|**Organization and Significant Accounting Policies (Tables)**                                 | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                            
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|**Accounting Policies [Abstract]**                                                            |                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Schedule of Product Warranty Liability Activity                                               | The following table presents the Company’s product warranty liability activity in 2021 and 2020:Years ended December 31 (dollars in millions)20212020Balance at beginning of year$142.3$134.3Expense81.256.1Claims settled(51.3)(48.1)Acquired obligations12.2—Balance at end of year$184.4$142.3                                                                                                                                          
|                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Years ended December 31 (dollars in millions)                                                 | 2021                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Balance at beginning of year                                                                  | $                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Expense                                                                                       | 81.2                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Claims settled                                                                                | (51.3)                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Acquired obligations                                                                          | 12.2                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Balance at end of year                                                                        | $                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis                  | Assets (liabilities) measured at fair value on a recurring basis are as follows (dollars in millions):Fair Value Measurement UsingDecember 31, 2021December 31, 2020Quoted prices in active markets for identical assets (Level 1)$188.1$116.5Significant other observable inputs (Level 2)(0.7)(4.3)                                                                                                                                      
|                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                            
|Fair Value Measurement Using                                                                  | December 31, 2021                                                                                                                                                                                                                                                                                                                                                                                                                          
|Quoted prices in active markets for identical assets (Level 1)                                | $                                                                                                                                                                                                                                                                                                                                                                                                                                          
|Significant other observable inputs (Level 2)                                                 | (0.7)                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Schedule of Computation of Basic and Diluted Weighted Average Shares Used in EPS Calculations | The following table sets forth the computation of basic and diluted weighted-average shares used in the earnings per share calculations:202120202019Denominator for basic earnings per share - weighted-average shares outstanding159,906,834161,530,589165,450,441Effect of dilutive stock options, restricted stock and share units1,413,0681,073,5601,260,456Denominator for diluted earnings per share161,319,902162,604,149166,710,897
|                                                                                              |                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                                              | 2021                                                                                                                                                                                                                                                                                                                                                                                                                                       
|Denominator for basic earnings per share - weighted-average shares outstanding                | 159,906,834                                                                                                                                                                                                                                                                                                                                                                                                                                
|Effect of dilutive stock options, restricted stock and share units                            | 1,413,068                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Denominator for diluted earnings per share                                                    | 161,319,902                                                                                                                                                                                                                                                                                                                                                                                                                                

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