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Flight Equipment held for sale (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2020 aircraft	Dec. 31, 2018 USD ($) aircraft	Dec. 31, 2019 USD ($)
Flight Equipment Held for Sale
Number of aircraft sold or agreed to be sold		6
Aircraft Held For Sale
Flight Equipment Held for Sale
Number of aircraft sold or agreed to be sold		6
Flight Equipment, Net | $		$ 241.6	$ 249.6
Aircraft Held For Sale | Forecast
Flight Equipment Held for Sale
Number of aircraft sold or agreed to be sold	8

X

- Definition

The net amount of long-lived, depreciable flight assets used in the entity's principle business operations, including owned aircraft and on capital lease, as well as capitalized improvements.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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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Period Type:	duration

X

- Definition

The number of aircraft sold by the entity during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
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Period Type:	duration

X

- Details

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Balance Type:
Period Type:

X

- Details

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