Number of aircraft leased under operating leases with original or remaining terms in excess of one year.

No definition available.

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- Definition

Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919359-209981

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- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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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

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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COMMITMENTS AND CONTINGENCIES - Operating Leases (Details) $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2018 USD ($) aircraft	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) aircraft	Sep. 30, 2017 USD ($)
Operating Leased Assets [Line Items]
Operating leases rental expense \| $	$ 49.6	$ 57.2	$ 99.7	$ 115.9
Term of leasing contract	180 months		180 months
Operating lease term renewal options	240 months		240 months
Number of leased aircraft	79		79
Aircraft
Operating Leased Assets [Line Items]
Operating leases rental expense \| $	$ 43.0	49.7	$ 87.1	101.4
VIH Aviation Group \| Leasing From Related Party
Operating Leased Assets [Line Items]
Related party transaction, expenses from transactions with related party \| $	$ 4.5	5.2	$ 9.5	9.7
VIH Aviation Group \| Leasing From Related Party \| S-92
Operating Leased Assets [Line Items]
Number of leased aircraft	6		6
VIH Aviation Group \| Leasing From Related Party \| AW139
Operating Leased Assets [Line Items]
Number of leased aircraft	1		1
VIH Helicopters USA, Inc \| Leasing From Related Party
Operating Leased Assets [Line Items]
Related party transaction, expenses from transactions with related party \| $	$ 0.1	$ 0.1	$ 0.1	$ 0.1
Six months ending March 31, 2019 to fiscal year 2020
Operating Leased Assets [Line Items]
Number of leased aircraft	36		36
Fiscal year 2021 to fiscal year 2023
Operating Leased Assets [Line Items]
Number of leased aircraft	32		32
Fiscal year 2024 to fiscal year 2025
Operating Leased Assets [Line Items]
Number of leased aircraft	11		11