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Property, Plant, and Equipment, net (Notes)
 6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net
6. Property, Plant, and Equipment, net

The following table details the major components of property, plant, and equipment, net:
(in millions)June 30, 2021December 31, 2020
Land$13.2 $8.0 
Buildings and improvements118.4 111.9 
Machinery, equipment, and other563.7 562.8 
Subtotal695.3 682.7 
Less accumulated depreciation(505.1)(491.2)
Total$190.2 $191.5 

Depreciation expense totaled $11.8 million and $12.0 million for the three months ended June 30, 2021 and 2020, respectively. For the six months ended June 30, 2021 and 2020, depreciation expense totaled $23.6 million and $24.0 million, respectively.