XML 129 R110.htm IDEA: XBRL DOCUMENT v3.10.0.1
Share-Based Transactions - Employee Share-Based Transactions, PSU Activity (Details) - Performance share units (PSUs) [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share Based Compensation Arrangement [Abstract]    
Shares, beginning balance 54 18
Shares, granted 31 36
Shares, ending balance 85 54
Weighted-Average Exercise Price Per Share [Abstract]    
Weighted-average measurement-date fair value per share, beginning balance $ 67.42 $ 41.88
Weighted-average measurement-date fair value per share, granted 100.55 80.45
Weighted-average measurement-date fair value per share, ending balance $ 79.34 $ 67.42