Share-Based Incentive Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions |
3 Months Ended |
Mar. 31, 2020 |
Mar. 31, 2019 |
| Share-based Payment Arrangement [Abstract] |
|
|
| Stock options vested at end of period, number (in shares) |
7,743,262
|
|
| Stock options vested at end of period, weighted average exercise price (in dollars per share) |
$ 112.65
|
|
| Stock options vested at end of period, weighted average contractual life remaining (in years) |
6 years
|
|
| Stock options vested at end of period, aggregate intrinsic value |
$ 32
|
|
| Stock options exercisable at end of period, number (in shares) |
5,394,082
|
|
| Stock options exercisable at end of period, weighted average exercise price (in dollars per share) |
$ 104.00
|
|
| Stock options exercisable at end of period, weighted average contractual life remaining (in years) |
4 years 8 months 12 days
|
|
| Stock options exercisable at end of period, aggregate intrinsic value |
$ 32
|
|
| Total compensation cost recognized in earnings for all share-based incentive compensation awards |
46
|
$ 45
|
| Tax benefit recognized in earnings related to compensation costs |
8
|
$ 8
|
| Total unrecognized compensation cost related to all nonvested share-based incentive compensation awards |
$ 231
|
|
| Weighted-average period of recognition for unrecognized compensation cost (in years) |
2 years 1 month 6 days
|
|