Revenue Recognition - Deferred Contract Costs (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Deferred Contract Costs | ||
| Deferred contract costs | $ 4,368 | $ 4,975 |
| Deferred contract costs, current | 1,896 | 2,300 |
| Deferred contract costs, noncurrent | 2,472 | 2,676 |
| Amortization of deferred contract costs | 3,836 | |
| Impairment of deferred contract costs | ||
| Costs to obtain a contract | ||
| Deferred Contract Costs | ||
| Deferred contract costs | 609 | 717 |
| Deferred setup costs | ||
| Deferred Contract Costs | ||
| Deferred contract costs | 1,939 | 2,085 |
| Other deferred fulfillment costs | ||
| Deferred Contract Costs | ||
| Deferred contract costs | $ 1,820 | $ 2,173 |