XML 17 R67.htm IDEA: XBRL DOCUMENT v3.20.1
Stockholders' Equity - Summary of Exercise Price (Detail)
shares in Millions
9 Months Ended
Sep. 30, 2019
$ / shares
shares
$2.96 to $5.74 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices Minimum $ 2.96
Range of Exercise Prices Maximum $ 5.74
Options Outstanding Shares | shares 2.1
Weighted Average Remaining Contractual Life 9 months 18 days
Weighted Average Exercise Price Per Share, Options Outstanding $ 5.74
Options Exercisable Shares | shares 2.1
Weighted Average Exercise Price Per Share, Options Exercisable $ 5.74
$5.75 to $22.99 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices Minimum 5.75
Range of Exercise Prices Maximum $ 22.99
Options Outstanding Shares | shares 5.9
Weighted Average Remaining Contractual Life 9 years 1 month 6 days
Weighted Average Exercise Price Per Share, Options Outstanding $ 18.34
Options Exercisable Shares | shares 0.6
Weighted Average Exercise Price Per Share, Options Exercisable $ 17.72
$23.00 to $42.32 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices Minimum 23.00
Range of Exercise Prices Maximum $ 42.32
Options Outstanding Shares | shares 1.4
Weighted Average Remaining Contractual Life 6 years 6 months
Weighted Average Exercise Price Per Share, Options Outstanding $ 33.18
Options Exercisable Shares | shares 1.3
Weighted Average Exercise Price Per Share, Options Exercisable $ 32.62
$2.96 to $42.32 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices Minimum 2.96
Range of Exercise Prices Maximum $ 42.32
Options Outstanding Shares | shares 9.4
Weighted Average Remaining Contractual Life 6 years 9 months 18 days
Weighted Average Exercise Price Per Share, Options Outstanding $ 17.71
Options Exercisable Shares | shares 4.0
Weighted Average Exercise Price Per Share, Options Exercisable $ 16.10