|**Product Warranties**                           | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
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|**Guarantees and Product Warranties [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Product Warranties                               | Product WarrantiesThe Company offers warranties on the sales of certain of its products with terms that are consistent with the market and records an accrual for the estimated future claims. The increase in our reserve for product warranties as of  the first quarter ended 2022 compared to the prior year period was primarily due to increased steel prices and the acquisition of Giant. Refer to Note 3, "Acquisition", for additional information regarding the acquisition of Giant.The following table presents the Company’s warranty liability activity:(dollars in millions)Three Months EndedMarch 31,20222021Balance at January 1,$184.4$142.3Expense13.912.6Claims settled(15.4)(13.3)Balance at March 31,$182.9$141.6
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|(dollars in millions)                            | Three Months EndedMarch 31,                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                                                 | 2022                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Balance at January 1,                            | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Expense                                          | 13.9                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Claims settled                                   | (15.4)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Balance at March 31,                             | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        

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duration X- DefinitionThe entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period.
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