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Net revenues (Tables) | 12 Months Ended
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Dec. 31, 2021
Revenues [Abstract] |
Schedule of net revenues disaggregated by customer | In the following tables, the Company’s revenue is disaggregated by customer classification.
| Year ended December 31,
| 2019 |  | 2020 |  | 2021
Global Clients | $ | 3,042,452 |  |  | $ | 3,250,527 |  |  | $ | 3,646,007 |
GE | 478,091 |  |  | 458,850 |  |  | 376,204 |
Total net revenues | $ | 3,520,543 |  |  | $ | 3,709,377 |  |  | $ | 4,022,211 |
Schedule of details of Company's contract liabilities | The following table provides details of the Company’s contract balances:
| As of December 31,
| 2020 |  | 2021
Contract assets (Note a) | $ | 15,805 |  |  | $ | 13,741 |
Contract liabilities (Note b) |  |  |
Deferred transition revenue | $ | 130,804 |  |  | $ | 155,077 |
Advance from customers | $ | 92,673 |  |  | $ | 85,747 |
(a) Included in "prepaid expenses and other current assets" and "other assets" in the consolidated balance sheet. (b) Included in "accrued expenses and other current liabilities" and "other liabilities" in the consolidated balance sheet.
Schedule of estimated revenue expected to be recognized in the future related to remaining performance obligation | The following table includes estimated revenue expected to be recognized in the future related to remaining performance obligations as of December 31, 2021:
Particulars | Total |  | Less than 1 year |  | 1-3 years |  | 3-5 years |  | After 5 years
Transaction price allocated to remaining performance obligations | $ | 240,824 |  |  | $ | 160,606 |  |  | $ | 64,184 |  |  | $ | 13,924 |  |  | $ | 2,110 |
Schedule of contract cost assets | The following table provides details of the Company’s contract cost assets:
| As of December 31, 2020 |  | As of December 31, 2021
Particulars | Sales incentive programs |  | Transition activities |  | Sales incentive programs |  | Transition activities
Opening balance | $ | 35,366 |  |  | $ | 170,132 |  |  | $ | 33,390 |  |  | $ | 192,507 |
Closing balance | 33,390 |  |  | 192,507 |  |  | 32,296 |  |  | 206,498 |
Amortization | 19,960 |  |  | 68,770 |  |  | 22,227 |  |  | 79,779 |

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