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Summary of significant accounting policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Flight equipment |
| Useful Life (a) |  | Residual Value (b)
Passenger aircraft | 25 years |  | 15 | %
Freighter aircraft | 35 years |  | 15 | %
Helicopters | 30 years |  | 20 | %
Engines | 20 years |  | 60 | %
(a) Useful life may be determined to be a different period depending on the disposition strategy. (b) Estimated industry price, except where more relevant information indicates that a different residual value is more appropriate.

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- Definition Tabular disclosure of lessor's underlying asset for which right to use has been conveyed to lessee under operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123405975&loc=d3e41551-112718 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919398-209981 + Details
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