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Goodwill (Tables)
 3 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill by segment
Goodwill by segment is as follows:
March 31,
2020		December 31,
2019
 (in millions)
Construction Products Group$294.1  $166.2  
Energy Equipment Group419.8  416.9  
Transportation Products Group38.8  38.8  
$752.7  $621.9