Document and Entity Information Document Document - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 15, 2017	Jun. 30, 2016
Document Information [Line Items]
Entity Registrant Name	PEABODY ENERGY CORP
Entity Central Index Key	0001064728
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-K/A
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Amendment Flag	true
Amendment Description	prior period correction
Entity Common Stock, Shares Outstanding		18,491,188
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 25.3