Stock-Based Compensation - Restricted Share Units (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions |
12 Months Ended |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
| Weighted-Average Grant Date Fair Value |
|
|
|
| Unrecognized compensation cost |
$ 275.7
|
$ 139.6
|
|
| Expected weighted-average recognition period for unrecognized compensation cost |
2 years 8 months 12 days
|
|
|
| Total fair value vested |
$ 73.4
|
$ 64.2
|
$ 51.7
|
| Performance-Based Restricted Share Units |
|
|
|
| Shares Granted |
|
|
|
| Outstanding at the beginning of the period (in shares) |
17
|
59
|
4
|
| Awarded (in shares) |
15
|
46
|
98
|
| Vested (in shares) |
(2)
|
(54)
|
(4)
|
| Cancelled (in shares) |
(19)
|
(34)
|
(39)
|
| Outstanding at the end of the period (in shares) |
11
|
17
|
59
|
| Weighted-Average Grant Date Fair Value |
|
|
|
| Outstanding at the beginning of the period (in dollars per share) |
$ 36.49
|
$ 61.17
|
$ 87.14
|
| Awarded (in dollars per share) |
54.08
|
36.49
|
64.33
|
| Vested (in dollars per share) |
38.78
|
60.16
|
87.14
|
| Cancelled (in dollars per share) |
40.63
|
36.49
|
69.14
|
| Outstanding at the end of the period (in dollars per share) |
$ 54.17
|
$ 36.49
|
$ 61.17
|
| Unrecognized compensation cost |
$ 0.0
|
$ 0.0
|
|
| Service-based restricted share units |
|
|
|
| Shares Granted |
|
|
|
| Outstanding at the beginning of the period (in shares) |
4,324
|
3,512
|
2,756
|
| Awarded (in shares) |
5,737
|
2,512
|
2,313
|
| Vested (in shares) |
(1,608)
|
(1,307)
|
(1,374)
|
| Cancelled (in shares) |
(614)
|
(393)
|
(183)
|
| Outstanding at the end of the period (in shares) |
7,839
|
4,324
|
3,512
|
| Weighted-Average Grant Date Fair Value |
|
|
|
| Outstanding at the beginning of the period (in dollars per share) |
$ 41.86
|
$ 50.89
|
$ 48.62
|
| Awarded (in dollars per share) |
47.95
|
33.50
|
45.49
|
| Vested (in dollars per share) |
45.66
|
49.12
|
37.60
|
| Cancelled (in dollars per share) |
44.02
|
44.96
|
48.48
|
| Outstanding at the end of the period (in dollars per share) |
$ 45.37
|
$ 41.86
|
$ 50.89
|