Summary of Significant Accounting Policies (Tables)

12 Months Ended

May 31, 2017

Summary of Significant Accounting Policies

Schedule of goodwill by reportable segment

	Aviation Services			Expeditionary Services		Total
Balance as of May 31, 2015	$	73.8		$	49.7	$	123.5
Acquisition		—			1.3		1.3
Deferred tax adjustments		(6.5	)		—		(6.5	)
Foreign currency translation adjustments		(1.0	)		—		(1.0	)
Balance as of May 31, 2016		66.3			51.0		117.3
Foreign currency translation adjustments		(1.9	)		—		(1.9	)
Balance as of May 31, 2017	$	64.4		$	51.0	$	115.4

Schedule of intangible assets, other than goodwill

	May 31, 2017
	Gross		Accumulated Amortization			Net
Amortizable intangible assets:
Customer relationships	$	24.4	$	(11.6	)	$	12.8
Developed technology		8.8		(4.7	)		4.1
Lease agreements		22.5		(11.2	)		11.3
FAA certificates		5.6		(2.3	)		3.3
Trademarks		0.2		—			0.2
		61.5		(29.8	)		31.7
Unamortized intangible assets:
Trademarks		1.1		—			1.1
	$	62.6	$	(29.8	)	$	32.8

	May 31, 2016
	Gross		Accumulated Amortization			Net
Amortizable intangible assets:
Customer relationships	$	22.7	$	(10.5	)	$	12.2
Developed technology		11.4		(4.6	)		6.8
Lease agreements		21.5		(9.9	)		11.6
FAA certificates		5.2		(1.5	)		3.7
Trademarks		0.2		—			0.2
		61.0		(26.5	)		34.5
Unamortized intangible assets:
Trademarks		1.3		—			1.3
	$	62.3	$	(26.5	)	$	35.8

Summary of inventories

	May 31,
	2017		2016
Raw materials and parts	$	45.0	$	46.3
Work-in-process		25.8		23.4
Aircraft and engine parts, components and finished goods		393.1		366.6
Aircraft held for sale and related support parts		19.2		15.7
	$	483.1	$	452.0

Schedule of supplemental information on cash flow

	For the Year Ended May 31,
	2017		2016		2015
Interest paid	$	4.4	$	4.7	$	42.7
Income taxes paid		12.7		35.7		105.6
Income tax refunds and interest received		1.3		1.3		12.1