Other	8.0		3.4		4.6			135.3	%	18.3		31.5		(13.2		)	(41.9	)%
Total revenues	$	2,058.8	$	1,980.6	$	78.2		3.9	%	$	6,060.6	$	5,666.1	$	394.5		7.0	%

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Revenues from our Australian Mining segment increased during the three and nine months ended September 30, 2012 compared to the prior year due to the benefit of additional sales volumes (three months, $324.8 million; nine months, $634.9 million) in spite of the unfavorable impact of lower year-over-year seaborne metallurgical and thermal coal settlement prices discussed above (three months, $177.5 million; nine months, $185.2 million). This volume increase was driven by contributions from the acquired PEA-PCI mines (three months, $182.5 million; nine months, $479.5 million) and an overall production increase from our legacy Australian platform (three months, $142.3 million; nine months, $155.4 million). The benefit of completed mine expansions at Wilpinjong and Millennium, lower overall downtimes due to longwall moves and the adverse production effects from a roof fall at one of our Australian mines in the third quarter of 2011, partially offset by production challenges from certain contractor-operated mines, contributed to the increase in coal produced for the three months ended September 30, 2012 compared to 2011. Metallurgical coal sales totaled 3.5 million and 1.6 million tons for the three months ended September 30, 2012 and 2011, respectively, and 10.0 million and 6.0 million tons for the nine months ended September 30, 2012 and 2011, respectively.

The increase in Western U.S. Mining segment revenues for the three and nine months ended September 30, 2012 compared to the prior year resulted mainly from higher contract pricing (three months, $44.0 million; nine months, $136.0 million). The favorable price variance was partially offset by the unfavorable net impact of sales volume and mix (three months, $19.0 million; nine months, $47.0 million). Demand from electric power generators was adversely impacted compared to the prior year by competition from natural gas during the three and nine months ended September 30, 2012 and, for the nine months then ended, lower heating-degree days compared to the prior year due to warm winter weather. These effects were partially offset by a slight increase in cooling-degree days in 2012 compared to 2011 due to warm summer weather.

Midwestern U.S. Mining segment revenues benefited from higher contract pricing for the three and nine months ended September 30, 2012 compared to the prior year (three months, $12.9 million; nine months, $55.4 million). This benefit was offset by reduced sales volumes for both periods compared to the prior year attributable to soft coal market demand. Volumes were also adversely affected in the current quarter compared to the year-ago quarter from the timing of shipments due to customer facility outages for planned maintenance. For the nine months ended September 30, 2012 compared to the year-ago period, the impact of lower demand on volume was partially offset by the effect of flooding in the Midwest region experienced in the second quarter of 2011, which led to production and transportation delays at that time.

Trading and Brokerage revenues for the three and nine months ended September 30, 2012 decreased compared to the prior year due to a higher portion of our contracts being recognized on a net basis in the current year resulting from the expiration of certain physical delivery contracts that were recognized on a gross basis in the condensed consolidated statements of income in 2011, in addition to lower realized prices.

The decrease in our Corporate and Other segment revenues for the nine months ended September 30, 2012 resulted from our receipt of a $14.6 million project development fee associated with Prairie State in the second quarter of 2011.

Segment Adjusted EBITDA

The following table presents segment Adjusted EBITDA by operating segment:

					Increase (Decrease)									Increase (Decrease)
	Three Months Ended				to Segment Adjusted					Nine Months Ended				to Segment Adjusted
	September 30,				EBITDA					September 30,				EBITDA
	2012		2011		$			%		2012		2011		$			%
	(Dollars in millions)									(Dollars in millions)
Australian Mining	$	221.4	$	246.1	$	(24.7	)	(10.0	)%	$	757.4	$	852.2	$	(94.8	)	(11.1	)%
Western U.S. Mining	243.9		218.7		25.2			11.5	%	616.3		532.2		84.1			15.8	%
Midwestern U.S. Mining	103.5		105.4		(1.9		)	(1.8	)%	317.4		292.8		24.6			8.4	%
Trading and Brokerage	35.7		57.4		(21.7		)	(37.8	)%	109.2		134.6		(25.4		)	(18.9	)%
Segment Adjusted EBITDA	$	604.5	$	627.6	$	(23.1	)	(3.7	)%	$	1,800.3	$	1,811.8	$	(11.5	)	(0.6	)%

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Adjusted EBITDA from our Australian Mining segment was adversely affected during the three and nine months ended September 30, 2012 compared to the prior year by lower seaborne coal pricing, net of sales-related costs (three months, $159.8 million; nine months, $158.1 million), cost increases and production challenges at certain of our contractor-operated sites (three months, $14.7 million; nine months, $87.2 million), inflationary cost escalations (three months, $18.4 million; nine months, $50.5 million), the foreign currency impact on operating costs, net of hedging (three months, $10.6 million; nine months, $13.0 million) and overburden remediation costs at our PEA-PCI operating sites. Those factors were partially offset by lower year-over-year costs associated with longwall moves and the roof fall at one of our Australian mines in the third quarter of 2011 (three months, $82.7 million; nine months, $124.8 million), higher sales volumes (three months, $31.4 million; nine months, $63.1 million) and lower costs from favorable geological conditions encountered at certain of our owner-operator mines (three months, $63.8 million; nine months, $23.0 million).

Higher contract pricing, net of sales-related costs, drove an increase in Western U.S. Mining segment Adjusted EBITDA for the three and nine months ended September 30, 2012 compared to the prior year (three months, $35.8 million; nine months, $107.6 million). Adjusted EBITDA results for the nine months ended September 30, 2012 also rose year-over-year from the impact of costs associated with certain geologic issues encountered at our Twentymile Mine in the first half of 2011 ($34.0 million) and a provision for settlement costs recorded in the second quarter of 2011 relating to certain litigation ($24.5 million). These benefits were partially offset during the the three and nine months ended September 30, 2012 compared to 2011 by an unfavorable net volume and mix variance (three months, $12.0 million; nine months, $37.9 million) and the effect of higher costs and usage of labor and materials and services (three months, $3.3 million; nine months, $31.2 million), the latter of which includes costs associated with planned longwall moves.

Midwestern U.S. Mining segment Adjusted EBITDA for the three and nine months ended September 30, 2012 benefited from higher contract pricing, net of sales-related costs, compared to the prior year (three months, $11.5 million; nine months, $45.7 million) and, for the nine months then ended, the absence of costs incurred in response to flooding in the Midwest during the second quarter of 2011 ($11.6 million). These benefits were offset by higher costs incurred during the three and nine months ended September 30, 2012 compared to the prior year associated with overburden removal (three months, $3.4 million; nine months, $15.6 million). The net effect of volume and mix was unfavorable for the three month ended September 30, 2012 ($3.9 million) and favorable for the nine months then ended ($10.7 million) compared to 2011, with the a decrease in shipped volumes offset by the impact of the expiration of a low-margin purchased coal contract in 2011.

Trading and Brokerage Adjusted EBITDA for the three and nine months ended September 30, 2012 decreased compared to the prior year attributed to the timing of shipment realizations, lower per-ton margin realizations on delivered and trading positions and a loss associated with the discounted sale to a third party of our outstanding claim with the special administrators of MF Global UK Limited.

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Income From Continuing Operations Before Income Taxes

The following table presents income from continuing operations before income taxes:

	Three Months Ended						Increase (Decrease)					Nine Months Ended						Increase (Decrease)
	September 30,						to Income					September 30,						to Income
	2012			2011			$			%		2012			2011			$			%
	(Dollars in millions)											(Dollars in millions)
Segment Adjusted EBITDA	$	604.5		$	627.6		$	(23.1	)	(3.7	)%	$	1,800.3		$	1,811.8		$	(11.5	)	(0.6	)%
Corporate and Other Adjusted EBITDA (1)	(144.6		)	(119.1		)	(25.5		)	(21.4	)%	(378.8		)	(273.4		)	(105.4		)	(38.6	)%
Depreciation, depletion and amortization	(172.5		)	(108.4		)	(64.1		)	(59.1	)%	(470.7		)	(317.6		)	(153.1		)	(48.2	)%
Asset retirement obligation expenses	(21.1		)	(14.6		)	(6.5		)	(44.5	)%	(53.3		)	(43.3		)	(10.0		)	(23.1	)%
Amortization of basis difference related to equity affiliates	0.2			—			0.2			(100.0	)%	(3.0		)	—			(3.0		)	(100.0	)%
Interest expense	(99.4		)	(59.2		)	(40.2		)	(67.9	)%	(308.3		)	(159.1		)	(149.2		)	(93.8	)%
Interest income	5.1			4.1			1.0			24.4	%	19.7			11.7			8.0			68.4	%
Income from continuing operations before income taxes	$	172.2		$	330.4		$	(158.2	)	(47.9	)%	$	605.9		$	1,030.1		$	(424.2	)	(41.2	)%

⁽¹⁾  Corporate and Other Adjusted EBITDA includes selling and administrative expenses, equity income (losses) from our joint ventures, gains (losses) on certain asset sales, resource management costs and revenues, coal royalty expense, costs associated with past mining activities, expenses related to our other commercial activities, such as generation development and Btu Conversion, and provisions for certain litigation.

Income from continuing operations before income taxes for the three and nine months ended September 30, 2012 decreased compared to the prior year. In addition to the changes in Segment Adjusted EBITDA, our results were negatively affected by lower Corporate and Other Adjusted EBITDA, increased depreciation, depletion and amortization and higher expenses associated with asset retirement obligations and interest. These factors were partially offset by higher interest income recognized in both current year periods compared to 2011.

Corporate and Other segment Adjusted EBITDA was adversely impacted in the three and nine months ended September 30, 2012 compared to the prior year by losses associated with our 50% interest in the Middlemount Mine obtained in connection with the PEA-PCI acquisition (three months, $19.5 million; nine months, $41.8 million), which were affected by unfavorable pricing in the international metallurgical coal market and contractor mining issues. Corporate and Other segment Adjusted EBITDA also declined during the nine months ended September 30, 2012 compared to the year-ago period as a result of respective gains of $23.5 million and $14.6 million recognized during the second quarter of 2011 associated with a non-cash coal reserve and land exchange transaction and our receipt of a project development fee related to our involvement in Prairie State.

Depreciation, depletion and amortization expenses for the three and nine months ended September 30, 2012 increased compared to the prior year due to expenses associated with acquired PEA-PCI mines (three months, $40.3 million; nine months, $101.6 million) and higher expenses from our legacy Australian mining platform driven by increased depletion rates and higher overall coal production.

Asset retirement obligation expenses were higher for the three and nine months ended September 30, 2012 compared to 2011. The increase was largely attributable to incremental expense associated with acquired PEA-PCI mines and the impact of reclamation plan changes at certain of our U.S. mines.

Additional debt incurred in connection with the PEA-PCI acquisition resulted in higher interest expense during the three and nine months ended September 30, 2012 compared to the prior year.

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Interest income increased in the three and nine months ended September 30, 2012 compared to 2011 due to income from interest-bearing receivables we hold associated with our contributions to the Middlemount Mine joint venture. This incremental income was partially offset in the three and nine months ended September 30, 2012 compared to the prior year by the impact of lower cash and cash equivalents balances and a decrease in income from debt securities associated with our pro-rata funding of the Newcastle Coal Infrastructure Group, our remaining holdings of which were sold during the nine months ended September 30, 2012.

Net Income Attributable to Common Stockholders

The following table presents net income attributable to common stockholders:

	Three Months Ended						Increase (Decrease)					Nine Months Ended						Increase (Decrease)
	September 30,						to Income					September 30,						to Income
	2012			2011			$			%		2012			2011			$			%
	(Dollars in millions)											(Dollars in millions)
Income from continuing operations before income taxes	$	172.2		$	330.4		$	(158.2	)	(47.9	)%	$	605.9		$	1,030.1		$	(424.2	)	(41.2	)%
Income tax provision	49.3			39.2			(10.1		)	25.8	%	85.5			238.8			153.3			(64.2	)%
Income from continuing operations, net of income taxes	122.9			291.2			(168.3		)	(57.8	)%	520.4			791.3			(270.9		)	(34.2	)%
Loss from discontinued operations, net of income taxes	(81.3		)	(9.7		)	(71.6		)	(738.1	)%	(92.7		)	(38.9		)	(53.8		)	(138.3	)%
Net income	41.6			281.5			(239.9		)	(85.2	)%	427.7			752.4			(324.7		)	(43.2	)%
Less: Net (loss) income attributable to noncontrolling interests	(1.3		)	7.4			8.7			(117.6	)%	7.4			17.0			9.6			(56.5	)%
Net income attributable to common stockholders	$	42.9		$	274.1		$	(231.2	)	(84.3	)%	$	420.3		$	735.4		$	(315.1	)	(42.8	)%

Net income attributable to common stockholders decreased in the three and nine months ended September 30, 2012 compared to the prior year largely due to the adverse changes in income from continuing operations before income taxes and results from discontinued operations. Changes in our effective tax rate further reduced earnings for the three months ended September 30, 2012 and improved earnings for the nine months then ended compared to 2011.

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Our earnings for the nine months ended September 30, 2012 were positively impacted from an improvement in our income tax provision compared to the prior year ($153.3 million), but lower for the three month period, primarily resulting from the following:

• The impact of lower current year income from continuing operations before income taxes (three months, $55.4 million; nine months, $148.5 million);

• The recognition of a net tax benefit of $59.7 million in the second quarter 2012 due to an acquisition restructuring enabling certain PEA-PCI tax entities to join our Australian consolidated tax group, comprised of a $14.6 million reduction in deferred tax liabilities and a $45.1 million net reduction in valuation allowances on certain deferred tax assets and net operating losses due to the required tax basis reset of PEA-PCI assets; partially offset by

• The impact from the remeasurement of non-U.S. tax accounts as a result of current year weakening of the Australian dollar compared with strengthening in the prior year (three months, $52.3 million; nine months, $25.6 million).

Loss from discontinued operations, net of income taxes for the three and nine months ended September 30, 2012 was negatively affected by aggregate after-tax charges of $75.0 million, which include an after-tax impairment charge of $68.8 million, recognized in the third quarter of 2012 related to the shutdown of our Air Quality Mine due to uneconomic market conditions for the type of coal previously produced at the site. These charges were partially offset by improved results during the three and nine months ended September 30, 2012 compared to the prior year from our held for sale Wilkie Creek Mine, which was adversely impacted by flooding in 2011.

Other

The fair value of our coal trading positions, before the application of margin, designated as cash flow hedges of future sales increased from a net asset of $22.4 million at December 31, 2011 to $185.1 million at September 30, 2012, due to favorable market price movements on our positions.

Outlook

Our near-term outlook is intended to coincide with the next 12 to 24 months, with subsequent periods addressed in our long-term outlook.

Near-Term Outlook

Near-term markets reflect a challenging environment due to declining global metallurgical and thermal coal prices and low U.S. natural gas prices, which have only recently begun to increase. Overall, the International Monetary Fund (IMF) estimates that global economic growth, as measured by GDP growth, has slowed compared to the prior year, muting growth of both global electricity generation and steel production. Supply demand fundamentals have softened recently in the Asia-Pacific region, but continue to show relative strength compared to Atlantic regions.

According to China Customs, China's net coal imports from January through August totaled 196 million tonnes, a 43% increase over the prior year. China coal-fueled electricity generation is up 1% from January through September 2012 over the corresponding prior year period according to the China National Energy Administration. According to the India Central Electricity Authority, year-over-year Indian coal-fueled electricity generation has increased 12% from January through September 2012 compared to 2011, and coal import growth has continued in 2012 led by rising thermal coal demand. Japan is increasing coal-fueled electricity generation due to high seaborne natural gas prices and reduced nuclear generation. European coal-fueled electricity generation is up 14% from January through September 2012 compared to 2011. Per the WSA, steel production in China increased approximately 2% through September 2012 compared with 2011, reflecting a continued trend of year-over-year growth, though at a reduced rate from that observed during the same period in 2011. Year-over-year steel production grew by less than 1% on a worldwide basis through September of 2012, with growth in Asia and the U.S. offset by reduced production from Europe.

In its October 2012 World Economic Outlook Update, the IMF lowered global economic activity estimates for 2012 and 2013. The IMF estimates global economic activity, as measured by GDP, will grow 3.3% in 2012 and 3.6% in 2013, led by China and India. China's GDP is projected to grow 7.8% and 8.2% in 2012 and 2013, respectively. India, the world's second fastest growing economy, is projected to grow 4.9% and 6.0% in 2012 and 2013, respectively.

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According to the WSA October 2012 Short Range Outlook, global steel use is expected to increase 2.1% in 2012, with China steel use expected to grow by 2.5%. Both of these estimates reflect a downward revision of projections released by the WSA in April of this year.

Softness in international steel markets has led to lower prices for metallurgical coal. Metallurgical coal prices for high quality hard coking coal and low volatile pulverized coal injections settled at approximately $170 and $125 per tonne, respectively, for quarterly contracts commencing October 2012. We are settling new contracts for fourth quarter 2012 metallurgical coal shipments largely in line with these recent settlements, as adjusted for quality differentials on delivered coal. We are targeting total 2012 metallurgical coal sales of approximately 13 to 14 million tons.

Similarly, softness in international demand for seaborne thermal coal originating from Newcastle, Australia has led to a decline in the October 2012 annual contract settlement to $97 per tonne from the April 2012 annual contract settlement of $115 per tonne. We are targeting 2012 Australian thermal exports of 11 to 12 million tons. Total Australia production for 2012 is targeted at 31 to 33 million tons.

In the U.S., the EIA in its October 2012 Short-Term Energy Outlook projects U.S. electricity generation from coal and natural gas to decline by 11% and increase by 22%, respectively, in 2012 compared to 2011. The EIA projects the price of natural gas to increase in 2013 compared to 2012 by 24% to an average of $3.35 per MMBtu. Consequently, the EIA also projects electricity generation from coal will rebound modestly in 2013 and increase by 5% over 2012, while still falling short of levels realized in 2011.

We are now targeting our 2012 U.S. volumes at 188 to 192 million tons with those volumes fully committed and priced. As of October 22, 2012, we had 15% to 20% of planned U.S. production unpriced for 2013 based on projected current year volumes.

In an effort to mitigate pressures from the challenging global coal market environment, we remain focused on cost containment activities and have recently implemented programs across our global platform to reduce our workforce and lower spending for outside services and contractors. We expect to begin realizing the benefit of these programs in the fourth quarter of 2012.

Despite these cost containment efforts, we may still encounter poor geologic conditions, lower third-party contract miner or brokerage performance, unforeseen equipment problems, transportation difficulties and other operating challenges that limit our ability to produce and sell our coal products at projected levels. To the extent we experience upward pressure on costs in excess of our ability to realize revenue increases, our operating margins would be negatively impacted. Reductions in the relative cost of other fuels, including natural gas, could impact the use of coal for electricity generation. See Cautionary Notice Regarding Forward-Looking Statements and Item 1A. “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2011 for additional considerations regarding our outlook.

Dodd-Frank Act - Derivatives Regulation. On July 21, 2010, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the Dodd-Frank Act) was enacted, which among other things, requires the Commodity Futures Trading Commission (CFTC) and the SEC to adopt new comprehensive regulations related to financial derivative transactions. Though the CFTC and SEC have finalized many definitions and ruling makings, they have yet to complete their efforts in this area and the full impact of the new regulatory regime is not yet known. We believe that we are eligible for the commercial end-user exception available under the Dodd-Frank Act and will need to be in full compliance with these regulations by the second quarter of 2013. We expect that the Dodd-Frank Act will primarily impact us through an increase in compliance and transaction costs associated with our corporate hedging and trading and brokerage activities. The legislation is not expected to have an impact on our trading strategies utilized to hedge or mitigate risk related to asset production and commercial activities.

European Union Derivatives Regulation. In October 2011, the European Commission adopted proposals to revise its directive on markets in financial instruments (MiFID) and to enact a new regulation on markets in financial instruments (MiFIR). These proposals, which are currently under negotiation by the European Commission, European Council and European Parliament, will likely impose additional regulation of financial derivatives transactions that may apply to our corporate hedging and trading and brokerage activities. While the ultimate impact of these proposals will not be known for some time, we expect that they will increase compliance and transaction costs associated with our hedging and our Trading and Brokerage activities.

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Minerals Resource Rent Tax. On March 29, 2012, Australia passed legislation creating a minerals resource rent tax (the MRRT) effective from July 1, 2012. The MRRT is a profits-based tax of our existing and future Australian coal projects at an effective tax rate of 22.5%. Under the MRRT, taxpayers are able to elect a market value asset starting base for existing projects which allows for the fair market value of the tenements to be deducted over the life of the mine as an allowance against MRRT. The market value allowance, and ultimately any future benefit, is subject to numerous uncertainties, including review and approval by the Australian Tax Office, realization only after other MRRT allowances provided under the law and estimates of long-term pricing and cost data necessary to estimate the future benefit and any MRRT liability. We have evaluated the provisions of the new tax and assessed recoverability of deferred tax assets and the valuation of liabilities associated with the implementation of the MRRT. As of September 30, 2012, we have recorded no net deferred tax asset related to the market value starting base.

Carbon Pricing Framework. The Australian government's carbon pricing framework commenced on July 1, 2012. The carbon price will initially be $23.00 Australian dollars per tonne of carbon dioxide equivalent emissions, escalated by 2.5% per year for inflation over a three year period. After June 30, 2015, the carbon price mechanism will transition to an emissions trading scheme. We believe that all of our Australian operations will be impacted by the fugitive emissions portion of the framework (defined as the methane and carbon dioxide which escapes into the atmosphere when coal is mined and gas is produced), which we estimate will initially average $2.00 Australian dollars per tonne of coal produced annually. Actual results will depend upon the volume of tonnes produced at each of our Australian mining locations, as the impact per tonne at our surface mines will generally be less than the impact per tonne at our underground mines. In addition, our Australian mines will be impacted by the phased reduction of the government's diesel fuel rebate to capture emissions from fuel combustion. Our North Goonyella, Wambo and Metropolitan mines have applied for a portion of the government's approximately $1.3 billion Australian dollars of transition benefits that would provide assistance based on historical emissions intensity data to the most emissions-intensive coal mines over a six-year period. Those sites received payments totaling $22.5 million in June related to this program of which $12.7 million was realized in the third quarter. We also may be eligible for a portion of the government's $70 million Australian dollars Coal Mining Abatement Technology Support Package over five years to support the development and deployment of technologies to reduce fugitive emissions from coal mines.

Queensland Royalty. In September 2012, the State of Queensland announced new royalty rates on coal prices. The royalty change went into effect on October 1, 2012 and raised the royalty payment to the State of Queensland on coal prices over $100 per tonne from 10% to 12.5% for pricing up to $150 per tonne and 15% on pricing over $150 per tonne. There was no change to the 7% rate for coal sold below $100 per tonne. The impact of these new royalty rates will depend upon the volume of tonnes produced at each of our Queensland mining locations and coal prices received on those tonnes. 

Cross-State Air Pollution Rule (CSAPR). On July 6, 2011, the U.S. Environmental Protection Agency (EPA) finalized CSAPR, which requires 28 states from Texas eastward (not including the New England states or Delaware) to significantly improve air quality by reducing power plant emissions that cross state lines and contribute to ozone and/or fine particle pollution in other states. The CSAPR is one of a number of significant regulations that the EPA has issued or expects to issue that will impose more stringent requirements relating to air, water and waste controls on electric generating units. Under the CSAPR, the first phase of the nitrogen oxide and sulfur dioxide emissions reductions would commence in 2012 with further reductions effective in 2014. In October 2011, the EPA proposed amendments to the CSAPR to increase emission budgets in ten states, including Texas, and ease limits on market-based compliance options. While CSAPR had an initial compliance deadline of January 1, 2012, the rule was challenged and on December 30, 2011, the U.S. Court of Appeals for the District of Columbia stayed CSAPR and advised that the EPA is expected to continue administering the Clean Air Interstate Rule (CAIR) until the pending challenges are resolved. The court vacated CSAPR on August 21, 2012, in a 2 to 1 decision, concluding that the rule was beyond the EPA's statutory authority. On October 5, 2012, the EPA petitioned for en banc review of that decision by the entire U.S. Court of Appeals for the District of Columbia Circuit.

Proposed New Source Performance Standards for Fossil Fuel-Fired Electricity Utility Generating Units. On April 13, 2012, the EPA published for comment proposed new source performance standards for emissions of carbon dioxide for new fossil fuel-fired electric utility generating units. If these standards are adopted as proposed, it is unlikely that any new coal-fired electric utility generating units could be constructed in the U.S. without the use of carbon capture and storage technologies. We believe that any final rules issued by the EPA in this area will be challenged.

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Mercury and Air Toxics Standards.On July 20, 2012, the EPA announced that it is reviewing technical information that is focused on pollution limits for new power plants under the Mercury and Air Toxics Standards (MATS), based on new information provided by industry stakeholders after the rule was finalized.  The EPA stated that it is reviewing this information to provide greater certainty for five planned future facilities, in Georgia, Kansas, Texas and Utah, that would be covered by the standards.  MATS, which was adopted by the EPA in December 2011, imposes maximum achievable control technology emission limits on hazardous air emissions from new and existing coal- and oil-fired electric generating plants, as well as revised new source performance standards for nitrogen oxides, sulfur dioxides and particulate matter from such plants.

Long-Term Outlook

Our long-term global outlook remains positive. According to the BP Statistical Review of World Energy 2012, coal has been the fastest growing major fuel in the world for the past decade. Wood Mackenzie projects that coal will overtake oil as the world's largest energy source in 2013. The International Energy Agency (IEA) estimates in its World Energy Outlook 2011, current policies scenario, that worldwide primary energy demand will grow 51% between 2009 and 2035. Demand for coal during this time period is projected to rise 65%, and the growth in global electricity generation from coal is expected to be greater than the growth in oil, natural gas, nuclear, hydro, biomass, geothermal and solar combined. China and India are expected to account for more than 75% of the coal-based primary energy demand growth projected from 2009 to 2035.

Under the current policies scenario, the IEA expects coal to retain its strong presence as a fuel for the power sector worldwide. Coal's share of the power generation mix was 47% in 2009. By 2035, the IEA estimates coal's fuel share of power generation to be 49% as it continues to have the largest share of worldwide electric power production. In the U.S., coal remains a significant fuel for electricity generation, but its share is expected to decline through 2035 due to competition from natural gas and renewables according to the EIA's 2012 Annual Energy Outlook. According to the EIA, overall U.S. coal consumption is expected to decline through 2015 before beginning a slight steady increase through 2035.

The IEA projects that global natural gas-fueled electricity generation will have a compound annual growth rate of 2.7%, from 4.3 trillion kilowatt hours in 2009 to 8.7 trillion kilowatt hours in 2035. The total amount of electricity generated from natural gas is expected to be approximately one-half the total for coal, even in 2035. Renewables are projected to comprise 23% of the 2035 fuel mix versus 19% in 2009. Nuclear power is expected to grow 50%, however its share of total generation is expected to fall from 13.5% to 10% between 2009 and 2035. The planned shutdown of nuclear power plants in Japan and Germany may impact these projections. Generation from liquid fuels is projected to decline an average of 2.1% annually to 1.5% of the 2035 generation mix.

We believe that Btu Conversion applications such as CTG and CTL plants represent an avenue for potential long-term industry growth. Several CTG and CTL facilities are currently under development in China and India.

We continue to support clean coal technology development toward the ultimate goal of near-zero emissions and we are pursuing multiple projects and partnerships in the U.S., China and Australia. Clean coal technology development in the U.S. has funding earmarked under the American Recovery and Reinvestment Act of 2009. In addition, the Interagency Task Force on Carbon Capture and Storage was formed to develop a comprehensive and coordinated federal strategy surrounding the commercial development of commercial carbon capture and storage projects. Our work in new or recently commercialized technologies could expose us to unanticipated risks, evolving legislation and uncertainty regarding the extent of future government support and funding.

Our long-term plans also include advancing projects to expand our presence in the Asia-Pacific region, some of which include sourcing coal to be sold through our Trading and Brokerage segment and partnerships to utilize our mining experience for joint mine development, such as projects we are exploring in Xinjiang, China and the Tavan Tolgoi project in the South Gobi region of Mongolia.

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Enactment of laws or passage of regulations regarding emissions from the combustion of coal by the U.S., some of its states or other countries, or other actions to limit such emissions, could result in electricity generators switching from coal to other fuel sources. The potential financial impact on us of future laws or regulations will depend upon the degree to which any such laws or regulations force electricity generators to diminish their reliance on coal as a fuel source. That, in turn, will depend on a number of factors, including the specific requirements imposed by any such laws or regulations, the time periods over which those laws or regulations would be phased in, the state of commercial development and deployment of CCS technologies and the alternative markets for coal. In view of the significant uncertainty surrounding each of these factors, it is not possible for us to reasonably predict the impact that any such laws or regulations may have on our results of operations, financial condition or cash flows.

Liquidity and Capital Resources

Capital Resources

Our primary sources of cash are that which is generated from the sale of our coal production to customers and our trading and brokerage activities. To a lesser extent, we also generate cash from the sale of non-strategic coal reserves and surface lands and, from time to time, the issuance of securities.

We follow a diversified investment approach for our cash and cash equivalents by maintaining such funds with a diversified portfolio of banks within our group of relationship banks in high quality, highly liquid investments with original maturities of three months or less, generally comprised of money market funds, term deposits and government securities. We monitor the amounts held with each bank on a daily basis and do not believe our cash and cash equivalents are exposed to any material risk of loss.

We hold cash balances within the U.S. and in several foreign locations around the world. As of September 30, 2012, approximately $250 million of our cash was held by U.S. entities, with the remaining balance held by foreign subsidiaries in predominantly U.S.-based accounts. A significant majority of the cash held by our foreign subsidiaries is denominated in U.S. dollars. This cash is generally used to support non-U.S. liquidity needs, including capital and operating expenditures in Australia and the foreign operations of our Trading and Brokerage segment. Under current law, earnings repatriated to the U.S. are subject to U.S. federal income tax, less applicable foreign tax credits. We have not provided deferred taxes on foreign earnings because such earnings are considered to be indefinitely reinvested outside of the U.S. Accordingly, we utilized a variety of tax planning and financing strategies with the objective of having our worldwide cash available in the locations where it is needed. When appropriate, we may access our foreign cash in a tax efficient manner. Where local regulations or other circumstances may limit an efficient intercompany transfer of amounts held outside of the U.S., we will continue to utilize those funds for local liquidity needs. We do not expect restrictions or potential taxes on the repatriation of amounts held outside the U.S. to have a material effect on our overall liquidity, financial condition or results of operations.

In addition to cash and cash equivalents, our liquidity includes available balances from our revolving credit facility (the Revolver) under our senior unsecured credit facility entered into in 2010 (the Credit Facility), accounts receivable securitization program and Australian bank overdraft facility. Available liquidity was approximately $2.2 billion as of September 30, 2012, which was substantially comprised of $1.4 billion available for borrowing under the Revolver (net of outstanding letters of credit of $143.8 million), cash and cash equivalents of approximately $0.6 billion and $153.1 million of available capacity from our accounts receivable securitization program.

Capital Requirements

Our primary uses of cash include the cash costs of coal production and sale, capital expenditures, coal reserve lease and royalty payments, debt service costs (including interest and principal), capital and operating lease payments, postretirement plans, take or pay obligations, past mining retirement obligations and the payment of dividends.

We expect our available liquidity and cash flows from operations will be sufficient to meet our anticipated capital requirements through 2013. We routinely monitor our current and expected capital requirements and capital market conditions to evaluate the use of alternative financing sources, which include our ability to offer and sell securities under our shelf registration statement and access to credit markets.

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Based on our current financial condition and credit relationships, we believe that we currently have the ability to access capital markets, if needed. Any adverse changes in our financial condition or liquidity or additional uncertainty in capital markets could negatively impact our ability to access such funds and, in turn, reduce the availability of our cash flow to fund discretionary spending, including capital expenditures for growth and development projects, acquisitions, share repurchases, dividend payments, contributions to our postretirement plans in excess of regulatory requirements and voluntary debt repayments.

Capital Expenditures. We expect aggregate capital expenditures for full year 2012 to total $1.0 to $1.1 billion. Our projection for 2012 represents a reduction from the range of $1.2 to $1.4 billion disclosed in our Annual Report on Form 10-K for the year ended December 31, 2011 in response to the impact of unfavorable changes in the global macroeconomic environment on global coal markets in the current year. Approximately $600 to $700 million of our aggregate capital expenditures target is allotted to growth projects that involve future mine development and the expansion, extension and technology modernization of certain existing mines, with much of the remaining allocated to sustaining capital expenditures for existing operations. Approximately 85% of our growth and expansion capital is targeted for various Australian projects focused on additional production volumes of seaborne metallurgical and thermal coal, with the remainder allocated to U.S. projects. Our 2012 capital expenditures have and will include spending associated with the conversion of our Wilpinjong and Millennium mines in Australia from contract mining to owner operations, which we anticipate will be complete in the first half of 2013. We generally fund our capital expenditures with cash generated from operations. Accordingly, we evaluate our capital project portfolio on an ongoing basis and believe we have the appropriate flexibility to adjust our growth capital spending as appropriate based on any material changes in our cash flows from operations and liquidity position. While we are completing several late-stage capital projects in Australia, we currently plan to defer certain new and early-stage growth and development projects across our global platform, and reassess the timing associated with those projects, in order to reduce our near-term capital requirements. As a result, we expect aggregate capital expenditures to fall below current year levels in 2013.

Total Indebtedness. We target our debt levels after considering a number of factors, including cash flow expectations, capital requirements, a target capital structure, the cost of capital and planned discretionary spending. Our total indebtedness as of September 30, 2012 and December 31, 2011, consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Term Loan	$	450.0	$	468.8
2011 Term Loan Facility	975.0		1,000.0
7.375% Senior Notes due November 2016	650.0		650.0
6.00% Senior Notes due November 2018	1,518.8		1,600.0
6.50% Senior Notes due September 2020	650.0		650.0
6.25% Senior Notes due November 2021	1,339.6		1,500.0
7.875% Senior Notes due November 2026	247.4		247.3
Convertible Junior Subordinated Debentures due December 2066	376.8		375.2
Capital lease obligations	111.6		122.8
Other	43.9		43.4
Total Debt	$	6,363.1	$	6,657.5

Certain of our long-term debt arrangements contain various administrative, reporting, legal and financial covenants. When in compliance with our financial covenants and customary default provisions, we are not restricted in our ability to pay dividends, sell assets and make redemptions or repurchase capital stock with proceeds received from the concurrent issue of capital stock or indebtedness. As of September 30, 2012, we were in compliance with all such covenants.

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During the second quarter of 2012, we repurchased $81.2 million and $160.4 million in aggregate principal amount of our 6.00% and 6.25% Senior Notes due 2018 and 2021, respectively, with existing cash on hand. These repurchases reflect our current focus on balancing our capital structure through deleveraging. We recognized a net loss of $2.8 million associated with these repurchases, which was comprised of $3.4 million of expense related to the write-off of deferred financing costs and a gain of $0.6 million as the repurchases were made below par value. The loss is classified in "Interest expense" in the unaudited condensed consolidated statement of operations for the nine months ended September 30, 2012. As market conditions warrant, we may from time to time repurchase debt securities issued by us, in privately negotiated or open market transactions, by tender offer or otherwise.

Share Repurchases. During the second quarter of 2012, we utilized existing cash on hand to repurchase 4.2 million shares of our outstanding common stock for $99.9 million pursuant to the authority of our Chairman and Chief Executive Officer, substantially exhausting the associated authorization limit. As of September 30, 2012, remaining capacity under our publicly-announced share repurchase program authorized by our Board of Directors was $700.4 million.

Margin. As part of our trading and brokerage activities, we may be eligible to receive or required to post margin with an exchange or certain of our counterparties. The amount and timing of margin received or posted can vary with the volume of trades and market price volatility. Total net margin held at September 30, 2012 and December 31, 2011 was $163.6 million and $18.1 million, respectively. For the nine months ended September 30, 2012 and 2011, net cash inflows from margin were $145.5 million. $46.8 million, respectively.

There were no other material changes to our capital resources or capital requirements from the information provided in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2011.

Contractual Obligations

In the second quarter of 2012, we were named by the U.S. Department of the Interior, Bureau of Land Management (BLM) as the winning bidder for control of approximately 1.1 billion tons of federal coal reserves adjacent to our North Antelope Rochelle Mine in the Southern Powder River Basin of Wyoming, with a weighted average bid price of approximately $1.10 per mineable ton. Consequently, we made aggregate payments of $247.9 million in the nine months ended September 30, 2012 pursuant to the two associated federal coal leases, with remaining annual payments of $247.9 million due in each of the next four years.

In July 2011, we were named by the BLM as the winning bidder for control of approximately 220 million tons of federal coal reserves adjacent to our Caballo Mine in the Powder River Basin at a bid price of $0.95 per mineable ton, with payments of $42.1 million due annually in each of the years from 2011 through 2015 pursuant to the associated federal coal lease (the Belle Ayr North Lease). Similarly, in September 2011, a subsidiary of Alpha Natural Resources, Inc. (Alpha) was named by the BLM as the winning bidder for control of approximately 130 million tons of federal coal reserves in the Powder River Basin at a bid price of $1.10 per mineable ton, with contractual payments of $28.6 million due annually in each of the years from 2011 through 2015 under the associated federal coal lease (the Caballo West Lease). In July 2012, we executed a lease exchange agreement with Alpha through the BLM whereby we agreed to sell, assign and transfer our interest in the Belle Ayr North Lease in exchange for (i) Alpha's interest in the Caballo West Lease, (ii) reimbursement of $13.5 million for the difference in the related federal coal lease payments made by each party in 2011 and (iii) five annual true up payments of $3.9 million for the excess of the $1.10 bid price per mineable ton assumed under the Caballo West Lease over the transferred lease. The reimbursement payment and first true up payment were received from Alpha at closing. The four remaining annual true up payments are due from Alpha on November 1 in each of the years from 2012 through 2015.

In the third quarter of 2012, we entered into long-term agreements with Kinder Morgan Energy Partners L.P. (Kinder Morgan) to secure and expand the Gulf Coast export platform of our Western U.S. Mining and Midwestern U.S. Mining coal products. Under the multi-terminal agreements, we gain additional access to Kinder Morgan's Deepwater Terminal and Houston Bulk Terminal near Houston, Texas and International Marine Terminal in Myrtle Grove, Louisiana through 2021 and 2020, respectively. The agreements are expected to increase our annual Gulf Coast coal export capacity by approximately 2 million and 4 million tons in 2013 and 2014, respectively, and 5 million to 7 million tons in each of the years from 2015 through 2020. These agreements are subject to customary minimum throughput obligations during those periods at commercially reasonable coal handling, blending and storage rates.

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There were no other material changes to our contractual obligations from the information provided in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2011.

Historical Cash Flows

The following table summarizes our cash flows for the nine months ended September 30, 2012 and 2011, as reported in the accompanying unaudited condensed consolidated financial statements:

	Nine Months Ended						Increase (Decrease)
	September 30,						to cash and cash equivalents
	2012			2011			$			%
	(Dollars in millions)
Net cash provided by operating activities	$	1,291.5		$	1,190.5		$	101.0		8.5	%
Net cash used in investing activities	(921.8		)	(756.8		)	(165.0		)	(21.8	)%
Net cash used in financing activities	(520.8		)	(327.3		)	(193.5		)	(59.1	)%
Net change in cash and cash equivalents	(151.1		)	106.4			(257.5		)	242.0	%
Cash and cash equivalents at beginning of period	799.1			1,295.2			(496.1		)	(38.3	)%
Cash and cash equivalents at end of period	$	648.0		$	1,401.6		$	(753.6	)	(53.8	)%

Operating Activities. The increase in net cash provided by operating activities for the nine months ended September 30, 2012 compared to the prior year was driven by the following:

• Strong accounts receivable collections in 2012 compared to 2011;

• The timing of disbursements associated with our accounts payable and certain accrued liabilities; and

• Higher current year cash inflows from our Trading and Brokerage activities, primarily due to an increase in the amount of net margin held; partially offset by

• Lower Adjusted EBITDA;

• Lower utilization of our accounts receivable securitization compared to the prior year period; and

• Higher inventory builds corresponding with the impact of the macroeconomic environment on global demand.

