Commitments - Extended Warranty Liability (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Dec. 31, 2020 |
|
| Movement in deferred income | |||
| Amortization of deferred revenue | $ (4,200) | ||
| Current portion | 14,197 | $ 12,833 | |
| Noncurrent portion | 4,153 | $ 4,301 | |
| Extended Warranty | |||
| Movement in deferred income | |||
| Beginning Balance | 425 | $ 477 | |
| Revenue deferred for new extended warranty contracts | 18 | 40 | |
| Amortization of deferred revenue | (53) | (57) | |
| Other | (6) | (13) | |
| Ending Balance | 383 | 447 | |
| Current portion | 199 | 219 | |
| Noncurrent portion | $ 185 | $ 228 | |