Condensed Consolidated Balance Sheets - Successor - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 1,371.0	$ 1,012.1
Restricted cash	0.0	40.1
Accounts receivable, net of allowance for doubtful accounts of $4.4 at September 30, 2018 and $4.6 at December 31, 2017	444.9	552.1
Inventories	277.1	291.3
Other current assets	213.9	294.4
Total current assets	2,306.9	2,190.0
Property, plant, equipment and mine development, net	4,851.9	5,111.9
Collateral arrangements	0.0	323.1
Investments and other assets	276.4	470.6
Deferred tax assets, noncurrent	85.5	85.6
Total assets	7,520.7	8,181.2
Current liabilities
Current portion of long-term debt	42.0	42.1
Accounts payable and accrued expenses	1,082.2	1,202.8
Total current liabilities	1,124.2	1,244.9
Long-term debt, less current portion	1,334.2	1,418.7
Deferred income taxes	4.8	5.4
Asset retirement obligations	670.7	657.0
Accrued postretirement benefit costs	723.4	730.0
Other noncurrent liabilities	374.8	469.4
Total liabilities	4,232.1	4,525.4
Stockholders’ equity
Peabody Energy Corporation stockholders’ equity	3,240.6	3,606.4
Noncontrolling interests	48.0	49.4
Total stockholders’ equity	3,288.6	3,655.8
Total liabilities and stockholders’ equity	7,520.7	8,181.2
Preferred Stock
Stockholders’ equity
Total stockholders’ equity	0.0	576.0
Common Stock
Stockholders’ equity
Total stockholders’ equity	1.4	1.0
Additional Paid-in Capital
Stockholders’ equity
Additional paid-in capital	3,295.1	2,590.3
Total stockholders’ equity	3,295.1	2,590.3
Treasury Stock
Stockholders’ equity
Treasury stock, at cost	(890.0)	(175.9)
Total stockholders’ equity	(890.0)	(175.9)
Retained earnings
Stockholders’ equity
Retained earnings	837.2	613.6
Total stockholders’ equity	837.2	613.6
Accumulated Other Comprehensive Income (Loss)
Stockholders’ equity
Accumulated other comprehensive (loss) income	(3.1)	1.4
Total stockholders’ equity	(3.1)	1.4
Convertible Preferred Stock
Stockholders’ equity
Preferred stock	0.0	576.0
Preferred Stock
Stockholders’ equity
Preferred stock	0.0	0.0
Series Common Stock
Stockholders’ equity
Common Stock	0.0	0.0
Common Stock \| Common Stock
Stockholders’ equity
Common Stock	$ 1.4	$ 1.0

Collateral posted as

No definition available.

Name:	btu_CashCollateral
Namespace Prefix:	btu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.