Investing Activities. The increase in net cash used in investing activities for the nine months ended September 30, 2012 compared with the prior year was due to:

• Higher current year capital spending of $178.7 million, much of which is associated with our organic growth and development projects in Australia;

• Higher federal coal lease expenditures associated with our Western U.S. Mining operations of $205.5 million; and

• Increased net outflows associated with joint ventures and related parties related to the PEA-PCI acquisition; partially offset by

• Greater proceeds from the disposal of assets of $81.4 million driven by current year collections of $34.2 million on a long-term receivable related to a prior sell down of the Codrilla Mine Project by PEA-PCI into the Coppabella Moorvale Joint Venture prior to our acquisition of PEA-PCI in 2011, $17.4 million in aggregate reimbursement and true up payments received in the third quarter of 2012 related to our federal coal lease swap executed with Alpha and $27.2 million in proceeds received in the third quarter of 2012 from sale-leaseback transactions on operating equipment at PEA-PCI;

• Prior year investments in shares of PEA-PCI, formerly Macarthur Coal Limited, of $45.5 million leading up to the PEA-PCI acquisition; and

• Lower expenditures of $20.4 million related to our involvement in Prairie State as its construction nears completion and commercial operations commence.

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Financing Activities. The increase in cash used in financing activities for the nine months ended September 30, 2012 compared with the prior year was a result of the following:

• Current year common stock repurchases of $99.9 million;

• Higher long-term debt payments of $57.3 million as a result of an increase in debt repurchases over the prior year period, as well as higher overall debt levels due to the PEA-PCI acquisition; and

• Payments of $49.8 million made in the second quarter of 2012 associated with our acquisition of the remaining noncontrolling interest in MCG Coal Holdings Pty Ltd.

Off-Balance Sheet Risks

In the normal course of business, we are a party to certain off-balance sheet arrangements. These arrangements include guarantees, indemnifications, financial instruments with off-balance sheet risk, such as bank letters of credit, bank guarantees and surety bonds, and our accounts receivable securitization program. Assets and liabilities related to these arrangements are not reflected in our condensed consolidated balance sheets and we do not expect any material adverse effects on our financial condition, results of operations or cash flows to result from these off-balance sheet arrangements.

Accounts Receivable Securitization. We have an accounts receivable securitization program (securitization program) with a maximum capacity of $275.0 million through a wholly owned, bankruptcy-remote subsidiary (Seller). At September 30, 2012, we had $153.1 million remaining capacity available under our securitization program. Under the securitization program, we contribute trade receivables of most of our U.S. subsidiaries on a revolving basis to the Seller, which then sells the receivables in their entirety to a consortium of unaffiliated asset-backed commercial paper conduits (the Conduits). After the sale, we, as servicer of the assets, collect the receivables on behalf of the Conduits for a nominal servicing fee. We utilize proceeds from the sale of our accounts receivable as an alternative to short-term borrowings under the Revolver portion of our Credit Facility, effectively managing our overall borrowing costs and providing an additional source of working capital. The securitization program extends to May 2013, while the letter of credit commitment that supports the commercial paper facility underlying the securitization program must be renewed annually.

The Seller is a separate legal entity whose assets are available first and foremost to satisfy the claims of its creditors. Of the receivables sold to the Conduits, a portion of the amount due to the Seller is deferred until the ultimate collection of the underlying receivables. During the nine months ended September 30, 2012, we received total consideration of $3,210.2 million related to accounts receivable sold under the securitization program, including $1,973.7 million of cash up front from the sale of the receivables, an additional $874.6 million of cash upon the collection of the underlying receivables and $362.0 million that had not been collected at September 30, 2012 and was recorded at carrying value, which approximates fair value. The reduction in accounts receivable as a result of securitization activity with the Conduits was $100.0 million and $150.0 million at September 30, 2012 and December 31, 2011, respectively.

Securitization activity has been reflected in the unaudited condensed consolidated statements of cash flows as an operating activity because cash received from the Conduits upon the sale of receivables, as well as cash received from the Conduits upon the ultimate collection of receivables, are not subject to significantly different risks given the short-term nature of our trade receivables. We recorded expense associated with securitization transactions of $0.5 million and $0.4 million for the three months ended September 30, 2012 and 2011, respectively, and $1.4 million and $1.5 million for the nine months ended September 30, 2012 and 2011, respectively.

Patriot Bankruptcy. On October 31, 2007, we spun-off companies that constituted portions of our former Eastern U.S. Mining operations business segment to form Patriot Coal Corporation (Patriot). The spin-off included eight company-operated mines, two majority-owned joint venture mines and numerous contractor-operated mines serviced by eight coal preparation facilities along, with 1.2 billion tons of proven and probable coal reserves. On July 9, 2012, Patriot and certain of its wholly owned subsidiaries filed voluntary petitions for reorganization under Chapter 11 of the U.S. Code in the U.S. Bankruptcy Court for the Southern District of New York.

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We believe that our only material exposure to the bankruptcy of Patriot relates to up to $150 million in possible federal and state black lung occupational disease liabilities. As Patriot noted in its Annual Report on Form 10-K/A for the year ended December 31, 2011, it has posted $15 million in collateral with the U.S. Department of Labor (DOL) in exchange for the right to self-insure its liabilities under the Federal Coal Mine Health and Safety Act of 1969 (Black Lung Act). If Patriot is unable to meet its black lung liability obligations, we believe that the DOL will first look to this collateral for payment. The Black Lung Act allows the DOL to seek recovery from other potentially liable operators as well. We may be considered a potentially liable operator for purposes of the Black Lung Act with respect to the black lung liabilities of Patriot at the time of the spin-off.

We also have a small number of commercial arrangements with Patriot and believe that our potential exposure under these agreements will not have a material adverse effect on our consolidated results of operations, financial condition or cash flows.

On October 23, 2012, eight individual plaintiffs and the United Mine Workers of America filed a putative class action lawsuit in the U.S. District Court for the Southern District of West Virginia against Peabody Holding Company, LLC, Peabody Energy Corporation and an unrelated coal company.  The lawsuit seeks to have the court obligate the defendants to maintain certain Patriot benefit plans at their current levels and to find the defendants actions in violation of the Employee Retirement Income Security Act of 1974.  We believe that the lawsuit is without merit and will vigorously defend against it.

Other Off-Balance Sheet Arrangements. From time to time, we enter into coal off-take agreements with counterparties where, as a part of the arrangements, we may provide certain financial guarantees on behalf of the counterparties. To mitigate the associated risk, we place liens on the counterparties' production equipment or require performance bonds. As of September 30, 2012, we had been released of all guarantees relating to such agreements, which had amounted to $10.0 million as of the end of the prior quarter.

Bilateral Cash Collateralization Facilities. As of December 31, 2011, we used bilateral cash collateralization agreements whereby we posted an aggregate of $79.7 million in cash in lieu of issuing letters of credit available under the Credit Facility to support our maximum reimbursement obligation associated with our involvement in Dominion Terminal Associates and an agreement with the Pension Benefit Guaranty Corporation. Such collateral was considered readily available given our ability to substitute the amount posted with letters of credit at any time and classified within "Cash and cash equivalents" in our condensed consolidated balance sheet accordingly. In the second quarter of 2012, we terminated both agreements and replaced the previously posted cash collateral with letters of credit under the Credit Facility.

See Note 15 to our unaudited condensed consolidated financial statements for a discussion of our guarantees.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition, results of operations, liquidity and capital resources is based upon our financial statements, which have been prepared in accordance with U.S. GAAP. We are also required under U.S. GAAP to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities. We evaluate our estimates on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.

Our critical accounting policies are discussed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2011. Our critical accounting policies remain unchanged at September 30, 2012.

Newly Adopted Accounting Standards and Accounting Standards Not Yet Implemented

See Note 2 to our unaudited condensed consolidated financial statements for a discussion of newly adopted accounting standards and accounting standards not yet implemented.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk.

There have been no material changes in market risk from the information provided in Item 7A. “Quantitative and Qualitative Disclosures About Market Risk” of our Annual Report on Form 10-K for the year ended December 31, 2011.

Item 4. Controls and Procedures.

Our disclosure controls and procedures are designed to, among other things, provide reasonable assurance that material information, both financial and non-financial, and other information required under the securities laws to be disclosed is accumulated and communicated to senior management, including our principal executive and financial officers, on a timely basis. Our Chief Executive Officer and Chief Financial Officer have evaluated our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of September 30, 2012, and concluded that such controls and procedures are effective to provide reasonable assurance that the desired control objectives were achieved.

Additionally, there have been no changes to our internal control over financial reporting during the most recent fiscal quarter that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II - OTHER INFORMATION

Item 1. Legal Proceedings.

See Note 16 to the unaudited condensed consolidated financial statements included in Part I, Item 1. "Financial Information" of this report relating to certain legal proceedings, which information is incorporated by reference herein.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

On October 24, 2008, we announced that our Board of Directors approved an amendment to the share repurchase program authorizing up to $1 billion of the then outstanding shares of our common stock (Repurchase Program). Repurchases may be made from time to time based on an evaluation of our outlook and general business conditions, as well as alternative investment and debt repayment options. The Repurchase Program does not have an expiration date and may be discontinued at any time. Through September 30, 2012, we have repurchased a total of 7.7 million shares under the Repurchase Program at a cost of $299.6 million ($199.8 million and $99.8 million in 2008 and 2006, respectively), leaving $700.4 million available for share repurchases under the Repurchase Program.

Our Chairman and Chief Executive Officer has the authority to direct the repurchase of up to $100 million of our common stock outside the Repurchase Program. During the second quarter of 2012, we repurchased $99.9 million, or 4.2 million shares, of our outstanding common stock pursuant to this program, substantially exhausting the associated authorization limit.

The following table summarizes all share repurchases for the three months ended September 30, 2012:

Period	Total Number of Shares Purchased(1)	Average Price per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Maximum Dollar Value that May Yet Be Used to Repurchase Shares Under the Publicly Announced Program (In millions)
July 1 through July 31, 2012	1,530	$	24.52	—	$	700.4
August 1 through August 31, 2012	2,434	21.04		—	700.4
September 1 through September 30, 2012	8,531	25.61		—	700.4
Total	12,495	$	24.59	—

⁽¹⁾  Represents shares withheld to cover the withholding taxes upon the vesting of restricted stock, which are not a part of the Repurchase Program.

62

Item 4. Mine Safety Disclosures.

Safety is a core value that is integrated into all areas of our business. Our goal is to provide a workplace that is incident free. We believe that it is our responsibility to employees to provide a safe and healthy work environment. We seek to implement this goal by: training employees in safe work practices; openly communicating with employees; establishing, following and improving safety standards; involving employees in safety processes and recording, reporting and investigating accidents, incidents and losses to avoid recurrence. As part of our training, we collaborate with the Mine Safety and Health Administration (MSHA or the Administration) and other government agencies to identify and test emerging safety technologies. We also believe personal accountability is key; every employee commits to our safety goals and governing principles. Managers, frontline supervisors and employees are held accountable for their safety and the safety of other employees.

We also partner with other companies and certain governmental agencies to pursue new technologies that have the potential to improve our safety performance and provide better safety protection for employees. We are testing a proximity detection system at a section of one of our mines, which is designed to automatically stop mining equipment if a person is detected within the operating range of a continuous miner or coal hauler. The proximity detection system has been approved by MSHA and we have the ability to incorporate the associated technology into other operating sites prospectively once testing is successfully completed.

In April 2012, we announced our endorsement and participation in CORESafety, a new safety and health management system developed by member companies of the National Mining Association for the U.S. mining industry. CORESafety is an approach to mining safety and health to prevent accidents before they happen using a management system that involves leadership, management and assurance. Its objective is to have zero fatalities and a 50% reduction in mining's injury rate within five years.

The incidence rate, which is monitored through our safety tracking system, is a measure of safety performance which represents the number of injuries that occurred for each 200,000 employee hours worked. Accordingly, it is computed as the number of injury occurrences, MSHA reportable injury degree codes 1 through 6, divided by the number employee hours worked and multiplied by 200,000 [(number of injury occurrences ÷ number of employee hours worked) x 200,000]. Since MSHA is a branch of the U.S. Department of Labor, its jurisdiction applies only to our U.S. mines. Nonetheless, we also track incidence rates for our Australian mines in order to measure safety performance on a consistent basis across our global mining operations.

For the U.S., the most comparable industry measure with which to compare our safety performance is the all incidence rate for operators at all U.S. bituminous coal mines, excluding the impact of office workers, from MSHA's periodic Mine Injury and Worktime report (All Incidence Rate). Historical incidence rates may be adjusted over time to reflect the final resolution of incidents by MSHA. The impact of these adjustments, which has not historically resulted in significant changes to the results originally reported, is reflected retrospectively in the MSHA database. Similarly, our reported incidence rates are adjusted retrospectively to reflect the final resolution of the underlying incidents, when applicable. However, the comparable All Incidence Rates disclosed below reflect those listed in the applicable MSHA Mine Injury and Worktime report when published because retrospectively adjusted All Incidence Rates are not issued by MSHA for interim periods.

The following table reflects our incidence rates (as of November 6, 2012):

	Nine Months Ended September 30,
	2012	2011
U.S.(1)	1.29	1.41
Australia(1)	2.71	2.66
Total Peabody Energy Corporation(1)	1.97	1.89

⁽¹⁾ Results for the nine months ended September 30, 2011 exclude PEA-PCI, previously Macarthur Coal Limited. Results for all periods presented include our Air Quality Mine and Wilkie Creek Mine, which were previously components of our Midwestern U.S. Mining and Australian Mining segments, respectively, and classified as discontinued operations as of September 30, 2012.

As of November 6, 2012, MSHA's Mine Injury and Worktime Operators report for the nine months ended September 30, 2012 has not been published. The All Incidence Rate for the six months ended June 30, 2012 was 3.46. The All Incidence Rate for the nine months ended September 30, 2011 was 3.71.

63

We monitor MSHA compliance using violations per inspection day (in the U.S. only), which is calculated as the total count of violations per five hour MSHA inspector day. Similar to historical incidence rates, historical violations per inspection day may be adjusted over time to reflect the final resolution of the underlying matters. For the nine months ended September 30, 2012 and 2011, our violations per inspection day were 0.84 and 0.82, respectively.

The information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Act and Item 104 of Regulation S-K is included in Exhibit 95 to this Quarterly Report on Form 10-Q.

Item 6. Exhibits.

See Exhibit Index at page 66 of this report.

64

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		PEABODY ENERGY CORPORATION
Date:	November 7, 2012	By:	/s/ MICHAEL C. CREWS
			Michael C. Crews
			Executive Vice President and Chief Financial Officer (On behalf of the registrant and as Principal Financial Officer)

65

EXHIBIT INDEX

The exhibits below are numbered in accordance with the Exhibit Table of Item 601 of Regulation S-K.

Exhibit No.	Description of Exhibit
3.1	Third Amended and Restated Certificate of Incorporation of the Registrant, as amended (Incorporated by reference to Exhibit 3.1 of the Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2008).
3.2	Amended and Restated By-Laws of the Registrant (Incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K filed on September 16, 2008).
10.1	Separation and General Release Agreement entered into on July 3, 2012 by and between Richard A. Navarre and Peabody Energy Corporation (Incorporated by reference to Exhibit 10.1 of the Registrant's Current Report on Form 8-K filed July 6, 2012).
10.2	Consulting Agreement dated August 27, 2012 between Peabody Energy Corporation and Richard A. Navarre (Incorporated by reference to Exhibit 10.1 of the Registrant's Current Report on Form 8-K filed August 30, 2012).
10.3*	Fifth Amendment to Third Amended and Restated Receivables Purchase Agreement dated as of October 24, 2011, by and among P&L Receivables Company, LLC, Peabody Energy Corporation, the various Sub-Servicers listed on the signature pages thereto, all Conduit Purchasers listed on the signature pages thereto, all Purchaser Agents listed on the signature pages thereto, all Related Committed Purchasers listed on the signature pages thereto, all LC Participants listed on the signature pages thereto, and PNC Bank, National Association, as Administrator and as LC Bank.
10.4*	Sixth Amendment to Third Amended and Restated Receivables Purchase Agreement dated as of May 8, 2012, by and among P&L Receivables Company, LLC, Peabody Energy Corporation, the various Sub-Servicers listed on the signature pages thereto, all Conduit Purchasers listed on the signature pages thereto, all Purchaser Agents listed on the signature pages thereto, all Related Committed Purchasers listed on the signature pages thereto, all LC Participants listed on the signature pages thereto, and PNC Bank, National Association, as Administrator and as LC Bank.
10.5*	Seventh Amendment to Third Amended and Restated Receivables Purchase Agreement dated as of September 26, 2012, by and among P&L Receivables Company, LLC, Peabody Energy Corporation, the various Sub-Servicers listed on the signature pages thereto, all Conduit Purchasers listed on the signature pages thereto, all Purchaser Agents listed on the signature pages thereto, all Related Committed Purchasers listed on the signature pages thereto, all LC Participants listed on the signature pages thereto, and PNC Bank, National Association, as Administrator and as LC Bank.
31.1*	Certification of periodic financial report by Peabody Energy Corporation’s Chief Executive Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of periodic financial report by Peabody Energy Corporation’s Chief Financial Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as amended pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of periodic financial report pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, by Peabody Energy Corporation’s Chief Executive Officer.
32.2*	Certification of periodic financial report pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, by Peabody Energy Corporation’s Chief Financial Officer.
95*	Mine Safety Disclosure required by Item 104 of Regulation S-K.
101*	Interactive Data File (Form 10-Q for the quarterly period ended September 30, 2012 filed in XBRL). The financial information contained in the XBRL-related documents is “unaudited” and “unreviewed.”

* Filed herewith.

66

EX-10.3

Exhibit 10.3

FIFTH AMENDMENT TO THE THIRD AMENDED AND RESTATED

RECEIVABLES PURCHASE AGREEMENT

This FIFTH AMENDMENT TO THE THIRD AMENDED AND RESTATED RECEIVABLES PURCHASE AGREEMENT (this “Amendment”), dated as of October 24, 2011, by and among the following parties:

(i) P&L RECEIVABLES COMPANY, LLC, a Delaware limited liability company, as Seller;

(ii) Peabody energy corporation, A Delaware corporation, as Servicer;

(iii) the various Persons identified on the signature pages hereto as Sub-Servicers;

(iv) MARKET STREET FUNDING LLC (“Market Street”), as a Conduit Purchaser and as a Related Committed Purchaser;

(v) PNC BANK, NATIONAL ASSOCIATION, as Purchaser Agent for Market Street's Purchaser Group, as LC Bank, as an LC Participant and as Administrator;

(vi) ATLANTIC ASSET SECURITIZATION LLC (“Atlantic”), as a Conduit Purchaser; and

(vii) CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK NEW YORK BRANCH, as a Related Committed Purchaser, as Purchaser Agent for Atlantic's Purchase Group and as an LC Participant.

BACKGROUND

1.The parties hereto are parties to that certain Third Amended and Restated Receivables Purchase Agreement, dated as of January 25, 2010 (as amended, amended and restated, supplemented or otherwise modified through the date hereof, the “Receivables Purchase Agreement”).

2.The parties hereto desire to amend and supplement the Receivables Purchase Agreement and to provide for the repayment of Atlantic's outstanding Capital, in each case, on the terms and subject to the conditions set forth herein.

3.Concurrently herewith, the Fee Letters for each of Market Street's and Atlantic's Purchaser Groups are being amended and restated (such amended and restated Fee Letters, the “A&R Fee Letters”).

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

1

SECTION 1.Defined Terms. Capitalized terms used but not otherwise defined herein (including, without limitation, capitalized terms used in the above preamble and background section) have the respective meanings set forth in the Receivables Purchase Agreement defined below. As used herein, the following terms have the respective meanings set forth below:

“Adjusted Pro Rata Share” means, with respect to any LC Participant at any time, a fraction, expressed as a percentage, (a) the numerator of which is LC Funding Exposure of such LC Participant, and (b) the denominator of which is the LC Participation Amount.

“Exposure” means, with respect to any Purchaser Group at any time, an amount determined pursuant to the following formula:

EXP = PRS x (AC + LCPA)

where:

AC=the Aggregate Capital;

EXP=the Exposure of such Purchaser Group;

LCPA=the LC Participation Amount; and

PRS =such LC Participant's Pro Rata Share.

“LC Funding Exposure” means, with respect to any LC Participant at any time, the lesser of (a) the LC Participation Amount and (b) an amount determined pursuant to the following formula, but not less than zero ($0):

LCFE=(PRS x LCPA) - {C - (AC x PRS)}

where:

AC=the Aggregate Capital;

C =the aggregate Capital held by all Purchasers in such LC Participant's Purchaser Group;

LCFE =the LC Funding Exposure of such LC Participant's

Purchaser Group;

LCPA=the LC Participation Amount; and

PRS =such LC Participant's Pro Rata Share.

“LC Reimbursement Investment” means (a) any Investment deemed requested by the Seller pursuant to Section 1.1(b) or 1.16(b) of the Receivables Purchase Agreement and (b) any amount required to be funded by an LC Participant to the LC Bank pursuant to Sections 1.4(f), 1.16(c) or 1.17(b) of the Receivables Purchase Agreement (including, without limitation, in respect of any participation advance under the Receivables Purchase Agreement).

2

“Market Street Funded Percentage” means a fraction, expressed as a percentage, (a) the numerator of which is the aggregate Capital held by Market Street's Purchaser Group, and (b) the denominator of which is the aggregate outstanding Capital held by all Purchaser Groups.

“Ordinary Investment” means any Investment requested by the Seller in accordance with Section 1.2(a) of the Receivables Purchase Agreement. For the avoidance of doubt, no LC Reimbursement Investment shall constitute an “Ordinary Investment”.

SECTION 2.Certain Amendments to the Receivables Purchase Agreement. Notwithstanding the requirement set forth in the Receivables Purchase Agreement that all Investments shall be made and funded by the Purchasers of the various Purchaser Groups ratably based on the aggregate Commitments of the Related Committed Purchasers in their respective Purchaser Groups or based upon the respective Pro Rata Shares of the LC Participants, the parties hereto agree that unless and until otherwise agreed to in writing by the parties hereto:

(a)Each Ordinary Investment to be made under the Receivables Purchase Agreement on or after the date hereof shall be made and funded entirely by the Purchasers in Market Street's Purchaser Group, rather than by the Purchasers in Atlantic's Purchaser Group, until the Group Capital of Market Street's Purchaser Group equals the Group Commitment of Market Street's Purchaser Group.

(b)Any Ordinary Investment or portion thereof to be made under the Receivables Purchase Agreement at any time when the Group Capital of Market Street's Purchaser Group equals the Group Commitment of Market Street's Purchaser Group shall be made and funded by the Purchasers in Atlantic's Purchaser Group.

(c)In the event that any LC Reimbursement Investment is required to be made by the Purchasers under the Receivables Purchase Agreement, such LC Reimbursement Investment shall be funded as follows:

(i)if the Market Street Funded Percentage at such time exceeds the Percentage of Market Street's Purchaser Group, such LC Reimbursement Investment shall be funded entirely by the Purchasers in Atlantic's Purchaser Group, rather than by the Purchasers in Market Street's Purchaser Group, until the Market Street Funded Percentage equals the Percentage of Market Street's Purchaser Group; and

(ii)if the Market Street Funded Percentage at such time equals the Percentage of Market Street's Purchaser Group, such LC Reimbursement Investment or portion thereof shall be funded by Market Street's and Atlantic's respective Purchaser Groups ratably in accordance with the terms of the Receivables Purchase Agreement (as in effect prior to giving effect to this Amendment) based on the aggregate Commitments of the Related Committed Purchasers in their respective Purchaser Groups or based upon the respective Pro Rata Shares of the LC Participants, as the case may be.

(d)The reference to the term “Pro Rata Share” in sub-clause (i)(B) of the proviso to Section 1.1(a) of the Receivables Purchase Agreement shall be deemed to be a reference to the term “Adjusted Pro Rata Share” as defined in this Amendment. In addition and notwithstanding Section 1.16(a) of the Receivables Purchase Agreement, at any time of determination, each LC Participant's participation in each Letter of Credit and each drawing thereunder shall be an amount equal to such LC Participant's Adjusted Pro Rata Share at such time of the face amount of such Letter of Credit and the amount of such drawing, respectively.

3

(e)For the avoidance of doubt, the references to “Pro Rata Share” in Section 4.7(h) of the Receivables Purchase Agreement and in the definitions of “Majority LC Participants” and “Required LC Participants” set forth in Exhibit I to the Receivables Purchase Agreement shall remain references to “Pro Rata Share” and are not amended or otherwise modified hereby.

(f)For the avoidance of doubt, (i) the foregoing shall not be construed to require any Purchaser to make or fund any Investment unless all the conditions precedent therefor set forth in the Receivables Purchase Agreement have been satisfied, (ii) no Purchaser's Commitment is being increased or reduced hereby, (iii) no Purchaser Group's Group Commitment is being increased or reduced hereby and (iv) no Purchaser shall be required to make or fund any Investment or portion thereof that would cause (x) such Purchaser's aggregate outstanding Capital to exceed its Commitment or (y) the Exposure of such Purchaser's Purchaser Group to exceed the Group Commitment of such Purchaser Group.

SECTION 3.Non-Ratable Repayment of Atlantic's Capital; Investment by Market Street.

(a)As of the date hereof and prior to giving effect to this Amendment, Atlantic's aggregate outstanding Capital is $9,090,909 (the “Atlantic Capital”), and all the Capital being funded by the Purchasers in Atlantic's Purchaser Group is being funded by Atlantic.

(b)The Seller shall repay the Atlantic Capital in full on the date hereof, and the parties hereto agree that this Amendment shall constitute an Investment Notice pursuant to Section 1.2(a) of the Receivables Purchase Agreement notwithstanding that such Investment Notice is not being delivered in the form of Annex B to the Receivables Purchase Agreement. The Seller hereby requests that the Purchasers in Market Street's Purchaser Group make an Investment on the date hereof in an amount of Capital equal to the Atlantic Capital (such Investment, the “Market Street Investment”). For administrative convenience, the Seller hereby requests that the Purchasers in Market Street's Purchaser Group fund the Capital of the Market Street investment by wire transfer to Atlantic's account specified below, and the amount so transferred at the Seller's direction shall be applied as a repayment by the Seller of the Atlantic Capital. Atlantic's account for such purpose is the following:

Bank:Credit Agricole CIB New York Branch

ABA:026008073

Account #:01-25680-0001-00-001

Attention:Kristen Kuo

Reference: P&L Receivables Company, LLC

(c)All unpaid Discount and Fees that accrued prior to the date hereof on or with respect to the Atlantic Capital shall be paid on the Monthly Settlement Date first occurring after the date hereof in accordance with the terms of the Receivables Purchase Agreement and the other Transaction Documents.

(d)After giving effect to the foregoing repayment of the Atlantic Capital and funding of the Market Street Investment:

4

(i)the Aggregate Capital shall be $25,000,000;

(ii)the aggregate outstanding Capital funded by Market Street shall be $25,000,000;

(iii)the aggregate outstanding Capital funded by the Purchasers in Atlantic's Purchaser Group shall be zero ($0);

(iv)the LC Participation Amount shall be $61,557,343;

(v)the LC Funding Exposure of the LC Participant in Market Street's Purchaser Group shall be $30,081,946;

(vi)the LC Funding Exposure of the LC Participant in Atlantic's purchaser Group shall be $31,475,397;

(vii)the Adjusted Pro Rata Share of the LC Participant in Market Street's Purchaser Group shall be 48.87%;

(viii)the Adjusted Pro Rata Share of the LC Participant in Atlantic's Purchaser Group shall be 51.13%;

(ix)the Exposure of Market Street's Purchaser Group shall be $55,081,946; and

(x)the Exposure of Atlantic's Purchaser Group shall be $31,475,397.

(e)Notwithstanding the foregoing, and for the avoidance of doubt, no Purchaser in Market Street's Purchaser Group shall be required to make or fund the Market Street Investment unless all the conditions precedent thereto set forth in the Receivables Purchaser Agreement (including, without limitation, those set forth in Section 2 of Exhibit II to the Receivables Purchase Agreement) have been satisfied; provided, however, that he provision of Section 1.2(a) of the Receivables Purchase Agreement requiring that each Investment Notice be delivered two Business Days prior to such Investment is hereby waived solely with respect to the Market Street Investment.

Section 4.Additional Amendment to the Receivables Purchase Agreement. Section 1.4(h) of the Receivables Purchase Agreement is hereby amended by replacing the last sentence of such Section in its entirety with the following:

Notwithstanding the foregoing and for the avoidance of doubt, each Related Committed Purchaser's and LC Participant's obligation to fund any such Investment or drawing pursuant to this Section 1.4(h) shall be subject in all respects to the limitations set forth in the proviso to Section 1.1(a).

SECTION 5.Representations and Warranties. Each of the Seller, the Servicer and the Sub-Servicers hereby represents and warrants to the Administrator and the Purchaser as follows:

(a)Representations and Warranties. The representations and warranties made by it in the Transaction Documents are true and correct as of the date hereof (unless stated to relate solely to an earlier date, in which case such representations or warranties were true and correct as of such earlier date).

5

(b)Enforceability. The execution and delivery by such Person of this Amendment, and the performance of each of its obligations under this Amendment and the Receivables Purchase Agreement, as amended herby, are within each of its corporate powers and have been duly authorized by all necessary corporate action on its part. This Amendment and the Receivables Purchase Agreement, as amended hereby, are such Person's valid and legally binding obligations, enforceable in accordance with its terms.

(c)No Default. Immediately after giving effect to this Amendment, no Termination Event or Unmatured Termination Event shall exist.

SECTION 6.Effect of Amendment. All provisions of the Receivables Purchase Agreement, as expressly amended and modified by this Amendment, shall remain in full force and effect. After this Amendment become effective, all references in the Receivables Purchase Agreement (or in any other Transaction Document) to “this Agreement”, “hereof”, “herein” or words of similar effect referring to the Receivables Purchase Agreement shall be deemed to be references to the Receivables Purchase Agreement as amended by this amendment. This Amendment shall not be deemed, either expressly or impliedly, to waive, amend or supplement any provision of the receivables Purchase Agreement other than as set forth herein.

SECTION 7.Conditions Precedent and Subsequent to Effectiveness. This Amendment shall be effective as of the date hereof upon:

(a)receipt by the Administrator of counterparts of this Amendment duly executed by each of the parties hereto; and

(b)receipt by each Purchaser Agent of counterparts of the A&R Fee Letter for its Purchaser Group duly executed by each of the parties thereto.

SECTION 8. Counterparts. This Amendment may be executed in any number of counterparts and by different parties on separate counterparts, each of which when so executed shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or electronic transmission shall be effective as delivery of a manually executed counterpart hereof.

SECTION 9. Governing Law. This Amendment shall be governed by, and construed in accordance with, the internal laws of the State of Illinois.

SECTION 10. Section Headings. The various headings of this Amendment are included for convenience only and shall not affect the meaning or interpretation of this Amendment, the Receivables Purchase Agreement or any provision hereof or thereof.

[Signature pages follow.]

6

IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first written above.

P&L RECEIVABLES COMPANY, LLC,

As Seller

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY ENERGY CORPORATION,

As initial Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

S -1

PEABODY ARCLAR MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY MIDWEST MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

TWENTYMILE COAL, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY CABALLO MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

COALSALES II, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

S -2

PEABODY WESTERN COAL COMPANY,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY POWDER RIVER MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY HOLDING COMPANY, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY COALTRADE, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY COALSALES, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

S -3

MARKET STREET FUNDING, LLC, as a Conduit Purchaser and as a Related Committed Purchaser

/s/ Doris J. Hearn

By:     

Name: Doris J. Hearn

Title: Vice President

S -4

PNC BANK, NATIONAL ASSOCIATION, as Purchaser Agent for Market Street's Purchaser Group

/s/ Robyn A. Reeher

By:

Name: Robyn A. Reeher

Title: Vice President

PNC BANK, NATIONAL ASSOCIATION, as the LC Bank and as an LC Participant

/s/ Richard C. Munsick

By:

Name: Richard C. Munsick

Title: Senior Vice President

PNC BANK, NATIONAL ASSOCIATION, as Administrator

/s/ Robyn A. Reeher

By:

Name: Robyn A. Reeher

Title: Vice President

S -5

ATLANTIC ASSET SECURITIZATION LLC, as a Conduit Purchaser

By: Credit Agricole Corporate and Investment Bank, as attorney-in-fact

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

S -6

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as Purchaser Agent for Atlantic's Purchaser Group

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as a Related Committed Purchaser

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as an LC Participant

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

S -7

EX-10.4

Exhibit 10.4

SIXTH AMENDMENT TO THE THIRD AMENDED AND RESTATED

RECEIVABLES PURCHASE AGREEMENT

This SIXTH AMENDMENT TO THE THIRD AMENDED AND RESTATED RECEIVABLES PURCHASE AGREEMENT (this “Amendment”), dated as of May 8, 2012, by and among the following parties:

(i) P&L RECEIVABLES COMPANY, LLC, a Delaware limited liability company, as Seller;

(ii) Peabody energy corporation, A Delaware corporation, as Servicer;

(iii) the various Persons identified on the signature pages hereto as Sub-Servicers;

(iv) MARKET STREET FUNDING LLC (“Market Street”), as a Conduit Purchaser and as a Related Committed Purchaser;

(v) PNC BANK, NATIONAL ASSOCIATION, as Purchaser Agent for Market Street's Purchaser Group, as LC Bank, as an LC Participant and as Administrator;

(vi) ATLANTIC ASSET SECURITIZATION LLC (“Atlantic”), as a Conduit Purchaser; and

(vii) CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK NEW YORK BRANCH, as a Related Committed Purchaser, as Purchaser Agent for Atlantic's Purchase Group and as an LC Participant.

BACKGROUND

1.The parties hereto are parties to that certain Third Amended and Restated Receivables Purchase Agreement, dated as of January 25, 2010 (as amended, amended and restated, supplemented or otherwise modified through the date hereof, the “Receivables Purchase Agreement”).

2.The parties hereto desire to amend the Receivables Purchase Agreement on the terms and subject to the conditions set forth herein.

3.Concurrently herewith, the Fee Letters for each of Market Street's and Atlantic's Purchaser Groups are being amended and restated (such amended and restated Fee Letters, the “A&R Fee Letters”).

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

SECTION 1.Defined Terms. Capitalized terms used but not otherwise defined herein (including, without limitation, capitalized terms used in the above preamble and background section) have the respective meanings set forth in the Receivables Purchase Agreement.

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SECTION 2.Amendment to the Receivables Purchase Agreement.Clause (a) of the definition of “Facility Termination Date” set forth in Exhibit I to the Receivables Purchase Agreement is hereby amended by replacing the date “May 8, 2012” where it appears therein with the date “May 7, 2013”.

SECTION 3.Notice of Extension of Commitments of Liquidity Banks.

(a)Atlantic hereby provides notice to the other parties hereto that contemporaneously herewith, the Liquidity Agreement to which Atlantic is a party is being amended to extend the commitment of the Liquidity Bank thereunder to May 7, 2013.

(b)Market Street hereby provides notice to the other parties hereto that contemporaneously herewith, the Liquidity Agreement to which Market Street is a party is being amended to extend the commitment of the Liquidity Bank thereunder to May 7, 2013.

Section 4.Representations and Warranties. Each of the Seller, the Servicer and the Sub-Servicers hereby represents and warrants to the Administrator and the Purchasers as follows:

(a)Representations and Warranties. The representations and warranties made by it in the Transaction documents are true and correct as of the date hereof (unless stated to relate solely to an earlier date, in which case such representations or warranties were true and correct as of such earlier date).

(b)Enforceability. The execution and delivery by such Person of this Amendment, and the performance of each of its obligations under this Amendment and the Receivables Purchase Agreement, as amended hereby, are within each of its corporate powers and have been duly authorized by all necessary corporate action on its part. This Amendment and the Receivables Purchase Agreement, as amended hereby, are such Person's valid and legally binding obligations, enforceable in accordance with its terms.

(c)No Default. Immediately after giving effect to this Amendment, no Termination Event or Unmatured Termination Event shall exist.

SECTION 5.Effect of Amendment. All provisions of the Receivables Purchase Agreement, as expressly amended and modified by this Amendment, shall remain in full force and effect. After this Amendment becomes effective, all references in the Receivables Purchase Agreement (or in any other Transaction Document) to “this Agreement”, “hereof”, “herein” or words of similar effect referring to the Receivables Purchase Agreement shall be deemed to be references to the Receivables Purchase Agreement as amended by this Amendment. This Amendment shall not be deemed, either expressly or impliedly, to waive, amend or supplement any provision of the Receivables Purchase Agreement other than as set forth herein.

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SECTION 6.Conditions to Effectiveness. This Amendment shall be effective as of the date hereof upon:

(a)receipt by the Administrator of counterparts of this Amendment duly executed by each of the parties hereto; and

(b)receipt by each Purchaser Agent of counterparts of the A&R Fee Letter for its Purchaser Group duly executed by each of the parties thereto.

SECTION 7.Counterparts. This Amendment may be executed in any number of counterparts and by different parties on separate counterparts, each of which when so executed shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or electronic transmission shall be effective as delivery of a manually executed counterpart hereof.

SECTION 8. Governing Law. This Amendment shall be governed by, and construed in accordance with, the internal laws of the State of Illinois.

SECTION 9. Section Headings. The various headings of this Amendment are included for convenience only and shall not affect the meaning or interpretation of this Amendment, the Receivables Purchase Agreement or any provision hereof or thereof.

[Signature pages follow.]

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IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first written above.

P&L RECEIVABLES COMPANY, LLC,

As Seller

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY ENERGY CORPORATION,

As initial Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

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PEABODY ARCLAR MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY MIDWEST MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

TWENTYMILE COAL, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY CABALLO MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

COALSALES II, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

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PEABODY WESTERN COAL COMPANY,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY POWDER RIVER MINING, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY HOLDING COMPANY, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY COALTRADE, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY COALSALES, LLC,

As Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

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MARKET STREET FUNDING, LLC, as a Conduit Purchaser and as a Related Committed Purchaser

/s/ Doris J. Hearn

By:

Name: Doris J. Hearn

Title: Vice President

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PNC BANK, NATIONAL ASSOCIATION, as Purchaser Agent for Market Street's Purchaser Group

/s/ William P. Falcon

By:

Name: William P. Falcon

Title: Vice President

PNC BANK, NATIONAL ASSOCIATION, as the LC Bank and as an LC Participant

/s/ William P. Falcon

By:

Name: William P. Falcon

Title: Vice President

PNC BANK, NATIONAL ASSOCIATION, as Administrator

/s/ William P. Falcon

By:

Name: William P. Falcon

Title: Vice President

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ATLANTIC ASSET SECURITIZATION LLC, as a Conduit Purchaser

By: Credit Agricole Corporate and Investment Bank, as attorney-in-fact

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

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CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as Purchaser Agent for Atlantic's Purchaser Group

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as a Related Committed Purchaser

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as an LC Participant

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

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EX-10.5

Exhibit 10.5

SEVENTH AMENDMENT TO THE THIRD AMENDED AND RESTATED RECEIVABLES PURCHASE AGREEMENT

This SEVENTH AMENDMENT TO THE THIRD AMENDED AND RESTATED RECEIVABLES PURCHASE AGREEMENT (this “Amendment”), dated as of September 26, 2012, is entered into by and among the following parties:

(i) P&L RECEIVABLES COMPANY, LLC, a Delaware limited liability company, as Seller;

(ii) PEABODY ENERGY CORPORATION, a Delaware corporation, as Servicer;

(iii) the various Persons identified on the signature pages hereto as Sub-Servicers;

(iv) MARKET STREET FUNDING LLC (“Market Street”), as a Conduit Purchaser and as a Related Committed Purchaser;

(v) PNC BANK, NATIONAL ASSOCIATION, as Purchaser Agent for Market Street's Purchaser Group, as LC Bank, as an LC Participant and as Administrator;

(vi) ATLANTIC ASSET SECURITIZATION LLC (“Atlantic”), as a Conduit Purchaser; and

(vii) CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK NEW YORK BRANCH, as a Related Committed Purchaser, as Purchaser Agent for Atlantic's Purchaser Group and as an LC Participant.

