Employee Benefits and Share-Based Compensation - Summary of Restricted Unit Activity (Details)
|
12 Months Ended |
|
Dec. 31, 2019
$ / shares
shares
|
|---|
| "Time-Based Units" ("TBUs") |
|
| Number of Restricted Share Awards |
|
| Non-vested as of January 1, 2019 | shares |
2,973,032
|
| Granted | shares |
1,929,495
|
| Vested | shares |
(1,430,291)
|
| Forfeited or expired | shares |
(226,611)
|
| Non-vested as of December 31, 2019 | shares |
3,245,625
|
| Non-vested and expected to vest as of December 31, 2019 | shares |
3,245,625
|
| Weighted- Average Grant-Date Fair Value |
|
| Non-vested as of January 1, 2019 | $ / shares |
$ 53.98
|
| Granted | $ / shares |
55.00
|
| Vested | $ / shares |
53.02
|
| Forfeited or expired | $ / shares |
55.04
|
| Non-vested as of December 31, 2019 | $ / shares |
54.94
|
| Non-vested and expected to vest as of December 31, 2019 | $ / shares |
$ 54.94
|
| Performance-Based RSU Awards |
|
| Number of Restricted Share Awards |
|
| Non-vested as of January 1, 2019 | shares |
825,614
|
| Granted | shares |
462,282
|
| Vested | shares |
(121,000)
|
| Forfeited or expired | shares |
(37,500)
|
| Non-vested as of December 31, 2019 | shares |
1,129,396
|
| Non-vested and expected to vest as of December 31, 2019 | shares |
483,976
|
| Weighted- Average Grant-Date Fair Value |
|
| Non-vested as of January 1, 2019 | $ / shares |
$ 56.58
|
| Granted | $ / shares |
55.27
|
| Vested | $ / shares |
56.27
|
| Forfeited or expired | $ / shares |
56.27
|
| Non-vested as of December 31, 2019 | $ / shares |
56.09
|
| Non-vested and expected to vest as of December 31, 2019 | $ / shares |
$ 56.61
|
| Market-Based RSU Awards |
|
| Number of Restricted Share Awards |
|
| Non-vested as of January 1, 2019 | shares |
50,000
|
| Non-vested as of December 31, 2019 | shares |
50,000
|
| Weighted- Average Grant-Date Fair Value |
|
| Non-vested as of January 1, 2019 | $ / shares |
$ 59.43
|
| Non-vested as of December 31, 2019 | $ / shares |
$ 59.43
|