XML 39 R98.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Share-Based Compensation Plans - Relative Total Shareholder Return Performance Unit Activity (Details) - RTSR - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Non-vested Performance- Based Share Units      
Beginning balance (in shares) 62 39  
Granted (in shares) 80 38  
Vested (in shares) 0    
Forfeited (in shares) 0 (15)  
Ending balance (in shares) 142 62 39
Weighted-Average Grant Date Fair Value Per Share      
Nonvested shares outstanding (in shares) $ 63.02 $ 78.35 $ 64.82
Granted (in dollars per share) 55.61 101.13 $ 64.82
Forfeited (in dollars per share) 0 $ 101.13  
Vested (in dollars per share) $ 0    
Weighted- Average Remaining Term in Years [1] 1 year 6 months 1 year 8 months 12 days  
Aggregate Intrinsic Value $ 7.3 $ 2.4  
[1]
* Midpoint used in calculation.