BACKGROUND

1. The parties hereto are parties to that certain Third Amended and Restated Receivables Purchase Agreement, dated as of January 25, 2010 (as amended, amended and restated, supplemented or otherwise modified through the date hereof, the “Agreement”).

2. The parties hereto desire to amend the Agreement on the terms and subject to the conditions set forth herein.

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

SECTION 1. Defined Terms. Capitalized terms used but not otherwise defined herein (including, without limitation, capitalized terms used in the above preamble and background section) have the respective meanings set forth in the Agreement.

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SECTION 2.Amendments to the Agreement.The Agreement is hereby amended as follows:

(a) Subclause (i) of Section 1.6(f) of the Agreement is hereby amended as follows:

(i)by replacing the amount “$20,000,000” in the two places it appears therein with “$50,000,000”; and

(ii)by replacing the phrase “five Business Days'” where it appears in subclause (B) thereof with “three Business Days'”.

(b) Clause (b) of the definition of “Concentration Percentage” set forth in Exhibit I to the Agreement is hereby amended by replacing “7.5%” where it appears therein with “10%”.

(c)The definition of “Concentration Reserve Percentage” set forth in Exhibit I to the Agreement is hereby replaced in its entirety with the following:

“Concentration Reserve Percentage” means the (a) largest of the following (i) the sum of the four (4) largest Group D Obligor Receivables balances (up to the Concentration Percentage for each Obligor) plus the product of (x) the fifth (5th) largest Group D Obligor Receivables balance (up to the Concentration Percentage for such Obligor) and (y) 0.5, (ii) the sum of the two (2) largest Group C Obligor Receivables balances (up to the Concentration Percentage for each Obligor), (iii) the one (1) largest Group B Obligor Receivables balance (up to the Concentration Percentage for such Obligor), and (iv) the one (1) largest Group A Obligor Receivables balance (up to the Concentration Percentage for such Obligor), divided by (b) the Eligible Receivables.

(d)Clause (a) of the definition of “Eligible Receivable” set forth in Exhibit I to the Agreement is hereby replaced in its entirety with the following:

(a) the Obligor of which is (i) a United States resident or if such Obligor is not a United States resident: (A) such Pool Receivable results from goods sold and shipped from an Originator in the United States and payment for such goods is denominated and payable only in U.S. dollars to an Originator at a Lock-Box Account, and (B) such Obligor is an Eligible Foreign Obligor, (ii) not subject to any action of the type described in paragraph (f) of Exhibit V to the Agreement, (iii) not an Affiliate of Peabody or any other Originator, (iv) not a Sanctioned Obligor and (v) not an Obligor as to which the Administrator, in its reasonable business judgment, has notified the Seller that such Obligor is not acceptable.

(e) Clause (c) of the definition of “Eligible Receivable” set forth in Exhibit I to the Agreement is hereby amended by replacing “60 days” where it appears therein with “30 days”.

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(f) Clause (q) of the definition of “Eligible Receivable” set fort in Exhibit I to the Agreement is hereby replaced in its entirety with the following:

(q)[Reserved]; and

(g)The definition of “Excess Concentration” set forth in Exhibit I to the Agreement is hereby replaced in its entirety with the following:

“Excess Concentration” means the sum of the following, without duplication:

(a) the sum of the amounts (if any) by which the aggregate Outstanding Balance of Eligible Receivables of each Obligor then in the Receivables Pool exceeds an amount equal to the product of (i) Concentration Percentage for such Obligor, multipliedby (ii) the Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(b) the amount (if any) by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool, the Obligors of which are residents of any single country (other than United States of America), exceeds 10.00% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(c) the amount (if any) by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool, the Obligors of which are Eligible Foreign Obligors, exceeds 25.00% (or, if Peabody does not then have a rating of “B” or better by Standard and Poor's on its long term senior unsecured and un-credit-enhanced debt securities and a rating of “B2” or better by Moody's on its long-term senior unsecured and un-credit-enhanced debt securities, 15.00%) of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(d) the amount (if any) by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool, the Obligors of which are governments, governmental subdivisions, affiliates or agencies other than the TVA, exceeds 5.00% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(e) the amount (if any) by which the aggregate Outstanding Balance of all Eligible Receivables considered to be “quality accruals” (as reported on the monthly Information Package), exceeds 5.00% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool.

(h) Subclause (A) of clause (iii) of the definition of “Loss ReservePercentage” is hereby amended by replacing the phrase “four most recent calendar months” where it appears therein with the phrase “five most recent calendar months”.

(i) Subclause (ii) of clause (b) of the definition of “Total Reserves” set forth in Exhibit I to the Agreement is hereby replaced in its entirety with the following:

(ii)the sum of the Concentration Reserve plus the Dilution Component Reserve.

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(j) Exhibit I to the Agreement is hereby amended by adding thereto the following new defined terms in appropriate alphabetical order:

(i) “Dilution Component Reserve” means at any time the product of (a) the sum of the Aggregate Capital and the LC Participation Amount multiplied by (b) (i) the Dilution Component Reserve Percentage on such date divided by (ii) 100% minus the Dilution Component Reserve Percentage.

(ii) “Dilution Component Reserve Percentage” means on any date, the product of (a) the average Dilution Ratio for the twelve preceding calendar months multiplied by (b) the Dilution Horizon.

(iii) “Eligible Foreign Obligor” means an Obligor which is a resident of any country (other than the United States) that has (i) a foreign currency rating of at least “A” by Standard and Poor's and “A2” by Moody's, and (ii) a transfer and convertibility assessment of at least “A” by Standard and Poor's.

(iv)“OFAC” means the U.S. Department of the Treasury's Office of Foreign Assets Control.

(v) “Sanctioned Country” means a country subject to a sanctions program identified on the list maintained by OFAC and available at: http://www.treasury.gov/resource-center/sanctions/Programs/Pages/Programs.aspx or as otherwise published from time to time.

(vi) “Sanctioned Obligor” means an Obligor which (i) if a natural person, is either (A) a resident of a Sanctioned Country or (B) a Sanctioned Person or (ii) if a corporation or other business organization, is organized under the laws of a Sanctioned Country or any political subdivision thereof.

(vii) “Sanctioned Person” means (i) a person named on the list of “Specially Designated Nationals” or “Blocked Persons” maintained by OFAC available at:

http://www.treasury.gov/resource-center/sanctions/SDN-List/Pages/default.aspx, or as otherwise published from time to time or (ii) (A) an agency of the government of a Sanctioned Country, (B) an organization controlled by a Sanctioned Country, or (C) a person resident in a Sanctioned Country, to the extent subject to a sanctions program administered by OFAC.

(k) Section 1 of Exhibit III to the Agreement is hereby amended by adding thereto the following new clause (u):

(u) No Sanctions. The Seller is not a Sanctioned Person. To the Seller's knowledge, no Obligor was a Sanctioned Person at the time of origination of any Pool Receivable owing by such Obligor. The Seller and its Affiliates: (i) have less than 15% of their assets in Sanctioned Countries; and (ii) derive less than 15% of their operating income from investments in, or transactions with, Sanctioned Persons or Sanctioned Countries. The Seller does not engage in activities related to Sanctioned Countries except for such activities as are (A) specifically or generally licensed by OFAC, or (B) otherwise in compliance with OFAC's sanctions regulations.

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(l) Clause (o) of Section 2 of Exhibit III to the Agreement is hereby replaced in its entirety with the following:

(o) Peabody is not a Sanctioned Person. To the Peabody's knowledge, no Obligor was a Sanctioned Person at the time of origination of any Pool Receivable owing by such Obligor. Peabody and its Affiliates: (i) have less than 15% of their assets in Sanctioned Countries; and (ii) derive less than 15% of their operating income from investments in, or transactions with, Sanctioned Persons or Sanctioned Countries. Neither Peabody nor any of its Subsidiaries engages in activities related to Sanctioned Countries except for such activities as are (A) specifically or generally licensed by OFAC, or (B) otherwise in compliance with OFAC's sanctions regulations.

(m) The form of Information Package attached as Annex A to the Agreement is hereby replaced in its entirety by the new form of Information Package attached as Annex A to this Amendment.

SECTION 3.Representations and Warranties. Each of the Seller, the Servicer and the Sub-Servicers hereby represents and warrants to the Administrator and the Purchasers as follows:

(a) Representations and Warranties. The representations and warranties made by it in the Transaction Documents are true and correct as of the date hereof (unless stated to relate solely to an earlier date, in which case such representations or warranties were true and correct as of such earlier date).

(b) Enforceability. The execution and delivery by such Person of this Amendment, and the performance of each of its obligations under this Amendment and the Agreement, as amended hereby, are within each of its corporate powers and have been duly authorized by all necessary corporate action on its part. This Amendment and the Agreement, as amended hereby, are such Person's valid and legally binding obligations, enforceable in accordance with its terms.

(c)No Default. Immediately after giving effect to this Amendment, no Termination Event or Unmatured Termination Event shall exist.

SECTION 4.Effect of Amendment. All provisions of the Agreement, as expressly amended and modified by this Amendment, shall remain in full force and effect. After this Amendment becomes effective, all references in the Agreement (or in any other Transaction Document) to “this Agreement”, “hereof”, “herein” or words of similar effect referring to the Agreement shall be deemed to be references to the Agreement as amended by this Amendment. This Amendment shall not be deemed, either expressly or impliedly, to waive, amend or supplement any provision of the Agreement other than as set forth herein.

SECTION 5.Conditions to Effectiveness. This Amendment shall be effective as of the date hereof upon receipt by the Administrator of counterparts of this Amendment duly executed by each of the parties hereto.

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SECTION 6.Counterparts. This Amendment may be executed in any number of counterparts and by different parties on separate counterparts, each of which when so executed shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument. Delivery of an executed counterpart of a signature page to this Amendment by facsimile or electronic transmission shall be effective as delivery of a manually executed counterpart hereof.

SECTION 7.Governing Law. This Amendment shall be governed by, and construed in accordance with, the internal laws of the State of Illinois.

SECTION 8.Section Headings. The various headings of this Amendment are included for convenience only and shall not affect the meaning or interpretation of this Amendment, the Agreement or any provision hereof or thereof.

[Signature pages follow.]

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IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first written above.

P&L RECEIVABLES COMPANY, LLC, as Seller

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY ENERGY CORPORATION, as initial Servicer

/s/ Walter L. Hawkins, Jr.

By:

Name: Walter L. Hawkins, Jr.

Title: Senior Vice President Finance

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PEABODY ARCLAR MINING, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY MIDWEST MINING, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

TWENTYMILE COAL, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY CABALLO MINING, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

COALSALES II, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

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PEABODY WESTERN COAL COMPANY, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY POWDER RIVER MINING, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY HOLDING COMPANY, LLC,                                 as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY COALTRADE, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

PEABODY COALSALES, LLC, as Sub-Servicer

/s/ Douglas D. Loucks

By:

Name: Douglas D. Loucks

Title: Assistant Treasurer

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MARKET STREET FUNDING LLC, as a Conduit Purchaser and as a Related Committed Purchaser

/s/ Doris J. Hearn

By:

Name: Doris J. Hearn

Title: Vice President

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PNC BANK, NATIONAL ASSOCIATION, as Purchaser Agent for Market Street's Purchaser Group

/s/ William P. Falcon

By:

Name: William P. Falcon

Title: Vice President

PNC BANK, NATIONAL ASSOCIATION, as the

LC Bank and as an LC Participant

/s/ Mark S. Falcione

By:

Name: Mark S. Falcione

Title: Senior Vice President

PNC BANK, NATIONAL ASSOCIATION, as

Administrator

/s/ William P. Falcon

By:

Name: William P. Falcon

Title: Vice President

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ATLANTIC ASSET SECURITIZATION LLC, as a Conduit Purchaser

By: Credit Agricole Corporate and Investment Bank, as attorney-in-fact

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

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CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as Purchaser Agent for Atlantic's Purchaser Group

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as a Related Committed Purchaser

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, as an LC Participant

/s/ Sam Pilcer

By:

Name: Sam Pilcer

Title: Managing Director

/s/ Kostantina Kourmpetis

By:

Name: Kostantina Kourmpetis

Title: Managing Director

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ANNEX A

(Form of Information Package)

A -1

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Gregory H. Boyce, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Peabody Energy Corporation (“the registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 7, 2012

/s/ Gregory H. Boyce  

Gregory H. Boyce 

Chairman and Chief Executive Officer 

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Michael C. Crews, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Peabody Energy Corporation (“the registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 7, 2012

/s/ Michael C. Crews  

Michael C. Crews 

Executive Vice President and Chief Financial Officer 

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. SECTION 1350)

I, Gregory H. Boyce, Chairman and Chief Executive Officer of Peabody Energy Corporation, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2012 (the “Periodic Report”) which this statement accompanies fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of Peabody Energy Corporation.

Dated: November 7, 2012

/s/ Gregory H. Boyce  

Gregory H. Boyce 

Chairman and Chief Executive Officer 

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. SECTION 1350)

I, Michael C. Crews, Executive Vice President and Chief Financial Officer of Peabody Energy Corporation, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) the Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2012 (the “Periodic Report”) which this statement accompanies fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of Peabody Energy Corporation.

Dated: November 7, 2012

/s/ Michael C. Crews  

Michael C. Crews 

Executive Vice President and Chief Financial Officer 

EX-95

Exhibit 95

Mine Safety Disclosures

The following disclosures are provided pursuant to Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank Act) and Item 104 of Regulation S-K, which require certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate coal mines regulated under the Federal Mine Safety and Health Act of 1977 (the Mine Act). The disclosures reflect United States (U.S.) mining operations only, as the requirements of the Dodd-Frank Act and Item 104 of Regulation S-K do not apply to our mines operated outside the U.S. 

Mine Safety Information.  Whenever the Mine Safety and Health Administration (MSHA) believes that a violation of the Mine Act, any health or safety standard, or any regulation has occurred, it may issue a violation which describes the associated condition or practice and designates a timeframe within which the operator must abate the violation. In some situations, such as when MSHA believes that conditions pose a hazard to miners, MSHA may issue an order removing miners from the area of the mine affected by the condition until hazards are corrected. Whenever MSHA issues a citation or order, it generally proposes a civil penalty, or fine, as a result of the violation that the operator is ordered to pay. Citations and orders can be contested and appealed and, as part of that process, are often reduced in severity and amount, and are sometimes vacated. The number of citations, orders and proposed assessments vary depending on the size and type (underground or surface) of the company and mine. Since MSHA is a branch of the U.S. Department of Labor, its jurisdiction applies only to our U.S. mines. As such, the mine safety disclosures that follow contain no information for our Australian mines.

The tables that follow reflect citations and orders issued to us by MSHA during the three and nine months ended September 30, 2012, as reflected in our systems. The tables include only those mines that were issued orders or citations during the periods presented. Due to timing and other factors, our data may not agree with the mine data retrieval system maintained by MSHA. The proposed assessments for the three and nine months ended September 30, 2012 were taken from the MSHA system as of November 6, 2012.

Additional information follows about MSHA references used in the tables is as follows:

• Section 104 S&S Violations: The total number of violations received from MSHA under section 104(a) of the Mine Act that could significantly and substantially contribute to a serious injury if left unabated. In prior periodic reports, all violations received from MSHA under section 104(a) of the Mine Act, not limited to those that could significantly and substantially contribute to a serious injury if left unabated, were shown.

• Section 104(b)Orders: The total number of orders issued by MSHA under section 104(b) of the Mine Act, which represents a failure to abate a citation under section 104(a) within the period of time prescribed by MSHA. This results in an order of immediate withdrawal from the area of the mine affected by the condition until MSHA determines that the violation has been abated.

• Section 104(d)Citations and Orders: The total number of citations and orders issued by MSHA under section 104(d) of the Mine Act for unwarrantable failure to comply with mandatory health or safety standards.

• Section 104(e) Notices: The total number of notices issued by MSHA under section 104(e) of the Mine Act for a pattern of violations that could contribute to mine health or safety hazards.

• Section 110(b)(2)Violations: The total number of flagrant violations issued by MSHA under section 110(b)(2) of the Mine Act.

• Section 107(a)Orders: The total number of orders issued by MSHA under section 107(a) of the Mine Act for situations in which MSHA determined an imminent danger existed.

• Proposed MSHA Assessments: The total dollar value of proposed assessments from MSHA.

• Fatalities: The total number of related fatalities.

Three Months Ended September 30, 2012

	Section 104 S&S Violations	Section 104(b) Orders	Section 104(d) Citations and Orders	Section 104(e) Potential Pattern of Violations	Section 110(b)(2) Violations	Section 107(a) Orders	($) Proposed MSHA Assessments
Mine (1)								Fatalities
							(In thousands)
Western U.S. Mining
Caballo	1	—	—	—	—	—	1.2	—
El Segundo	8	—	—	—	—	—	4.0	—
Kayenta	15	1	10	—	—	—	21.9	—
North Antelope Rochelle	—	—	—	—	—	—	0.5	—
Peabody Williams Fork Mining, LLC	—	—	—	—	—	—	0.1	—
Rawhide	—	—	—	—	—	—	0.2	—
Sage Creek	1	—	—	—	—	—	—	—
Twentymile (Foidel Creek)	9	—	3	—	—	—	35.1	—
Midwestern U.S. Mining
Air Quality (2)	26	—	—	—	—	—	176.5	—
Bear Run	6	—	—	—	—	—	5.9	—
Francisco Surface (3)	1	—	—	—	—	—	2.2	—
Francisco Underground	23	—	1	—	—	—	164.5	—
Gateway	11	—	—	—	—	—	69.7	—
Midwest Repair Facility (Columbia Maintenance Services)	—	—	—	—	—	—	0.1	—
Viking - Corning Pit	—	—	—	—	—	—	0.2	—
Wildcat Hills Underground	5	—	—	—	—	—	39.9	—
Willow Lake Central Preparation Plant	—	—	—	—	—	—	0.1	—
Willow Lake Portal	74	1	6	—	—	—	688.0	—

⁽¹⁾  The definition of mine under section 3 of the Mine Act includes the mine, as well as other items used in, or to be used in, or resulting from, the work of extracting coal, such as land, structures, facilities, equipment, machines, tools and coal preparation facilities. Also, there are instances where the mine name per the MSHA system differs from the mine name utilized by us. Where applicable, we have parenthetically listed the name of the mine per the MSHA system. Also, all mines are listed alphabetically within each of our U.S. mining segments.

⁽²⁾  Mine classified in discontinued operation as of September 30, 2012.

⁽³⁾  Mine was closed as of September 30, 2012.

Nine Months Ended September 30, 2012

	Section 104 S&S Violations	Section 104(b) Orders	Section 104(d) Citations and Orders	Section 104(e) Potential Pattern of Violations	Section 110(b)(2) Violations	Section 107(a) Orders	($) Proposed MSHA Assessments
Mine (1)								Fatalities
							(In thousands)
Western U.S. Mining
Caballo	3	—	—	—	—	1	6.1	—
El Segundo	11	—	—	—	—	—	12.0	—
Kayenta	24	1	13	—	—	—	78.1	—
Lee Ranch	9	—	—	—	—	—	13.5	—
North Antelope Rochelle	5	—	1	—	—	—	56.6	—
Peabody Williams Fork Mining, LLC	—	—	—	—	—	—	0.1	—
Rawhide	10	—	—	—	—	—	21.3	—
Sage Creek	4	—	—	—	—	—	1.5	—
Twentymile (Foidel Creek)	44	—	3	—	—	—	213.4	—
Midwestern U.S. Mining
Air Quality (2)	90	—	2	—	—	1	910.1	—
Bear Run	9	—	—	—	—	—	12.8	—
Cottage Grove (Wildcat Hills-Cottage Grove Pit)	3	—	—	—	—	—	2.7	—
Francisco Surface (3)	1	—	—	—	—	—	2.7	—
Francisco Underground	76	—	1	—	—	1	455.1	—
Gateway	43	—	1	—	—	—	348.5	—
Gateway Preparation Plant	2	—	—	—	—	—	1.6	—
Midwest Repair Facility (Columbia Maintenance Services)	—	—	—	—	—	—	0.1	—
Somerville Central	1	—	—	—	—	—	1.9	—
Viking - Corning Pit	7	—	—	—	—	—	18.7	—
Wild Boar	—	—	—	—	—	—	0.1	—
Wildcat Hills Underground	22	—	—	—	—	—	144.6	—
Willow Lake Central Preparation Plant	3	—	—	—	—	—	1.4	—
Willow Lake Portal	143	1	6	—	—	1	1,563.0	—

⁽¹⁾  The definition of mine under section 3 of the Mine Act includes the mine, as well as other items used in, or to be used in, or resulting from, the work of extracting coal, such as land, structures, facilities, equipment, machines, tools and coal preparation facilities. Also, there are instances where the mine name per the MSHA system differs from the mine name utilized by us. Where applicable, we have parenthetically listed the name of the mine per the MSHA system. Also, all mines are listed alphabetically within each of our U.S. mining segments.

⁽²⁾  Mine classified in discontinued operation as of September 30, 2012.

⁽³⁾  Mine was closed as of September 30, 2012.

Pending Legal Actions. The Federal Mine Safety and Health Review Commission (the Commission) is an independent adjudicative agency that provides administrative trial and appellate review of legal disputes arising under the Mine Act. These cases may involve, among other questions, challenges by operators to citations, orders and penalties they have received from MSHA, or complaints of discrimination by miners under section 105 of the Mine Act. The following is a brief description of the types of legal actions that may be brought before the Commission.

• Contests of Citations and Orders: A contest proceeding may be filed with the Commission by operators, miners or miners’ representatives to challenge the issuance of a citation or order issued by MSHA.

• Contests of Proposed Penalties (Petitions for Assessment of Penalties):A contest of a proposed penalty is an administrative proceeding before the Commission challenging a civil penalty that MSHA has proposed for the violation.

• Complaints for Compensation:A complaint for compensation may be filed with the Commission by miners entitled to compensation when a mine is closed by certain withdrawal orders issued by MSHA. The purpose of the proceeding is to determine the amount of compensation, if any, due miners idled by the orders.

• Complaints of Discharge, Discrimination or Interference:A discrimination proceeding is a case that involves a miner’s allegation that he or she has suffered a wrong by the operator because he or she engaged in some type of activity protected under the Mine Act, such as making a safety complaint.

• Temporary Reinstatement Proceedings:Temporary reinstatement proceedings involve cases in which a miner has filed a complaint with MSHA stating he or she has suffered discrimination and the miner has lost his or her position.

• Emergency Response Plan (ERP) Dispute Proceedings: ERP dispute proceedings are cases brought before the Commission when an operator is issued a citation because it has not agreed to include a certain provision in its ERP.

The table that follows presents information by mine regarding pending legal actions before the Commission at September 30, 2012. Each legal action is assigned a docket number by the Commission and may have as its subject matter one or more citations, orders, penalties or complaints.

	Pending Legal Actions				Legal Actions Initiated During the Three Months Ended September 30, 2012	Legal Actions Resolved During the Three Months Ended September 30, 2012
	Number of Pending Legal Actions as of September 30, 2012	Pre-Penalty Contests of Citations/Orders	Contests of Penalty Assessment	Complaints of Discharge, Discrimination or Interference
Mine(1)
Western U.S. Mining
Kayenta	10	4	6	—	1	—
Lee Ranch	1	—	1	—	1	—
North Antelope Rochelle	3	—	3	—	—	2
Rawhide	1	—	1	—	1	—
Sage Creek	1	—	1	—	1	—
Twentymile (Foidel Creek)	32	4	28	—	7	—
Midwestern U.S. Mining
Air Quality (2)	23	—	23	—	—	—
Air Quality South Wash Plant (2)	1	—	1	—	—	—
Francisco Surface (3)	2	—	2	—	—	—
Francisco Underground	8	1	7	—	—	—
Gateway	8	3	5	—	—	11
Midwest Repair Facility (Columbia Maintenance Services)	3	2	1	—	—	—
Somerville Central	1	—	1	—	—	1
Vermilion Grove (Riola Complex Vermilion Grove Portal) (3)	3	—	3	—	—	—
Wildcat Hills Underground	3	—	3	—	—	—
Willow Lake Portal	83	45	36	2	3	—

⁽¹⁾  The definition of mine under section 3 of the Mine Act includes the mine, as well as other items used in, or to be used in, or resulting from, the work of extracting coal, such as land, structures, facilities, equipment, machines, tools and coal preparation facilities. Also, there are instances where the mine name per the MSHA system differs from the mine name utilized by us. Where applicable, we have parenthetically listed the name of the mine per the MSHA system. Also, all mines are listed alphabetically within each of our U.S. mining segments.

⁽²⁾  Mine classified in discontinued operation as of September 30, 2012.

⁽³⁾  Mine was closed as of September 30, 2012.

XML

Other Commercial Events Other Commercial Events (Tables)

9 Months Ended

Sep. 30, 2012

Other Commercial Events [Abstract]

Resource Management And Other Commercial Events [Text Block]

Inventories	$	3.6
Property, plant, equipment and mine development	153.8
Accounts payable and accrued expenses	(0.8		)
Total, net	$	156.6

XML

Derivatives and Fair Value Measurements (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	$ 218.8	$ (320.8)	$ 326.2	$ 54.0
Gain (loss) reclassified from other comprehensive income into income (effective portion)	93.2	100.7	315.6	289.5
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)	2.2	(1.2)	(2.3)	0.4
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income on non-designated derivatives	0	0	0	0
Explosives Hedge Contracts Member
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses) to be reclassified from comprehensive income to earnings over the next 12 months			(4.0)
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses) to be reclassified from comprehensive income to earnings over the next 12 months			287.0
Foreign Exchange Contract [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	169.2	(269.1)	297.5	33.8
Gain (loss) reclassified from other comprehensive income into income (effective portion)	82.0	92.2	276.6	261.1
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)	0	0	0	0
Foreign Exchange Contract [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income on non-designated derivatives	0	0	0	0
Foreign Exchange Contract [Member] | Depreciation, depletion and amortization [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)		(0.5)		(0.7)
Gain (loss) reclassified from other comprehensive income into income (effective portion)		0		0
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)		0		0
Foreign Exchange Contract [Member] | Depreciation, depletion and amortization [Member] | Cash flow hedges [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income on non-designated derivatives		0		0
Commodity contracts [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	49.6	(51.2)	28.7	20.9
Gain (loss) reclassified from other comprehensive income into income (effective portion)	11.2	8.5	39.0	28.4
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)	2.2	(1.2)	(2.3)	0.4
Commodity contracts [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income on non-designated derivatives	0	0	0	0
Diesel Fuel Hedge Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gains (losses) to be reclassified from comprehensive income to earnings over the next 12 months			$ 30.0

XML

Discontinued Operations Details 1 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	$ 41.5	$ 55.3	$ 171.5	$ 122.7
Loss from discontinued operations before income taxes	(127.6)	(12.1)	(146.6)	(53.9)
Income tax benefit	(46.3)	(2.4)	(53.9)	(15.0)
Loss from discontinued operations, net of income taxes	(81.3)	(9.7)	(92.7)	(38.9)
Other current assets	48.4		48.4		24.6
Investments and other assets	135.2		135.2		232.2
Total assets classified as discontinued operations	183.6		183.6		256.8
Accounts payable and accrued expenses	33.4		33.4		63.9
Other noncurrent liabilities	59.8		59.8		59.6
Total liabilities classified as discontinued operations	$ 93.2		$ 93.2		$ 123.5

XML

Other Commercial Events (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012 mW	Jun. 30, 2012 mW	Jun. 30, 2011	Sep. 30, 2012 mW	Dec. 31, 2011
OtherCommercialEvents [Line Items]
Capacity of new electricity generation project, Megawatts				1,600
Magawatt Capacity of Generation Unit (Unit 1)		800
Inventories	$ 554.9			$ 554.9	$ 444.4
Property, plant, equipment and mine development	12,511.1			12,511.1	11,251.6
Accounts payable and accrued expenses	1,645.1			1,645.1	1,712.3
Reclassification of investments to other items (Total, net)	88.1			88.1
Megawatt capacity of generation unit (unit 2)	800
Project development fee received			14.6
Recognized gain on coal reserves exchange			23.5
Prairie State Energy Campus [Member]
OtherCommercialEvents [Line Items]
Undivided Interest Percent Of New Electricity Generation Project	5.06%	5.06%		5.06%
Inventories		3.6
Property, plant, equipment and mine development		153.8
Accounts payable and accrued expenses		(0.8)
Reclassification of investments to other items (Total, net)		156.6

XML

Derivatives and Fair Value Measurements (Details 2) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative Assets, Current	$ 319.5	$ 313.8
Derivative Assets, Noncurrent	230.2	240.7
Derivative Liabilities, Current	6.1	11.4
Derivative Liabilities, Noncurrent	6.9	19.5
Foreign Exchange Contract [Member] | Cash flow hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Current	286.7	270.4
Derivative Assets, Noncurrent	225.0	229.0
Derivative Liabilities, Current	0	4.3
Derivative Liabilities, Noncurrent	0	4.5
Commodity contracts [Member] | Cash flow hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Current	32.8	43.4
Derivative Assets, Noncurrent	5.2	11.7
Derivative Liabilities, Current	6.1	7.1
Derivative Liabilities, Noncurrent	$ 6.9	$ 15.0

XML

Supplemental Guarantor/Non-Guarantor Financial Information (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash Flows From Operating Activities
Net cash provided by (used In) continuing operations	$ 1,373.7	$ 1,216.7
Net cash (used in) provided by discontinued operations	(82.2)	(26.2)
Net cash provided by (used in) operating activities	1,291.5	1,190.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	(732.1)	(553.4)
Federal coal lease expenditures	(247.9)	(42.4)
Investment in Prairie State Energy Campus	(9.4)	(29.8)
Proceeds from disposal of assets	93.5	12.1
Investments in equity affiliates and joint ventures	0	(39.8)
Proceeds from sales and maturities of debt and equity securities	39.0	53.3
Purchases of debt and equity securities	(23.8)	(44.1)
Purchases of short-term investments	0	(100.0)
Proceeds from sale of short-term investments		100.0
Investment in shares of Macarthur Coal Limited	0	(45.5)
Contributions to joint ventures	(531.2)	0
Distributions from joint ventures	527.7	0
Repayment of loans from related parties	720.2	0
Advances to related parties	(743.4)	0
Other, net	(3.2)	(4.4)
Net cash used in continuing operations	(910.6)	(694.0)
Net cash used in discontinued operations	(11.2)	(62.8)
Net cash used in investing activities	(921.8)	(756.8)
Cash Flows From Financing Activities
Payments of long-term debt	(305.7)	(248.4)
Common stock repurchase	(99.9)	0
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	(49.8)	0
Dividends paid	(69.1)	(69.1)
Repurchase of employee common stock relinquished for tax withholding	(8.3)	(16.1)
Excess tax benefits related to share-based compensation	3.6	6.1
Other, net	(8.4)	(0.2)
Transactions with affiliates, net	0	0
Net cash (used in) provided by financing activities	(520.8)	(327.3)
Net change in cash and cash equivalents	(151.1)	106.4
Cash and cash equivalents at beginning of period	799.1	1,295.2
Cash and cash equivalents at end of period	648.0	1,401.6
Parent Company [Member]
Cash Flows From Operating Activities
Net cash provided by (used In) continuing operations	252.2	144.7
Net cash (used in) provided by discontinued operations	(1.6)	(1.6)
Net cash provided by (used in) operating activities	250.6	143.1
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	0	0
Federal coal lease expenditures	0	0
Investment in Prairie State Energy Campus	0	0
Proceeds from disposal of assets	0	0
Investments in equity affiliates and joint ventures		0
Proceeds from sales and maturities of debt and equity securities	0	0
Purchases of debt and equity securities	0	0
Purchases of short-term investments		(75.0)
Proceeds from sale of short-term investments		75.0
Investment in shares of Macarthur Coal Limited		0
Contributions to joint ventures	0
Distributions from joint ventures	0
Repayment of loans from related parties	0
Advances to related parties	0
Other, net	0	0
Net cash used in continuing operations	0	0
Net cash used in discontinued operations	0	0
Net cash used in investing activities	0	0
Cash Flows From Financing Activities
Payments of long-term debt	(285.3)	(236.9)
Common stock repurchase	(99.9)
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	0
Dividends paid	(69.1)	(69.1)
Repurchase of employee common stock relinquished for tax withholding	(8.3)	(16.1)
Excess tax benefits related to share-based compensation	3.6	6.1
Other, net	(9.4)	(6.8)
Transactions with affiliates, net	153.7	220.2
Net cash (used in) provided by financing activities	(295.9)	(89.0)
Net change in cash and cash equivalents	(45.3)	54.1
Cash and cash equivalents at beginning of period	283.2	903.8
Cash and cash equivalents at end of period	237.9	957.9
Guarantor Subsidiaries [Member]
Cash Flows From Operating Activities
Net cash provided by (used In) continuing operations	1,225.0	718.3
Net cash (used in) provided by discontinued operations	(8.0)	1.2
Net cash provided by (used in) operating activities	1,217.0	719.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	(188.3)	(211.1)
Federal coal lease expenditures	(247.9)	(42.4)
Investment in Prairie State Energy Campus	(9.4)	(29.8)
Proceeds from disposal of assets	59.3	12.1
Investments in equity affiliates and joint ventures		(2.1)
Proceeds from sales and maturities of debt and equity securities	0	0
Purchases of debt and equity securities	0	0
Purchases of short-term investments		0
Proceeds from sale of short-term investments		0
Investment in shares of Macarthur Coal Limited		0
Contributions to joint ventures	0
Distributions from joint ventures	0
Repayment of loans from related parties	0
Advances to related parties	0
Other, net	(3.0)	(4.4)
Net cash used in continuing operations	(389.3)	(277.7)
Net cash used in discontinued operations	(1.9)	(7.5)
Net cash used in investing activities	(391.2)	(285.2)
Cash Flows From Financing Activities
Payments of long-term debt	(0.3)	0
Common stock repurchase	0
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	0
Dividends paid	0	0
Repurchase of employee common stock relinquished for tax withholding	0	0
Excess tax benefits related to share-based compensation	0	0
Other, net	0	0
Transactions with affiliates, net	(826.1)	(438.5)
Net cash (used in) provided by financing activities	(826.4)	(438.5)
Net change in cash and cash equivalents	(0.6)	(4.2)
Cash and cash equivalents at beginning of period	0.8	5.2
Cash and cash equivalents at end of period	0.2	1.0
Non-Guarantor Subsidiaries [Member]
Cash Flows From Operating Activities
Net cash provided by (used In) continuing operations	(103.5)	353.7
Net cash (used in) provided by discontinued operations	(72.6)	(25.8)
Net cash provided by (used in) operating activities	(176.1)	327.9
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	(543.8)	(342.3)
Federal coal lease expenditures	0	0
Investment in Prairie State Energy Campus	0	0
Proceeds from disposal of assets	34.2	0
Investments in equity affiliates and joint ventures		(37.7)
Proceeds from sales and maturities of debt and equity securities	39.0	53.3
Purchases of debt and equity securities	(23.8)	(44.1)
Purchases of short-term investments		(25.0)
Proceeds from sale of short-term investments		25.0
Investment in shares of Macarthur Coal Limited		(45.5)
Contributions to joint ventures	(531.2)
Distributions from joint ventures	527.7
Repayment of loans from related parties	720.2
Advances to related parties	(743.4)
Other, net	(0.2)	0
Net cash used in continuing operations	(521.3)	(416.3)
Net cash used in discontinued operations	(9.3)	(55.3)
Net cash used in investing activities	(530.6)	(471.6)
Cash Flows From Financing Activities
Payments of long-term debt	(20.1)	(11.5)
Common stock repurchase	0
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	(49.8)
Dividends paid	0	0
Repurchase of employee common stock relinquished for tax withholding	0	0
Excess tax benefits related to share-based compensation	0	0
Other, net	1.0	6.6
Transactions with affiliates, net	672.4	218.3
Net cash (used in) provided by financing activities	601.5	200.2
Net change in cash and cash equivalents	(105.2)	56.5
Cash and cash equivalents at beginning of period	515.1	386.2
Cash and cash equivalents at end of period	$ 409.9	$ 442.7

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Acquisition of Macarthur Coal Limited Details Textuals (Details) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended		2 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended						2 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Additional Paid-in Capital [Member]	Sep. 30, 2012 MCGH [Member]	Feb. 03, 2012 MCGH [Member]	Feb. 03, 2012 MCGH [Member] Term Loan Facility Three [Member]	Sep. 30, 2012 MCGH [Member] Additional Paid-in Capital [Member]	Dec. 21, 2011 ArcelorMittal Mining Australasia B.V. [Member]	Dec. 20, 2011 Macarthur [Member]	Dec. 31, 2012 Macarthur [Member]	Sep. 30, 2012 Macarthur [Member]	Sep. 30, 2012 Macarthur [Member]	Dec. 31, 2015 Macarthur [Member]	Dec. 31, 2014 Macarthur [Member]	Dec. 31, 2013 Macarthur [Member]	Dec. 21, 2011 Macarthur [Member]	Oct. 26, 2011 Macarthur [Member]	Oct. 23, 2011 Macarthur [Member]	Dec. 20, 2011 Macarthur [Member] PEAMCoal [Member]
Business Acquisition [Line Items]
Ownership percentage of the Company in the newly formed company																		100.00%		60.00%
Ownership percentage of the joint owner in the newly formed company										40.00%										40.00%
Payments to Acquire Businesses, Net of Cash Acquired											$ 2,800,000,000										$ 4,800,000,000
Cash Acquired from Acquisition																					261,200,000
Business Acquisition, Other Acquisitions										2,000,000,000
Business Combination, provisional information, initial accounting incomplete, adjustment, depreciation, depletion and amortization													4,700,000	12,200,000
Business Combinations, Provisional information, Initial accounting incomplete, adjustment, operating costs and expenses														10,100,000
Business Acquisition Purchase Price Allocation: Take or Pay Liability													47,400,000	47,400,000					58,500,000
Business Combinations Provisional Information Initial Accounting Incomplete Adjustment Expenses Related to Take or Pay Arrangements													3,800,000	11,100,000
Take Or Pay Commitments Due Within The Next Year												3,700,000
Take or Pay Commitments Due Within Next Two Years																	18,100,000
Take or Pay Commitments Due Within Next Three Year																15,600,000
Take Or Pay Commitments Due Within Next Four Years															10,000,000
Revenues	2,058,800,000	1,980,600,000	6,060,600,000	5,666,100,000									182,500,000	479,500,000
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	172,200,000	330,400,000	605,900,000	1,030,100,000									(4,400,000)	98,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Investments and Other Assets								384,600,000
Equity Interest, Converted From Receivable, Per Court Ruling							90.00%
business combinations, recognized identifiable assets acquired and liabilities assumed, noncontrolling interest							53,400,000
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests			(49,800,000)	0	3,600,000	49,800,000			3,600,000
Net Income (Loss) Attributable to Parent	$ 42,900,000	$ 274,100,000	$ 420,300,000	$ 735,400,000

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Derivatives and Fair Value Measurements (Tables) (Non Coal Trading [Member])

9 Months Ended

Sep. 30, 2012

Non Coal Trading [Member]

