Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Feb. 28, 2014	May 31, 2013
Current assets:
Cash	$ 114.7	$ 75.3
Accounts receivable, less allowances of $6.4 and $8.7, respectively	310.1	297.4
Inventories	506.8	453.7
Rotable spares and equipment on or available for short-term lease	116.7	129.2
Deposits, prepaids and other	67.3	60.1
Deferred tax assets	11.3	18.0
Total current assets	1,126.9	1,033.7
Property, plant and equipment, net of accumulated depreciation of $408.9 and $354.5, respectively	336.0	361.7
Other assets:
Goodwill	262.6	255.6
Intangible assets, net of accumulated amortization of $33.8 and $25.1, respectively	170.4	157.8
Equipment on long-term lease	68.4	64.7
Capitalized program development costs	113.4	124.9
Investment in joint ventures	30.6	31.8
Other	104.8	106.7
Total other assets	750.2	741.5
Total assets	2,213.1	2,136.9
Current liabilities:
Current maturities of long-term debt	87.8	86.4
Accounts payable	160.5	149.3
Accrued liabilities	142.3	153.3
Total current liabilities	390.6	389.0
Long-term debt, less current maturities	626.6	622.2
Deferred tax liabilities	143.2	138.2
Other liabilities and deferred income	64.6	68.0
Total noncurrent liabilities	834.4	828.4
Equity:
Preferred stock, $1.00 par value, authorized 250,000 shares; none issued
Common stock, $1.00 par value, authorized 100,000,000 shares; issued 44,680,804 and 44,691,437 shares at cost, respectively	44.7	44.7
Capital surplus	433.8	431.6
Retained earnings	631.8	584.9
Treasury stock, 5,112,254 and 5,309,252 shares at cost, respectively	(98.1)	(100.1)
Accumulated other comprehensive loss	(25.2)	(42.5)
Total AAR stockholders' equity	987.0	918.6
Noncontrolling interest	1.1	0.9
Total equity	988.1	919.5
Total liabilities and equity	$ 2,213.1	$ 2,136.9