XML 82 R71.htm IDEA: XBRL DOCUMENT v3.19.2
Earnings Per Share and Weighted-Average Shares Outstanding - Additional Information (Detail) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Earnings Per Share [Abstract]      
Anti-dilutive securities excluded from computation of fully diluted earnings per share amount 62.8 102.8 90.8