Derivative [Line Items]

Company's foreign currency and commodity positions

Notional Amounts and Fair Value. The following summarizes the Company’s foreign currency and commodity positions at September 30, 2012:

	Notional Amount by Year of Maturity
	Total		2012		2013		2014		2015
Foreign Currency
A$:US$ hedge contracts (A$ millions)	$	4,832.3	$	566.1	$	2,173.6	$	1,513.5	$	579.1
Commodity Contracts
Diesel fuel hedge contracts (million gallons)	215.4		27.0		102.1		63.6		22.7
U.S. explosives hedge contracts (million MMBtu)	4.6		0.8		2.6		1.2		—

	Account Classification by
	Cash Flow Hedge		Fair Value Hedge		Economic Hedge		Fair Value Asset (Liability)
							(Dollars in millions)
Foreign Currency
A$:US$ hedge contracts (A$ millions)	$	4,832.3	$	—	$	—	$	511.7
Commodity Contracts
Diesel fuel hedge contracts (million gallons)	215.4		—		—		30.9
U.S. explosives hedge contracts (million MMBtu)	4.6		—		—		(5.9		)

Classification and amounts of pre-tax gains and losses related to the Company's non-trading hedges

The tables below show the classification and amounts of pre-tax gains and losses related to the Company’s non-coal trading hedges during the three and nine months ended September 30, 2012 and 2011:        

		Three Months Ended September 30, 2012
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Gain reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	49.6		$	11.2	$	2.2
Foreign currency forward and option contracts	Operating costs and expenses	—		169.2			82.0		—
Total		$	—	$	218.8		$	93.2	$	2.2
		Three Months Ended September 30, 2011
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Loss recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Loss reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	(51.2	)	$	8.5	$	(1.2	)
Foreign currency forward and option contracts:
— Operating costs	Operating costs and expenses	—		(269.1		)	92.2		—
— Capital expenditures	Depreciation, depletion and amortization	—		(0.5		)	—		—
Total		$	—	$	(320.8	)	$	100.7	$	(1.2	)

Classification and amount of derivatives, gross

The classification and amount of derivatives presented on a gross basis as of September 30, 2012 and December 31, 2011 were as follows:

	Fair Value as of September 30, 2012
Financial Instrument	Current Assets		Noncurrent Assets		Current Liabilities		Noncurrent Liabilities
	(Dollars in millions)
Commodity swap contracts	$	32.8	$	5.2	$	6.1	$	6.9
Foreign currency forward and option contracts	286.7		225.0		—		—
Total	$	319.5	$	230.2	$	6.1	$	6.9

	Fair Value as of December 31, 2011
Financial Instrument	Current Assets		Noncurrent Assets		Current Liabilities		Noncurrent Liabilities
	(Dollars in millions)
Commodity swap contracts	$	43.4	$	11.7	$	7.1	$	15.0
Foreign currency forward and option contracts	270.4		229.0		4.3		4.5
Total	$	313.8	$	240.7	$	11.4	$	19.5

Fair value measured on recurring basis of financial assets and liabilities

The following tables set forth the hierarchy of the Company’s net financial asset positions for which fair value is measured on a recurring basis:

	September 30, 2012
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investments in debt and equity securities	$	67.3	$	—	$	—	$	67.3
Commodity swap contracts	—		25.0		—		25.0
Foreign currency forward and option contracts	—		511.7		—		511.7
Total net financial assets	$	67.3	$	536.7	$	—	$	604.0

	December 31, 2011
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investments in debt and equity securities	$	83.5	$	—	$	—	$	83.5
Commodity swap contracts	—		33.0		—		33.0
Foreign currency forward and option contracts	—		490.6		—		490.6
Total net financial assets	$	83.5	$	523.6	$	—	$	607.1

Carrying amounts and estimated fair values of the Company's debt

The carrying amounts and estimated fair values of the Company’s debt are summarized as follows:

	September 30, 2012				December 31, 2011
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
	(Dollars in millions)
Long-term debt	$	6,363.1	$	6,393.0	$	6,657.5	$	6,922.7

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Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Subsequent Event [Line Items]
Payments to Acquire Businesses and Interest in Affiliates	$ 0	$ 45.5

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Commitments and Contingencies (Details 1) (USD $)	3 Months Ended						9 Months Ended	12 Months Ended						264 Months Ended			12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2012 T	Sep. 30, 2011 T	Sep. 30, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014 T	Dec. 31, 2013 T	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2032 Y	Jul. 31, 2011 T	Sep. 30, 2012 Capital Additions [Member]	Dec. 31, 2020 Minimum [Member] T	Dec. 31, 2019 Minimum [Member] T	Dec. 31, 2018 Minimum [Member] T	Dec. 31, 2017 Minimum [Member] T	Dec. 31, 2016 Minimum [Member] T	Dec. 31, 2015 Minimum [Member] T	Dec. 31, 2020 Maximum [Member] T	Dec. 31, 2019 Maximum [Member] T	Dec. 31, 2018 Maximum [Member] T	Dec. 31, 2017 Maximum [Member] T	Dec. 31, 2016 Maximum [Member] T	Dec. 31, 2015 Maximum [Member] T
Long-term Purchase Commitment [Line Items]
Commitments outstanding for capital expenditures due, total																$ 728,300,000
Commitments outstanding for capital expenditures due within one year																688,500,000
LeasedcoalreservesadjacenttoNARM					1,100,000,000
Weightedaveragebidpricepermineabletononcoalreserves					1.10		1.10
Annualpaymentsoncoalreserves2012to2016							247,900,000	247,900,000	247,900,000	247,900,000	247,900,000
Number Of Tons Of Coal In Which Company Was Named Winning Bidder															220,000,000
Bid Price Per Mineable Ton															0.95
Annual Coal Reserve Payments Pursuant To Belle Ayr North Lease									42,100,000	42,100,000	42,100,000	42,100,000	42,100,000
Number Of Tons Of Coal In Which Company Was Named Winning Bidder In The Powder River Basin						130,000,000
Bid Price Per Mineable Ton In The Powder River Basin															1.10
Annual Coal Reserve Payments Pursuant To Caballo West Lease									28,600,000	28,600,000	28,600,000	28,600,000	28,600,000
Reimbursement for the difference in the federal coal lease payments made in 2011					13,500,000
Annual true up payments for the excess of the $1.10 bid price versus $0.95 under the transferred lease	3,900,000	3,900,000	3,900,000	3,900,000	3,900,000
Aggregate received from Alpha for the reimbursement payment and first true up payment							$ 17,400,000
Remaining annual true up payments due from Alpha on November 1 of each of the years from 2012 through 2015				4
Federal Coal Lease Term														20
Export capacity in 2013											2,000,000
Export Capacity in 2014										4,000,000
Export Capacity Increase From Kinder Morgan																	5,000,000	5,000,000	5,000,000	5,000,000	5,000,000	5,000,000	7,000,000	7,000,000	7,000,000	7,000,000	7,000,000	7,000,000

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Derivatives and Fair Value Measurements (Details 4) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 6,363.1	$ 6,657.5
Carrying amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	6,363.1	6,657.5
Estimated fair value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 6,393.0	$ 6,922.7
7.875% Senior Notes due November 2026 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rates on Senior Notes	7.875%

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Supplemental Guarantor/Non-Guarantor Financial Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Unaudited Supplemental Condensed Consolidated Statements of Operations
Total revenues	$ 2,058.8	$ 1,980.6	$ 6,060.6	$ 5,666.1
Costs and expenses
Operating costs and expenses	1,509.0	1,399.4	4,396.8	3,958.7
Depreciation, depletion and amortization	172.5	108.4	470.7	317.6
Asset retirement obligation expenses	21.1	14.6	53.3	43.3
Selling and administrative expenses	68.7	71.2	202.4	191.4
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	(0.2)	(1.7)	(7.6)	(31.4)
(Income) loss from equity affiliates	21.2	3.2	50.5	9.0
Interest expense	99.4	59.2	308.3	159.1
Interest income	(5.1)	(4.1)	(19.7)	(11.7)
Unrealized (gain) loss on derivatives	0		0
Income (loss) from continuing operations before income taxes	172.2	330.4	605.9	1,030.1
Income tax provision (benefit)	49.3	39.2	85.5	238.8
Income (loss) from continuing operations, net of income taxes	122.9	291.2	520.4	791.3
Loss from discontinued operations, net of income taxes	(81.3)	(9.7)	(92.7)	(38.9)
Net income (loss)	41.6	281.5	427.7	752.4
Less: Net (loss) income attributable to noncontrolling interests	(1.3)	7.4	7.4	17.0
Net income (loss) attributable to common stockholders	42.9	274.1	420.3	735.4
Comprehensive income (loss) attributable to common stockholders	119.3	82.4	585.9	664.2
Parent Company [Member]
Unaudited Supplemental Condensed Consolidated Statements of Operations
Total revenues	0	0	0	0
Costs and expenses
Operating costs and expenses	(95.6)	(99.3)	(313.2)	(289.3)
Depreciation, depletion and amortization	0	0	0	0
Asset retirement obligation expenses	0	0	0	0
Selling and administrative expenses	8.3	8.0	29.2	24.9
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	0	0	0	0
(Income) loss from equity affiliates	(117.0)	(252.5)	(407.9)	(664.3)
Interest expense	101.8	61.0	312.1	162.3
Interest income	(72.9)	(4.1)	(224.3)	(12.8)
Unrealized (gain) loss on derivatives	0		0
Income (loss) from continuing operations before income taxes	175.4	286.9	604.1	779.2
Income tax provision (benefit)	131.8	12.9	182.7	43.1
Income (loss) from continuing operations, net of income taxes	43.6	274.0	421.4	736.1
Loss from discontinued operations, net of income taxes	(0.7)	0.1	(1.1)	(0.7)
Net income (loss)	42.9	274.1	420.3	735.4
Less: Net (loss) income attributable to noncontrolling interests	0	0	0	0
Net income (loss) attributable to common stockholders	42.9	274.1	420.3	735.4
Comprehensive income (loss) attributable to common stockholders	119.3	82.4	585.9	664.2
Guarantor Subsidiaries [Member]
Unaudited Supplemental Condensed Consolidated Statements of Operations
Total revenues	1,336.9	1,213.3	3,539.2	3,427.8
Costs and expenses
Operating costs and expenses	882.8	905.0	2,546.9	2,619.7
Depreciation, depletion and amortization	84.8	69.6	232.0	210.5
Asset retirement obligation expenses	11.8	11.0	34.7	30.7
Selling and administrative expenses	54.5	52.5	154.5	151.0
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	(1.4)	(1.8)	(6.3)	(32.3)
(Income) loss from equity affiliates	1.9	2.7	5.7	6.4
Interest expense	5.8	13.7	12.9	40.6
Interest income	(46.8)	(5.2)	(112.6)	(15.8)
Unrealized (gain) loss on derivatives	(112.3)		(69.6)
Income (loss) from continuing operations before income taxes	455.8	165.8	741.0	417.0
Income tax provision (benefit)	101.7	46.7	155.3	109.0
Income (loss) from continuing operations, net of income taxes	354.1	119.1	585.7	308.0
Loss from discontinued operations, net of income taxes	(75.9)	(7.7)	(78.0)	(6.3)
Net income (loss)	278.2	111.4	507.7	301.7
Less: Net (loss) income attributable to noncontrolling interests	0	0	0	0
Net income (loss) attributable to common stockholders	278.2	111.4	507.7	301.7
Comprehensive income (loss) attributable to common stockholders	291.7	121.5	548.6	337.3
Non-Guarantor Subsidiaries [Member]
Unaudited Supplemental Condensed Consolidated Statements of Operations
Total revenues	778.3	811.3	2,694.4	2,456.5
Costs and expenses
Operating costs and expenses	778.2	637.7	2,336.1	1,846.5
Depreciation, depletion and amortization	87.7	38.8	238.7	107.1
Asset retirement obligation expenses	9.3	3.6	18.6	12.6
Selling and administrative expenses	5.9	10.7	18.7	15.5
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	1.2	0.1	(1.3)	0.9
(Income) loss from equity affiliates	19.3	0.5	44.8	2.6
Interest expense	124.4	1.9	350.3	7.5
Interest income	(18.0)	(12.2)	(49.8)	(34.4)
Unrealized (gain) loss on derivatives	112.3		69.6
Income (loss) from continuing operations before income taxes	(342.0)	130.2	(331.3)	498.2
Income tax provision (benefit)	(184.2)	(20.4)	(252.5)	86.7
Income (loss) from continuing operations, net of income taxes	(157.8)	150.6	(78.8)	411.5
Loss from discontinued operations, net of income taxes	(4.7)	(2.1)	(13.6)	(31.9)
Net income (loss)	(162.5)	148.5	(92.4)	379.6
Less: Net (loss) income attributable to noncontrolling interests	(1.3)	7.4	7.4	17.0
Net income (loss) attributable to common stockholders	(161.2)	141.1	(99.8)	362.6
Comprehensive income (loss) attributable to common stockholders	(175.8)	205.2	34.4	405.8
Eliminations [Member]
Unaudited Supplemental Condensed Consolidated Statements of Operations
Total revenues	(56.4)	(44.0)	(173.0)	(218.2)
Costs and expenses
Operating costs and expenses	(56.4)	(44.0)	(173.0)	(218.2)
Depreciation, depletion and amortization	0	0	0	0
Asset retirement obligation expenses	0	0	0	0
Selling and administrative expenses	0	0	0	0
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	0	0	0	0
(Income) loss from equity affiliates	117.0	252.5	407.9	664.3
Interest expense	(132.6)	(17.4)	(367.0)	(51.3)
Interest income	132.6	17.4	367.0	51.3
Unrealized (gain) loss on derivatives	0		0
Income (loss) from continuing operations before income taxes	(117.0)	(252.5)	(407.9)	(664.3)
Income tax provision (benefit)	0	0	0	0
Income (loss) from continuing operations, net of income taxes	(117.0)	(252.5)	(407.9)	(664.3)
Loss from discontinued operations, net of income taxes	0	0	0	0
Net income (loss)	(117.0)	(252.5)	(407.9)	(664.3)
Less: Net (loss) income attributable to noncontrolling interests	0	0	0	0
Net income (loss) attributable to common stockholders	(117.0)	(252.5)	(407.9)	(664.3)
Comprehensive income (loss) attributable to common stockholders	$ (115.9)	$ (326.7)	$ (583.0)	$ (743.1)
Senior Notes Due April 2016
Condensed Financial Statements, Captions [Line Items]
Interest rates on Senior Notes	5.875%		5.875%
7.375% Senior Notes due November 2016 [Member]
Condensed Financial Statements, Captions [Line Items]
Interest rates on Senior Notes	7.375%		7.375%
Senior Notes due September 2018
Condensed Financial Statements, Captions [Line Items]
Interest rates on Senior Notes	6.00%		6.00%
Senior Notes due September 2020
Condensed Financial Statements, Captions [Line Items]
Interest rates on Senior Notes	6.50%		6.50%
Senior Notes due September 2021
Condensed Financial Statements, Captions [Line Items]
Interest rates on Senior Notes	6.25%		6.25%
7.875% Senior Notes due November 2026 [Member]
Condensed Financial Statements, Captions [Line Items]
Interest rates on Senior Notes	7.875%		7.875%

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Supplemental Guarantor/Non-Guarantor Financial Information (Details 1) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 648.0	$ 799.1	$ 1,401.6	$ 1,295.2
Accounts receivable, net	682.2	922.5
Inventories	554.9	444.4
Assets from coal trading activities, net	56.2	44.6
Deferred income taxes	15.8	27.3
Other current assets	697.6	768.0
Total current assets	2,654.7	3,005.9
Property, plant, equipment and mine development, net	12,511.1	11,251.6
Investments and other assets	1,684.6	2,475.5
Total assets	16,850.4	16,733.0
Current liabilities
Current maturities of long-term debt	124.8	101.1
Payables to (receivables from) affiliates, net	0	0
Liabilities from coal trading activities, net	19.9	10.3
Deferred income taxes	0	0
Accounts payable and accrued expenses	1,645.1	1,712.3
Total current liabilities	1,789.8	1,823.7
Long-term debt, less current maturities	6,238.3	6,556.4
Deferred income taxes	385.0	523.2
Notes (receivables from) payable to affiliates, net	0	0
Other noncurrent liabilities	2,460.3	2,313.9
Total liabilities	10,873.4	11,217.2
Peabody Energy Corporation's stockholders' equity	5,944.6	5,485.1
Noncontrolling interests	32.4	30.7
Total stockholders' equity	5,977.0	5,515.8
Total liabilities and stockholders' equity	16,850.4	16,733.0
Parent Company [Member]
Current assets
Cash and cash equivalents	237.9	283.2	957.9	903.8
Accounts receivable, net	5.4	5.3
Inventories	0	0
Assets from coal trading activities, net	0	0
Deferred income taxes	0	0
Other current assets	317.7	305.1
Total current assets	561.0	593.6
Property, plant, equipment and mine development, net	0	0
Investments and other assets	10,700.6	10,300.8
Total assets	11,261.6	10,894.4
Current liabilities
Current maturities of long-term debt	75.0	62.5
Payables to (receivables from) affiliates, net	2,272.8	2,417.8
Liabilities from coal trading activities, net	0	0
Deferred income taxes	11.6	11.6
Accounts payable and accrued expenses	121.1	69.4
Total current liabilities	2,480.5	2,561.3
Long-term debt, less current maturities	6,132.7	6,428.8
Deferred income taxes	66.6	76.0
Notes (receivables from) payable to affiliates, net	(3,421.3)	(3,720.0)
Other noncurrent liabilities	58.5	63.2
Total liabilities	5,317.0	5,409.3
Peabody Energy Corporation's stockholders' equity	5,944.6	5,485.1
Noncontrolling interests	0	0
Total stockholders' equity	5,944.6	5,485.1
Total liabilities and stockholders' equity	11,261.6	10,894.4
Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents	0.2	0.8	1.0	5.2
Accounts receivable, net	72.1	100.8
Inventories	257.4	218.1
Assets from coal trading activities, net	9.6	14.9
Deferred income taxes	69.6	48.0
Other current assets	23.3	100.7
Total current assets	432.2	483.3
Property, plant, equipment and mine development, net	5,130.5	4,797.7
Investments and other assets	106.0	310.8
Total assets	5,668.7	5,591.8
Current liabilities
Current maturities of long-term debt	0	0
Payables to (receivables from) affiliates, net	(2,576.6)	(2,529.1)
Liabilities from coal trading activities, net	9.7	4.2
Deferred income taxes	0	0
Accounts payable and accrued expenses	704.1	868.8
Total current liabilities	(1,862.8)	(1,656.1)
Long-term debt, less current maturities	6.6	0
Deferred income taxes	126.0	95.3
Notes (receivables from) payable to affiliates, net	(1,097.4)	(981.5)
Other noncurrent liabilities	1,975.4	1,923.6
Total liabilities	(852.2)	(618.7)
Peabody Energy Corporation's stockholders' equity	6,520.9	6,210.5
Noncontrolling interests	0	0
Total stockholders' equity	6,520.9	6,210.5
Total liabilities and stockholders' equity	5,668.7	5,591.8
Non-Guarantor Subsidiaries [Member]
Current assets
Cash and cash equivalents	409.9	515.1	442.7	386.2
Accounts receivable, net	604.7	816.4
Inventories	297.5	226.3
Assets from coal trading activities, net	46.6	29.7
Deferred income taxes	0	0
Other current assets	356.6	362.2
Total current assets	1,715.3	1,949.7
Property, plant, equipment and mine development, net	7,380.6	6,453.9
Investments and other assets	936.0	1,496.1
Total assets	10,031.9	9,899.7
Current liabilities
Current maturities of long-term debt	49.8	38.6
Payables to (receivables from) affiliates, net	303.8	111.3
Liabilities from coal trading activities, net	10.2	6.1
Deferred income taxes	42.2	9.1
Accounts payable and accrued expenses	819.9	774.1
Total current liabilities	1,225.9	939.2
Long-term debt, less current maturities	99.0	127.6
Deferred income taxes	192.4	351.9
Notes (receivables from) payable to affiliates, net	4,518.7	4,701.5
Other noncurrent liabilities	426.4	327.1
Total liabilities	6,462.4	6,447.3
Peabody Energy Corporation's stockholders' equity	3,537.1	3,421.7
Noncontrolling interests	32.4	30.7
Total stockholders' equity	3,569.5	3,452.4
Total liabilities and stockholders' equity	10,031.9	9,899.7
Eliminations [Member]
Current assets
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Inventories	0	0
Assets from coal trading activities, net	0	0
Deferred income taxes	(53.8)	(20.7)
Other current assets	0	0
Total current assets	(53.8)	(20.7)
Property, plant, equipment and mine development, net	0	0
Investments and other assets	(10,058.0)	(9,632.2)
Total assets	(10,111.8)	(9,652.9)
Current liabilities
Current maturities of long-term debt	0	0
Payables to (receivables from) affiliates, net	0	0
Liabilities from coal trading activities, net	0	0
Deferred income taxes	(53.8)	(20.7)
Accounts payable and accrued expenses	0	0
Total current liabilities	(53.8)	(20.7)
Long-term debt, less current maturities	0	0
Deferred income taxes	0	0
Notes (receivables from) payable to affiliates, net	0	0
Other noncurrent liabilities	0	0
Total liabilities	(53.8)	(20.7)
Peabody Energy Corporation's stockholders' equity	(10,058.0)	(9,632.2)
Noncontrolling interests	0	0
Total stockholders' equity	(10,058.0)	(9,632.2)
Total liabilities and stockholders' equity	$ (10,111.8)	$ (9,652.9)

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Earnings per Share (EPS) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
EPS numerator:
Income from continuing operations, net of income taxes	$ 122.9		$ 291.2		$ 520.4		$ 791.3
Less: Net (loss) income attributable to noncontrolling interests	(1.3)		7.4		7.4		17.0
Income from continuing operations attributable to common stockholders, before allocation of earnings to participating securities	124.2		283.8		513.0		774.3
Earnings from continuing operations allocated to participating securities	0.8		1.6		3.8		4.4
Income from continuing operations attributable to common stockholders, after earnings allocated to participating securities	123.4	[1]	282.2	[1]	509.2	[1]	769.9	[1]
Loss from discontinued operations, net of income taxes	(81.3)		(9.7)		(92.7)		(38.9)
Loss from discontinued operations allocated to participating securities	(0.6)		0		(0.8)		(0.2)
Loss from discontinued operations attributable to common stockholders, after earnings allocated to participating securities	(80.7)	[1]	(9.7)	[1]	(91.9)	[1]	(38.7)	[1]
Net income attributable to common stockholders, after earnings allocated to participating securities	42.7	[1]	272.5	[1]	417.3	[1]	731.2	[1]
EPS denominator:
Weighted average shares outstanding - basic	266.2		269.2		268.5		269.0
Impact of dilutive securities	0.6		1.4		0.7		1.5
Weighted average shares outstanding - diluted	266.8		270.6		269.2		270.5
Basic EPS attributable to common stockholders:
Income from continuing operations	$ 0.46		$ 1.05		$ 1.89		$ 2.86
Loss from discontinued operations	$ (0.30)		$ (0.04)		$ (0.34)		$ (0.14)
Net income	$ 0.16		$ 1.01		$ 1.55		$ 2.72
Diluted EPS attributable to common stockholders:
Income from continuing operations	$ 0.46		$ 1.04		$ 1.89		$ 2.84
Loss from discontinued operations	$ (0.30)		$ (0.04)		$ (0.34)		$ (0.13)
Net income	$ 0.16		$ 1.00		$ 1.55		$ 2.71
Earnings per Share (EPS) (Textuals) [Abstract]
Adjustment for participating securities used to calculate diluted EPS was less than	$ 0.1		$ 0.1		$ 0.1		$ 0.1
Anti-dilutive shares, in millions	0.1		0.1		0.1		0.1

[1] The reallocation adjustment for participating securities to arrive at the numerator used to calculate diluted EPS was less than $0.1 million for the periods presented.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2012

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Commitments

Unconditional Purchase Obligations

As of September 30, 2012, purchase commitments for capital expenditures were $728.3 million, all of which is obligated within the next three years and $688.5 million is obligated in the next 12 months.

Federal Coal Leases

In the second quarter of 2012, the Company was named by the U.S. Department of the Interior, Bureau of Land Management (BLM) as the winning bidder for control of approximately 1.1 billion tons of federal coal reserves adjacent to its North Antelope Rochelle Mine in the Southern Powder River Basin of Wyoming, with a weighted average bid price of approximately $1.10 per mineable ton. Consequently, the Company made aggregate payments of $247.9 million in the nine months ended September 30, 2012 pursuant to the two associated federal coal leases, with remaining annual payments of $247.9 million due in each of the next four years.

In July 2011, the Company was named by the BLM as the winning bidder for control of approximately 220 million tons of federal coal reserves adjacent to its Caballo Mine in the Powder River Basin at a bid price of $0.95 per mineable ton, with payments of $42.1 million due annually in each of the years from 2011 through 2015 pursuant to the associated federal coal lease (the Belle Ayr North Lease). Similarly, in September 2011, a subsidiary of Alpha Natural Resources, Inc. (Alpha) was named by the BLM as the winning bidder for control of approximately 130 million tons of federal coal reserves in the Powder River Basin at a bid price of $1.10 per mineable ton, with contractual payments of $28.6 million due annually in each of the years from 2011 through 2015 under the associated federal coal lease (the Caballo West Lease). In July 2012, the Company and Alpha executed a lease exchange agreement with the BLM whereby the Company agreed to sell, assign and transfer its interest in the Belle Ayr North Lease in exchange for (i) Alpha's interest in the Caballo West Lease, (ii) reimbursement of $13.5 million for the difference in the related federal coal lease payments made by each party in 2011 and (iii) five annual true up payments of $3.9 million for the excess of the $1.10 bid price per mineable ton assumed under the Caballo West Lease over the $0.95 price under the transferred lease. An aggregate of $17.4 million was received from Alpha at closing for the reimbursement payment and first true up payment, which was classified in "Proceeds from disposal of assets" in the unaudited condensed consolidated statement of cash flows for the nine months ended September 30, 2012. The four remaining annual true up payments are due from Alpha on November 1 in each of the years from 2012 through 2015.

The federal coal leases executed with the BLM described above expire after a 20-year initial term, unless at such time there is ongoing production on the subject leases or within an active logical mining unit of which they are part.

Other

In the third quarter of 2012, the Company entered into long-term agreements with Kinder Morgan Energy Partners L.P. (Kinder Morgan) to secure and expand the Gulf Coast export platform of the Company's Western U.S. Mining and Midwestern U.S. Mining coal products. Under the multi-terminal agreements, the Company gains additional access to Kinder Morgan's Deepwater Terminal and Houston Bulk Terminal near Houston, Texas and International Marine Terminal in Myrtle Grove, Louisiana through 2021 and 2020, respectively. The agreements are expected to increase the Company's annual Gulf Coast coal export capacity by approximately 2 million and 4 million tons in 2013 and 2014, respectively, and 5 million to 7 million tons in each of the years from 2015 through 2020. These agreements are subject to customary minimum throughput obligations during those periods at commercially reasonable coal handling, blending and storage rates.

There were no other material changes to the Company’s commitments from the information provided in Note 23 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

Contingencies

From time to time, the Company and/or its subsidiaries are involved in legal proceedings arising in the ordinary course of business or related to indemnities or historical operations. The Company believes it has recorded adequate reserves for these liabilities and that there is no individual case pending that is likely to have a material adverse effect on the Company’s financial condition, results of operations or cash flows. The Company discusses its significant legal proceedings below.

Litigation Relating to Continuing Operations

Gulf Power Company Litigation.  On June 22, 2006, Gulf Power Company (Gulf Power) filed a breach of contract lawsuit against a Company subsidiary in the U.S. District Court, Northern District of Florida, contesting the force majeure declaration by the Company’s subsidiary under a coal supply agreement with Gulf Power and seeking damages for alleged past and future tonnage shortfalls of nearly 5 million tons under the agreement, which expired on December 31, 2007. On June 30, 2009, the court granted Gulf Power’s motion for partial summary judgment on liability and denied the Company subsidiary’s motion for summary judgment. On September 30, 2010, the court entered its order on damages, awarding Gulf Power zero dollars in damages and the Company subsidiary its costs to defend the lawsuit. On November 1, 2010, Gulf Power filed a motion to alter or amend the judgment, contesting the trial court’s damages order, to which the Company subsidiary objected. The court entered an order on July 29, 2011 that affirmed its September 30, 2010 decision in all respects except for 2007 cover coal purchases and granted in part Gulf Power's motion to alter judgment with respect to 2007 cover coal purchases. On September 30, 2011, the court entered an order awarding Gulf Power damages in the amount of $20.5 million for its 2007 cover coal purchases. On January 19, 2012, the court entered its order awarding Gulf Power prejudgment interest in the amount of $6.9 million plus post-judgment interest. The Company's subsidiary has filed its notice of appeal and briefing is complete. Oral arguments before the U.S. Court of Appeals for the Eleventh Circuit is scheduled for the week of January 26, 2013. Based on the Company's evaluation of information currently available concerning the issues and their potential impact, the Company believes that its subsidiary will be successful in the liability appeals process and, therefore, no liability has been recorded at this time.

Monto Coal Pty Limited, Monto Coal 2 Pty Ltd Limited and Macarthur Coal Limited. In October 2007, a statement of claim was delivered to Monto Coal Pty Ltd, a wholly owned subsidiary of PEA-PCI, then Macarthur Coal Limited, and Monto Coal 2 Pty Ltd, an equity accounted investee, from the minority interest holders in the Monto Coal Joint Venture, alleging that Monto Coal 2 Pty Ltd breached the Monto Coal Joint Venture Agreement and Monto Coal Pty Ltd breached the Monto Coal Management Agreement. Monto Coal Pty Ltd is the manager of the Monto Coal Joint Venture pursuant to the Management Agreement. Monto Coal 2 Pty Ltd holds a 51% interest in the Monto Coal Joint Venture. The plaintiffs are Sanrus Pty Ltd, Edge Developments Pty Ltd and H&J Enterprises (Qld) Pty Ltd. An additional statement of claim was delivered to PEA-PCI in November 2010 from the same minority interest holders in the Monto Coal Joint Venture, alleging that PEA-PCI induced Monto Coal 2 Pty Ltd and Monto Coal Pty Ltd to breach the Monto Coal Joint Venture Agreement and the Monto Coal Management Agreement, respectively. These actions, which are pending before the Supreme Court of Queensland, Australia, seek damages from the three defendants collectively of no less than $1,193.2 million Australian dollars, plus interest and costs. The defendants dispute the claims and are vigorously defending their positions. Based on the Company's evaluation of the issues and their potential impact, the amount of any future loss cannot be reasonably estimated. However, based on current information, the Company believes these claims are likely to be finalized without a material adverse effect on its financial condition, results of operations or cash flows.

Claims and Litigation Relating to Indemnities or Historical Operations

Oklahoma Lead Claims.  Gold Fields Mining, LLC (Gold Fields) is a dormant, non-coal producing entity that was previously managed and owned by Hanson plc, the Company’s predecessor owner. In a February 1997 spin-off, Hanson plc transferred ownership of Gold Fields to the Company, despite the fact that Gold Fields had no ongoing operations and the Company had no prior involvement in its past operations. Gold Fields is currently one of the Company’s subsidiaries. The Company indemnified TXU Group with respect to certain claims relating to a former affiliate of Gold Fields. A predecessor of Gold Fields formerly operated two lead mills near Picher, Oklahoma prior to the 1950s and mined, in accordance with lease agreements and permits, approximately 0.15% of the total amount of the crude ore mined in the county.

In June 2005, Gold Fields and other potentially responsible parties (PRPs) received a letter from the U. S. Department of Justice alleging that the PRPs' mining operations caused the U.S. Environmental Protection Agency (EPA) to incur approximately $125 million in residential yard remediation costs at Picher, Oklahoma and will cause the EPA to incur additional remediation costs relating to historical mining sites. In June 2008, Gold Fields and other PRPs received letters from the U.S. Department of Justice and the EPA re-initiating settlement negotiations. Gold Fields continues to participate in the settlement discussions. Gold Fields believes it has meritorious defenses to these claims.

In February 2005, the state of Oklahoma, on behalf of itself and several other parties, sent a notice to Gold Fields and other companies regarding a possible natural resources damage claim. The state of Oklahoma has also indicated that it seeks to recover remediation costs from these parties.

The outcome of these claims is subject to numerous uncertainties. Based on the Company’s evaluation of the issues and their potential impact, the amount of any future loss cannot be reasonably estimated. However, based on current information, the Company believes these claims are likely to be resolved without a material adverse effect on its financial condition, results of operations or cash flows.

Patriot Coal Corporation. On October 23, 2012, eight individual plaintiffs and the United Mine Workers of America filed a putative class action lawsuit in the U.S. District Court for the Southern District of West Virginia against Peabody Holding Company, LLC, Peabody Energy Corporation and an unrelated coal company. The lawsuit seeks to have the court obligate the defendants to maintain certain Patriot Coal Corporation benefit plans at their current levels and to find the defendants actions in violation of the Employee Retirement Income Security Act of 1974. The Company believes that the lawsuit is without merit and will vigorously defend against it.

Environmental Claims and Litigation

Environmental claims have been asserted against Gold Fields related to activities of Gold Fields or a former affiliate. Gold Fields or the former affiliate has been named a PRP at five national priority list sites based on the Superfund Amendments and Reauthorization Act of 1986. Claims were asserted at 13 additional sites, bringing the total to 18, which have since been reduced to 10 by completion of work, transfer or regulatory inactivity. The number of PRP sites in and of itself is not a relevant measure of liability because the nature and extent of environmental concerns varies by site, as does the estimated share of responsibility relative to other PRPs for Gold Fields or the former affiliate. Undiscounted liabilities for environmental cleanup-related costs for all of the sites noted above were $48.7 million as of September 30, 2012 and $52.5 million as of December 31, 2011, $7.8 million and $11.6 million of which was reflected as a current liability, respectively. These amounts represent those costs that the Company believes are probable and reasonably estimable.

Significant uncertainty exists as to whether claims will be pursued against Gold Fields in all cases, and where they are pursued, the amount of the eventual costs and liabilities, which could be greater or less than the liabilities recorded in the consolidated balance sheets. Based on the Company's evaluation of the issues and their potential impact, the total amount of any future loss cannot be reasonably estimated. However, based on current information, the Company believes these claims are likely to be resolved without a material adverse effect on its financial condition, results of operations or cash flows.

Native Village of Kivalina and City of Kivalina v. ExxonMobil Corporation, et al.  In February 2008, the Native Village of Kivalina and the City of Kivalina filed a lawsuit in the U.S. District Court for the Northern District of California against the Company, several owners of electricity generating facilities and several oil companies. The plaintiffs are the governing bodies of a village in Alaska that they contend is being destroyed by erosion allegedly caused by global warming that the plaintiffs attribute to emissions of greenhouse gases by the defendants. The plaintiffs assert claims for nuisance, and allege that the defendants have acted in concert and are jointly and severally liable for the plaintiffs’ damages. The suit seeks damages for lost property values and for the cost of relocating the village. The defendants filed motions to dismiss on the grounds of lack of personal and subject matter jurisdiction. In June 2009, the court granted defendants’ motion to dismiss for lack of subject matter jurisdiction finding that plaintiffs’ federal claim for nuisance is barred by the political question doctrine and for lack of standing. The plaintiffs appealed the court’s dismissal to the U.S. Court of Appeals for the Ninth Circuit, which heard oral arguments on November 28, 2011. On September 29, 2012, the U.S. Court of Appeals for the Ninth Circuit affirmed the district court's dismissal of the case on the grounds that the Clean Air Act and Environmental Protection Agency action under the Clean Air Act displaces the plaintiffs' claims.  On October 4, 2012, the plaintiffs filed a petition for rehearing en banc, which requests the case to be heard before all judges of the court.

Other

In addition, at times the Company becomes a party to other claims, lawsuits, arbitration proceedings and administrative procedures in the ordinary course of business in the U.S., Australia and other countries where the Company does business. In June 2007, the New York Office of the Attorney General served a letter and subpoena on the Company, seeking information and documents relating to the Company's disclosure to investors of risks associated with possible climate change and related legislation and regulations. The Company believes it has made full and proper disclosure of these potential risks. Based on current information, the Company believes that the ultimate resolution of such other pending or threatened proceedings is not reasonably likely to have a material adverse effect on its financial position, results of operations or cash flows.

