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Net revenues (Tables) | 9 Months Ended
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Sep. 30, 2021
Revenues [Abstract] |
Schedule of net revenues disaggregated by customer | In the following table, the Company’s revenue is disaggregated by customer classification:
| Three months ended September 30, |  | Nine months ended September 30,
| 2020 |  | 2021 |  | 2020 |  | 2021
Global clients | $ | 824,175 |  |  | $ | 920,628 |  |  | $ | 2,409,047 |  |  | $ | 2,667,036 |
GE | 111,348 |  | 95,109 |  | 349,762 |  | 282,898
Total net revenues | $ | 935,523 |  |  | $ | 1,015,737 |  |  | $ | 2,758,809 |  |  | $ | 2,949,934 |
Schedule of details of contract balances | The following table shows the details of the Company’s contract balances:
| As of December 31, 2020 |  | As of September 30, 2021
Contract assets (Note a) | $ | 15,805 |  |  | $ | 15,973 |
Contract liabilities (Note b) |  |  |
Deferred transition revenue | $ | 130,804 |  |  | $ | 156,308 |
Advance from customers | $ | 92,673 |  |  | $ | 78,184 |
(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 September 30, 2021:
Particulars | Total |  | Less than 1 year |  | 1-3 years |  | 3-5 years |  | After 5 years
Transaction price allocated to remaining performance obligations | $ | 234,492 |  |  | $ | 150,322 |  |  | $ | 67,690 |  |  | $ | 13,997 |  |  | $ | 2,483 |
Schedule of contract cost assets | The following table provides details of the Company’s contract cost assets:
| Three months ended September 30, |  | Nine months ended September 30,
| 2020 |  | 2021 |  | 2020 |  | 2021
Particulars | Sales incentive programs |  | Transition activities |  | Sales incentive programs |  | Transition activities |  | Sales incentive programs |  | Transition activities |  | Sales incentive programs |  | Transition activities
Opening balance | $ | 32,182 |  |  | $ | 178,570 |  |  | $ | 31,559 |  |  | $ | 210,747 |  |  | $ | 35,366 |  |  | $ | 170,132 |  |  | $ | 33,390 |  |  | $ | 192,507 |
Closing balance | 30,047 |  | 181,747 |  | 31,058 |  | 209,320 |  | 30,047 |  | 181,747 |  | 31,058 |  | 209,320
Amortization | 6,094 |  | 17,935 |  | 5,041 |  | 23,028 |  | 14,329 |  | 50,397 |  | 14,576 |  | 58,644

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
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