XML 69 R56.htm IDEA: XBRL DOCUMENT v3.20.2
Share-based compensation plans - Stock activity - RSU, PSU, DSU (Details) - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Restricted Stock Units    
Shares (in thousands)    
Nonvested, beginning balance, shares 172,700  
Granted, shares 93,200  
Forfeited, shares (11,300)  
Conversion to cash settled awards, shares (1,300)  
Vested, shares (84,900)  
Nonvested, ending balance, shares 168,400 172,700
Weighted-Average Grant Date Fair Value Per Share    
Nonvested, beginning balance (dollars per share) $ 71.87  
Granted (dollars per share) 71.78  
Forfeited (dollars per share) 78.81  
Converted to cash settled awards (dollars per share) 72.80  
Vested (dollars per share) 67.41  
Nonvested, ending balance (dollars per share) $ 73.60 $ 71.87
Performance Shares Units PSU    
Shares (in thousands)    
Nonvested, beginning balance, shares 564,200  
Granted, shares 248,400  
Forfeited, shares (22,000.0)  
Conversion to cash settled awards, shares (4,600)  
Vested, shares (204,300)  
Nonvested, ending balance, shares 581,700 564,200
Weighted-Average Grant Date Fair Value Per Share    
Nonvested, beginning balance (dollars per share) $ 70.10  
Granted (dollars per share) 83.68  
Forfeited (dollars per share) 76.23  
Converted to cash settled awards (dollars per share) 65.42  
Vested (dollars per share) 56.72  
Nonvested, ending balance (dollars per share) $ 80.40 $ 70.10
Actual shares earned and distributed (shares)   394,000.0
Target shares (shares)   204,300
Deferred Stock Units    
Shares (in thousands)    
Nonvested, beginning balance, shares 12,100  
Granted, shares 21,600  
Vested, shares (12,100)  
Nonvested, ending balance, shares 21,600 12,100
Weighted-Average Grant Date Fair Value Per Share    
Nonvested, beginning balance (dollars per share) $ 79.69  
Granted (dollars per share) 40.46  
Vested (dollars per share) 79.69  
Nonvested, ending balance (dollars per share) $ 40.46 $ 79.69