Share-Based Compensation Plans - Outstanding Restricted Stock Unit Awards (Detail) - Restricted Stock Unit Awards - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
NUMBER | ||
Balance at beginning of period (in shares) | 2,644,762 | |
Granted (in shares) | 772,848 | |
Distributed (in shares) | (1,245,412) | |
Forfeited (in shares) | (26,547) | |
Balance at end of period (in shares) | 2,145,651 | |
Units Convertible, at the end of year (in shares) | 19,770 | |
AGGREGATE INTRINSIC VALUE | ||
AGGREGATE INTRINSIC VALUE | $ 199.8 | $ 281.0 |
Units Convertible, at the end of year | $ 1.8 |