Exit activities (Tables)
 3 Months Ended
Mar. 31, 2020
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
The following table summarizes the costs incurred during the three months ended March 31, 2020 related to these restructurings:

Three Months Ended March 31,
In millionsLocation in Statement of Operations2020
Severance costs and other(a)
Business Combinations and Shutdown and Other Special Charges, Net$4.5  
Accelerated depreciationCost of Sales4.6  
Inventory and asset write-offsBusiness Combinations and Shutdown and Other Special Charges, Net8.5  
Total$17.6  
(a) Costs incurred include activities for post-employment benefits, retention bonuses, incentives and professional services.
Schedule of Restructuring Reserve by Type of Cost
The following tables summarizes the balance of accrued expenses related to restructuring:

In millions
Balance at December 31, 2019$7.1  
Costs incurred4.3  
Payments(0.4) 
Adjustments(a)
0.2  
Balance at March 31, 2020$11.2  
(a) Adjustments related to changes in estimates of severance costs.