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Investments (Details 1) (Debt Securities [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Debt Securities [Member]
Contractual maturities for available-for-sale maturities
Due in one year or less, Cost	$ 4.2
Due in one to five years, Cost	36.1
Total Cost	40.3
Due in one year or less, Fair Value	4.2
Due in one to five years, Fair Value	36.6
Total Fair Value	$ 40.8

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Operating segment results

Reportable segment results were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Revenues:
Australian Mining	$	866.0		$	718.7		$	2,605.0		$	2,155.3
Western U.S. Mining	783.5			758.5			2,213.5			2,124.5
Midwestern U.S. Mining	355.7			368.5			1,050.1			1,025.3
Trading and Brokerage	45.6			131.5			173.7			329.5
Corporate and Other	8.0			3.4			18.3			31.5
Total	$	2,058.8		$	1,980.6		$	6,060.6		$	5,666.1
Adjusted EBITDA:
Australian Mining	$	221.4		$	246.1		$	757.4		$	852.2
Western U.S. Mining	243.9			218.7			616.3			532.2
Midwestern U.S. Mining	103.5			105.4			317.4			292.8
Trading and Brokerage	35.7			57.4			109.2			134.6
Corporate and Other	(144.6		)	(119.1		)	(378.8		)	(273.4		)
Total	$	459.9		$	508.5		$	1,421.5		$	1,538.4

Reconciliation of Adjusted EBITDA to consolidated income from continuing operations

A reconciliation of Adjusted EBITDA to consolidated income from continuing operations, net of income taxes follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Total Adjusted EBITDA	$	459.9		$	508.5		$	1,421.5		$	1,538.4
Depreciation, depletion and amortization	172.5			108.4			470.7			317.6
Amortization of basis difference related to equity affiliates	(0.2		)	—			3.0			—
Asset retirement obligation expenses	21.1			14.6			53.3			43.3
Interest expense	99.4			59.2			308.3			159.1
Interest income	(5.1		)	(4.1		)	(19.7		)	(11.7		)
Income tax provision	49.3			39.2			85.5			238.8
Income from continuing operations, net of income taxes	$	122.9		$	291.2		$	520.4		$	791.3

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Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating segment results
Revenues	$ 2,058.8	$ 1,980.6	$ 6,060.6	$ 5,666.1
Adjusted EBITDA	459.9	508.5	1,421.5	1,538.4
Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations [Abstract]
Adjusted EBITDA	459.9	508.5	1,421.5	1,538.4
Depreciation, depletion and amortization	(172.5)	(108.4)	(470.7)	(317.6)
Amortization of basis difference related to equity affiliates	(0.2)	0	3.0	0
Asset retirement obligation expenses	21.1	14.6	53.3	43.3
Interest expense	99.4	59.2	308.3	159.1
Interest income	(5.1)	(4.1)	(19.7)	(11.7)
Income tax provision	49.3	39.2	85.5	238.8
Income from continuing operations, net of income taxes	122.9	291.2	520.4	791.3
Western U.S. Mining [Member]
Operating segment results
Revenues	783.5	758.5	2,213.5	2,124.5
Adjusted EBITDA	243.9	218.7	616.3	532.2
Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations [Abstract]
Adjusted EBITDA	243.9	218.7	616.3	532.2
Midwestern U.S. Mining [Member]
Operating segment results
Revenues	355.7	368.5	1,050.1	1,025.3
Adjusted EBITDA	103.5	105.4	317.4	292.8
Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations [Abstract]
Adjusted EBITDA	103.5	105.4	317.4	292.8
Australian Mining [Member]
Operating segment results
Revenues	866.0	718.7	2,605.0	2,155.3
Adjusted EBITDA	221.4	246.1	757.4	852.2
Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations [Abstract]
Adjusted EBITDA	221.4	246.1	757.4	852.2
Trading and Brokerage [Member]
Operating segment results
Revenues	45.6	131.5	173.7	329.5
Adjusted EBITDA	35.7	57.4	109.2	134.6
Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations [Abstract]
Adjusted EBITDA	35.7	57.4	109.2	134.6
Corporate and Other [Member]
Operating segment results
Revenues	8.0	3.4	18.3	31.5
Adjusted EBITDA	(144.6)	(119.1)	(378.8)	(273.4)
Reconciliation Of Adjusted Ebitda To Consolidated Income From Continuing Operations [Abstract]
Adjusted EBITDA	$ (144.6)	$ (119.1)	$ (378.8)	$ (273.4)

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Debt (Tables)

9 Months Ended

Sep. 30, 2012

Debt Instrument [Line Items]

Schedule of Long-term Debt Instruments [Table Text Block]

The Company’s total indebtedness as of September 30, 2012 and December 31, 2011 consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Term Loan	$	450.0	$	468.8
2011 Term Loan Facility	975.0		1,000.0
7.375% Senior Notes due November 2016	650.0		650.0
6.00% Senior Notes due November 2018	1,518.8		1,600.0
6.50% Senior Notes due September 2020	650.0		650.0
6.25% Senior Notes due November 2021	1,339.6		1,500.0
7.875% Senior Notes due November 2026	247.4		247.3
Convertible Junior Subordinated Debentures due December 2066	376.8		375.2
Capital lease obligations	111.6		122.8
Other	43.9		43.4
Total Debt	$	6,363.1	$	6,657.5

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Inventories (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Inventories
Materials and supplies	$ 157.0	$ 123.7
Raw coal	162.2	108.1
Saleable coal	235.7	212.6
Total	$ 554.9	$ 444.4

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Debt Textuals (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Capital Lease Obligations	$ 111.6	$ 122.8
Other	43.9	43.4
Total Debt	6,363.1	6,657.5
Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt	450.0	468.8
2011 Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	975.0	1,000.0
7.375% Senior Notes due November 2016 [Member]
Debt Instrument [Line Items]
Long-term Debt	650.0	650.0
6.00% Senior Notes due November 2018 [Member]
Debt Instrument [Line Items]
Long-term Debt	1,518.8	1,600.0
6.50% Senior Notes due September 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt	650.0	650.0
6.25% Senior Notes due November 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt	1,339.6	1,500.0
7.875% Senior Notes due November 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt	247.4	247.3
Convertible Junior Subordinated Debentures due December 2066 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 376.8	$ 375.2

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Coal Trading (Details 2) (Credit Concentration Risk [Member], Coal Trading Positions [Member], Coal Trading [Member])	Sep. 30, 2012
External Credit Rating, Investment Grade [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	88.00%
External Credit Rating, Non Investment Grade [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	9.00%
Non Rated [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	3.00%

XML

Discontinued Operations (Details) (Air Quality [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Air Quality [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Amount of Other Income (Loss) from Disposition of Discontinued Operations, before Income Tax	$ 116.7	$ 116.7
Discontinued Operation, Amount of Other Income (Loss) from Disposition of Discontinued Operation, Net of Tax	75.0	75.0
Impairment of Long-Lived Assets to be Disposed of	108.9	108.9
Impairment of Long-Lived Assets to be Disposed of (after tax)	$ 68.8	$ 68.8

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Unaudited Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (Parentheticals) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net unrealized losses on available-for-sale securities, tax benefit	$ (3.0)	$ (2.0)	$ (11.2)	$ (2.3)
Cash flow hedges, tax provision (benefit)	36.8	(140.3)	39.7	(66.7)
Postretirement plans and workers' compensation obligations, tax provision	$ 8.1	$ 6.3	$ 24.2	$ 12.8

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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					9 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2020 Minimum [Member] T	Dec. 31, 2019 Minimum [Member] T	Dec. 31, 2018 Minimum [Member] T	Dec. 31, 2017 Minimum [Member] T	Dec. 31, 2016 Minimum [Member] T	Dec. 31, 2015 Minimum [Member] T	Dec. 31, 2020 Maximum [Member] T	Dec. 31, 2019 Maximum [Member] T	Dec. 31, 2018 Maximum [Member] T	Dec. 31, 2017 Maximum [Member] T	Dec. 31, 2016 Maximum [Member] T	Dec. 31, 2015 Maximum [Member] T
Long-term Purchase Commitment [Line Items]
Annualpaymentsoncoalreserves2012to2016						$ 247.9	$ 247.9	$ 247.9	$ 247.9	$ 247.9
Annual Coal Reserve Payments Pursuant To Belle Ayr North Lease								42.1	42.1	42.1	42.1	42.1
Annual Coal Reserve Payments Pursuant To Caballo West Lease								28.6	28.6	28.6	28.6	28.6
Annual true up payments for the excess of the $1.10 bid price versus $0.95 under the transferred lease	$ 3.9	$ 3.9	$ 3.9	$ 3.9	$ 3.9
Export Capacity Increase From Kinder Morgan													5,000,000	5,000,000	5,000,000	5,000,000	5,000,000	5,000,000	7,000,000	7,000,000	7,000,000	7,000,000	7,000,000	7,000,000

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Supplemental Guarantor/Non-Guarantor Financial Information (Tables)

9 Months Ended

Sep. 30, 2012

Supplemental Guarantor Non Guarantor Financial Information [Abstract]

Unaudited Supplemental Condensed Consolidating Statements of Operations

Unaudited Supplemental Condensed Consolidating Statements of Income

	Three Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	1,336.9		$	778.3		$	(56.4	)	$	2,058.8
Costs and expenses
Operating costs and expenses	(95.6		)	882.8			778.2			(56.4		)	1,509.0
Depreciation, depletion and amortization	—			84.8			87.7			—			172.5
Asset retirement obligation expenses	—			11.8			9.3			—			21.1
Selling and administrative expenses	8.3			54.5			5.9			—			68.7
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(1.4		)	1.2			—			(0.2		)
(Income) loss from equity affiliates	(117.0		)	1.9			19.3			117.0			21.2
Interest expense	101.8			5.8			124.4			(132.6		)	99.4
Interest income	(72.9		)	(46.8		)	(18.0		)	132.6			(5.1		)
Unrealized (gain) loss on derivatives	—			(112.3		)	112.3			—			—
Income (loss) from continuing operations before income taxes	175.4			455.8			(342.0		)	(117.0		)	172.2
Income tax provision (benefit)	131.8			101.7			(184.2		)	—			49.3
Income (loss) from continuing operations, net of income taxes	43.6			354.1			(157.8		)	(117.0		)	122.9
Loss from discontinued operations, net of income taxes	(0.7		)	(75.9		)	(4.7		)	—			(81.3		)
Net income (loss)	42.9			278.2			(162.5		)	(117.0		)	41.6
Less: Net loss attributable to noncontrolling interests	—			—			(1.3		)	—			(1.3		)
Net income (loss) attributable to common stockholders	$	42.9		$	278.2		$	(161.2	)	$	(117.0	)	$	42.9
Comprehensive income (loss) attributable to common stockholders	$	119.3		$	291.7		$	(175.8	)	$	(115.9	)	$	119.3

Unaudited Supplemental Condensed Consolidating Statements of Income

	Three Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	1,213.3		$	811.3		$	(44.0	)	$	1,980.6
Costs and expenses
Operating costs and expenses	(99.3		)	905.0			637.7			(44.0		)	1,399.4
Depreciation, depletion and amortization	—			69.6			38.8			—			108.4
Asset retirement obligation expenses	—			11.0			3.6			—			14.6
Selling and administrative expenses	8.0			52.5			10.7			—			71.2
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(1.8		)	0.1			—			(1.7		)
(Income) loss from equity affiliates	(252.5		)	2.7			0.5			252.5			3.2
Interest expense	61.0			13.7			1.9			(17.4		)	59.2
Interest income	(4.1		)	(5.2		)	(12.2		)	17.4			(4.1		)
Income from continuing operations before income taxes	286.9			165.8			130.2			(252.5		)	330.4
Income tax provision (benefit)	12.9			46.7			(20.4		)	—			39.2
Income from continuing operations, net of income taxes	274.0			119.1			150.6			(252.5		)	291.2
Income (loss) from discontinued operations, net of income taxes	0.1			(7.7		)	(2.1		)	—			(9.7		)
Net income	274.1			111.4			148.5			(252.5		)	281.5
Less: Net income attributable to noncontrolling interests	—			—			7.4			—			7.4
Net income attributable to common stockholders	$	274.1		$	111.4		$	141.1		$	(252.5	)	$	274.1
Comprehensive income attributable to common stockholders	$	82.4		$	121.5		$	205.2		$	(326.7	)	$	82.4

Unaudited Supplemental Condensed Consolidating Statements of Income

	Nine Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	3,539.2		$	2,694.4		$	(173.0	)	$	6,060.6
Costs and expenses
Operating costs and expenses	(313.2		)	2,546.9			2,336.1			(173.0		)	4,396.8
Depreciation, depletion and amortization	—			232.0			238.7			—			470.7
Asset retirement obligation expenses	—			34.7			18.6			—			53.3
Selling and administrative expenses	29.2			154.5			18.7			—			202.4
Other operating (income) loss:
Net gain on disposal or exchange of assets	—			(6.3		)	(1.3		)	—			(7.6		)
(Income) loss from equity affiliates	(407.9		)	5.7			44.8			407.9			50.5
Interest expense	312.1			12.9			350.3			(367.0		)	308.3
Interest income	(224.3		)	(112.6		)	(49.8		)	367.0			(19.7		)
Unrealized (gain) loss on derivatives	—			(69.6		)	69.6			—			—
Income (loss) from continuing operations before income taxes	604.1			741.0			(331.3		)	(407.9		)	605.9
Income tax provision (benefit)	182.7			155.3			(252.5		)	—			85.5
Income (loss) from continuing operations, net of income taxes	421.4			585.7			(78.8		)	(407.9		)	520.4
Loss from discontinued operations, net of income taxes	(1.1		)	(78.0		)	(13.6		)	—			(92.7		)
Net income (loss)	420.3			507.7			(92.4		)	(407.9		)	427.7
Less: Net income attributable to noncontrolling interests	—			—			7.4			—			7.4
Net income (loss) attributable to common stockholders	$	420.3		$	507.7		$	(99.8	)	$	(407.9	)	$	420.3
Comprehensive income attributable to common stockholders	$	585.9		$	548.6		$	34.4		$	(583.0	)	$	585.9

Unaudited Supplemental Condensed Consolidating Statements of Income

	Nine Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	3,427.8		$	2,456.5		$	(218.2	)	$	5,666.1
Costs and expenses
Operating costs and expenses	(289.3		)	2,619.7			1,846.5			(218.2		)	3,958.7
Depreciation, depletion and amortization	—			210.5			107.1			—			317.6
Asset retirement obligation expenses	—			30.7			12.6			—			43.3
Selling and administrative expenses	24.9			151.0			15.5			—			191.4
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(32.3		)	0.9			—			(31.4		)
(Income) loss from equity affiliates	(664.3		)	6.4			2.6			664.3			9.0
Interest expense	162.3			40.6			7.5			(51.3		)	159.1
Interest income	(12.8		)	(15.8		)	(34.4		)	51.3			(11.7		)
Income from continuing operations before income taxes	779.2			417.0			498.2			(664.3		)	1,030.1
Income tax provision	43.1			109.0			86.7			—			238.8
Income from continuing operations, net of income taxes	736.1			308.0			411.5			(664.3		)	791.3
Loss from discontinued operations, net of income taxes	(0.7		)	(6.3		)	(31.9		)	—			(38.9		)
Net income	735.4			301.7			379.6			(664.3		)	752.4
Less: Net income attributable to noncontrolling interests	—			—			17.0			—			17.0
Net income attributable to common stockholders	$	735.4		$	301.7		$	362.6		$	(664.3	)	$	735.4
Comprehensive income attributable to common stockholders	$	664.2		$	337.3		$	405.8		$	(743.1	)	$	664.2

Unaudited Supplemental Condensed Consolidating Balance Sheet

Unaudited Supplemental Condensed Consolidating Balance Sheets

	September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Reclassifications/ Eliminations			Consolidated
	(Dollars in millions)
Assets
Current assets
Cash and cash equivalents	$	237.9		$	0.2		$	409.9	$	—		$	648.0
Accounts receivable, net	5.4			72.1			604.7		—			682.2
Inventories	—			257.4			297.5		—			554.9
Assets from coal trading activities, net	—			9.6			46.6		—			56.2
Deferred income taxes	—			69.6			—		(53.8		)	15.8
Other current assets	317.7			23.3			356.6		—			697.6
Total current assets	561.0			432.2			1,715.3		(53.8		)	2,654.7
Property, plant, equipment and mine development, net	—			5,130.5			7,380.6		—			12,511.1
Investments and other assets	10,700.6			106.0			936.0		(10,058.0		)	1,684.6
Total assets	$	11,261.6		$	5,668.7		$	10,031.9	$	(10,111.8	)	$	16,850.4
Liabilities and Stockholders’ Equity
Current liabilities
Current maturities of long-term debt	$	75.0		$	—		$	49.8	$	—		$	124.8
Payables to (receivables from) affiliates, net	2,272.8			(2,576.6		)	303.8		—			—
Liabilities from coal trading activities, net	—			9.7			10.2		—			19.9
Deferred income taxes	11.6			—			42.2		(53.8		)	—
Accounts payable and accrued expenses	121.1			704.1			819.9		—			1,645.1
Total current liabilities	2,480.5			(1,862.8		)	1,225.9		(53.8		)	1,789.8
Long-term debt, less current maturities	6,132.7			6.6			99.0		—			6,238.3
Deferred income taxes	66.6			126.0			192.4		—			385.0
Notes (receivable from) payable to affiliates, net	(3,421.3		)	(1,097.4		)	4,518.7		—			—
Other noncurrent liabilities	58.5			1,975.4			426.4		—			2,460.3
Total liabilities	5,317.0			(852.2		)	6,462.4		(53.8		)	10,873.4
Peabody Energy Corporation’s stockholders’ equity	5,944.6			6,520.9			3,537.1		(10,058.0		)	5,944.6
Noncontrolling interests	—			—			32.4		—			32.4
Total stockholders’ equity	5,944.6			6,520.9			3,569.5		(10,058.0		)	5,977.0
Total liabilities and stockholders’ equity	$	11,261.6		$	5,668.7		$	10,031.9	$	(10,111.8	)	$	16,850.4

Supplemental Condensed Consolidating Balance Sheets

	December 31, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Reclassifications/ Eliminations			Consolidated
	(Dollars in millions)
Assets
Current assets
Cash and cash equivalents	$	283.2		$	0.8		$	515.1	$	—		$	799.1
Accounts receivable, net	5.3			100.8			816.4		—			922.5
Inventories	—			218.1			226.3		—			444.4
Assets from coal trading activities, net	—			14.9			29.7		—			44.6
Deferred income taxes	—			48.0			—		(20.7		)	27.3
Other current assets	305.1			100.7			362.2		—			768.0
Total current assets	593.6			483.3			1,949.7		(20.7		)	3,005.9
Property, plant, equipment and mine development, net	—			4,797.7			6,453.9		—			11,251.6
Investments and other assets	10,300.8			310.8			1,496.1		(9,632.2		)	2,475.5
Total assets	$	10,894.4		$	5,591.8		$	9,899.7	$	(9,652.9	)	$	16,733.0
Liabilities and Stockholders’ Equity
Current liabilities
Current maturities of long-term debt	$	62.5		$	—		$	38.6	$	—		$	101.1
Payables to (receivables from) affiliates, net	2,417.8			(2,529.1		)	111.3		—			—
Liabilities from coal trading activities, net	—			4.2			6.1		—			10.3
Deferred income taxes	11.6			—			9.1		(20.7		)	—
Accounts payable and accrued expenses	69.4			868.8			774.1		—			1,712.3
Total current liabilities	2,561.3			(1,656.1		)	939.2		(20.7		)	1,823.7
Long-term debt, less current maturities	6,428.8			—			127.6		—			6,556.4
Deferred income taxes	76.0			95.3			351.9		—			523.2
Notes (receivable from) payable to affiliates, net	(3,720.0		)	(981.5		)	4,701.5		—			—
Other noncurrent liabilities	63.2			1,923.6			327.1		—			2,313.9
Total liabilities	5,409.3			(618.7		)	6,447.3		(20.7		)	11,217.2
Peabody Energy Corporation’s stockholders’ equity	5,485.1			6,210.5			3,421.7		(9,632.2		)	5,485.1
Noncontrolling interests	—			—			30.7		—			30.7
Total stockholders’ equity	5,485.1			6,210.5			3,452.4		(9,632.2		)	5,515.8
Total liabilities and stockholders’ equity	$	10,894.4		$	5,591.8		$	9,899.7	$	(9,652.9	)	$	16,733.0

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

	Nine Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
	(Dollars in millions)
Cash Flows From Operating Activities
Net cash provided by (used in) continuing operations	$	252.2		$	1,225.0		$	(103.5	)	$	1,373.7
Net cash used in discontinued operations	(1.6		)	(8.0		)	(72.6		)	(82.2		)
Net cash provided by (used in) operating activities	250.6			1,217.0			(176.1		)	1,291.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	—			(188.3		)	(543.8		)	(732.1		)
Federal coal lease expenditures	—			(247.9		)	—			(247.9		)
Investment in Prairie State Energy Campus	—			(9.4		)	—			(9.4		)
Proceeds from disposal of assets	—			59.3			34.2			93.5
Proceeds from sales and maturities of debt and equity securities	—			—			39.0			39.0
Purchases of debt and equity securities	—			—			(23.8		)	(23.8		)
Contributions to joint ventures	—			—			(531.2		)	(531.2		)
Distributions from joint ventures	—			—			527.7			527.7
Repayments of loans from related parties	—			—			720.2			720.2
Advances to related parties	—			—			(743.4		)	(743.4		)
Other, net	—			(3.0		)	(0.2		)	(3.2		)
Net cash used in continuing operations	—			(389.3		)	(521.3		)	(910.6		)
Net cash used in discontinued operations	—			(1.9		)	(9.3		)	(11.2		)
Net cash used in investing activities	—			(391.2		)	(530.6		)	(921.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(285.3		)	(0.3		)	(20.1		)	(305.7		)
Common stock repurchase	(99.9		)	—			—			(99.9		)
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	—			—			(49.8		)	(49.8		)
Dividends paid	(69.1		)	—			—			(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(8.3		)	—			—			(8.3		)
Excess tax benefits related to share-based compensation	3.6			—			—			3.6
Other, net	9.4			—			(1.0		)	8.4
Transactions with affiliates, net	153.7			(826.1		)	672.4			—
Net cash (used in) provided by financing activities	(295.9		)	(826.4		)	601.5			(520.8		)
Net change in cash and cash equivalents	(45.3		)	(0.6		)	(105.2		)	(151.1		)
Cash and cash equivalents at beginning of period	283.2			0.8			515.1			799.1
Cash and cash equivalents at end of period	$	237.9		$	0.2		$	409.9		$	648.0

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

	Nine Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
	(Dollars in millions)
Cash Flows From Operating Activities
Net cash provided by continuing operations	$	144.7		$	718.3		$	353.7		$	1,216.7
Net cash (used in) provided by discontinued operations	(1.6		)	1.2			(25.8		)	(26.2		)
Net cash provided by operating activities	143.1			719.5			327.9			1,190.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	—			(211.1		)	(342.3		)	(553.4		)
Federal coal lease expenditures	—			(42.4		)	—			(42.4		)
Investment in Prairie State Energy Campus	—			(29.8		)	—			(29.8		)
Proceeds from disposal of assets	—			12.1			—			12.1
Investment in equity affiliates and joint ventures	—			(2.1		)	(37.7		)	(39.8		)
Proceeds from sales and maturities of debt and equity securities	—			—			53.3			53.3
Purchases of debt and equity securities	—			—			(44.1		)	(44.1		)
Purchases of short-term investments	(75.0		)	—			(25.0		)	(100.0		)
Proceeds from sale of short-term investments	75.0			—			25.0			100.0
Investment in shares of Macarthur Coal Limited	—			—			(45.5		)	(45.5		)
Other, net	—			(4.4		)	—			(4.4		)
Net cash used in continuing operations	—			(277.7		)	(416.3		)	(694.0		)
Net cash used in discontinued operations	—			(7.5		)	(55.3		)	(62.8		)
Net cash used in investing activities	—			(285.2		)	(471.6		)	(756.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(236.9		)	—			(11.5		)	(248.4		)
Dividends paid	(69.1		)	—			—			(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(16.1		)	—			—			(16.1		)
Excess tax benefits related to share-based compensation	6.1			—			—			6.1
Other, net	6.8			—			(6.6		)	0.2
Transactions with affiliates, net	220.2			(438.5		)	218.3			—
Net cash (used in) provided by financing activities	(89.0		)	(438.5		)	200.2			(327.3		)
Net change in cash and cash equivalents	54.1			(4.2		)	56.5			106.4
Cash and cash equivalents at beginning of period	903.8			5.2			386.2			1,295.2
Cash and cash equivalents at end of period	$	957.9		$	1.0		$	442.7		$	1,401.6

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Acquisition of Macarthur Coal Limited (Tables)

9 Months Ended

Sep. 30, 2012

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

The following table summarizes the preliminary estimated fair values of assets acquired and liabilities assumed that were recognized at the acquisition and control date, as well as provisional fair value adjustments made during the first nine months of 2012:

	Preliminary						Updated
	Allocations			Adjustments			Allocations
	(Dollars in millions)
Accounts receivable, net	$	106.6		$	8.8		$	115.4
Inventories	67.1			(10.5		)	56.6
Other current assets	137.5			(3.9		)	133.6
Property, plant, equipment and mine development	3,457.0			258.6			3,715.6
Investments and other assets	1,275.1			(184.3		)	1,090.8
Current maturities of long-term debt	(11.0		)	—			(11.0		)
Accounts payable and accrued expenses	(133.8		)	(26.1		)	(159.9		)
Long-term debt, less current maturities	(59.2		)	—			(59.2		)
Asset retirement obligations	(39.3		)	(15.2		)	(54.5		)
Other noncurrent liabilities	(31.4		)	(27.4		)	(58.8		)
Noncontrolling interests	(2,011.9		)	—			(2,011.9		)
Total purchase price, net of cash acquired of $261.2	$	2,756.7		$	—		$	2,756.7

Pro Forma Information

The following unaudited pro forma financial information presents the combined results of operations of the Company and PEA-PCI, on a pro forma basis, as though the companies had been combined as of January 1, 2010. The unaudited pro forma financial information does not necessarily reflect the results of operations that would have occurred had the Company and PEA-PCI constituted a single entity during those periods or that may be attained in the future.

	Three Months Ended		Nine Months Ended
	September 30, 2011		September 30, 2011
	(Dollars in millions, except per share amounts)
Revenue	$	2,194.1	$	6,154.7
Income from continuing operations, net of income taxes	256.0		727.6
Basic earnings per share	$	0.88	$	2.48
Diluted earnings per share	0.87		2.48

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Basis of Presentation (Policies)

9 Months Ended

Sep. 30, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Fair Value Transfer, Policy [Policy Text Block]

The Company’s policy is to value transfers between levels using the beginning of period valuation.

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Derivatives and Fair Value Measurements (Details 3) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Explosives Hedge Contracts Member	Sep. 30, 2012 Diesel Fuel Hedge Contracts [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Foreign Exchange Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Foreign Exchange Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Commodity Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Commodity Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 1[Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 1[Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 1[Member] Foreign Exchange Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 1[Member] Foreign Exchange Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 1[Member] Commodity Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 1[Member] Commodity Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 2 [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 2 [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 2 [Member] Foreign Exchange Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 2 [Member] Foreign Exchange Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 2 [Member] Commodity Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 2 [Member] Commodity Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 3 [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Foreign Exchange Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Foreign Exchange Contract [Member]	Sep. 30, 2012 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Commodity Contract [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 3 [Member] Commodity Contract [Member]
Fair value of financial asset (liability) positions measured on a recurring basis
Investment in debt and equity securities												$ 67,300,000	$ 83,500,000					$ 0	$ 0					$ 0	$ 0
Available-for-sale Securities						67,300,000	83,500,000
Derivative assets (liabilities), at fair value, net				(5,900,000)	30,900,000			511,700,000	490,600,000	25,000,000	33,000,000			0	0	0	0			511,700,000	490,600,000	25,000,000	33,000,000			0	0	0	0
Total net financial assets						604,000,000	607,100,000					67,300,000	83,500,000					536,700,000	523,600,000					0	0
Fair value, level 1 to level 2 transfers, amount	0	0	0
Fair value, level 2 to level 1 transfers, amount	$ 0	$ 0	$ 0

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Acquisition of Macarthur Coal Limited (Details) (Macarthur [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Macarthur [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables	$ 115.4	$ 115.4	$ 106.6
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory	56.6	56.6	67.1
Business combination, provisional information, initial accounting incomplete, adjustment, asset retirement obligation	3.7	3.7
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Receivable, Net		8.8
Business Acquisition, Purchase Price Allocation, Current Assets, Prepaid Expense and Other Assets	133.6	133.6	137.5
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment	3,715.6	3,715.6	3,457.0
Business Acquisition, Purchase Price Allocation, Other Noncurrent Assets	1,090.8	1,090.8	1,275.1
Business Acquisition, Purchase Price Allocation, Current Liabilities, Long-term Debt	(11.0)	(11.0)	(11.0)
Business Acquisition, Purchase Price Allocation, Current Liabilities	(159.9)	(159.9)	(133.8)
Business Acquisition, Purchase Price Allocation, Noncurrent Liabilities, Long-term Debt	(59.2)	(59.2)	(59.2)
Business Acquisition, Purchase Price, Asset Retirement Obligations	(54.5)	(54.5)	(39.3)
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities	(58.8)	(58.8)	(31.4)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory		(10.5)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Current Assets		(3.9)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, Equipment and Mine Development, Net		258.6
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Investments and Other Assets		(184.3)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Current Maturities of Long Term Debt		0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable and Accrued Expenses		(26.1)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Long Term Debt, Less Current Maturities		0
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Asset Retirement Obligations		(15.2)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Current Liabilities		(27.4)
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	(2,011.9)	(2,011.9)	(2,011.9)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncontrolling Interests		0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest	2,756.7	2,756.7	2,756.7
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Total		$ 0

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Discontinued Operations Discontinued Operations (Tables)

9 Months Ended

Sep. 30, 2012

Discontinued Operations [Abstract]

Results of discontinued operations [Table Text Block]

Results from discontinued operations were as follows during the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(Dollars in millions)
Total revenues	$	41.5	$	55.3	$	171.5	$	122.7
Loss from discontinued operations before income taxes	$	127.6	$	12.1	$	146.6	$	53.9
Income tax benefit	46.3		2.4		53.9		15.0
Loss from discontinued operations, net of income taxes	$	81.3	$	9.7	$	92.7	$	38.9

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]

Assets and liabilities classified as discontinued operations included in our condensed consolidated balance sheets were as follows:

	(Unaudited)
	September 30, 2012		December 31, 2011
	(Dollars in millions)
Assets:
Other current assets	$	48.4	$	24.6
Investments and other assets	135.2		232.2
Total assets classified as discontinued operations	$	183.6	$	256.8
Liabilities:
Accounts payable and accrued expenses	$	33.4	$	63.9
Other noncurrent liabilities	59.8		59.6
Total liabilities classified as discontinued operations	$	93.2	$	123.5

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Investments (Tables)

9 Months Ended

Sep. 30, 2012

Investments, Debt and Equity Securities [Abstract]

Investments in available-for-sale securities

Investments in available-for-sale securities at September 30, 2012 were as follows:

Available-for-sale securities	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(Dollars in millions)
Current:
Federal government securities	$	0.8	$	—	$	—		$	0.8
U.S. corporate bonds	3.4		—		—			3.4
Noncurrent:
Marketable equity securities	66.5		—		(40.0		)	26.5
Federal government securities	23.2		0.3		—			23.5
U.S. corporate bonds	12.9		0.2		—			13.1
Total	$	106.8	$	0.5	$	(40.0	)	$	67.3

Investments in available-for-sale securities at December 31, 2011 were as follows:

Available-for-sale securities	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
			(Dollars in millions)
Current:
Federal government securities	$	3.3	$	—	$	—		$	3.3
U.S. corporate bonds	3.9		—		—			3.9
Noncurrent:
Marketable equity securities	66.5		—		(9.5		)	57.0
Federal government securities	11.3		0.2		—			11.5
U.S. corporate bonds	7.7		0.1		—			7.8
Total	$	92.7	$	0.3	$	(9.5	)	$	83.5

Contractual maturities for available for sale investment in debt securities

Contractual maturities for available-for-sale investments in debt securities at September 30, 2012 were as shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

Contractual maturities for available-for-sale securities	Cost		Fair Value
	(Dollars in millions)
Due in one year or less	$	4.2	$	4.2
Due in one to five years	36.1		36.6
Total	$	40.3	$	40.8

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Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 41.6	$ 281.5	$ 427.7	$ 752.4
Unrealized holding losses on available-for-sale securities	(5.1)	(4.4)	(19.2)	(4.2)
Less: Reclassification for realized gains included in net income	0	(0.1)	0	(0.1)
Net unrealized holding losses on available-for-sale securities	(5.1)	(4.5)	(19.2)	(4.3)
Increase (decrease) in fair value of cash flow hedges	111.5	(135.9)	302.0	79.7
Less: Reclassification for realized gains included in net income	(57.7)	(61.5)	(179.2)	(180.3)
Net unrealized gains (losses) on cash flow hedges	53.8	(197.4)	122.8	(100.6)
Net actuarial loss for the period	0	0	0	3.5
Amortization of actuarial loss and prior service cost	13.9	10.2	41.6	30.2
Postretirement plan and workers compensation obligations	13.9	10.2	41.6	33.7
Foreign currency translation adjustment	13.8	0	20.4	0
Other Comprehensive Income (loss)	76.4	(191.7)	165.6	(71.2)
Comprehensive Income	118.0	89.8	593.3	681.2
Less: Comprehensive (loss) income attributable to noncontrolling interests	(1.3)	7.4	7.4	17.0
Comprehensive income attributable to common stockholders	119.3	82.4	585.9	664.2
Accumulated Other Comprehensive Income (Loss) [Member]
Net unrealized holding losses on available-for-sale securities			(19.2)
Net unrealized gains (losses) on cash flow hedges			122.8
Postretirement plan and workers compensation obligations			41.6
Foreign currency translation adjustment			$ 20.4

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Inventories (Tables)

9 Months Ended

Sep. 30, 2012

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Materials and supplies	$	157.0	$	123.7
Raw coal	162.2		108.1
Saleable coal	235.7		212.6
Total	$	554.9	$	444.4

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Earnings per Share (EPS) (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Earnings allocation method utilized in the calculation of basic and diluted EPS

The following illustrates the earnings allocation method utilized in the calculation of basic and diluted EPS:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(In millions, except per share amounts)
EPS numerator:
Income from continuing operations, net of income taxes	$	122.9		$	291.2		$	520.4		$	791.3
Less: Net (loss) income attributable to noncontrolling interests	(1.3		)	7.4			7.4			17.0
Income from continuing operations attributable to common stockholders, before allocation of earnings to participating securities	124.2			283.8			513.0			774.3
Less: Earnings from continuing operations allocated to participating    securities	0.8			1.6			3.8			4.4
Income from continuing operations attributable to common    stockholders, after allocation of earnings to participating    securities (1)	123.4			282.2			509.2			769.9
Loss from discontinued operations, net of income taxes	(81.3		)	(9.7		)	(92.7		)	(38.9		)
Less: Loss from discontinued operations allocated to participating    securities	$	(0.6	)	$	—		$	(0.8	)	$	(0.2	)
Loss from discontinued operations attributable to common     stockholders, after allocation of earnings to participating    securities (1)	$	(80.7	)	$	(9.7	)	$	(91.9	)	$	(38.7	)
Net income attributable to common stockholders, after    allocation of earnings to participating securities (1)	$	42.7		$	272.5		$	417.3		$	731.2
EPS denominator:
Weighted average shares outstanding — basic	266.2			269.2			268.5			269.0
Impact of dilutive securities	0.6			1.4			0.7			1.5
Weighted average shares outstanding — diluted	266.8			270.6			269.2			270.5
Basic EPS attributable to common stockholders:
Income from continuing operations	$	0.46		$	1.05		$	1.89		$	2.86
Loss from discontinued operations	(0.30		)	(0.04		)	(0.34		)	(0.14		)
Net income	$	0.16		$	1.01		$	1.55		$	2.72
Diluted EPS attributable to common stockholders:
Income from continuing operations	$	0.46		$	1.04		$	1.89		$	2.84
Loss from discontinued operations	(0.30		)	(0.04		)	(0.34		)	(0.13		)
Net income	$	0.16		$	1.00		$	1.55		$	2.71

⁽¹⁾  The reallocation adjustment for participating securities to arrive at the numerator used to calculate diluted EPS was less than $0.1 million for the periods presented

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Derivatives and Fair Value Measurements (Details) In Millions, unless otherwise specified		9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 Foreign Currency Contracts [Member]	Sep. 30, 2012 AUD to USD Hedge Contracts [Member] USD ($)	Sep. 30, 2012 AUD to USD Hedge Contracts [Member] AUD	Sep. 30, 2012 AUD to USD Hedge Contracts [Member] Fair value hedge [Member] AUD	Sep. 30, 2012 AUD to USD Hedge Contracts [Member] Cash flow hedges [Member] AUD	Sep. 30, 2012 AUD to USD Hedge Contracts [Member] Economic hedge [Member] AUD	Sep. 30, 2012 Diesel fuel hedge contracts [Member] USD ($) gal	Sep. 30, 2012 Diesel fuel hedge contracts [Member] Fair value hedge [Member] gal	Sep. 30, 2012 Diesel fuel hedge contracts [Member] Cash flow hedges [Member] gal	Sep. 30, 2012 Diesel fuel hedge contracts [Member] Economic hedge [Member] gal	Sep. 30, 2012 Explosives Hedge Contracts Member USD ($) MMbtu	Sep. 30, 2012 Explosives Hedge Contracts Member Fair value hedge [Member] MMbtu	Sep. 30, 2012 Explosives Hedge Contracts Member Cash flow hedges [Member] MMbtu	Sep. 30, 2012 Explosives Hedge Contracts Member Economic hedge [Member] MMbtu
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	$ 0
Company's foreign currency and commodity positions by Year of Maturity and Account Classification
Total				4,832.3	0	4,832.3	0
2012				566.1
2013				2,173.6
2014				1,513.5
2015				579.1
Total (gallons/MMbtu)								215,400,000	0	215,400,000	0	4,600,000	0	4,600,000	0
2012 (gallons/MMbtu)								27,000,000				800,000
2013 (gallons/MMbtu)								102,100,000				2,600,000
2014 (gallons/MMbtu)								63,600,000				1,200,000
2015 (gallons/MMbtu)								22,700,000				0
Fair Value Asset (Liability)			$ 511.7					$ 30.9				$ (5.9)
Timing differences between the hedge settlement and the purchase transaction		Less than a day and up to a maximum of 30 days

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Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011	Oct. 31, 2007 T
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 2,295.1			$ 2,295.1
Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Textuals) [Abstract]
Amount in letters of credit and surety bonds related to collateral for surety companies, road maintenance, performance guarantees and other operations	216.0			216.0
Time Period Of Lease That Permits The Partnership To Purchase The Terminal				30 years
Maximum capacity of the securitization program	275.0			275.0
Amount available under the securitization program	153.1			153.1
Total consideration received by Company related to accounts receivable sold under securitization program				3,210.2
Cash up front from sale of receivables				1,973.7
Additional cash upon collection of underlying receivables				874.6
Non collected receivables	362.0			362.0
Reduction in accounts receivable as a result of securitization	100.0			100.0			150.0
Expense associated with securitization transactions	0.5		0.4	1.4		1.5
Number of company operated mines included in Patriot Spin-off								8
Number of majority owned JV mines included in the Patriot spin-off								2
Number of coal preparation facilities servicing contractor-operatedines included in the Patriot spin-off								8
Proven and probable coal reserves related to Patriot (tons)								1,200,000,000
Potential exposure from Patriot bankruptcy	150			150
Patriot collateral posted with the Department of Labor							15
DTA and PBGC [Member]
Guarantee Obligations [Line Items]
Letters of Credit Outstanding, Amount	79.7			79.7
Dominion Terminal Associates Partnership [Member]
Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Textuals) [Abstract]
Equity Method Investment, Ownership Percentage	37.50%			37.50%
Number of Letters of Credit Supporting Reimbursement Obligation				4
Maximum reimbursement obligation to commercial bank related to Dominion Terminals	42.7			42.7
Pension Plans Agreement With PBG and TXU Europe [Member]
Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Textuals) [Abstract]
Letter of credit maintained by the Company in favor of the PBGC	37.0			37.0
Number of benefit pension plans	2			2
Guarantee in place from TXU Europe Limited	110.0			110.0
Reclamation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	1,819.9			1,819.9
Property Lease Guarantee [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	105.3			105.3
Workers' Compensation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	74.2			74.2
Guarantee Type, Other [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	295.7	[1]		295.7	[1]
Self bonding [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	1,221.9			1,221.9
Self bonding [Member] | Reclamation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	1,221.9			1,221.9
Self bonding [Member] | Property Lease Guarantee [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0			0
Self bonding [Member] | Workers' Compensation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0			0
Self bonding [Member] | Guarantee Type, Other [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0	[1]		0	[1]
Surety bonds [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	499.0			499.0
Surety bonds [Member] | Reclamation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	372.1			372.1
Surety bonds [Member] | Property Lease Guarantee [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	105.3			105.3
Surety bonds [Member] | Workers' Compensation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	11.8			11.8
Surety bonds [Member] | Guarantee Type, Other [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	9.8	[1]		9.8	[1]
Bank guarantees [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	430.6			430.6
Bank guarantees [Member] | Reclamation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	225.9			225.9
Bank guarantees [Member] | Property Lease Guarantee [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0			0
Bank guarantees [Member] | Workers' Compensation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0			0
Bank guarantees [Member] | Guarantee Type, Other [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	204.7	[1]		204.7	[1]
Letters of credit [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	143.6			143.6
Letters of credit [Member] | Reclamation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0			0
Letters of credit [Member] | Property Lease Guarantee [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	0			0
Letters of credit [Member] | Workers' Compensation Obligations [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	62.4			62.4
Letters of credit [Member] | Guarantee Type, Other [Member]
Guarantee Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 81.2	[1]		$ 81.2	[1]

[1] Other includes the $79.7 million in letters of credit described below and an additional $216.0 million in bank guarantees, surety bonds and letters of credit related to collateral for surety companies, road maintenance, performance guarantees and other operations.

