Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Feb. 28, 2021	May 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 8,856	$ 4,881
Receivables, less allowances of $697 and $390	11,481	10,102
Spare parts, supplies and fuel, less allowances of $345 and $335	583	572
Prepaid expenses and other	790	828
Total current assets	21,710	16,383
PROPERTY AND EQUIPMENT, AT COST	68,703	65,024
Less accumulated depreciation and amortization	33,713	31,416
Net property and equipment	34,990	33,608
OTHER LONG-TERM ASSETS
Operating lease right-of-use assets, net	14,964	13,917
Goodwill	6,977	6,372
Other assets	4,152	3,257
Total other long-term assets	26,093	23,546
ASSETS	82,793	73,537
CURRENT LIABILITIES
Current portion of long-term debt	646	51
Accrued salaries and employee benefits	2,321	1,569
Accounts payable	3,990	3,269
Operating lease liabilities	2,133	1,923
Accrued expenses	4,476	3,532
Total current liabilities	13,566	10,344
LONG-TERM DEBT, LESS CURRENT PORTION	22,797	21,952
OTHER LONG-TERM LIABILITIES
Deferred income taxes	3,563	3,162
Pension, postretirement healthcare and other benefit obligations	4,773	5,019
Self-insurance accruals	2,314	2,104
Operating lease liabilities	12,990	12,195
Other liabilities	809	466
Total other long-term liabilities	24,449	22,946
COMMITMENTS AND CONTINGENCIES
COMMON STOCKHOLDERS' INVESTMENT
Common stock, $0.10 par value; 800 million shares authorized; 318 million shares issued as of February 28, 2021 and May 31, 2020	32	32
Additional paid-in capital	3,445	3,356
Retained earnings	27,924	25,216
Accumulated other comprehensive loss	(764)	(1,147)
Treasury stock, at cost	(8,656)	(9,162)
Total common stockholders’ investment	21,981	18,295
LIABILITIES AND COMMON STOCKHOLDERS' INVESTMENT	$ 82,793	$ 73,537