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Property, Plant and Equipment and Operating Leases
 3 Months Ended
Mar. 31, 2026
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment and Operating Leases Property, Plant and Equipment and Operating Leases.
March 31, 2026December 31, 2025
Cost$224.8 $225.6 
Less accumulated depreciation(84.0)(81.0)
Right-of-use operating lease assets152.2 141.4 
Property, plant and equipment, net$293.0 $286.0 

Depreciation expense. Depreciation expense was $6.4 and $8.5 for the three months ended March 31, 2026 and 2025, respectively.

Operating lease liabilities. Our current operating lease liabilities, included in Other current liabilities in our Statement of Financial Position, were $55.4 and $51.8 as of March 31, 2026 and December 31, 2025, respectively. Our non-current operating lease liabilities, included in Other liabilities in our Statement of Financial Position, were $98.8 and $91.9 as of March 31, 2026 and December 31, 2025, respectively.