XML 114 R97.htm IDEA: XBRL DOCUMENT v3.20.4
Share-Based Compensation - Summary of Changes In Stock Options (Detail)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Shares outstanding, beginning balance (in shares) | shares 1.6
Granted (in shares) | shares 1.1
Exercised (in shares) | shares 0.0
Forfeited (in shares) | shares 0.0
Shares outstanding, ending balance (in shares) | shares 2.7
Options exercisable, end of year (in shares) | shares 0.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Weighted average exercise price, beginning balance (in USD per share) | $ / shares $ 17
Weighted-average exercise price, granted (in USD per share) | $ / shares 20
Weighted-average exercise price, exercised (in USD per share) | $ / shares 18
Weighted-average exercise price, forfeited (in USD per share) | $ / shares 20
Weighted average exercise price, ending balance (in USD per share) | $ / shares 18
Weighted average exercise price, options exercisable, end of year (in USD per share) | $ / shares $ 15
Weighted average remaining life, outstanding (years) 8 years 2 months 12 days
Aggregate intrinsic value, outstanding | $ $ 7.7
Weighted average remaining life, exercisable (years) 6 months
Aggregate intrinsic value, exercisable | $ $ 1.4