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Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Sales	$ 1,797.2	$ 1,682.2	$ 5,282.0	$ 5,029.4
Other revenues	261.6	298.4	778.6	636.7
Total revenues	2,058.8	1,980.6	6,060.6	5,666.1
Costs and expenses
Operating costs and expenses	1,509.0	1,399.4	4,396.8	3,958.7
Depreciation, depletion and amortization	(172.5)	(108.4)	(470.7)	(317.6)
Asset retirement obligation expenses	21.1	14.6	53.3	43.3
Selling and administrative expenses	68.7	71.2	202.4	191.4
Other operating (income) loss:
Net gain on disposal or exchange of assets	(0.2)	(1.7)	(7.6)	(31.4)
Loss from equity affiliates	21.2	3.2	50.5	9.0
Operating profit	266.5	385.5	894.5	1,177.5
Interest expense	99.4	59.2	308.3	159.1
Interest income	(5.1)	(4.1)	(19.7)	(11.7)
Income from continuing operations before income taxes	(172.2)	(330.4)	(605.9)	(1,030.1)
Income tax provision	49.3	39.2	85.5	238.8
Income from continuing operations, net of income taxes	122.9	291.2	520.4	791.3
Loss from discontinued operations, net of income taxes	(81.3)	(9.7)	(92.7)	(38.9)
Net income	41.6	281.5	427.7	752.4
Less: Net (loss) income attributable to noncontrolling interests	(1.3)	7.4	7.4	17.0
Net income attributable to common stockholders	42.9	274.1	420.3	735.4
Income From Continuing Operations
Basic earnings per share	$ 0.46	$ 1.05	$ 1.89	$ 2.86
Diluted earnings per share	$ 0.46	$ 1.04	$ 1.89	$ 2.84
Net Income Attributable to Common Stockholders
Basic earnings per share	$ 0.16	$ 1.01	$ 1.55	$ 2.72
Diluted earnings per share	$ 0.16	$ 1.00	$ 1.55	$ 2.71
Dividends declared per share	$ 0.085	$ 0.085	$ 0.255	$ 0.255
Retained Earnings [Member]
Other operating (income) loss:
Net income			$ 420.3

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Acquisition of Macarthur Coal Limited Details 1 (Details) (Macarthur [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011
Macarthur [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 2,194.1	$ 6,154.7
Business Acquisition, Pro Forma Net Income (Loss)	$ 256.0	$ 727.6
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 0.88	$ 2.48
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 0.87	$ 2.48

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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011
Retained Earnings	$ 4,095.2	$ 4,095.2	$ 3,744.0
Accumulated Other Comprehensive Income (Loss)	23.2	23.2	(142.4)
Noncontrolling interests	32.4	32.4	30.7
Net income	41.6	427.7
Net Income (Loss) Attributable to Noncontrolling Interest	(1.3)	7.4
Comprehensive income:
Net unrealized losses on available-for-sale securities (net of $11.2 tax benefit)	(5.1)	(19.2)
Increase in fair value of cash flow hedges (net of $39.7 tax provision)	53.8	122.8
Postretirement plans and workers' compensation obligations (net of $24.2 tax provision)	13.9	41.6
Foreign currency translation adjustment	13.8	20.4
Dividends paid		(69.1)
Share-based compensation		34.9
Excess tax benefits related to share-based compensation		3.6
Stock options exercised		1.7
Employee stock purchases		7.1
Repurchase of employee common stock relinquished for tax withholding		(8.3)
Common stock repurchase		(99.9)
MCG Coal Holdings Pty Ltd. noncontrolling interests at conversion		53.4
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests		(49.8)
Distributions to noncontrolling interests		(5.7)
Ending Balance	5,977.0	5,977.0	5,515.8
Additional Paid-in Capital	2,284.9	2,284.9	2,234.0
Treasury Stock	(461.5)	(461.5)	353.3
Common Stock
Comprehensive income:
Share-based compensation		0
Stock options exercised		0
Employee stock purchases		0
Repurchase of employee common stock relinquished for tax withholding		0
Common stock repurchase		0
Ending Balance	2.8	2.8	2.8
Additional Paid-in Capital
Comprehensive income:
Dividends paid		0
Share-based compensation		34.9
Excess tax benefits related to share-based compensation		3.6
Stock options exercised		1.7
Employee stock purchases		7.1
Repurchase of employee common stock relinquished for tax withholding		0
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests		3.6
Ending Balance			2,234.0
Additional Paid-in Capital	2,284.9	2,284.9
Treasury Stock
Comprehensive income:
Repurchase of employee common stock relinquished for tax withholding		(8.3)
Common stock repurchase		(99.9)
Ending Balance			(353.3)
Treasury Stock	(461.5)	(461.5)
Retained Earnings
Retained Earnings	4,095.2	4,095.2
Net income		420.3
Comprehensive income:
Dividends paid		(69.1)
Ending Balance			3,744.0
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)	23.2	23.2
Comprehensive income:
Net unrealized losses on available-for-sale securities (net of $11.2 tax benefit)		(19.2)
Increase in fair value of cash flow hedges (net of $39.7 tax provision)		122.8
Postretirement plans and workers' compensation obligations (net of $24.2 tax provision)		41.6
Foreign currency translation adjustment		20.4
Ending Balance			(142.4)
Noncontrolling Interests
Noncontrolling interests	32.4	32.4
Comprehensive income:
Net unrealized losses on available-for-sale securities (net of $11.2 tax benefit)		0
Increase in fair value of cash flow hedges (net of $39.7 tax provision)		0
Postretirement plans and workers' compensation obligations (net of $24.2 tax provision)		0
Foreign currency translation adjustment		0
MCG Coal Holdings Pty Ltd. noncontrolling interests at conversion		53.4
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests		(53.4)
Distributions to noncontrolling interests		(5.7)
Ending Balance			$ 30.7

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Coal Trading (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011
Fair value of financial asset (liability) positions measured on a recurring basis
Assets from coal trading activities, net	$ 56.2			$ 56.2			$ 44.6
Liabilities from coal trading activities, Net Basis	(19.9)			(19.9)			(10.3)
Coal Trading [Member]
Fair value of financial asset (liability) positions measured on a recurring basis
Assets from coal trading activities, Gross Basis	444.8			444.8			170.4
Assets from coal trading activities, net	56.2			56.2			44.6
Liabilities from coal trading activities, Gross Basis	(216.6)			(216.6)			(84.0)
Liabilities from coal trading activities, Net Basis	(19.9)			(19.9)			(10.3)
Subtotal, Gross Basis	228.2			228.2			86.4
Subtotal, Net Basis	36.3			36.3			34.3
Net margin held, Gross Basis	191.9	[1]		191.9	[1]		52.1	[1]
Net margin held, Net Basis	0	[1]		0	[1]		0	[1]
Net value of coal trading positions, Gross Basis	36.3			36.3			34.3
Net value of coal trading positions, Net Basis	36.3			36.3			34.3
Trading revenue
Trading revenue	40.3		29.0	132.8		34.3
Commodity swaps and options [Member] | Coal Trading [Member]
Trading revenue
Trading revenue	60.3		(0.6)	110.9		(26.6)
Physical commodity purchase / sale contracts [Member] | Coal Trading [Member]
Trading revenue
Trading revenue	$ (20.0)		$ 29.6	$ 21.9		$ 60.9

[1] (1) Represents margin held from exchanges of $191.9 million and $52.1 million at September 30, 2012 and December 31, 2011, respectively. Approximately $100 million and $23 million of the margin held at September 30, 2012 and December 31, 2011, respectively, related to cash flow hedges.

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Financing Receivables (Tables)

9 Months Ended

Sep. 30, 2012

Financing Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

The Company had total financing receivables of $385.1 million and $376.1 million at September 30, 2012 and December 31, 2011, respectively, which consisted of the following:

Balance Sheet Classification	September 30, 2012		December 31, 2011
	(Dollars in millions)
Accounts receivable, net	$	9.8	$	51.3
Other current assets	—		65.0
Investments and other assets	375.3		259.8
Total financing receivables	$	385.1	$	376.1

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Income Taxes Details Textuals (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Jun. 30, 2012 Parent Company [Member]
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions		$ 13.5
Unrecognized Tax Benefits, Interest on Income Taxes Expense	2.2	19.4
MRRT Effective tax rate	22.50%	22.50%
MRRT market value starting base deferred tax asset		0
Income tax benefit PEA-PCI			59.7
Deferred Tax Liab PEA-PCI			14.6
Reduction in val allowance PEA-PCI			$ 45.1

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Other Commercial Events

9 Months Ended

Sep. 30, 2012

Other Commercial Events [Abstract]

Other Commercial Events

Other Commercial Events

Prairie State Energy Campus (Prairie State)

A subsidiary of the Company owns a 5.06% undivided interest in Prairie State, a 1,600 megawatt coal-fueled electricity generation project under construction in Washington, St. Clair and Randolph counties in Illinois. On June 6, 2012, the first of two 800 megawatt electricity generation units (Unit 1) commenced commercial operations. Accordingly, the Company reclassified $156.6 million from "Investments and other assets" to operating assets and liabilities in the condensed consolidated balance sheet as follows (in millions):

Inventories	$	3.6
Property, plant, equipment and mine development	153.8
Accounts payable and accrued expenses	(0.8		)
Total, net	$	156.6

Subsequent to June 6, 2012, the 5.06% share of the results of operations of Unit 1 have been included in the Company's condensed consolidated statements of income.

Included in "Investments and other assets" in the condensed consolidated balance sheet as of September 30, 2012 are costs of $88.1 million related to the Company's investment in the second of two 800 megawatt electricity generation units (Unit 2).

In June 2011, the Company recognized income associated with the receipt of a $14.6 million project development fee associated with Prairie State, classified in "Other revenues" in the unaudited condensed consolidated statement of operations for the nine months ended September 30, 2011.

Coal Reserves

In June 2011, the Company exchanged coal reserves in Kentucky and coal reserves and surface lands in Illinois for coal reserves in West Virginia in a nonmonetary exchange with a third party. Based on the fair value of the coal reserves received, the Company recognized a gain of $23.5 million on the exchange. Fair value was determined using a discounted cash flow model that included assumptions surrounding future coal sales prices, operating costs and discount rate. Based on the non-cash nature of the transaction, there was no impact to the investing section of the Company's unaudited condensed consolidated statement of cash flows.

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2012

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The following is a reconciliation of the expected statutory federal income tax provision to the Company’s actual income tax provision:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Expected income tax provision at federal statutory rate	$	60.2		$	115.6		$	212.1		$	360.6
Excess depletion	(16.7		)	(17.0		)	(58.8		)	(53.0		)
Foreign earnings provision differential	(17.5		)	(23.8		)	(72.0		)	(74.3		)
Remeasurement of foreign income tax accounts	13.6			(38.7		)	8.7			(16.9		)
State income taxes, net of U.S. federal tax benefit	4.4			2.9			15.5			9.2
General business tax credits	(13.5		)	(4.4		)	(47.6		)	(12.7		)
Changes in valuation allowance	4.1			2.5			(30.9		)	7.0
Changes in tax reserves	8.6			6.0			21.9			10.8
Other, net	6.1			(3.9		)	36.6			8.1
Total provision	$	49.3		$	39.2		$	85.5		$	238.8

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Financial Instruments and Guarantees with Off-Balance-Sheet Risk

9 Months Ended

Sep. 30, 2012

Financial Instruments And Guarantees With Off Balance Sheet Risk Disclosure [Abstract]

Financial Instruments and Guarantees with Off-Balance-Sheet Risk

Financial Instruments and Guarantees with Off-Balance Sheet Risk

In the normal course of business, the Company is a party to guarantees and financial instruments with off-balance-sheet risk, which are not reflected in the accompanying condensed consolidated balance sheets. Such financial instruments are valued based on the amount of exposure under the instrument and the likelihood of required performance. In the Company’s past experience, virtually no claims have been made against these financial instruments. Management does not expect any material losses to result from these guarantees or off-balance-sheet instruments.

Financial Instruments with Off-Balance Sheet Risk

As of September 30, 2012, the Company had the following financial instruments with off-balance sheet risk:

	Reclamation Obligations		Lease Obligations		Workers’ Compensation Obligations		Other(1)		Total
	(Dollars in millions)
Self bonding	$	1,221.9	$	—	$	—	$	—	$	1,221.9
Surety bonds	372.1		105.3		11.8		9.8		499.0
Bank guarantees	225.9		—		—		204.7		430.6
Letters of credit	—		—		62.4		81.2		143.6
	$	1,819.9	$	105.3	$	74.2	$	295.7	$	2,295.1

⁽¹⁾  Other includes the $79.7 million in letters of credit described below and an additional $216.0 million in bank guarantees, surety bonds and letters of credit related to collateral for surety companies, road maintenance, performance guarantees and other operations.

The Company owns a 37.5% interest in Dominion Terminal Associates, a partnership that operates a coal export terminal in Newport News, Virginia under a 30-year lease that permits the partnership to purchase the terminal at the end of the lease term for a nominal amount. The partners have severally (but not jointly) agreed to make payments under various agreements which in the aggregate provide the partnership with sufficient funds to pay rents and to cover the principal and interest payments on the floating-rate industrial revenue bonds issued by the Peninsula Ports Authority, and which are supported by letters of credit from a commercial bank. As of September 30, 2012, the Company’s maximum reimbursement obligation to the commercial bank was in turn supported by four letters of credit totaling $42.7 million.

The Company is party to an agreement with the PBGC and TXU Europe Limited, an affiliate of the Company’s former parent corporation, under which the Company is required to make special contributions to two of the Company’s defined benefit pension plans and to maintain a $37.0 million letter of credit in favor of the PBGC. If the Company or the PBGC gives notice of an intent to terminate one or more of the covered pension plans in which liabilities are not fully funded, or if the Company fails to maintain the letter of credit, the PBGC may draw down on the letter of credit and use the proceeds to satisfy liabilities under the Employee Retirement Income Security Act of 1974, as amended. The PBGC, however, is required to first apply amounts received from a $110.0 million guarantee in place from TXU Europe Limited in favor of the PBGC before it draws on the Company’s letter of credit. On November 19, 2002, TXU Europe Limited was placed under the administration process in the U.K. (a process similar to bankruptcy proceedings in the U.S.) and continues under this process as of September 30, 2012. As a result of these proceedings, TXU Europe Limited may be liquidated or otherwise reorganized in such a way as to relieve it of its obligations under its guarantee.

Accounts Receivable Securitization

The Company has an accounts receivable securitization program (securitization program) with a maximum capacity of $275.0 million through its wholly owned, bankruptcy-remote subsidiary (Seller). At September 30, 2012, the Company had $153.1 million remaining capacity available under the securitization program, net of outstanding letters of credit and amounts drawn. Under the securitization program, the Company contributes trade receivables of most of the Company's U.S. subsidiaries on a revolving basis to the Seller, which then sells the receivables in their entirety to a consortium of unaffiliated asset-backed commercial paper conduits (the Conduits). After the sale, the Company, as servicer of the assets, collects the receivables on behalf of the Conduits for a nominal servicing fee. The Company utilizes proceeds from the sale of its accounts receivable as an alternative to short-term borrowings under the revolving credit facility portion of the Company’s Credit Facility, effectively managing its overall borrowing costs and providing an additional source of working capital. The securitization program extends to May 2013, while the letter of credit commitment that supports the commercial paper facility underlying the securitization program must be renewed annually.

The Seller is a separate legal entity whose assets are available first and foremost to satisfy the claims of its creditors. Of the receivables sold to the Conduits, a portion of the amount due to the Seller is deferred until the ultimate collection of the underlying receivables. During the nine months ended September 30, 2012, the Company received total consideration of $3,210.2 million related to accounts receivable sold under the securitization program, including $1,973.7 million of cash up front from the sale of the receivables, an additional $874.6 million of cash upon the collection of the underlying receivables and $362.0 million that had not been collected at September 30, 2012 and was recorded at carrying value, which approximates fair value. The reduction in accounts receivable as a result of securitization activity with the Conduits was $100.0 million and $150.0 million at September 30, 2012 and December 31, 2011, respectively.

The securitization activity has been reflected in the unaudited condensed consolidated statements of cash flows as an operating activity because both the cash received from the Conduits upon sale of the receivables as well as the cash received from the Conduits upon the ultimate collection of the receivables are not subject to significantly different risks given the short-term nature of the Company’s trade receivables. The Company recorded expense associated with securitization transactions of $0.5 million and $0.4 million for the three months ended September 30, 2012 and 2011, respectively, and $1.4 million and $1.5 million for the nine months ended September 30, 2012 and 2011, respectively.

Patriot Bankruptcy

On October 31, 2007, the Company spun-off companies that constituted portions of its former Eastern U.S. Mining operations business segment to form Patriot Coal Corporation (Patriot). The spin-off included eight company-operated mines, two majority-owned joint venture mines and numerous contractor-operated mines serviced by eight coal preparation facilities, along with 1.2 billion tons of proven and probable coal reserves. On July 9, 2012, Patriot and certain of its wholly owned subsidiaries filed voluntary petitions for reorganization under Chapter 11 of the U.S. Code in the U.S. Bankruptcy Court for the Southern District of New York.

The Company believes that its only material exposure to the bankruptcy of Patriot relates to up to $150 million in possible federal and state black lung occupational disease liabilities. As Patriot noted in its Annual Report on Form 10-K/A for the year ended December 31, 2011, it has posted $15 million in collateral with the U.S. Department of Labor (DOL) in exchange for the right to self-insure its liabilities under the Federal Coal Mine Health and Safety Act of 1969 (Black Lung Act). If Patriot is unable to meet its black lung liability obligations, the Company believes that the DOL will first look to this collateral for payment. The Black Lung Act allows the DOL to seek recovery from other potentially liable operators as well. The Company may be considered a potentially liable operator for purposes of the Black Lung Act with respect to the black lung liabilities of Patriot at the time of the spin-off.

The Company also has a small number of commercial arrangements with Patriot and believes its potential exposure under these agreements will not have a material adverse effect on its consolidated results of operations, financial condition or cash flows.

Other

The Company is the lessee under numerous equipment and property leases. It is common in such commercial lease transactions for the Company, as the lessee, to agree to indemnify the lessor for the value of the property or equipment leased, should the property be damaged or lost during the course of the Company’s operations. The Company expects that losses with respect to leased property, if any, would be covered by insurance (subject to deductibles). The Company and certain of its subsidiaries have guaranteed other subsidiaries’ performance under various lease obligations. Aside from indemnification of the lessor for the value of the property leased, the Company’s maximum potential obligations under its leases are equal to the respective future minimum lease payments, and the Company assumes that no amounts could be recovered from third parties.

The Company has provided financial guarantees under certain long-term debt agreements entered into by its subsidiaries and substantially all of the Company’s U.S. subsidiaries provide financial guarantees under long-term debt agreements entered into by the Company. The maximum amounts payable under the Company’s debt agreements are equal to the respective principal and interest payments.

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Pension and Postretirement Benefit Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Pension Plans, Defined Benefit [Member]
Components of net periodic benefit costs
Service cost for benefits earned	$ 0.5	$ 0.4	$ 1.5	$ 1.3
Defined Benefit Plan Interest Cost	11.7	12.4	35.1	37.3
Expected return on plan assets	(15.9)	(16.1)	(47.8)	(48.3)
Amortization of prior service cost	0.3	0.3	0.8	0.8
Amortization of actuarial loss	12.1	7.5	36.4	22.5
Defined Benefit Plan Net Periodic Benefit Cost	8.7	4.5	26.0	13.6
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit costs
Service cost for benefits earned	3.6	3.5	10.9	9.8
Defined Benefit Plan Interest Cost	13.7	14.5	41.2	43.4
Amortization of prior service cost	0.7	0.8	1.7	1.6
Amortization of actuarial loss	8.1	6.7	24.5	20.2
Defined Benefit Plan Net Periodic Benefit Cost	$ 26.1	$ 25.5	$ 78.3	$ 75.0

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Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Comprehensive income:
Net unrealized losses on available-for-sale securities, tax benefit	$ (11.2)
Cash flow hedges, tax provision	39.7
Postretirement plans and workers' compensation obligations, tax provision	$ 24.2

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Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 648.0	$ 799.1
Accounts receivable, net of allowance for doubtful accounts of $15.2 at September 30, 2012 and $17.0 at December 31, 2011	682.2	922.5
Inventories	554.9	444.4
Assets from coal trading activities, net	56.2	44.6
Deferred income taxes	15.8	27.3
Other current assets	697.6	768.0
Total current assets	2,654.7	3,005.9
Property, plant, equipment and mine development
Land and coal interests	11,875.2	10,630.5
Buildings and improvements	1,268.3	1,084.2
Machinery and equipment	3,175.8	2,857.3
Less: accumulated depreciation, depletion and amortization	(3,808.2)	(3,320.4)
Property, plant, equipment and mine development, net	12,511.1	11,251.6
Investments and other assets	1,684.6	2,475.5
Total assets	16,850.4	16,733.0
Current liabilities
Current maturities of long-term debt	124.8	101.1
Liabilities from coal trading activities, net	19.9	10.3
Accounts payable and accrued expenses	1,645.1	1,712.3
Total current liabilities	1,789.8	1,823.7
Long-term debt, less current maturities	6,238.3	6,556.4
Deferred income taxes	385.0	523.2
Asset retirement obligations	662.4	615.2
Accrued postretirement benefit costs	1,054.3	1,053.1
Other noncurrent liabilities	743.6	645.6
Total liabilities	10,873.4	11,217.2
Stockholders' equity
Additional paid-in capital	2,284.9	2,234.0
Retained earnings	4,095.2	3,744.0
Accumulated other comprehensive Income (Loss)	23.2	(142.4)
Treasury shares, at cost: 13.7 shares as of September 30, 2012 and 9.2 shares as of December 31, 2011	461.5	(353.3)
Peabody Energy Corporation's stockholders' equity	5,944.6	5,485.1
Noncontrolling interests	32.4	30.7
Total stockholders' equity	5,977.0	5,515.8
Total liabilities and stockholders' equity	16,850.4	16,733.0
Preferred Stock [Member]
Stockholders' equity
Preferred Stock	0	0
Series A Junior Participating Preferred Stock [Member]
Stockholders' equity
Preferred Stock		0
Perpetual Preferred Stock
Stockholders' equity
Preferred Stock	0	0
Series Common Stock
Stockholders' equity
Common Stock	0	0
Common Stock [Member]
Stockholders' equity
Common Stock	2.8	2.8
Noncontrolling Interest [Member]
Stockholders' equity
Noncontrolling interests	32.4
Total stockholders' equity		$ 30.7

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Coal Trading

9 Months Ended

Sep. 30, 2012

Coal Trading [Abstract]

Coal Trading

Coal Trading

The Company engages in direct and brokered trading of coal, ocean freight and fuel-related commodities in over-the-counter markets (coal trading), some of which is subsequently exchange-cleared and some of which is bilaterally settled. Except those for which the Company has elected to apply a normal purchases and normal sales exception, all derivative coal trading contracts are accounted for at fair value.

The Company's policy is to include instruments associated with coal trading transactions as a part of its trading book. Trading revenues from such transactions are recorded in “Other revenues” in the unaudited condensed consolidated statements of income and include realized and unrealized gains and losses on derivative instruments, including coal deliveries related to contracts accounted for under the normal purchases and normal sales exception. Therefore, the Company has elected the trading exemption surrounding disclosures related to its coal trading activities.

Trading revenues recognized during the three and nine months ended September 30, 2012 and 2011 were as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
Trading Revenues by Type of Instrument	2012			2011			2012		2011
	(Dollars in millions)
Commodity swaps and options	$	60.3		$	(0.6	)	$	110.9	$	(26.6	)
Physical commodity purchase/sale contracts	(20.0		)	29.6			21.9		60.9
Total trading revenues	$	40.3		$	29.0		$	132.8	$	34.3

Risk Management

Hedge Ineffectiveness. The Company assesses, both at inception and at least quarterly thereafter, whether the derivatives used in hedging activities are highly effective at offsetting the changes in the anticipated cash flows of the hedged item. The effective portion of the change in the fair value is recorded in “Accumulated other comprehensive income” until the hedged transaction impacts reported earnings, at which time gains and losses are also reclassified to earnings. To the extent that periodic changes in the fair value of a derivative exceeds the changes in the hedged item to which it has been designated, the ineffective portion is recorded in earnings in the period of the change. If the hedge ceases to qualify for hedge accounting, the Company prospectively recognizes the changes in fair value of the instrument in earnings in the period of the change.

In some instances, the Company has designated an existing coal trading derivative as a hedge and, thus, the derivative has a non-zero fair value at hedge inception. The “off-market” nature of these derivatives, which is best described as an embedded financing element within the derivative, is a source of ineffectiveness. In other instances, the Company uses a coal trading derivative that settles at a different time, has different quality specifications or has a different location basis than the occurrence of the cash flow being hedged. These collectively yield ineffectiveness to the extent that the derivative hedge contract does not exactly offset changes in the fair value or expected cash flows of the hedged item.

Forecasted Transactions No Longer Probable. During the nine months ended September 30, 2012, the Company reclassified net gains of $7.1 million out of “Accumulated other comprehensive income (loss)” to earnings as the underlying forecasted transactions were deemed no longer probable of occurring. Approximately $4.5 million of this amount relates to disruptions to forecasted transactions due to the bankruptcy declaration of a counterparty to certain of our physical purchase contracts during the third quarter of 2012.

Fair Value Measurements

The fair value of assets and liabilities from coal trading activities is set forth below:

	September 30, 2012						December 31, 2011
	Gross Basis			Net Basis			Gross Basis			Net Basis
	(Dollars in millions)
Assets from coal trading activities	$	444.8		$	56.2		$	170.4		$	44.6
Liabilities from coal trading activities	(216.6		)	(19.9		)	(84.0		)	(10.3		)
Subtotal	228.2			36.3			86.4			34.3
Net margin held (1)	(191.9		)	—			(52.1		)	—
Net value of coal trading positions	$	36.3		$	36.3		$	34.3		$	34.3

⁽¹⁾  Represents margin held from exchanges of $191.9 million and $52.1 million at September 30, 2012 and December 31, 2011, respectively. Approximately $100 million and $23 million of the margin held at September 30, 2012 and December 31, 2011, respectively, related to cash flow hedges.

The Company’s trading assets and liabilities are generally comprised of forward contracts, financial swaps and margin. The gross fair value of coal trading positions designated as cash flow hedges of forecasted sales was an asset of $185.1 million and $22.4 million as of September 30, 2012 and December 31, 2011, respectively. The increase in the fair value of coal trading positions designated as cash flow hedges of forecasted sales was predominantly driven by a decrease in the associated price levels in international thermal coal markets during the period.

The following tables set forth the hierarchy of the Company’s net financial asset (liability) coal trading positions for which fair value is measured on a recurring basis:

	September 30, 2012
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Commodity swaps and options	$	2.0	$	31.9	$	—	$	33.9
Physical commodity purchase/sale contracts	—		1.5		0.9		2.4
Total net financial assets	$	2.0	$	33.4	$	0.9	$	36.3

	December 31, 2011
	Level 1		Level 2			Level 3		Total
	(Dollars in millions)
Commodity swaps and options	$	21.2	$	(1.9	)	$	—	$	19.3
Physical commodity purchase/sale contracts	—		6.3			8.7		15.0
Total net financial assets	$	21.2	$	4.4		$	8.7	$	34.3

For Level 1 and 2 financial assets and liabilities, the Company utilizes both direct and indirect observable price quotes, including U.S. interest rate curves, LIBOR yield curves, Chicago Mercantile Exchange (CME), Intercontinental Exchange indices (ICE), NOS Clearing ASA, LCH.Clearnet (formerly known as the London Clearing House), Singapore Exchange (SGX), broker quotes, published indices and other market quotes. Below is a summary of the Company’s valuation techniques for Level 1 and 2 financial assets and liabilities:

• Commodity swaps and options: generally valued based on unadjusted quoted prices in active markets (Level 1) or a valuation that is corroborated by the use of market-based pricing (Level 2).

• Physical commodity purchase/sale contracts: purchases and sales at locations with significant market activity corroborated by market-based information (Level 2).

Physical commodity purchase/sale contracts transacted in less liquid markets or contracts, such as long-term arrangements with limited price availability, are classified in Level 3. Indicators of less liquid markets are those with periods of low trade activity or wide pricing spreads between broker quotes.

The Company's risk management function, which is independent of the Company's commercial trading function, is responsible for valuation policies and procedures, with oversight from executive management. Generally, the Company's Level 3 instruments or contracts are valued using bid/ask price quotations and other market assessments obtained from multiple, independent third-party brokers or other transactional data incorporated into internally-generated discounted cash flow models. While the Company does not anticipate any decrease in the number of third-party brokers or market liquidity, the occurrence of such events could erode the quality of market information and therefore the valuation of its market positions. The Company's valuation techniques include basis adjustments to the foregoing price inputs for quality, such as heat rate, sulfur content and ash content; location differentials, expressed as port and freight costs, and credit and nonperformance risk. The Company's risk management function independently validates the Company's valuation inputs, including unobservable inputs, with third-party information and settlement prices from other sources where available. A daily process is performed to analyze market price changes and changes to the portfolio. Further periodic validation occurs at the time contracts are settled with the counterparty. These valuation techniques have been consistently applied in all periods presented, and the Company believes it has obtained the most accurate information available for the types of derivative contracts held.

The following table summarizes the quantitative unobservable inputs utilized by the Company's internally-developed valuation models for physical commodity purchase/sale contracts classified as Level 3 as of September 30, 2012:

	Range				Weighted
	Low		High		Average
Quality adjustments	2	%	22	%	14	%
Location differentials	6	%	40	%	25	%
Non-performance adjustments	4	%	4	%	4	%

Significant increases or decreases in the inputs in isolation could result in a significantly higher or lower fair value measurement. The unobservable inputs do not have a direct interrelationship; therefore, a change in one unobservable input would not necessarily correspond with a change in another unobservable input.

The following table summarizes the changes in the Company’s recurring Level 3 net financial assets:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Beginning of period	$	2.9		$	9.9		$	8.7		$	18.6
Total net gains (losses) realized/unrealized:
Included in earnings	2.4			(1.4		)	12.8			10.7
Settlements	(4.4		)	(1.3		)	(20.6		)	(3.1		)
Transfers out	—			1.0			—			(18.0		)
End of period	$	0.9		$	8.2		$	0.9		$	8.2

The following table summarizes the changes in net unrealized gains relating to Level 3 net financial assets held both as of the beginning and the end of the period:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
	(Dollars in millions)
Changes in net unrealized gains (1)	$	0.2	$	(1.1	)	$	(3.5	)	$	8.7

⁽¹⁾  Within the unaudited condensed consolidated statements of income and unaudited condensed consolidated statements of comprehensive income for the periods presented, unrealized gains and losses from Level 3 items are combined with unrealized gains and losses on positions classified in Level 1 or 2, as well as other positions that have been realized during the applicable periods.

The Company did not have any significant transfers in its coal trading positions between Level 1 and Level 2 during the nine months ended September 30, 2012 or 2011. There were no transfers in or out of Level 3 during the three and nine months ended September 30, 2012. During the three and nine months ended September 30, 2011, certain of the Company's physical commodity purchase/sale contracts were transferred from Level 3 to Level 2 as the settlement dates entered a more liquid market. The Company’s policy is to value transfers between levels using the beginning of period valuation.

Based on the net fair value of the Company’s coal trading positions held in “Accumulated other comprehensive income (loss)” at September 30, 2012, unrealized gains to be reclassified from comprehensive income to earnings over the next 12 months are expected to be approximately $137 million. As these unrealized gains are associated with derivative instruments that represent hedges of forecasted transactions, the amounts reclassified to earnings may partially offset the realized transactions in the unaudited condensed consolidated statements of income.

As of September 30, 2012, the timing of the estimated future realization of the value of the Company’s trading portfolio was as follows:

Year of	Percentage of
Expiration	Portfolio Total
2012	28	%
2013	61	%
2014	10	%
2015	1	%
	100	%

Nonperformance and Credit Risk. The fair value of the Company’s coal derivative assets and liabilities reflects adjustments for nonperformance and credit risk. The Company’s exposure is substantially with electric utilities, steel producers, energy marketers and energy producers. The Company’s policy is to independently evaluate each customer’s creditworthiness prior to entering into transactions and to regularly monitor the credit extended. If the Company engages in a transaction with a counterparty that does not meet its credit standards, the Company seeks to protect its position by requiring the counterparty to provide an appropriate credit enhancement. Also, when appropriate (as determined by its credit management function), the Company has taken steps to reduce its exposure to customers or counterparties whose credit has deteriorated and who may pose a higher risk of failure to perform under their contractual obligations. These steps include obtaining letters of credit or cash collateral (margin), requiring prepayments for shipments or the creation of customer trust accounts held for the Company’s benefit to serve as collateral in the event of a failure to pay or perform. To reduce its credit exposure related to trading and brokerage activities, the Company seeks to enter into netting agreements with counterparties that permit the Company to offset asset and liability positions with such counterparties and, to the extent required, will post or receive margin amounts associated with exchange-cleared positions.

At September 30, 2012, 88% of the Company’s credit exposure related to coal trading activities was with investment grade counterparties while 9% was with non-investment grade counterparties and 3% was with counterparties that are not rated.

Performance Assurances and Collateral

Certain of the Company’s derivative trading instruments require the parties to provide additional performance assurances whenever a material adverse event jeopardizes one party’s ability to perform under the instrument. If the Company was to sustain a material adverse event (using commercially reasonable standards), the counterparties could request collateralization on derivative trading instruments in net liability positions which, based on an aggregate fair value at September 30, 2012 and December 31, 2011, would have amounted to collateral postings to counterparties of approximately $11 million as of both dates. As of September 30, 2012 and December 31, 2011, no collateral was posted to counterparties for such positions.

Certain of the Company’s other derivative trading instruments require the parties to provide additional performance assurances whenever a credit downgrade occurs below a certain level as specified in each underlying contract. The terms of such derivative trading instruments typically require additional collateralization, which is commensurate with the severity of the credit downgrade. If a credit downgrade were to have occurred below contractually specified levels, the Company’s additional collateral requirement owed to its counterparties would have been less than $1 million at September 30, 2012 and December 31, 2011 based on the aggregate fair value of all derivative trading instruments with such features that were in a net liability position. No affiliated margin was posted for these transactions as of September 30, 2012 and December 31, 2011.

The Company is required to post collateral on positions that are in a net liability position with an exchange and is entitled to receive collateral on positions that are in a net asset position. This collateral is known as variation margin. At September 30, 2012 and December 31, 2011, the Company was in a net asset position of $191.9 million and $52.1 million, respectively (reflected in “Assets from coal trading activities, net”).

In addition, the Company is required by an exchange to post certain collateral, known as initial margin, which represents an estimate of potential future adverse price movements across the Company’s portfolio under normal market conditions. As of September 30, 2012 and December 31, 2011, the Company had posted initial margin of $26.6 million and $34.0 million, respectively (reflected in “Other current assets”). In addition, the Company had posted $1.7 million of margin in excess of the exchange-required variation (discussed above) and initial margin as of September 30, 2012 (also reflected in “Other current assets”).

MF Global UK Limited

In October 2011, MF Global UK Limited (MF Global UK), a United Kingdom (U.K.) based broker-dealer, was placed into the U.K.'s administration process (a process similar to bankruptcy proceedings in the U.S.) by the Financial Services Authority following the Chapter 11 bankruptcy filing of its U.S. parent, MF Global Holdings Ltd. The Company had used MF Global UK to broker certain of its coal trading transactions. The interruption of the Company's trading operations was limited as the Company opened new accounts with different brokerage firms and transferred its open trading positions formerly held with MF Global UK to those new accounts. While the open trading positions were transferred from MF Global UK successfully, the related margin posted by the Company was retained by MF Global UK pending resolution of the Company's claims with the special administrators.

Through August 2012, the Company had received $20.0 million of the initial outstanding amount of $52.1 million that was held with MF Global UK when it was placed into the U.K.'s administration process. In September 2012, the Company sold its remaining claim with the special administrators to a third party on a discounted basis for $28.0 million. As a result, the Company recognized a loss of $4.1 million on the sale of its claim during the three and nine months ended September 30, 2012.

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Document and Entity Information Document	9 Months Ended
	Sep. 30, 2012	Nov. 02, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	PEABODY ENERGY CORP
Entity Central Index Key	0001064728
Document Type	10-Q
Document Period End Date	Sep. 30, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		268,385,935

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Financing Receivables

9 Months Ended

Sep. 30, 2012

Financing Receivables [Abstract]

Financing Receivables [Text Block]

Financing Receivables

The Company had total financing receivables of $385.1 million and $376.1 million at September 30, 2012 and December 31, 2011, respectively, which consisted of the following:

Balance Sheet Classification	September 30, 2012		December 31, 2011
	(Dollars in millions)
Accounts receivable, net	$	9.8	$	51.3
Other current assets	—		65.0
Investments and other assets	375.3		259.8
Total financing receivables	$	385.1	$	376.1

The Company periodically assesses the collectability of accounts and loans receivable by considering factors such as specific evaluation of collectability, historical collection experience, the age of the receivable and other available evidence. Below is a description of the Company's financing receivables at September 30, 2012.

Codrilla Mine Project. In 2011, a wholly owned subsidiary of PEA-PCI, then Macarthur Coal Limited, completed the sale of its 85% interest in the Codrilla Mine Project to participants of the Coppabella Moorvale Joint Venture (CMJV) where PEA-PCI sold down its interest in the Codrilla project to the CMJV (Codrilla sell down) so that, following completion of the sale, ownership of the Codrilla Mine Project reflected the existing ownership of the Coppabella and Moorvale mines with PEA-PCI retaining a 73.3% ownership. Prior to the acquisition of PEA-PCI by the Company, consideration of $15.0 million Australian dollars was received by PEA-PCI upon completion of the Codrilla sell down, representing 20% of the agreed price. Two installments, for which the Company holds non-interest-bearing receivables, are due upon the completion of certain milestones. The first installment, with 40% due on the granting of the related mining lease, was received during the three months ended September 30, 2012. The final 40% is due upon the mine's first coal shipment. At December 31, 2011, the first installment of $34.2 million was included in "Accounts receivable, net" in the condensed consolidated balance sheet which was collected from CMJV participants in the third quarter 2012 when the mining lease was granted and is reflected in "Proceeds from disposal of assets" in the condensed consolidated statements of cash flows for the nine months ended September 30, 2012. There are currently no indications of impairment on the remaining installment and the Company expects to receive full payment upon the mine's first shipment. The remaining balance associated with these receivables is recorded in "Investments and other assets" which was $36.2 million and $35.6 million at September 30, 2012 and December 31, 2011, respectively, in the condensed consolidated balance sheets.

Middlemount Mine. The Company periodically makes loans to the Middlemount Mine joint venture (Middlemount) for the purposes of funding capital expenditures and working capital requirements, in line with the related shareholders’ agreement. Middlemount intends to pay down the loans as excess cash is generated as required by the shareholders’ agreement. The loans bear interest at a rate equal to the monthly average 30-day Australian Bank Bill Swap Reference Rate plus 3.5%. There are currently no indications of impairment and the Company expects to receive full payment of amounts due. "Other current assets" included $65.0 million at December 31, 2011, which was reclassified to "Investments and other assets" during the nine months ended September 30, 2012. "Investments and other assets" included $339.1 million and $224.2 million at September 30, 2012 and December 31, 2011, respectively, in the condensed consolidated balance sheets related to these loans.

Other Financing Receivables. From time to time, the Company may enter into transactions resulting in accounts or notes receivable held by the Company. These notes are generally short term in nature with positive historical collection experience and do not represent a material credit risk to the Company.

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets
Allowance for doubtful accounts receivable, current	$ 15.2	$ 17.0
Stockholders' equity
Treasury Stock, shares	13,700,000	9,200,000
Preferred Stock [Member]
Stockholders' equity
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000,000	10,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Series A Junior Participating Preferred Stock [Member]
Stockholders' equity
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	0	1,500,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Perpetual Preferred Stock Member
Stockholders' equity
Preferred Stock, shares authorized	800,000	800,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Series Common Stock Member
Stockholders' equity
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	40,000,000	40,000,000
Common Stock, shares issued	0	0
Common Stock, shares outstanding	0	0
Common Stock [Member]
Stockholders' equity
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	800,000,000	800,000,000
Common Stock, shares issued	282,000,000	280,300,000
Common Stock, shares outstanding	268,300,000	271,100,000

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Acquisition of Macarthur Coal Limited

9 Months Ended

Sep. 30, 2012

Business Combinations [Abstract]

Acquisition of Macarthur Coal Limited

Acquisition of Macarthur Coal Limited

On October 23, 2011, PEAMCoal Pty Ltd (PEAMCoal), an Australian company that was then indirectly owned 60% by the Company and 40% by ArcelorMittal, acquired a majority interest in Macarthur Coal Limited (PEA-PCI or the acquiree) through an all cash off-market takeover offer. On October 26, 2011 (the acquisition and control date), the Company appointed its nominees to the acquiree's Board of Directors and executive management team. The acquisition was completed on December 20, 2011 as PEAMCoal acquired all of the acquirees's remaining outstanding shares of common stock for $4.8 billion, net of $261.2 million of acquired cash, of which the Company's share was $2.8 billion (PEA-PCI acquisition). PEAMCoal accounted for share acceptances under the takeover process as a single transaction occurring on October 26, 2011. On December 21, 2011, the Company acquired ArcelorMittal Mining Australasia B.V., an indirect subsidiary of ArcelorMittal that indirectly owned 40% of PEAMCoal, for $2.0 billion resulting in the Company's 100% ownership of PEA-PCI.

