Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 1,068.1	$ 872.3
Restricted Cash and Investments, Current	80.7	54.3
Restricted Cash and Cash Equivalents, Current	1,000.0	0.0
Accounts receivable, net of allowance for doubtful accounts of $12.8 at March 31, 2017 and $13.1 at December 31, 2016	312.1	473.0
Inventories	250.8	203.7
Assets from coal trading activities, net	0.6	0.7
Other current assets	493.9	486.6
Total current assets	3,206.2	2,090.6
Property, Plant and Equipment, Net	8,653.9	8,776.7
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	0.0	0.0
Investments and other assets	976.4	910.4
Total assets	12,836.5	11,777.7
Current liabilities
Current portion of long-term debt	18.2	20.2
Liabilities from coal trading activities, net	0.7	1.2
Accounts payable and accrued expenses	967.3	990.4
Liabilities, Current	986.2	1,011.8
Long-term debt, less current portion	950.5	0.0
Deferred income taxes	179.2	173.9
Asset retirement obligations	707.0	717.8
Accrued postretirement benefit costs	753.9	756.3
Other noncurrent liabilities	511.1	496.2
Total liabilities not subject to compromise	4,087.9	3,156.0
Liabilities subject to compromise	8,416.7	8,440.2
Total liabilities	12,504.6	11,596.2
Stockholders' equity
Common Stock	137.3
Additional paid-in capital	2,423.9	2,422.0
Treasury stock, at cost — 0.8 shares as of March 31, 2017 and December 31, 2016	(371.9)	(371.8)
Accumulated deficit	(1,284.1)	(1,399.5)
Accumulated other comprehensive loss	(448.5)	(477.0)
Peabody Energy Corporation stockholders' equity	319.6	173.9
Noncontrolling interests	12.3	7.6
Total stockholders' equity	331.9	181.5
Total liabilities and stockholders' equity	12,836.5	11,777.7
Preferred Stock [Member]
Stockholders' equity
Preferred Stock	0.0	0.0
Perpetual Preferred Stock [Member]
Stockholders' equity
Preferred Stock	0.0	0.0
Series Common Stock [Member]
Stockholders' equity
Common Stock	0.0	0.0
Common Stock [Member]
Stockholders' equity
Common Stock	$ 0.2	$ 0.2