Document and Entity Information
Document and Entity Information Document - USD ($) | 12 Months Ended | ||
Dec. 31, 2019 | Feb. 18, 2020 | Jun. 30, 2019 | |
Document Information [Line Items] | |||
Document Type | 10-K/A | ||
Document Annual Report | true | ||
Document Period End Date | Dec. 31, 2019 | ||
Document Transition Report | false | ||
Entity File Number | 1-13696 | ||
Entity Registrant Name | AK STEEL HOLDING CORPORATION | ||
Amendment Flag | true | ||
Amendment Description | This Amendment No. 1 to Form 10-K (the “Amendment”) amends the Annual Report on Form 10-K for the fiscal year ended December 31, 2019 originally filed on February 20, 2020 (the “Original Filing”) by AK Steel Holding Corporation, a Delaware corporation (“AK Steel,” the “Company,” “we,” or “us”). We are filing the Amendment to present the information required by Part III of Form 10-K as we will not file our definitive proxy statement within 120 days of the end of our year ended December 31, 2019. The reference on the cover page of the 2019 Form 10-K to the incorporation by reference of portions of AK Steel Holding Corporation’s definitive proxy statement into Part III of the 2019 Form 10-K is hereby deleted. Except as described above, no other changes have been made to the Original Filing. The Original Filing continues to speak as of the date of the Original Filing, and we have not updated the disclosures contained therein to reflect any events that may have occurred at a date subsequent to the date of the Original Filing. | ||
Entity Central Index Key | 0000918160 | ||
Current Fiscal Year End Date | --12-31 | ||
Document Fiscal Year Focus | 2019 | ||
Document Fiscal Period Focus | FY | ||
Entity Incorporation, State or Country Code | DE | ||
Entity Tax Identification Number | 31-1401455 | ||
Entity Address, Address Line One | 9227 Centre Pointe Drive | ||
Entity Address, City or Town | West Chester | ||
Entity Address, State or Province | OH | ||
Entity Address, Postal Zip Code | 45069 | ||
City Area Code | (513) | ||
Local Phone Number | 425-5000 | ||
Title of 12(b) Security | Common Stock $0.01 Par Value | ||
Trading Symbol | AKS | ||
Security Exchange Name | NYSE | ||
Entity Well-known Seasoned Issuer | Yes | ||
Entity Voluntary Filers | No | ||
Entity Current Reporting Status | Yes | ||
Entity Interactive Data Current | Yes | ||
Entity Filer Category | Large Accelerated Filer | ||
Entity Small Business | false | ||
Entity Emerging Growth Company | false | ||
Entity Shell Company | false | ||
Entity Public Float | $ 743,645,887 | ||
Entity Common Stock, Shares Outstanding | 316,909,268 | ||
Documents Incorporated by Reference [Text Block] | None. |