The preliminary purchase accounting allocations were recorded in the accompanying unaudited condensed consolidated financial statements as of, and for the periods subsequent to, the acquisition and control date. The Company has not yet finalized the fair value determination of the assets acquired and liabilities assumed, which is expected once third-party valuation appraisals are completed. The Company is evaluating mine lives and reviewing coal reserve studies on the acquired properties, the outcome of which will determine the final fair value allocated to coal reserve assets. The following table summarizes the preliminary estimated fair values of assets acquired and liabilities assumed that were recognized at the acquisition and control date, as well as provisional fair value adjustments made during the first nine months of 2012:

	Preliminary						Updated
	Allocations			Adjustments			Allocations
	(Dollars in millions)
Accounts receivable, net	$	106.6		$	8.8		$	115.4
Inventories	67.1			(10.5		)	56.6
Other current assets	137.5			(3.9		)	133.6
Property, plant, equipment and mine development	3,457.0			258.6			3,715.6
Investments and other assets	1,275.1			(184.3		)	1,090.8
Current maturities of long-term debt	(11.0		)	—			(11.0		)
Accounts payable and accrued expenses	(133.8		)	(26.1		)	(159.9		)
Long-term debt, less current maturities	(59.2		)	—			(59.2		)
Asset retirement obligations	(39.3		)	(15.2		)	(54.5		)
Other noncurrent liabilities	(31.4		)	(27.4		)	(58.8		)
Noncontrolling interests	(2,011.9		)	—			(2,011.9		)
Total purchase price, net of cash acquired of $261.2	$	2,756.7		$	—		$	2,756.7

The adjustments to the provisional fair values result from additional information obtained about facts in existence at the acquisition and control date. Cumulative adjustments to provisional fair values recorded in the current period are assumed to have been made as of the acquisition and control date. Prior financial statements have not been retroactively adjusted due to immateriality. Accordingly, "Depreciation, depletion and amortization" was decreased by $4.7 million and $12.2 million for the three and nine months ended September 30, 2012, respectively. "Asset retirement obligation expenses” were increased by $3.7 million for the three and nine months ended September 30, 2012. "Operating costs and expenses" were decreased by $10.1 million for the nine months ended September 30, 2012, with the entire impact recognized during the first quarter of 2012.

In connection with the PEA-PCI acquisition, the Company acquired contract-based obligations consisting of port, rail and water take-or-pay obligations and recorded a liability for unutilized capacity of $58.5 million, net of tax, which is being amortized based on that unutilized capacity over the terms of the applicable agreements which extend to 2018. As of September 30, 2012, the carrying value of the liability was $47.4 million and the associated amortization (which is classified as a reduction to “Operating costs and expenses” in the unaudited condensed consolidated statements of income) recorded during the three and nine months ended September 30, 2012 was $3.8 million and $11.1 million, respectively. Estimated future amortization of the remaining carrying value of the liability as of September 30, 2012 is expected to be $3.7 million, $18.1 million, $15.6 million and $10.0 million for the years ending December 31, 2012, 2013, 2014 and 2015, respectively. Unutilized capacity is not expected in years 2016 through 2018.

During the three and nine months ended September 30, 2012, PEA-PCI contributed revenues of $182.5 million and $479.5 million, respectively, and income before income taxes of $4.4 million and loss before income taxes of $98.7 million, respectively, which includes results from our equity affiliate investment in the Middlemount Mine. Due to the restructuring of the Company's Australian tax entities during the second quarter of 2012 described in Note 10, it is no longer practicable to calculate the net income of PEA-PCI on a standalone basis. The results of PEA-PCI for the three and nine months ended September 30, 2012 are included in the unaudited condensed consolidated statements of income and are reported in the Australian Mining segment, except for the activity associated with certain equity affiliates which is reflected in the Corporate and Other segment.

The following unaudited pro forma financial information presents the combined results of operations of the Company and PEA-PCI, on a pro forma basis, as though the companies had been combined as of January 1, 2010. The unaudited pro forma financial information does not necessarily reflect the results of operations that would have occurred had the Company and PEA-PCI constituted a single entity during those periods or that may be attained in the future.

	Three Months Ended		Nine Months Ended
	September 30, 2011		September 30, 2011
	(Dollars in millions, except per share amounts)
Revenue	$	2,194.1	$	6,154.7
Income from continuing operations, net of income taxes	256.0		727.6
Basic earnings per share	$	0.88	$	2.48
Diluted earnings per share	0.87		2.48

Pro forma income from continuing operations, net of income taxes, includes adjustments to operating costs and depreciation, depletion and amortization to reflect the additional expense for the estimated impact of fair value adjustments to coal inventory and property, plant and equipment (including mineral rights), respectively, as well as additional expense associated with the estimated impact of reflecting the equity affiliate interest at fair value.

As disclosed in Note 23 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011, a then-outstanding loan receivable balance of $384.6 million was converted to a 90% equity interest in MCG Coal Holdings Pty Ltd. (MCGH) in January 2012, resulting in consolidation of MCGH and recognition of noncontrolling interests of $53.4 million at conversion. In June 2012, the Company acquired the remaining noncontrolling interest in MCGH for total consideration of $49.8 million. This acquisition was accounted for as an equity transaction as the Company previously maintained control of MCGH. Accordingly, the Company recorded an increase to additional paid-in capital of $3.6 million in the second quarter 2012 related to this transaction, representing the difference in the price paid and the carrying value.

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Newly Adopted Accounting Standards and Accounting Standards Not Yet Implemented

9 Months Ended

Sep. 30, 2012

Accounting Changes and Error Corrections [Abstract]

Newly Adopted Accounting Standards and Accounting Standards Not Yet Implemented

Newly Adopted Accounting Standards and Accounting Standards Not Yet Implemented

In December 2011, the Financial Accounting Standards Board (FASB) issued accounting guidance requiring additional information intended to help reconcile existing differences in balance sheet offsetting requirements under U.S. GAAP and International Financial Reporting Standards (IFRS). While this standard leaves existing guidance surrounding the offsetting of financial assets and liabilities unchanged, it requires several additional disclosures, including gross and net information about instruments and transactions eligible for offset in the balance sheet and instruments and transactions subject to a master netting arrangement or similar agreement. The guidance will become effective for annual reporting periods beginning on or after January 1, 2013 and interim periods within those annual periods (January 1, 2013 for the Company). While the adoption of this guidance will impact the Company's disclosures, it will not affect the Company's results of operations, financial condition or cash flows.

In January 2010, the FASB issued accounting guidance that required new fair value disclosures, including disclosures about significant transfers into and out of Level 1 and Level 2 categories of the fair value hierarchy and a description of the reasons for the transfers. In addition, the guidance required new disclosures regarding activity in Level 3 fair value measurements, including a gross basis reconciliation. The Company began complying with the new fair value disclosure requirements beginning January 1, 2010, except for the disclosure of activity within Level 3 fair value measurements, which became effective January 1, 2011. In May 2011, the FASB issued additional fair value measurement disclosure requirements intended to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and IFRS. That update required fair value hierarchy categorization for financial instruments not measured at fair value but for which disclosure of fair value is required, disclosure of all transfers between Level 1 and Level 2 categories and additional disclosures for Level 3 measurements regarding the sensitivity of fair value to changes in unobservable inputs and any interrelationships between those inputs. The guidance became effective for interim and annual periods beginning after December 15, 2011 (January 1, 2012 for the Company). While the adoption of this guidance impacted the Company's disclosures, it did not affect the Company's results of operations, financial condition or cash flows.

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Earnings per Share (EPS)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Earnings per Share (EPS)

Earnings per Share (EPS)

Basic and diluted EPS are computed using the two-class method, which is an earnings allocation that determines EPS for each class of common stock and participating securities according to dividends declared and participation rights in undistributed earnings. The Company’s restricted stock awards are considered participating securities because holders are entitled to receive non-forfeitable dividends during the vesting term. Diluted EPS includes securities that could potentially dilute basic EPS during a reporting period, for which the Company includes the Debentures and share-based compensation awards.

A conversion of the Debentures may result in payment for any conversion value in excess of the principal amount of the Debentures in the Company’s common stock. For diluted EPS purposes, potential common stock is calculated based on whether the market price of the Company’s common stock at the end of each reporting period is in excess of the conversion price of the Debentures. For a full discussion of the conditions under which the Debentures may be converted, the conversion rate to common stock and the conversion price, see Note 11 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

For all but the performance units, the potentially dilutive impact of the Company’s share-based compensation awards is determined using the treasury stock method. Under the treasury stock method, awards are treated as if they had been exercised with any proceeds used to repurchase common stock at the average market price during the period. Any incremental difference between the assumed number of shares issued and purchased is included in the diluted share computation. For the Company’s performance units, their contingent features result in an assessment for any potentially dilutive common stock by using the end of the reporting period as if it were the end of the contingency period for all units granted. For a full discussion of the Company’s share-based compensation awards, see Note 17 to the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

The computation of diluted EPS excludes anti-dilutive shares of approximately 0.1 million for each of the periods presented. These anti-dilutive shares were due to certain share-based compensation awards calculated under the treasury stock method. Anti-dilution generally occurs where the exercise prices are higher than the average market value of the Company’s stock price during the applicable period.

The following illustrates the earnings allocation method utilized in the calculation of basic and diluted EPS:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(In millions, except per share amounts)
EPS numerator:
Income from continuing operations, net of income taxes	$	122.9		$	291.2		$	520.4		$	791.3
Less: Net (loss) income attributable to noncontrolling interests	(1.3		)	7.4			7.4			17.0
Income from continuing operations attributable to common stockholders, before allocation of earnings to participating securities	124.2			283.8			513.0			774.3
Less: Earnings from continuing operations allocated to participating    securities	0.8			1.6			3.8			4.4
Income from continuing operations attributable to common    stockholders, after allocation of earnings to participating    securities (1)	123.4			282.2			509.2			769.9
Loss from discontinued operations, net of income taxes	(81.3		)	(9.7		)	(92.7		)	(38.9		)
Less: Loss from discontinued operations allocated to participating    securities	$	(0.6	)	$	—		$	(0.8	)	$	(0.2	)
Loss from discontinued operations attributable to common     stockholders, after allocation of earnings to participating    securities (1)	$	(80.7	)	$	(9.7	)	$	(91.9	)	$	(38.7	)
Net income attributable to common stockholders, after    allocation of earnings to participating securities (1)	$	42.7		$	272.5		$	417.3		$	731.2
EPS denominator:
Weighted average shares outstanding — basic	266.2			269.2			268.5			269.0
Impact of dilutive securities	0.6			1.4			0.7			1.5
Weighted average shares outstanding — diluted	266.8			270.6			269.2			270.5
Basic EPS attributable to common stockholders:
Income from continuing operations	$	0.46		$	1.05		$	1.89		$	2.86
Loss from discontinued operations	(0.30		)	(0.04		)	(0.34		)	(0.14		)
Net income	$	0.16		$	1.01		$	1.55		$	2.72
Diluted EPS attributable to common stockholders:
Income from continuing operations	$	0.46		$	1.04		$	1.89		$	2.84
Loss from discontinued operations	(0.30		)	(0.04		)	(0.34		)	(0.13		)
Net income	$	0.16		$	1.00		$	1.55		$	2.71

⁽¹⁾  The reallocation adjustment for participating securities to arrive at the numerator used to calculate diluted EPS was less than $0.1 million for the periods presented.

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Income Taxes

9 Months Ended

Sep. 30, 2012

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The following is a reconciliation of the expected statutory federal income tax provision to the Company’s actual income tax provision:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Expected income tax provision at federal statutory rate	$	60.2		$	115.6		$	212.1		$	360.6
Excess depletion	(16.7		)	(17.0		)	(58.8		)	(53.0		)
Foreign earnings provision differential	(17.5		)	(23.8		)	(72.0		)	(74.3		)
Remeasurement of foreign income tax accounts	13.6			(38.7		)	8.7			(16.9		)
State income taxes, net of U.S. federal tax benefit	4.4			2.9			15.5			9.2
General business tax credits	(13.5		)	(4.4		)	(47.6		)	(12.7		)
Changes in valuation allowance	4.1			2.5			(30.9		)	7.0
Changes in tax reserves	8.6			6.0			21.9			10.8
Other, net	6.1			(3.9		)	36.6			8.1
Total provision	$	49.3		$	39.2		$	85.5		$	238.8

The Company reduced its prior years' net unrecognized tax benefits by $13.5 million during the nine months ended September 30, 2012. The reduction is based upon the successful completion of the 2007-2008 Internal Revenue Service (IRS) audit and the effective settlement of the 1999-2006 tax years due to favorable resolution of the 2006 IRS appeals decision, offset by the reassessment of current and prior year foreign tax positions associated with certain intercompany financing transactions due to a formal position paper received from the Australian Tax Office (ATO) challenging those positions. The Company also recognized additional interest and penalties related to unrecognized tax benefits of $2.2 million and $19.4 million for the three and nine months ended September 30, 2012, respectively.

On March 29, 2012, Australia passed legislation creating a minerals resource rent tax (the MRRT) effective from July 1, 2012. The MRRT is a profits-based tax of the Company's existing and future Australian coal projects at an effective tax rate of 22.5%. Under the MRRT, taxpayers are able to elect a market value asset starting base for existing projects which allows for the fair market value of the tenements to be deducted over the life of the mine as an allowance against MRRT. The market value allowance, and ultimately any future benefit, is subject to numerous uncertainties including review and approval by the ATO, realization only after other MRRT allowances provided under the law and estimates of long-term pricing and cost data necessary to estimate the future benefit and any MRRT liability. The Company evaluated the provisions of the new tax and assessed recoverability of deferred tax assets and the valuation of liabilities associated with the implementation of the MRRT. For the nine months ended September 30, 2012, the Company believes there is no net deferred tax asset to be recorded for the market value starting base.

During the second quarter of 2012, the Company realized a net tax benefit of $59.7 million due to an acquisition restructuring of PEA-PCI whereby certain PEA-PCI tax entities joined the Peabody legacy Australian tax group. The benefit resulted from a $14.6 million reduction in deferred tax liabilities and a $45.1 million net reduction in valuation allowance on certain deferred tax assets and net operating losses due to the tax basis reset of PEA-PCI assets required upon joining the Company's Australian consolidated tax group.

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Inventories

9 Months Ended

Sep. 30, 2012

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Materials and supplies	$	157.0	$	123.7
Raw coal	162.2		108.1
Saleable coal	235.7		212.6
Total	$	554.9	$	444.4

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Coal Trading (Details 1) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Coal Trading (Textuals) [Abstract]
Margin posted to counterparties related to credit rating	$ 0				$ 0				$ 0
Margin posted to counterparties related to credit downgrade	1,000,000				1,000,000				1,000,000
Coal Trading [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring					7,100,000
Gain on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring From Counterparty Bankruptcy	4,500,000
Fair value coal trading net assets (liabilities) measured on recurring basis
Cash Flow Hedge Derivative Instrument Assets at Fair Value	185,100,000				185,100,000				22,400,000
Coal Trading (Textuals) [Abstract]
Margin posted with counterparties and exchanges	(191,900,000)				(191,900,000)				(52,100,000)
Net Margin Posted With Counterparties For Cash Flow Hedge	(100,000,000)				(100,000,000)				(23,000,000)
Expected amount of gains to be realized over the next 12 months in accumulated other comprehensive income					137,000,000
Estimated time of transfer (in months)					12 months
Potential collateralization that may be requested by counterparties related to material adverse event	11,000,000				11,000,000				11,000,000
Margin posted to counterparties related to material adverse event	0				0				0
Variation margin posted	(191,900,000)				(191,900,000)				(52,100,000)
Initial margin posted	26,600,000				26,600,000				34,000,000
Margin in excess of the exchange-required variation and initial margin	1,700,000				1,700,000
Changes in the Company's recurring Level 3 net financial assets (liabilities)
Beginning of period	2,900,000		9,900,000		8,700,000		18,600,000
Total gains or losses (realized/unrealized):
Included in earnings	2,400,000		(1,400,000)		12,800,000		10,700,000
Settlements	(4,400,000)		(1,300,000)		(20,600,000)		(3,100,000)
Transfers out	0		1,000,000		0		(18,000,000)
End of period	900,000		8,200,000		900,000		8,200,000
Changes in unrealized gains (losses) relating to Level 3 net financial assets held both at the beginning and the end of the period
Changes in unrealized gains (losses)	200,000	[1]	(1,100,000)	[1]	(3,500,000)	[1]	8,700,000	[1]
Schedule of future realization of trading portfolio
2012	28.00%				28.00%
2013	61.00%				61.00%
2014	10.00%				10.00%
2015	1.00%				1.00%
Percentage of trading portfolio expiration, total	100.00%				100.00%
Initial Funds Outstanding With MF Global	52,100,000				52,100,000
Proceeds From Sale Of MF Global Claim	28,000,000
Funds Received from MF Global					20,000,000
Loss On Sale Of MF Global Claim	4,100,000				4,100,000
Fair Value, Measurements, Recurring [Member] | Coal Trading [Member]
Fair value coal trading net assets (liabilities) measured on recurring basis
Commodity swaps and options	33,900,000				33,900,000				19,300,000
Physical commodity purchase/sale contracts	2,400,000				2,400,000				15,000,000
Total net financial assets (liabilities)	36,300,000				36,300,000				34,300,000
Level 1[Member] | Fair Value, Measurements, Recurring [Member] | Coal Trading [Member]
Fair value coal trading net assets (liabilities) measured on recurring basis
Commodity swaps and options	2,000,000				2,000,000				21,200,000
Physical commodity purchase/sale contracts	0				0				0
Total net financial assets (liabilities)	2,000,000				2,000,000				21,200,000
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Coal Trading [Member]
Fair value coal trading net assets (liabilities) measured on recurring basis
Commodity swaps and options	31,900,000				31,900,000				(1,900,000)
Physical commodity purchase/sale contracts	1,500,000				1,500,000				6,300,000
Total net financial assets (liabilities)	33,400,000				33,400,000				4,400,000
Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Coal Trading [Member]
Fair value coal trading net assets (liabilities) measured on recurring basis
Commodity swaps and options	0				0				0
Physical commodity purchase/sale contracts	900,000				900,000				8,700,000
Total net financial assets (liabilities)	$ 900,000				$ 900,000				$ 8,700,000
Minimum [Member] | Coal Trading [Member]
Summary of Quantitative Unobservable Inputs [Abstract]
Quality Adjustment Level 3 Unobservable Input as Percentage of Overall Valuation					2.00%
Location differentials Level 3 Unobservable Input as Percentage of Overall Valuation					6.00%
Nonperformance Adjustment Level 3 Unobservable Input as Percentage of Overall Valuation					4.00%
Maximum [Member] | Coal Trading [Member]
Summary of Quantitative Unobservable Inputs [Abstract]
Quality Adjustment Level 3 Unobservable Input as Percentage of Overall Valuation					22.00%
Location differentials Level 3 Unobservable Input as Percentage of Overall Valuation					40.00%
Nonperformance Adjustment Level 3 Unobservable Input as Percentage of Overall Valuation					4.00%
Weighted Average [Member] | Coal Trading [Member]
Summary of Quantitative Unobservable Inputs [Abstract]
Quality Adjustment Level 3 Unobservable Input as Percentage of Overall Valuation					14.00%
Location differentials Level 3 Unobservable Input as Percentage of Overall Valuation					25.00%
Nonperformance Adjustment Level 3 Unobservable Input as Percentage of Overall Valuation					4.00%

[1] Within the unaudited condensed consolidated statements of income and unaudited condensed consolidated statements of comprehensive income for the periods presented, unrealized gains and losses from Level 3 items are combined with unrealized gains and losses on positions classified in Level 1 or 2, as well as other positions that have been realized during the applicable periods

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Discontinued Operations

9 Months Ended

Sep. 30, 2012

Discontinued Operations and Disposal Groups [Abstract]

Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]

Discontinued Operations

Discontinued operations include certain non-strategic Midwestern U.S. and Australian Mining segment assets held for sale which the Company has committed to divest, Midwestern U.S. Mining segment assets that have ceased production and other previously divested operations.

In September 2012, the Company announced it had permanently ceased production at its Air Quality Mine in Indiana due to uneconomic market conditions for the type of coal product previously produced at the site. The results of the mine, which were previously included within the Midwestern U.S. Mining reportable segment, have been reported as a discontinued operation for all periods presented because the operations and cash flows of the mine and related coal product have been eliminated from the ongoing operations of the Company as a result of the mine closure. Loss from discontinued operations for the three and nine months ended September 30, 2012 includes before- and after-tax charges of $116.7 million and $75.0 million, respectively, including a before- and after-tax impairment charge of $108.9 million and $68.8 million, respectively, recognized in connection with the shutdown of this mine.

Results from discontinued operations were as follows during the three and nine months ended September 30, 2012 and 2011:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(Dollars in millions)
Total revenues	$	41.5	$	55.3	$	171.5	$	122.7
Loss from discontinued operations before income taxes	$	127.6	$	12.1	$	146.6	$	53.9
Income tax benefit	46.3		2.4		53.9		15.0
Loss from discontinued operations, net of income taxes	$	81.3	$	9.7	$	92.7	$	38.9

Assets and liabilities classified as discontinued operations included in our condensed consolidated balance sheets were as follows:

	(Unaudited)
	September 30, 2012		December 31, 2011
	(Dollars in millions)
Assets:
Other current assets	$	48.4	$	24.6
Investments and other assets	135.2		232.2
Total assets classified as discontinued operations	$	183.6	$	256.8
Liabilities:
Accounts payable and accrued expenses	$	33.4	$	63.9
Other noncurrent liabilities	59.8		59.6
Total liabilities classified as discontinued operations	$	93.2	$	123.5

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Investments

9 Months Ended

Sep. 30, 2012

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

The Company’s short-term investments are defined as those investments with original maturities of greater than three months and up to one year included in "Other current assets" in the condensed consolidated balance sheets. Long-term investments are defined as those investments with original maturities greater than one year included in "Investments and other assets" in the condensed consolidated balance sheets.

The Company classifies its investments in debt securities as either held-to-maturity or available-for-sale at the time of purchase and reevaluates such designation periodically. Such investments are classified as held-to-maturity when the Company has the intent and ability to hold the securities to maturity.

Investments in debt securities not classified as held-to-maturity and investments in marketable equity securities are classified as available-for-sale. Available-for-sale securities are carried at fair value, with unrealized gains and losses, net of income taxes, reported in “Accumulated other comprehensive income (loss)” in the condensed consolidated balance sheets. Realized gains and losses, determined on a specific identification method, are included in “Interest income” in the condensed consolidated statements of income.

The Company did not have any held-to-maturity securities as of September 30, 2012 or December 31, 2011.

Investments in available-for-sale securities at September 30, 2012 were as follows:

Available-for-sale securities	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(Dollars in millions)
Current:
Federal government securities	$	0.8	$	—	$	—		$	0.8
U.S. corporate bonds	3.4		—		—			3.4
Noncurrent:
Marketable equity securities	66.5		—		(40.0		)	26.5
Federal government securities	23.2		0.3		—			23.5
U.S. corporate bonds	12.9		0.2		—			13.1
Total	$	106.8	$	0.5	$	(40.0	)	$	67.3

Investments in available-for-sale securities at December 31, 2011 were as follows:

Available-for-sale securities	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
			(Dollars in millions)
Current:
Federal government securities	$	3.3	$	—	$	—		$	3.3
U.S. corporate bonds	3.9		—		—			3.9
Noncurrent:
Marketable equity securities	66.5		—		(9.5		)	57.0
Federal government securities	11.3		0.2		—			11.5
U.S. corporate bonds	7.7		0.1		—			7.8
Total	$	92.7	$	0.3	$	(9.5	)	$	83.5

Contractual maturities for available-for-sale investments in debt securities at September 30, 2012 were as shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

Contractual maturities for available-for-sale securities	Cost		Fair Value
	(Dollars in millions)
Due in one year or less	$	4.2	$	4.2
Due in one to five years	36.1		36.6
Total	$	40.3	$	40.8

The Company’s investments in marketable equity securities consist of an investment in Winsway Coking Coal Holdings Limited (Winsway).

Proceeds from sales and maturities of securities amounted to zero and $9.8 million for the three and nine months ended September 30, 2012, respectively. The Company realized net gains of less than $0.1 million during the nine months ended September 30, 2012 associated with those sales and maturities.

In addition to the securities described above, the Company previously held an investment in debt securities related to the Company's pro-rata share of funding in the Newcastle Coal Infrastructure Group (NCIG), which was included in "Investments and other assets" in the condensed consolidated balance sheets. These debt securities were recorded at cost, which approximated fair value, and denominated in U.S. dollars. The Company sold $11.4 million and $29.2 million of debt securities related to NCIG during the three and nine months ended September 30, 2012, respectively. The Company recognized no loss on the sale during the three months ended September 30, 2012 and a loss of $0.2 million on the sale for the nine months ended September 30, 2012. There were no NCIG securities held at September 30, 2012.

At each reporting date, the Company performs separate evaluations of debt and equity securities to determine if any unrealized losses are other-than-temporary. After evaluating the length of time the market value has been less than cost and the financial condition and near-term prospects of Winsway, the Company deemed the impairment associated with its Winsway equity securities to be temporary as of September 30, 2012. The Company has the ability to hold the securities until recovery and has no current intention to divest the securities. Accordingly, the Company did not recognize other-than-temporary losses on its investments during the three or nine months ended September 30, 2012.

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Derivatives and Fair Value Measurements

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Derivatives and Fair Value Measurements

Derivatives and Fair Value Measurements

Risk Management — Non-Coal Trading Activities

The Company is exposed to various types of risk in the normal course of business, including price risk on commodities utilized in the Company's mining operations, interest rate risk on long-term debt and foreign currency exchange rate risk for non-U.S. dollar expenditures. In most cases, commodity price risk (excluding coal trading activities) related to the sale of coal is mitigated through the use of long-term, fixed-price contracts, with a small percentage mitigated through the use of financial instruments. In order to manage our exposure related to price risk on certain commodities used in production, as well as for interest rate and foreign currency exchange rate risk, the Company utilizes derivative financial instruments. These risks are actively monitored in an effort to ensure compliance with the risk management policies of the Company.

Foreign Currency Hedges. The Company is exposed to foreign currency exchange rate risk, primarily on Australian dollar expenditures made in its Australian Mining segment. This risk is managed through the use of forward contracts and options that the Company designates as cash flow hedges, with the objective of reducing the variability of cash flows associated with forecasted foreign currency expenditures.

Diesel Fuel and Explosives Hedges. The Company is exposed to commodity price risk associated with diesel fuel and explosives utilized in production in the U.S. and Australia. This risk is managed through the use of cost pass-through contracts and derivatives, primarily swaps. The Company generally designates the swap contracts as cash flow hedges, with the objective of reducing the variability of cash flows associated with forecasted diesel fuel and explosives purchases.

Interest Rate Swaps. The Company is exposed to interest rate risk on its fixed rate and variable rate long-term debt. From time to time, the Company manages the interest rate risk associated with the fair value of its fixed rate borrowings using fixed-to-floating interest rate swaps to effectively convert a portion of the underlying cash flows on the debt into variable rate cash flows. The Company designates these swaps as fair value hedges, with the objective of hedging against adverse changes in the fair value of the fixed rate debt that results from market interest rate changes. In addition, from time to time, interest rate risk associated with the Company’s variable rate borrowings is managed using floating-to-fixed interest rate swaps. The Company designates these swaps as cash flow hedges, with the objective of reducing the variability of cash flows associated with market interest rate changes. As of September 30, 2012, the Company had no interest rate swaps in place.

Notional Amounts and Fair Value. The following summarizes the Company’s foreign currency and commodity positions at September 30, 2012:

	Notional Amount by Year of Maturity
	Total		2012		2013		2014		2015
Foreign Currency
A$:US$ hedge contracts (A$ millions)	$	4,832.3	$	566.1	$	2,173.6	$	1,513.5	$	579.1
Commodity Contracts
Diesel fuel hedge contracts (million gallons)	215.4		27.0		102.1		63.6		22.7
U.S. explosives hedge contracts (million MMBtu)	4.6		0.8		2.6		1.2		—

	Account Classification by
	Cash Flow Hedge		Fair Value Hedge		Economic Hedge		Fair Value Asset (Liability)
							(Dollars in millions)
Foreign Currency
A$:US$ hedge contracts (A$ millions)	$	4,832.3	$	—	$	—	$	511.7
Commodity Contracts
Diesel fuel hedge contracts (million gallons)	215.4		—		—		30.9
U.S. explosives hedge contracts (million MMBtu)	4.6		—		—		(5.9		)

Hedge Ineffectiveness. The Company assesses, both at inception and at least quarterly thereafter, whether the derivatives used in hedging activities are highly effective at offsetting the changes in the anticipated cash flows of the hedged item. The effective portion of the change in the fair value is recorded in “Accumulated other comprehensive income (loss)” until the hedged transaction impacts reported earnings, at which time any gain or loss is reclassified to earnings. To the extent that periodic changes in the fair value of derivatives deemed highly effective exceeds such changes in the hedged item, the ineffective portion of the periodic non-cash changes are recorded in earnings in the period of the change. If the hedge ceases to qualify for hedge accounting, the Company prospectively recognizes changes in the fair value of the instrument in earnings in the period of the change.

A measure of ineffectiveness is inherent in hedging future diesel fuel purchases with derivative positions based on refined petroleum products as a result of location and product differences.

The Company’s derivative positions for the hedging of future explosives purchases are based on natural gas, which is the primary price component of explosives. However, a small measure of ineffectiveness exists as the contractual purchase price includes manufacturing fees that are subject to periodic adjustments. In addition, other fees, such as transportation surcharges, can result in ineffectiveness, but have historically changed infrequently and comprise a small portion of the total explosives cost.

The Company’s derivative positions for the hedging of forecasted foreign currency expenditures contain a small measure of ineffectiveness due to timing differences between the hedge settlement and the purchase transaction, which could differ by less than a day and up to a maximum of 30 days.

The tables below show the classification and amounts of pre-tax gains and losses related to the Company’s non-coal trading hedges during the three and nine months ended September 30, 2012 and 2011:        

		Three Months Ended September 30, 2012
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Gain reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	49.6		$	11.2	$	2.2
Foreign currency forward and option contracts	Operating costs and expenses	—		169.2			82.0		—
Total		$	—	$	218.8		$	93.2	$	2.2
		Three Months Ended September 30, 2011
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Loss recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Loss reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	(51.2	)	$	8.5	$	(1.2	)
Foreign currency forward and option contracts:
— Operating costs	Operating costs and expenses	—		(269.1		)	92.2		—
— Capital expenditures	Depreciation, depletion and amortization	—		(0.5		)	—		—
Total		$	—	$	(320.8	)	$	100.7	$	(1.2	)

		Nine Months Ended September 30, 2012
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Loss reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	28.7		$	39.0	$	(2.3	)
Foreign currency forward and option contracts	Operating costs and expenses	—		297.5			276.6		—
Total		$	—	$	326.2		$	315.6	$	(2.3	)
		Nine Months Ended September 30, 2011
Financial Instrument	Income Statement Classification Gains (Losses) - Realized	Gain recognized in income on non-designated derivatives		Gain (loss) recognized in other comprehensive income on derivatives (effective portion)			Gain reclassified from other comprehensive income into income (effective portion)		Gain reclassified from other comprehensive income into income (ineffective portion)
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses	$	—	$	20.9		$	28.4	$	0.4
Foreign currency forward and option contracts:
— Operating costs	Operating costs and expenses	—		33.8			261.1		—
— Capital expenditures	Depreciation, depletion and amortization	—		(0.7		)	—		—
Total		$	—	$	54.0		$	289.5	$	0.4

Based on the net fair value of the Company’s non-coal trading positions held in “Accumulated other comprehensive income (loss)” at September 30, 2012, unrealized gains to be reclassified from comprehensive income to earnings over the next 12 months associated with the Company’s foreign currency and diesel fuel hedge programs are expected to be approximately $287 million and $30 million, respectively, while the unrealized losses to be realized under the explosives hedge program are expected to be approximately $4 million. As these unrealized gains are associated with derivative instruments that represent hedges of forecasted transactions, the amounts reclassified to earnings will partially offset the realized transactions, while the unrealized losses will add incremental expense to the unaudited condensed consolidated statements of income.

The classification and amount of derivatives presented on a gross basis as of September 30, 2012 and December 31, 2011 were as follows:

	Fair Value as of September 30, 2012
Financial Instrument	Current Assets		Noncurrent Assets		Current Liabilities		Noncurrent Liabilities
	(Dollars in millions)
Commodity swap contracts	$	32.8	$	5.2	$	6.1	$	6.9
Foreign currency forward and option contracts	286.7		225.0		—		—
Total	$	319.5	$	230.2	$	6.1	$	6.9

	Fair Value as of December 31, 2011
Financial Instrument	Current Assets		Noncurrent Assets		Current Liabilities		Noncurrent Liabilities
	(Dollars in millions)
Commodity swap contracts	$	43.4	$	11.7	$	7.1	$	15.0
Foreign currency forward and option contracts	270.4		229.0		4.3		4.5
Total	$	313.8	$	240.7	$	11.4	$	19.5

After netting by counterparty where permitted, the fair values of the respective derivatives are reflected in “Other current assets,” “Investments and other assets,” “Accounts payable and accrued expenses” and “Other noncurrent liabilities” in the condensed consolidated balance sheets.

See Note 8 for information related to the Company’s coal trading activities.

Fair Value Measurements

The Company uses a three-level fair value hierarchy that categorizes assets and liabilities measured at fair value based on the observability of the inputs utilized in the valuation. These levels include: Level 1 - inputs are quoted prices in active markets for the identical assets or liabilities; Level 2 - inputs are other than quoted prices included in Level 1 that are directly or indirectly observable through market-corroborated inputs; and Level 3 - inputs are unobservable, or observable but cannot be market-corroborated, requiring the Company to make assumptions about pricing by market participants.

Financial Instruments Measured on a Recurring Basis. The following tables set forth the hierarchy of the Company’s net financial asset positions for which fair value is measured on a recurring basis:

	September 30, 2012
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investments in debt and equity securities	$	67.3	$	—	$	—	$	67.3
Commodity swap contracts	—		25.0		—		25.0
Foreign currency forward and option contracts	—		511.7		—		511.7
Total net financial assets	$	67.3	$	536.7	$	—	$	604.0

	December 31, 2011
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Investments in debt and equity securities	$	83.5	$	—	$	—	$	83.5
Commodity swap contracts	—		33.0		—		33.0
Foreign currency forward and option contracts	—		490.6		—		490.6
Total net financial assets	$	83.5	$	523.6	$	—	$	607.1

For Level 1 and 2 financial assets and liabilities, the Company utilizes both direct and indirect observable price quotes, including interest rate yield curves, exchange indices, broker quotes, published indices and other market quotes. Below is a summary of the Company’s valuation techniques for Level 1 and 2 financial assets and liabilities:

• Investments in debt and equity securities: valued based on quoted prices in active markets (Level 1).

• Commodity swap contracts — diesel fuel and explosives: valued based on a valuation that is corroborated by the use of market-based pricing (Level 2).

• Foreign currency forward and option contracts: valued utilizing inputs obtained in quoted public markets (Level 2).

The Company did not have any transfers between levels during the three or nine months ended September 30, 2012 or 2011 for its non-coal trading positions. The Company’s policy is to value transfers between levels using the beginning of period valuation.

Other Financial Instruments. The following methods and assumptions were used by the Company in estimating fair values for other financial instruments as of September 30, 2012 and December 31, 2011:

• Cash and cash equivalents, accounts receivable, including those within the Company’s accounts receivable securitization program, and accounts payable and accrued expenses have carrying values which approximate fair value due to the short maturity or the liquid nature of these instruments.

• The Company’s investment in debt securities related to its pro-rata share of funding in NCIG were included in “Investments and other assets” in the condensed consolidated balance sheets as of December 31, 2011, at which time the debt securities were recorded at cost, which approximated fair value. The Company disposed of its remaining investment in debt securities related to NCIG during the nine months ended September 30, 2012.

• Long-term debt fair value estimates are based on observed prices for securities with an active trading market when available (Level 2), and otherwise on estimated borrowing rates to discount the cash flows to their present value (Level 3). The carrying amounts of the 7.875% Senior Notes due December 2026 and the Convertible Junior Subordinated Debentures due 2066 (the Debentures) are net of the respective unamortized note discounts.

The carrying amounts and estimated fair values of the Company’s debt are summarized as follows:

	September 30, 2012				December 31, 2011
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
	(Dollars in millions)
Long-term debt	$	6,363.1	$	6,393.0	$	6,657.5	$	6,922.7

Nonperformance and Credit Risk

The fair value of the Company’s non-coal trading derivative assets and liabilities reflects adjustments for nonperformance and credit risk. The Company manages its counterparty risk through established credit standards, diversification of counterparties, utilization of investment grade commercial banks and continuous monitoring of counterparty creditworthiness. To reduce its credit exposure for these hedging activities, the Company seeks to enter into netting agreements with counterparties that permit the Company to offset asset and liability positions with such counterparties in the event of defaul

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Reconciliation of the expected statutory federal income tax provision to the Company's actual income tax provision
Expected income tax provision at federal statutory rate	$ 60.2	$ 115.6	$ 212.1	$ 360.6
Excess depletion	(16.7)	(17.0)	(58.8)	(53.0)
Foreign earnings provision differential	(17.5)	(23.8)	(72.0)	(74.3)
Remeasurement of foreign income tax accounts	13.6	(38.7)	8.7	(16.9)
State income taxes, net of U.S. federal tax benefit	4.4	2.9	15.5	9.2
General business tax credits	(13.5)	(4.4)	(47.6)	(12.7)
Changes in valuation allowance	4.1	2.5	(30.9)	7.0
Changes in tax reserves	8.6	6.0	21.9	10.8
Other, net	6.1	(3.9)	36.6	8.1
Total provision	$ 49.3	$ 39.2	$ 85.5	$ 238.8

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Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Sep. 30, 2012
Extinguishment of Debt [Line Items]
(Gains) Losses on Extinguishment of Debt	$ 2.8
Write off of deferred financing costs	3.4
Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost	0.6
6.00% Senior Notes due November 2018 [Member]
Extinguishment of Debt [Line Items]
Repurchase of Long-term Debt	81.2
Debt Instrument, Interest Rate, Stated Percentage		6.00%
6.25% Senior Notes due November 2021 [Member]
Extinguishment of Debt [Line Items]
Repurchase of Long-term Debt	$ 160.4
Debt Instrument, Interest Rate, Stated Percentage		6.25%

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Financing Receivables (Details) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 AUD	Dec. 31, 2011 USD ($)	Oct. 23, 2011 Coppabella, Moorvale, and Codrilla Mines [Member]	Sep. 30, 2012 Codrilla Mine Project [Member] USD ($)	Dec. 31, 2011 Codrilla Mine Project [Member] USD ($)	Sep. 30, 2012 Middlemount Mine [Member] USD ($)	Dec. 31, 2011 Middlemount Mine [Member] USD ($)	Sep. 30, 2012 Financing Receivable [Member] USD ($)	Dec. 31, 2011 Financing Receivable [Member] USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable	$ 385.1		$ 376.1
Accounts Receivable, Net						34.2			9.8	51.3
Other current assets	697.6		768.0					65.0	0	65.0
Investments and other assets					36.2	35.6	339.1	224.2	375.3	259.8
Percentage of Ownership Before Transaction			85.00%
Percentage of Undivided Interests Acquired				73.30%
Consideration Received By Company Upon Completion of Sell Down		15.0
Percentage of Agreed Sale Price as Consideration	20.00%	20.00%
Business Acquistion Percentage Of Agreed Sales Price First Installment Payment	40.00%	40.00%
Percentage of Agreed Sale Price as Final Installment Payment	40.00%	40.00%
Debt Instrument, Basis Spread on Variable Rate							3.50%

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Coal Trading (Tables) (Coal Trading [Member])

9 Months Ended

Sep. 30, 2012

Coal Trading [Member]

Coal Trading [Line Items]

Trading revenue by type of instrument

rading revenues recognized during the three and nine months ended September 30, 2012 and 2011 were as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
Trading Revenues by Type of Instrument	2012			2011			2012		2011
	(Dollars in millions)
Commodity swaps and options	$	60.3		$	(0.6	)	$	110.9	$	(26.6	)
Physical commodity purchase/sale contracts	(20.0		)	29.6			21.9		60.9
Total trading revenues	$	40.3		$	29.0		$	132.8	$	34.3

Fair value of assets and liabilities from coal trading activities

The fair value of assets and liabilities from coal trading activities is set forth below:

	September 30, 2012						December 31, 2011
	Gross Basis			Net Basis			Gross Basis			Net Basis
	(Dollars in millions)
Assets from coal trading activities	$	444.8		$	56.2		$	170.4		$	44.6
Liabilities from coal trading activities	(216.6		)	(19.9		)	(84.0		)	(10.3		)
Subtotal	228.2			36.3			86.4			34.3
Net margin held (1)	(191.9		)	—			(52.1		)	—
Net value of coal trading positions	$	36.3		$	36.3		$	34.3		$	34.3

⁽¹⁾  Represents margin held from exchanges of $191.9 million and $52.1 million at September 30, 2012 and December 31, 2011, respectively. Approximately $100 million and $23 million of the margin held at September 30, 2012 and December 31, 2011, respectively, related to cash flow hedges.

