Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Feb. 28, 2015	May 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 3,478	$ 2,908
Receivables, less allowances of $184 and $164	5,584	5,460
Spare parts, supplies and fuel, less allowances of $197 and $212	488	463
Deferred income taxes	510	522
Prepaid expenses and other	422	330
Total current assets	10,482	9,683
PROPERTY AND EQUIPMENT, AT COST	42,652	40,691
Less accumulated depreciation and amortization	22,227	21,141
Net property and equipment	20,425	19,550
OTHER LONG-TERM ASSETS
GOODWILL	3,805	2,790
Other assets	1,396	1,047
Total other long-term assets	5,201	3,837
ASSETS	36,108	33,070
CURRENT LIABILITIES
Current portion of long-term debt		1
Accrued salaries and employee benefits	1,231	1,277
Accounts payable	2,050	1,971
Accrued expenses	1,962	2,063
Total current liabilities	5,243	5,312
LONG-TERM DEBT, LESS CURRENT PORTION	7,228	4,736
OTHER LONG-TERM LIABILITIES
Deferred income taxes	2,497	2,114
Pension, postretirement healthcare and other benefit obligations	2,962	3,484
Self-insurance accruals	1,092	1,038
Deferred lease obligations	694	758
Deferred gains, principally related to aircraft transactions	187	206
Other liabilities	193	145
Total other long-term liabilities	7,625	7,745
COMMITMENTS AND CONTINGENCIES
COMMON STOCKHOLDERS' INVESTMENT
Common stock, $0.10 par value; 800 million shares authorized; 318 million shares issued as of February 28, 2015 and May 31, 2014	32	32
Additional paid-in capital	2,739	2,643
Retained earnings	21,880	20,429
Accumulated other comprehensive loss	(3,909)	(3,694)
Treasury stock, at cost	(4,730)	(4,133)
Total common stockholders' investment	16,012	15,277
LIABILITIES AND STOCKHOLDERS' INVESTMENT	$ 36,108	$ 33,070