CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 587.0	$ 709.2
Accounts receivable, net of allowance for credit losses of $0.0 at September 30, 2021 and December 31, 2020	276.0	244.8
Inventories	224.5	261.6
Other current assets	223.8	204.7
Total current assets	1,311.3	1,420.3
Property, plant, equipment and mine development, net	2,952.0	3,051.1
Operating lease right-of-use assets	38.4	49.9
Investments and other assets	140.8	140.9
Deferred income taxes	0.0	4.9
Total assets	4,442.5	4,667.1
Current liabilities
Current portion of long-term debt	59.5	44.9
Accounts payable and accrued expenses	761.7	745.7
Total current liabilities	821.2	790.6
Long-term debt, less current portion	1,268.7	1,502.9
Deferred income taxes	13.0	35.0
Asset retirement obligations	641.9	650.5
Accrued postretirement benefit costs	402.2	413.2
Operating lease liabilities, less current portion	31.6	42.1
Other noncurrent liabilities	221.6	251.5
Total liabilities	3,400.2	3,685.8
Stockholders’ equity
Additional paid-in capital	3,605.1	3,364.6
Treasury stock, at cost — 43.0 and 42.7 common shares as of September 30, 2021 and December 31, 2020	(1,370.2)	(1,368.9)
Accumulated deficit	(1,426.2)	(1,273.3)
Accumulated other comprehensive income	171.6	205.8
Peabody Energy Corporation stockholders’ equity	981.9	929.6
Noncontrolling interests	60.4	51.7
Total stockholders’ equity	1,042.3	981.3
Total liabilities and stockholders’ equity	$ 4,442.5	$ 4,667.1
Treasury stock, shares (in shares)	43,000,000.0	42,700,000
Preferred Stock
Stockholders’ equity
Preferred Stock — $0.01 per share par value; 100.0 shares authorized, no shares issued or outstanding as of September 30, 2021 and December 31, 2020	$ 0.0	$ 0.0
Preferred stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000.0	100,000,000.0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Series Common Stock
Stockholders’ equity
Common Stock — $0.01 per share par value; 450.0 shares authorized, 165.3 shares issued and 122.3 shares outstanding as of September 30, 2021 and 140.5 shares issued and 97.8 shares outstanding as of December 31, 2020	$ 0.0	$ 0.0
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000.0	50,000,000.0
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0
Common Stock
Stockholders’ equity
Common Stock — $0.01 per share par value; 450.0 shares authorized, 165.3 shares issued and 122.3 shares outstanding as of September 30, 2021 and 140.5 shares issued and 97.8 shares outstanding as of December 31, 2020	$ 1.6	$ 1.4
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	450,000,000.0	450,000,000.0
Common stock, shares issued (in shares)	165,300,000	140,500,000
Common stock, shares outstanding (in shares)	122,300,000	97,800,000