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Company and Basis of Presentation
3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Company and Basis of Presentation
Basis of Presentation
The accompanying Unaudited Consolidated Financial Statements have been prepared by TimkenSteel Corporation (the Company or TimkenSteel) in accordance with generally accepted accounting principles in the United States (U.S. GAAP) for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) and disclosures considered necessary for a fair presentation have been included. For further information, refer to TimkenSteelā€™s Audited Consolidated Financial Statements and Notes included in its Annual Report on Form 10-K for the year ended December 31, 2018.