Fair value coal trading net assets (liabilities) measured on recurring basis

The following tables set forth the hierarchy of the Company’s net financial asset (liability) coal trading positions for which fair value is measured on a recurring basis:

	September 30, 2012
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Commodity swaps and options	$	2.0	$	31.9	$	—	$	33.9
Physical commodity purchase/sale contracts	—		1.5		0.9		2.4
Total net financial assets	$	2.0	$	33.4	$	0.9	$	36.3

	December 31, 2011
	Level 1		Level 2			Level 3		Total
	(Dollars in millions)
Commodity swaps and options	$	21.2	$	(1.9	)	$	—	$	19.3
Physical commodity purchase/sale contracts	—		6.3			8.7		15.0
Total net financial assets	$	21.2	$	4.4		$	8.7	$	34.3

Schedule of Quantitative Unobservable Inputs, Physical Commodity Purchase/Sale Contracts

The following table summarizes the quantitative unobservable inputs utilized by the Company's internally-developed valuation models for physical commodity purchase/sale contracts classified as Level 3 as of September 30, 2012:

	Range				Weighted
	Low		High		Average
Quality adjustments	2	%	22	%	14	%
Location differentials	6	%	40	%	25	%
Non-performance adjustments	4	%	4	%	4	%

Change in the Company's recurring Level 3 net financial assets

The following table summarizes the changes in the Company’s recurring Level 3 net financial assets:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Beginning of period	$	2.9		$	9.9		$	8.7		$	18.6
Total net gains (losses) realized/unrealized:
Included in earnings	2.4			(1.4		)	12.8			10.7
Settlements	(4.4		)	(1.3		)	(20.6		)	(3.1		)
Transfers out	—			1.0			—			(18.0		)
End of period	$	0.9		$	8.2		$	0.9		$	8.2

Changes in unrealized gains (losses) relating to Level 3 net financial assets

The following table summarizes the changes in net unrealized gains relating to Level 3 net financial assets held both as of the beginning and the end of the period:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2012		2011			2012			2011
	(Dollars in millions)
Changes in net unrealized gains (1)	$	0.2	$	(1.1	)	$	(3.5	)	$	8.7

⁽¹⁾  Within the unaudited condensed consolidated statements of income and unaudited condensed consolidated statements of comprehensive income for the periods presented, unrealized gains and losses from Level 3 items are combined with unrealized gains and losses on positions classified in Level 1 or 2, as well as other positions that have been realized during the applicable periods.

Schedule of future realization of the Company's trading portfolio

As of September 30, 2012, the timing of the estimated future realization of the value of the Company’s trading portfolio was as follows:

Year of	Percentage of
Expiration	Portfolio Total
2012	28	%
2013	61	%
2014	10	%
2015	1	%
	100	%

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Investments (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Investments, Debt and Equity Securities [Abstract]
Short-term investments maturity period		Greater than three months and up to one year
Long-term investments maturity period		Greater than one year
Other than temporary losses on investments	$ 0	$ 0
Held-to-maturity Securities	0	0		0
Investments (Textuals) [Abstract]
Proceeds from Sale of Available-for-sale Securities	0	9.8
Realized gains from sale of available-for-sale securities	0.1	0.1
Proceeds from sales and maturities of debt and equity securities		39.0	53.3
Newcastle Coal Infrastructure Group [Domain]
Investments (Textuals) [Abstract]
Fair Value of securities	0	0
Proceeds from sales and maturities of debt and equity securities	11.4	29.2
Realized losses from sale of available-for-sale securities	$ 0	$ 0.2

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Pension and Postretirement Benefit Costs

9 Months Ended

Sep. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Pension and Postretirement Benefit Costs

Pension and Postretirement Benefit Costs

Net periodic pension costs included the following components:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Service cost for benefits earned	$	0.5		$	0.4		$	1.5		$	1.3
Interest cost on projected benefit obligation	11.7			12.4			35.1			37.3
Expected return on plan assets	(15.9		)	(16.1		)	(47.8		)	(48.3		)
Amortization of prior service cost	0.3			0.3			0.8			0.8
Amortization of actuarial loss	12.1			7.5			36.4			22.5
Net periodic pension costs	$	8.7		$	4.5		$	26.0		$	13.6

Annual contributions to the qualified plans are made in accordance with minimum funding standards and the Company's agreement with the Pension Benefit Guaranty Corporation (PBGC). Funding decisions also consider certain funded status thresholds defined by the Pension Protection Act of 2006 (generally 80%). As of January 1, 2012, the Company's qualified plans were above the Pension Protection Act thresholds and will therefore avoid benefit restrictions and at-risk penalties for 2012. On July 6, 2012, the Moving Ahead for Progress in the 21st Century Act (MAP-21), a highway reauthorization and student loan bill that includes both pension funding stabilization provisions and PBGC premium increases, was signed into law. The pension funding stabilization provisions temporarily increased the interest rates used to determine pension liabilities for purposes of minimum funding requirements. MAP-21 is not expected to change the Company's total required cash contributions over the long term, but is expected to reduce the Company's required cash contributions through 2015 relative to prior law if current interest rate levels persist. Based upon revised minimum funding requirements in accordance with MAP-21, the Company has no further funding requirements to its qualified plans for the remainder of 2012. Prior to the enactment of MAP-21, the Company intended to contribute $5.0 million in 2012 to meet minimum contribution requirements for its qualified plans. The Company expects to make contributions to its non-qualified plans during 2012 totaling less than $2.0 million.

Net periodic postretirement benefit costs included the following components:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(Dollars in millions)
Service cost for benefits earned	$	3.6	$	3.5	$	10.9	$	9.8
Interest cost on accumulated postretirement benefit obligation	13.7		14.5		41.2		43.4
Amortization of prior service cost	0.7		0.8		1.7		1.6
Amortization of actuarial loss	8.1		6.7		24.5		20.2
Net periodic postretirement benefit costs	$	26.1	$	25.5	$	78.3	$	75.0

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Segment Information

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company reports its results of operations primarily through the following reportable segments: “Western U.S. Mining,” “Midwestern U.S. Mining,” “Australian Mining,” “Trading and Brokerage” and “Corporate and Other.” The Company’s chief operating decision maker uses Adjusted EBITDA as the primary measure of segment profit and loss. The Company defines Adjusted EBITDA as income from continuing operations before deducting net interest expense, income taxes, asset retirement obligation expenses, depreciation, depletion and amortization and amortization of basis difference associated with equity method investments.

Reportable segment results were as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Revenues:
Australian Mining	$	866.0		$	718.7		$	2,605.0		$	2,155.3
Western U.S. Mining	783.5			758.5			2,213.5			2,124.5
Midwestern U.S. Mining	355.7			368.5			1,050.1			1,025.3
Trading and Brokerage	45.6			131.5			173.7			329.5
Corporate and Other	8.0			3.4			18.3			31.5
Total	$	2,058.8		$	1,980.6		$	6,060.6		$	5,666.1
Adjusted EBITDA:
Australian Mining	$	221.4		$	246.1		$	757.4		$	852.2
Western U.S. Mining	243.9			218.7			616.3			532.2
Midwestern U.S. Mining	103.5			105.4			317.4			292.8
Trading and Brokerage	35.7			57.4			109.2			134.6
Corporate and Other	(144.6		)	(119.1		)	(378.8		)	(273.4		)
Total	$	459.9		$	508.5		$	1,421.5		$	1,538.4

A reconciliation of Adjusted EBITDA to consolidated income from continuing operations, net of income taxes follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Total Adjusted EBITDA	$	459.9		$	508.5		$	1,421.5		$	1,538.4
Depreciation, depletion and amortization	172.5			108.4			470.7			317.6
Amortization of basis difference related to equity affiliates	(0.2		)	—			3.0			—
Asset retirement obligation expenses	21.1			14.6			53.3			43.3
Interest expense	99.4			59.2			308.3			159.1
Interest income	(5.1		)	(4.1		)	(19.7		)	(11.7		)
Income tax provision	49.3			39.2			85.5			238.8
Income from continuing operations, net of income taxes	$	122.9		$	291.2		$	520.4		$	791.3

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Investments (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Investments in available-for-sale securities
Available-for-sale securities, Cost	$ 106.8	$ 92.7
Available-for-sale Securities, Gross Unrealized Gains	0.5	0.3
Available-for-sale Securities, Gross Unrealized Losses	(40.0)	(9.5)
Current [Member] | Federal government securities [Member]
Investments in available-for-sale securities
Available-for-sale securities, Cost	0.8	3.3
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale securities, Fair Value	0.8	3.3
Current [Member] | U.S. corporate bonds [Member]
Investments in available-for-sale securities
Available-for-sale securities, Cost	3.4	3.9
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale securities, Fair Value	3.4	3.9
Noncurrent [Member] | Federal government securities [Member]
Investments in available-for-sale securities
Available-for-sale securities, Cost	23.2	11.3
Available-for-sale Securities, Gross Unrealized Gains	0.3	0.2
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale securities, Fair Value	23.5	11.5
Noncurrent [Member] | U.S. corporate bonds [Member]
Investments in available-for-sale securities
Available-for-sale securities, Cost	12.9	7.7
Available-for-sale Securities, Gross Unrealized Gains	0.2	0.1
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale securities, Fair Value	13.1	7.8
Noncurrent [Member] | Marketable equity securities [Member]
Investments in available-for-sale securities
Available-for-sale securities, Cost	66.5	66.5
Available-for-sale Securities, Gross Unrealized Gains	0	0
Available-for-sale Securities, Gross Unrealized Losses	(40.0)	(9.5)
Available-for-sale securities, Fair Value	26.5	57.0
Fair Value, Measurements, Recurring [Member]
Investments in available-for-sale securities
Available-for-sale securities, Fair Value	$ 67.3	$ 83.5

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Financial Instruments and Guarantees with Off-Balance-Sheet Risk (Tables)

9 Months Ended

Sep. 30, 2012

Financial Instruments And Guarantees With Off Balance Sheet Risk Disclosure [Abstract]

Letters of credit, bank guarantees, surety bonds and corporate guarantees

As of September 30, 2012, the Company had the following financial instruments with off-balance sheet risk:

	Reclamation Obligations		Lease Obligations		Workers’ Compensation Obligations		Other(1)		Total
	(Dollars in millions)
Self bonding	$	1,221.9	$	—	$	—	$	—	$	1,221.9
Surety bonds	372.1		105.3		11.8		9.8		499.0
Bank guarantees	225.9		—		—		204.7		430.6
Letters of credit	—		—		62.4		81.2		143.6
	$	1,819.9	$	105.3	$	74.2	$	295.7	$	2,295.1

⁽¹⁾  Other includes the $79.7 million in letters of credit described below and an additional $216.0 million in bank guarantees, surety bonds and letters of credit related to collateral for surety companies, road maintenance, performance guarantees and other operations.

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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash Flows From Operating Activities
Net income	$ 427.7	$ 752.4
Loss from discontinued operations, net of income taxes	92.7	38.9
Income from continuing operations, net of income taxes	520.4	791.3
Adjustments to reconcile income from continuing operations, net of income taxes to net cash provided by operating activities:
Depreciation, depletion and amortization	470.7	317.6
Deferred income taxes	(162.6)	48.2
Share-based compensation	34.9	32.4
Net gain on disposal or exchange of assets	(7.6)	(31.4)
Loss from equity affiliates	50.5	9.0
Changes in current assets and liabilities:
Accounts receivable	259.0	(11.8)
Change in receivable from accounts receivable securitization program	(50.0)	0
Inventories	(117.4)	(12.3)
Net assets from coal trading activities	145.6	71.7
Other current assets	42.7	(42.3)
Accounts payable and accrued expenses	84.6	(15.6)
Asset retirement obligations	55.6	27.2
Accrued postretirement benefit costs	27.7	26.6
Pension costs	26.0	25.5
Contributions to pension plans	(1.3)	(1.3)
Other, net	(5.1)	(18.1)
Net cash provided by continuing operations	1,373.7	1,216.7
Net cash used in discontinued operations	(82.2)	(26.2)
Net cash provided by operating activities	1,291.5	1,190.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	(732.1)	(553.4)
Federal coal lease expenditures	(247.9)	(42.4)
Investment in Prairie State Energy Campus	(9.4)	(29.8)
Proceeds from disposal of assets	93.5	12.1
Investments in equity affiliates and joint ventures	0	(39.8)
Proceeds from sales and maturities of debt and equity securities	39.0	53.3
Purchases of debt and equity securities	(23.8)	(44.1)
Purchases of short-term investments	0	(100.0)
Proceeds from sale of short-term investments	0	100.0
Investment in shares of Macarthur Coal Limited	0	(45.5)
Contributions to joint ventures	(531.2)	0
Distributions from joint ventures	527.7	0
Repayment of loans from related parties	720.2	0
Advances to related parties	(743.4)	0
Other, net	(3.2)	(4.4)
Net cash used in continuing operations	(910.6)	(694.0)
Net cash used in discontinued operations	(11.2)	(62.8)
Net cash used in investing activities	(921.8)	(756.8)
Cash Flows From Financing Activities
Payments of long-term debt	(305.7)	(248.4)
Common stock repurchase	(99.9)	0
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	(49.8)	0
Dividends paid	(69.1)	(69.1)
Repurchase of employee common stock relinquished for tax withholding	(8.3)	(16.1)
Excess tax benefits related to share-based compensation	3.6	6.1
Other, net	8.4	0.2
Net cash used in financing activities	(520.8)	(327.3)
Net change in cash and cash equivalents	(151.1)	106.4
Cash and cash equivalents at beginning of period	799.1	1,295.2
Cash and cash equivalents at end of period	648.0	1,401.6
Retained Earnings [Member]
Cash Flows From Operating Activities
Net income	420.3
Cash Flows From Financing Activities
Dividends paid	(69.1)
Treasury Stock [Member]
Cash Flows From Financing Activities
Common stock repurchase	$ (99.9)

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Basis of Presentation

9 Months Ended

Sep. 30, 2012

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The condensed consolidated financial statements include the accounts of Peabody Energy Corporation (the Company) and its affiliates. All intercompany transactions, profits and balances have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's 2011 Annual Report on Form 10-K. In the opinion of management, these financial statements reflect all normal, recurring adjustments necessary for a fair presentation. Balance sheet information presented herein as of December 31, 2011 has been derived from the Company’s audited consolidated balance sheet at that date. The results of operations for the three and nine months ended September 30, 2012 are not necessarily indicative of the results that may be expected for future quarters or for the year ending December 31, 2012.

The Company classifies items within discontinued operations in the unaudited condensed consolidated financial statements when the operations and cash flows of a particular component of the Company have been (or will be) eliminated from the ongoing operations of the Company as a result of a disposal (by sale or otherwise) and the Company will no longer have any significant continuing involvement in the operation of that component.

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Acquistion of Macarthur Coal Limited Phantom (Details) (Macarthur [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Macarthur [Member]
Business Acquisition [Line Items]
Business combination, provisional information, initial accounting incomplete, adjustment, asset retirement obligation	$ 3.7	$ 3.7

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Pension and Postretirement Benefit Costs Details Textuals (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Maximum contribution in 2012 to non-qualified plan	$ 2.0
funding threshhold		80.00%
Minimum contributions in 2012 on qualified plan	$ 5.0

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Supplemental Guarantor/Non-Guarantor Financial Information

9 Months Ended

Sep. 30, 2012

Supplemental Guarantor Non Guarantor Financial Information [Abstract]

Supplemental Guarantor/Non-Guarantor Financial Information

Supplemental Guarantor/Non-Guarantor Financial Information

In accordance with the indentures governing the 5.875% Senior Notes due April 2016 (redeemed in the second quarter of 2011), the 7.375% Senior Notes due November 2016, the 6.00% Senior Notes due September 2018, the 6.50% Senior Notes due September 2020, the 6.25% Senior Notes due September 2021 and the 7.875% Senior Notes due November 2026 (collectively the Senior Notes), certain wholly owned U.S. subsidiaries of the Company have fully and unconditionally guaranteed the Senior Notes, on a joint and several basis. Separate financial statements and other disclosures concerning the Guarantor Subsidiaries are not presented because management believes that such information is not material to the holders of the Senior Notes. The following historical financial statement information is provided for the Guarantor/Non-Guarantor Subsidiaries.

Unaudited Supplemental Condensed Consolidating Statements of Income

	Three Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	1,336.9		$	778.3		$	(56.4	)	$	2,058.8
Costs and expenses
Operating costs and expenses	(95.6		)	882.8			778.2			(56.4		)	1,509.0
Depreciation, depletion and amortization	—			84.8			87.7			—			172.5
Asset retirement obligation expenses	—			11.8			9.3			—			21.1
Selling and administrative expenses	8.3			54.5			5.9			—			68.7
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(1.4		)	1.2			—			(0.2		)
(Income) loss from equity affiliates	(117.0		)	1.9			19.3			117.0			21.2
Interest expense	101.8			5.8			124.4			(132.6		)	99.4
Interest income	(72.9		)	(46.8		)	(18.0		)	132.6			(5.1		)
Unrealized (gain) loss on derivatives	—			(112.3		)	112.3			—			—
Income (loss) from continuing operations before income taxes	175.4			455.8			(342.0		)	(117.0		)	172.2
Income tax provision (benefit)	131.8			101.7			(184.2		)	—			49.3
Income (loss) from continuing operations, net of income taxes	43.6			354.1			(157.8		)	(117.0		)	122.9
Loss from discontinued operations, net of income taxes	(0.7		)	(75.9		)	(4.7		)	—			(81.3		)
Net income (loss)	42.9			278.2			(162.5		)	(117.0		)	41.6
Less: Net loss attributable to noncontrolling interests	—			—			(1.3		)	—			(1.3		)
Net income (loss) attributable to common stockholders	$	42.9		$	278.2		$	(161.2	)	$	(117.0	)	$	42.9
Comprehensive income (loss) attributable to common stockholders	$	119.3		$	291.7		$	(175.8	)	$	(115.9	)	$	119.3

Unaudited Supplemental Condensed Consolidating Statements of Income

	Three Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	1,213.3		$	811.3		$	(44.0	)	$	1,980.6
Costs and expenses
Operating costs and expenses	(99.3		)	905.0			637.7			(44.0		)	1,399.4
Depreciation, depletion and amortization	—			69.6			38.8			—			108.4
Asset retirement obligation expenses	—			11.0			3.6			—			14.6
Selling and administrative expenses	8.0			52.5			10.7			—			71.2
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(1.8		)	0.1			—			(1.7		)
(Income) loss from equity affiliates	(252.5		)	2.7			0.5			252.5			3.2
Interest expense	61.0			13.7			1.9			(17.4		)	59.2
Interest income	(4.1		)	(5.2		)	(12.2		)	17.4			(4.1		)
Income from continuing operations before income taxes	286.9			165.8			130.2			(252.5		)	330.4
Income tax provision (benefit)	12.9			46.7			(20.4		)	—			39.2
Income from continuing operations, net of income taxes	274.0			119.1			150.6			(252.5		)	291.2
Income (loss) from discontinued operations, net of income taxes	0.1			(7.7		)	(2.1		)	—			(9.7		)
Net income	274.1			111.4			148.5			(252.5		)	281.5
Less: Net income attributable to noncontrolling interests	—			—			7.4			—			7.4
Net income attributable to common stockholders	$	274.1		$	111.4		$	141.1		$	(252.5	)	$	274.1
Comprehensive income attributable to common stockholders	$	82.4		$	121.5		$	205.2		$	(326.7	)	$	82.4

Unaudited Supplemental Condensed Consolidating Statements of Income

	Nine Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	3,539.2		$	2,694.4		$	(173.0	)	$	6,060.6
Costs and expenses
Operating costs and expenses	(313.2		)	2,546.9			2,336.1			(173.0		)	4,396.8
Depreciation, depletion and amortization	—			232.0			238.7			—			470.7
Asset retirement obligation expenses	—			34.7			18.6			—			53.3
Selling and administrative expenses	29.2			154.5			18.7			—			202.4
Other operating (income) loss:
Net gain on disposal or exchange of assets	—			(6.3		)	(1.3		)	—			(7.6		)
(Income) loss from equity affiliates	(407.9		)	5.7			44.8			407.9			50.5
Interest expense	312.1			12.9			350.3			(367.0		)	308.3
Interest income	(224.3		)	(112.6		)	(49.8		)	367.0			(19.7		)
Unrealized (gain) loss on derivatives	—			(69.6		)	69.6			—			—
Income (loss) from continuing operations before income taxes	604.1			741.0			(331.3		)	(407.9		)	605.9
Income tax provision (benefit)	182.7			155.3			(252.5		)	—			85.5
Income (loss) from continuing operations, net of income taxes	421.4			585.7			(78.8		)	(407.9		)	520.4
Loss from discontinued operations, net of income taxes	(1.1		)	(78.0		)	(13.6		)	—			(92.7		)
Net income (loss)	420.3			507.7			(92.4		)	(407.9		)	427.7
Less: Net income attributable to noncontrolling interests	—			—			7.4			—			7.4
Net income (loss) attributable to common stockholders	$	420.3		$	507.7		$	(99.8	)	$	(407.9	)	$	420.3
Comprehensive income attributable to common stockholders	$	585.9		$	548.6		$	34.4		$	(583.0	)	$	585.9

Unaudited Supplemental Condensed Consolidating Statements of Income

	Nine Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Consolidated
	(Dollars in millions)
Total revenues	$	—		$	3,427.8		$	2,456.5		$	(218.2	)	$	5,666.1
Costs and expenses
Operating costs and expenses	(289.3		)	2,619.7			1,846.5			(218.2		)	3,958.7
Depreciation, depletion and amortization	—			210.5			107.1			—			317.6
Asset retirement obligation expenses	—			30.7			12.6			—			43.3
Selling and administrative expenses	24.9			151.0			15.5			—			191.4
Other operating (income) loss:
Net (gain) loss on disposal or exchange of assets	—			(32.3		)	0.9			—			(31.4		)
(Income) loss from equity affiliates	(664.3		)	6.4			2.6			664.3			9.0
Interest expense	162.3			40.6			7.5			(51.3		)	159.1
Interest income	(12.8		)	(15.8		)	(34.4		)	51.3			(11.7		)
Income from continuing operations before income taxes	779.2			417.0			498.2			(664.3		)	1,030.1
Income tax provision	43.1			109.0			86.7			—			238.8
Income from continuing operations, net of income taxes	736.1			308.0			411.5			(664.3		)	791.3
Loss from discontinued operations, net of income taxes	(0.7		)	(6.3		)	(31.9		)	—			(38.9		)
Net income	735.4			301.7			379.6			(664.3		)	752.4
Less: Net income attributable to noncontrolling interests	—			—			17.0			—			17.0
Net income attributable to common stockholders	$	735.4		$	301.7		$	362.6		$	(664.3	)	$	735.4
Comprehensive income attributable to common stockholders	$	664.2		$	337.3		$	405.8		$	(743.1	)	$	664.2

Unaudited Supplemental Condensed Consolidating Balance Sheets

	September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Reclassifications/ Eliminations			Consolidated
	(Dollars in millions)
Assets
Current assets
Cash and cash equivalents	$	237.9		$	0.2		$	409.9	$	—		$	648.0
Accounts receivable, net	5.4			72.1			604.7		—			682.2
Inventories	—			257.4			297.5		—			554.9
Assets from coal trading activities, net	—			9.6			46.6		—			56.2
Deferred income taxes	—			69.6			—		(53.8		)	15.8
Other current assets	317.7			23.3			356.6		—			697.6
Total current assets	561.0			432.2			1,715.3		(53.8		)	2,654.7
Property, plant, equipment and mine development, net	—			5,130.5			7,380.6		—			12,511.1
Investments and other assets	10,700.6			106.0			936.0		(10,058.0		)	1,684.6
Total assets	$	11,261.6		$	5,668.7		$	10,031.9	$	(10,111.8	)	$	16,850.4
Liabilities and Stockholders’ Equity
Current liabilities
Current maturities of long-term debt	$	75.0		$	—		$	49.8	$	—		$	124.8
Payables to (receivables from) affiliates, net	2,272.8			(2,576.6		)	303.8		—			—
Liabilities from coal trading activities, net	—			9.7			10.2		—			19.9
Deferred income taxes	11.6			—			42.2		(53.8		)	—
Accounts payable and accrued expenses	121.1			704.1			819.9		—			1,645.1
Total current liabilities	2,480.5			(1,862.8		)	1,225.9		(53.8		)	1,789.8
Long-term debt, less current maturities	6,132.7			6.6			99.0		—			6,238.3
Deferred income taxes	66.6			126.0			192.4		—			385.0
Notes (receivable from) payable to affiliates, net	(3,421.3		)	(1,097.4		)	4,518.7		—			—
Other noncurrent liabilities	58.5			1,975.4			426.4		—			2,460.3
Total liabilities	5,317.0			(852.2		)	6,462.4		(53.8		)	10,873.4
Peabody Energy Corporation’s stockholders’ equity	5,944.6			6,520.9			3,537.1		(10,058.0		)	5,944.6
Noncontrolling interests	—			—			32.4		—			32.4
Total stockholders’ equity	5,944.6			6,520.9			3,569.5		(10,058.0		)	5,977.0
Total liabilities and stockholders’ equity	$	11,261.6		$	5,668.7		$	10,031.9	$	(10,111.8	)	$	16,850.4

Supplemental Condensed Consolidating Balance Sheets

	December 31, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries		Reclassifications/ Eliminations			Consolidated
	(Dollars in millions)
Assets
Current assets
Cash and cash equivalents	$	283.2		$	0.8		$	515.1	$	—		$	799.1
Accounts receivable, net	5.3			100.8			816.4		—			922.5
Inventories	—			218.1			226.3		—			444.4
Assets from coal trading activities, net	—			14.9			29.7		—			44.6
Deferred income taxes	—			48.0			—		(20.7		)	27.3
Other current assets	305.1			100.7			362.2		—			768.0
Total current assets	593.6			483.3			1,949.7		(20.7		)	3,005.9
Property, plant, equipment and mine development, net	—			4,797.7			6,453.9		—			11,251.6
Investments and other assets	10,300.8			310.8			1,496.1		(9,632.2		)	2,475.5
Total assets	$	10,894.4		$	5,591.8		$	9,899.7	$	(9,652.9	)	$	16,733.0
Liabilities and Stockholders’ Equity
Current liabilities
Current maturities of long-term debt	$	62.5		$	—		$	38.6	$	—		$	101.1
Payables to (receivables from) affiliates, net	2,417.8			(2,529.1		)	111.3		—			—
Liabilities from coal trading activities, net	—			4.2			6.1		—			10.3
Deferred income taxes	11.6			—			9.1		(20.7		)	—
Accounts payable and accrued expenses	69.4			868.8			774.1		—			1,712.3
Total current liabilities	2,561.3			(1,656.1		)	939.2		(20.7		)	1,823.7
Long-term debt, less current maturities	6,428.8			—			127.6		—			6,556.4
Deferred income taxes	76.0			95.3			351.9		—			523.2
Notes (receivable from) payable to affiliates, net	(3,720.0		)	(981.5		)	4,701.5		—			—
Other noncurrent liabilities	63.2			1,923.6			327.1		—			2,313.9
Total liabilities	5,409.3			(618.7		)	6,447.3		(20.7		)	11,217.2
Peabody Energy Corporation’s stockholders’ equity	5,485.1			6,210.5			3,421.7		(9,632.2		)	5,485.1
Noncontrolling interests	—			—			30.7		—			30.7
Total stockholders’ equity	5,485.1			6,210.5			3,452.4		(9,632.2		)	5,515.8
Total liabilities and stockholders’ equity	$	10,894.4		$	5,591.8		$	9,899.7	$	(9,652.9	)	$	16,733.0

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

	Nine Months Ended September 30, 2012
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
	(Dollars in millions)
Cash Flows From Operating Activities
Net cash provided by (used in) continuing operations	$	252.2		$	1,225.0		$	(103.5	)	$	1,373.7
Net cash used in discontinued operations	(1.6		)	(8.0		)	(72.6		)	(82.2		)
Net cash provided by (used in) operating activities	250.6			1,217.0			(176.1		)	1,291.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	—			(188.3		)	(543.8		)	(732.1		)
Federal coal lease expenditures	—			(247.9		)	—			(247.9		)
Investment in Prairie State Energy Campus	—			(9.4		)	—			(9.4		)
Proceeds from disposal of assets	—			59.3			34.2			93.5
Proceeds from sales and maturities of debt and equity securities	—			—			39.0			39.0
Purchases of debt and equity securities	—			—			(23.8		)	(23.8		)
Contributions to joint ventures	—			—			(531.2		)	(531.2		)
Distributions from joint ventures	—			—			527.7			527.7
Repayments of loans from related parties	—			—			720.2			720.2
Advances to related parties	—			—			(743.4		)	(743.4		)
Other, net	—			(3.0		)	(0.2		)	(3.2		)
Net cash used in continuing operations	—			(389.3		)	(521.3		)	(910.6		)
Net cash used in discontinued operations	—			(1.9		)	(9.3		)	(11.2		)
Net cash used in investing activities	—			(391.2		)	(530.6		)	(921.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(285.3		)	(0.3		)	(20.1		)	(305.7		)
Common stock repurchase	(99.9		)	—			—			(99.9		)
Acquisition of MCG Coal Holdings Pty Ltd noncontrolling interests	—			—			(49.8		)	(49.8		)
Dividends paid	(69.1		)	—			—			(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(8.3		)	—			—			(8.3		)
Excess tax benefits related to share-based compensation	3.6			—			—			3.6
Other, net	9.4			—			(1.0		)	8.4
Transactions with affiliates, net	153.7			(826.1		)	672.4			—
Net cash (used in) provided by financing activities	(295.9		)	(826.4		)	601.5			(520.8		)
Net change in cash and cash equivalents	(45.3		)	(0.6		)	(105.2		)	(151.1		)
Cash and cash equivalents at beginning of period	283.2			0.8			515.1			799.1
Cash and cash equivalents at end of period	$	237.9		$	0.2		$	409.9		$	648.0

Unaudited Supplemental Condensed Consolidating Statements of Cash Flows

	Nine Months Ended September 30, 2011
	Parent Company			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Consolidated
	(Dollars in millions)
Cash Flows From Operating Activities
Net cash provided by continuing operations	$	144.7		$	718.3		$	353.7		$	1,216.7
Net cash (used in) provided by discontinued operations	(1.6		)	1.2			(25.8		)	(26.2		)
Net cash provided by operating activities	143.1			719.5			327.9			1,190.5
Cash Flows From Investing Activities
Additions to property, plant, equipment and mine development	—			(211.1		)	(342.3		)	(553.4		)
Federal coal lease expenditures	—			(42.4		)	—			(42.4		)
Investment in Prairie State Energy Campus	—			(29.8		)	—			(29.8		)
Proceeds from disposal of assets	—			12.1			—			12.1
Investment in equity affiliates and joint ventures	—			(2.1		)	(37.7		)	(39.8		)
Proceeds from sales and maturities of debt and equity securities	—			—			53.3			53.3
Purchases of debt and equity securities	—			—			(44.1		)	(44.1		)
Purchases of short-term investments	(75.0		)	—			(25.0		)	(100.0		)
Proceeds from sale of short-term investments	75.0			—			25.0			100.0
Investment in shares of Macarthur Coal Limited	—			—			(45.5		)	(45.5		)
Other, net	—			(4.4		)	—			(4.4		)
Net cash used in continuing operations	—			(277.7		)	(416.3		)	(694.0		)
Net cash used in discontinued operations	—			(7.5		)	(55.3		)	(62.8		)
Net cash used in investing activities	—			(285.2		)	(471.6		)	(756.8		)
Cash Flows From Financing Activities
Payments of long-term debt	(236.9		)	—			(11.5		)	(248.4		)
Dividends paid	(69.1		)	—			—			(69.1		)
Repurchase of employee common stock relinquished for tax withholding	(16.1		)	—			—			(16.1		)
Excess tax benefits related to share-based compensation	6.1			—			—			6.1
Other, net	6.8			—			(6.6		)	0.2
Transactions with affiliates, net	220.2			(438.5		)	218.3			—
Net cash (used in) provided by financing activities	(89.0		)	(438.5		)	200.2			(327.3		)
Net change in cash and cash equivalents	54.1			(4.2		)	56.5			106.4
Cash and cash equivalents at beginning of period	903.8			5.2			386.2			1,295.2
Cash and cash equivalents at end of period	$	957.9		$	1.0		$	442.7		$	1,401.6

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Commitments and Contingencies (Details 2) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended					1 Months Ended	9 Months Ended				3 Months Ended	9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 Monto Coal Pty Limited [Member] AUD	Sep. 30, 2012 Gulf Power Company Litigation [Member] USD ($) T	Sep. 30, 2010 Gulf Power Company Litigation [Member] USD ($)	Jun. 30, 2005 Oklahoma Lead Litigation [Member] USD ($)	Sep. 30, 2012 Oklahoma Lead Litigation [Member] USD ($) sites leadmills	Dec. 31, 2011 Oklahoma Lead Litigation [Member] USD ($)	Oct. 23, 2012 Patriot Coal Company [Member] plaintiffs	Jan. 19, 2012 Pending or Threatened Litigation [Member] Gulf Power Company Litigation [Member] USD ($)	Sep. 30, 2012 Macarthur [Member] USD ($)	Sep. 30, 2012 Macarthur [Member] USD ($)
Loss Contingencies [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 172.2	$ 330.4	$ 605.9	$ 1,030.1									$ (4.4)	$ 98.7
Loss Contingency [Abstract]
Damages sought for alleged past and future tonnage shortfalls						5,000,000
Litigation Settlement Damages Awarded to Plaintiff		20.5		20.5			0
Litigation Settlement, Prejudgement Interest												6.9
Loss Contingency Accrual, at Carrying Value						0
Ownership Percentage In Subsidiaries					51.00%
Loss Contingency, Damages Sought, Value					1,193.2
Number of lead mills formerly operated by predecessor of subsidiary									2
Percentage of total amount of crude ore mined in Picher, Oklahoma									0.15%
Alleged residential yard remediation costs incurred by the EPA due to potentially responsible parties' activities								125
Number of individual plaintiffs involved in class action lawsuit											8
Number of national priority list sites based on the Superfund Amendments and Reauthorization Act of 1986 at which Gold Fields or the former affiliate, has been named a potentially responsible party (PRP)									5
Number of additional national priority list sites in which claims were asserted									13
Total number of national priority list sites									18
Reduced number of national priority list sites due to completion of work, transfer or regulatory inactivity									10
Undiscounted environmental clean-up liabilities, total									48.7	52.5
Undiscounted environmental clean-up liabilities, current									$ 7.8	$ 11.6

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Pension and Postretirement Benefit Costs (Tables)

9 Months Ended

Sep. 30, 2012

Pension Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic pension costs included the following components:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(Dollars in millions)
Service cost for benefits earned	$	0.5		$	0.4		$	1.5		$	1.3
Interest cost on projected benefit obligation	11.7			12.4			35.1			37.3
Expected return on plan assets	(15.9		)	(16.1		)	(47.8		)	(48.3		)
Amortization of prior service cost	0.3			0.3			0.8			0.8
Amortization of actuarial loss	12.1			7.5			36.4			22.5
Net periodic pension costs	$	8.7		$	4.5		$	26.0		$	13.6

Other Postretirement Benefit Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

Net periodic postretirement benefit costs included the following components:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
	(Dollars in millions)
Service cost for benefits earned	$	3.6	$	3.5	$	10.9	$	9.8
Interest cost on accumulated postretirement benefit obligation	13.7		14.5		41.2		43.4
Amortization of prior service cost	0.7		0.8		1.7		1.6
Amortization of actuarial loss	8.1		6.7		24.5		20.2
Net periodic postretirement benefit costs	$	26.1	$	25.5	$	78.3	$	75.0

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Debt (Notes)

9 Months Ended

Sep. 30, 2012

Debt [Abstract]

Debt Disclosure [Text Block]

Debt 

The Company’s total indebtedness as of September 30, 2012 and December 31, 2011 consisted of the following:

	September 30, 2012		December 31, 2011
	(Dollars in millions)
Term Loan	$	450.0	$	468.8
2011 Term Loan Facility	975.0		1,000.0
7.375% Senior Notes due November 2016	650.0		650.0
6.00% Senior Notes due November 2018	1,518.8		1,600.0
6.50% Senior Notes due September 2020	650.0		650.0
6.25% Senior Notes due November 2021	1,339.6		1,500.0
7.875% Senior Notes due November 2026	247.4		247.3
Convertible Junior Subordinated Debentures due December 2066	376.8		375.2
Capital lease obligations	111.6		122.8
Other	43.9		43.4
Total Debt	$	6,363.1	$	6,657.5

6.00% and 6.25% Senior Notes

During the second quarter of 2012, the Company repurchased $81.2 million and $160.4 million in aggregate principal amount of its 6.00% and 6.25% Senior Notes due 2018 and 2021 (the Notes), respectively, with existing cash on hand. The Company recognized a loss on debt extinguishment of $2.8 million associated with these repurchases, which was comprised of $3.4 million of expense related to the write-off of deferred financing costs and a gain of $0.6 million as the repurchases were made below par value. The loss is classified in "Interest expense" in the unaudited condensed consolidated statement of operations for the nine months ended September 30, 2012.

During the third quarter of 2012, the Company commenced an offer to exchange any and all of the Notes outstanding for substantially identical freely tradable debt securities registered under the Securities Act of 1933. The exchange offer was completed in October 2012 and did not affect the Company's indebtedness outstanding.

Other Long-Term Debt

Other than the foregoing, there were no significant changes to the Company's long-term debt subsequent to December 31, 2011. Information regarding the Company's debt is outlined in Note 11 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2011.