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Aircraft under management (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2020 aircraft	Dec. 31, 2019 USD ($) aircraft item	Dec. 31, 2018 USD ($) aircraft
Investments
Number of aircraft		83
Number of platforms | item		3
Total unfunded commitment | $		$ 30.5
Number of aircraft sold or agreed to be sold			6
Financial Institution
Investments
Number of aircraft		5
Blackbird
Investments
Number of aircraft		26
Number of platforms | item		2
Cost Method Investments | $		$ 46.5	$ 40.6
Blackbird I
Investments
Non-controlling interest (as a percent)		9.50%
Blackbird II
Investments
Total unfunded commitment | $		$ 1,300.0
Non-controlling interest (as a percent)		9.50%
Number of aircraft sold or agreed to be sold		2
Thunderbolt
Investments
Number of aircraft		52
Number of platforms | item		3
Number of aircraft sold or agreed to be sold		17
Cost Method Investments | $		$ 9.9	$ 5.4
Thunderbolt II
Investments
Non-controlling interest (as a percent)		5.00%
Thunderbolt III
Investments
Non-controlling interest (as a percent)		5.00%
Aircraft Held For Sale
Investments
Number of aircraft		8
Number of aircraft sold or agreed to be sold			6
Forecast | Aircraft Held For Sale
Investments
Number of aircraft sold or agreed to be sold	8

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117539-209714

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