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Accounts receivable - Net: (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounts receivable - Net: |
Schedule of accounts receivable - net |
|  | December 31,
|  | 2018 |  | 2019
Clients |  | Ps. | 991,033 |  | Ps. | 1,195,559
Less: impairment provision |  |  | (179,639) |  |  | (191,766)
Adoption effect IFRS 9 |  |  | (18,284) |  |  |
Total accounts receivable |  | Ps. | 793,110 |  | Ps. | 1,003,793
Schedule of maturity analysis of past due accounts receivable and movements in impairment provision |
Provision for impairment at January 1, 2018 |  | Ps. | 173,398
Application to the provision in Mexico during the period |  |  | (35,403)
Aerostar’s provision impairment |  |  | 20,128
Airplan’s provision impairment |  |  | 3,232
Valuation IFRS 9 provision |  |  | 18,284
Provision for impairment at December 31,2018 |  |  | 179,639
Application, net of Mexico's estimate during the period |  |  | (369)
Application, net of Aerostar's estimate during the period |  |  | (5,585)
Airplan's provision impairment |  |  | 18,081
Provision for impairment at December 31,2019 |  | Ps. | 191,766
Schedule of provision for losses |
|  |  |  |  |  |  |  |  |  | More than |
|  | Due to expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | 365 |
Expected loss rate: |  |  |  |  |  |  |  |  |  |  |
Mexico |  | 0.02 | % | 0.02 | % | 0.02 | % | 100 | % | 100 | %
Aerostar |  | 1.00 | % | 2.5% - 5.0 | % | 15.00 | % | 50 | % | 100 | %
Airplan |  | 0.83 | % | 0.83 | % | 0.83 | % | 100 | % | 100 | %
|  |  |  |  |  |  |  |  |  |  |  |  |  | Moren |  | Total estimate
|  | Due to expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | than 365 |  | 12/31/2018
At December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mexico’s accounts receivables |  | Ps. | 93 |  | Ps. | 604 |  | Ps. | 1,252 |  | Ps. | 495 |  | Ps. | 128,804 |  | Ps. | 131,248
Mexico’s provision impairment |  |  |  |  |  |  |  |  |  |  |  | 495 |  |  | 128,804 |  |  | 129,299
Aerostar’s accounts receivables |  |  | 154,235 |  |  | 49,645 |  |  | 239 |  |  | 5,790 |  |  | 36,738 |  |  | 246,647
Aerostar’s provision impairment |  |  | 386 |  |  | 124 |  |  | 36 |  |  | 5,790 |  |  | 36,738 |  |  | 43,074
Airplan’s accounts receivables |  |  |  |  |  | 183,223 |  |  |  |  |  | 5,653 |  |  |  |  |  | 188,876
Airplan’s provision impairment |  |  |  |  |  | 1,613 |  |  |  |  |  | 5,653 |  |  |  |  |  | 7,266
Total estimate |  | Ps. | 386 |  | Ps. | 1,737 |  | Ps. | 36 |  | Ps. | 11,938 |  | Ps. | 165,542 |  | Ps. | 179,639
|  |  |  |  |  |  |  |  |  |  |  |  |  | More |  | Total estimate
|  | Due to expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | than 365 |  | 12/31/2019
At December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mexico’s accounts receivables |  |  | — |  | Ps. | 1,012 |  | Ps. | 1,733 |  | Ps. | 126 |  | Ps. | 128,930 |  | Ps. | 131,801
Mexico’s provision impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 128,930 |  |  | 128,930
Aerostar’s account receivables |  | Ps. | 159,796 |  |  | 97,697 |  |  | 2,176 |  |  | 712 |  |  | 31,236 |  |  | 291,617
Aerostar’s provision impairment |  |  | 1,599 |  |  | 3,611 |  |  | 544 |  |  | 499 |  |  | 31,236 |  |  | 37,489
Airplan’s accounts receivables |  |  |  |  |  | 114,858 |  |  | 52,410 |  |  | 15,357 |  |  | 8,602 |  |  | 191,227
Airplan’s provision impairment |  |  |  |  |  | 953 |  |  | 435 |  |  | 15,357 |  |  | 8,602 |  |  | 25,347
Total estimate |  | Ps. | 1,599 |  | Ps. | 4,564 |  | Ps. | 979 |  | Ps. | 15,856 |  | Ps. | 168,768 |  | Ps. | 191,766

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