Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Feb. 29, 2020	May 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 1,766	$ 2,319
Receivables, less allowances of $307 and $300	9,323	9,116
Spare parts, supplies and fuel, less allowances of $332 and $335	568	553
Prepaid expenses and other	884	1,098
Total current assets	12,541	13,086
PROPERTY AND EQUIPMENT, AT COST	64,305	59,511
Less accumulated depreciation and amortization	30,999	29,082
Net property and equipment	33,306	30,429
OTHER LONG-TERM ASSETS
Operating lease right-of-use assets, net	13,981
Goodwill	6,814	6,884
Other assets	3,372	4,004
Total other long-term assets	24,167	10,888
ASSETS	70,014	54,403
CURRENT LIABILITIES
Short-term borrowings	300
Current portion of long-term debt	35	964
Accrued salaries and employee benefits	1,472	1,741
Accounts payable	3,193	3,030
Operating lease liabilities	1,902
Accrued expenses	3,423	3,278
Total current liabilities	10,325	9,013
LONG-TERM DEBT, LESS CURRENT PORTION	18,973	16,617
OTHER LONG-TERM LIABILITIES
Deferred income taxes	3,101	2,821
Pension, postretirement healthcare and other benefit obligations	4,165	5,095
Self-insurance accruals	1,933	1,899
Operating lease liabilities	12,232
Deferred lease obligations		531
Other liabilities	454	670
Total other long-term liabilities	21,885	11,016
COMMITMENTS AND CONTINGENCIES
COMMON STOCKHOLDERS' INVESTMENT
Common stock, $0.10 par value; 800 million shares authorized; 318 million shares issued as of February 29, 2020 and May 31, 2019	32	32
Additional paid-in capital	3,324	3,231
Retained earnings	25,569	24,648
Accumulated other comprehensive loss	(887)	(865)
Treasury stock, at cost	(9,207)	(9,289)
Total common stockholders’ investment	18,831	17,757
LIABILITIES AND COMMON STOCKHOLDERS' INVESTMENT	$ 70,014	$ 54,403