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Summary of significant accounting policies - Flight equipment (Details) | 12 Months Ended
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Dec. 31, 2021
Passenger aircraft |
Property, Plant and Equipment [Line Items] |
Estimated useful life of asset, years | 25 years
Percentage of estimates for residual values of original manufacture cost | 15.00%
Freighter aircraft |
Property, Plant and Equipment [Line Items] |
Estimated useful life of asset, years | 35 years
Percentage of estimates for residual values of original manufacture cost | 15.00%
Helicopters |
Property, Plant and Equipment [Line Items] |
Estimated useful life of asset, years | 30 years
Percentage of estimates for residual values of original manufacture cost | 20.00%
Engines |
Property, Plant and Equipment [Line Items] |
Estimated useful life of asset, years | 20 years
Percentage of estimates for residual values of original manufacture cost | 60.00%

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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