CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock and Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Oracle Corporation Stockholders' Equity	Noncontrolling Interests
Balances at May. 31, 2015	$ 49,098	$ 23,156	$ 26,503	$ (996)	$ 48,663	$ 435
Beginning common stock shares outstanding at May. 31, 2015	4,343.0
Common stock issued under stock-based compensation plans	$ 1,304	1,304	0	0	1,304	0
Common stock issued under stock-based compensation plans, Shares	60.0
Common stock issued under stock purchase plans	$ 121	121	0	0	121	0
Common stock issued under stock purchase plans, Shares	3.0
Assumption of stock-based compensation plan awards in connection with acquisitions	$ 1	1	0	0	1	0
Stock-based compensation	1,037	1,037	0	0	1,037	0
Repurchase of common stock	$ (10,439)	(1,464)	(8,975)	0	(10,439)	0
Repurchase of common stock, Shares	(271.9)
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	$ (89)	(89)	0	0	(89)	0
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards, Shares	(3.0)
Cash dividends declared	$ (2,541)	0	(2,541)	0	(2,541)	0
Tax benefit from stock plans	141	141	0	0	141	0
Other, net	19	10	0	0	10	9
Distributions to noncontrolling interests	(85)	0	0	0	0	(85)
Other comprehensive income (loss), net	206	0	0	180	180	26
Net income	9,017	0	8,901	0	8,901	116
Balances at May. 31, 2016	$ 47,790	24,217	23,888	(816)	47,289	501
Ending common stock shares outstanding at May. 31, 2016	4,131.0
Common stock issued under stock-based compensation plans	$ 2,063	2,063	0	0	2,063	0
Common stock issued under stock-based compensation plans, Shares	95.0
Common stock issued under stock purchase plans	$ 118	118	0	0	118	0
Common stock issued under stock purchase plans, Shares	3.0
Assumption of stock-based compensation plan awards in connection with acquisitions	$ 90	90	0	0	90	0
Stock-based compensation	1,350	1,350	0	0	1,350	0
Repurchase of common stock	$ (3,492)	(504)	(2,988)	0	(3,492)	0
Repurchase of common stock, Shares	(85.6)
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	$ (283)	(283)	0	0	(283)	0
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards, Shares	(6.0)
Cash dividends declared	$ (2,631)	0	(2,631)	0	(2,631)	0
Other, net	19	14	(6)	0	8	11
Distributions to noncontrolling interests	(258)	0	0	0	0	(258)
Other comprehensive income (loss), net	27	0	0	13	13	14
Net income	9,453	0	9,335	0	9,335	118
Balances at May. 31, 2017	$ 54,246	27,065	27,598	(803)	53,860	386
Ending common stock shares outstanding at May. 31, 2017	4,137.0
Common stock issued under stock-based compensation plans	$ 2,277	2,277	0	0	2,277	0
Common stock issued under stock-based compensation plans, Shares	105.0
Common stock issued under stock purchase plans	$ 125	125	0	0	125	0
Common stock issued under stock purchase plans, Shares	3.0
Assumption of stock-based compensation plan awards in connection with acquisitions	$ 3	3	0	0	3	0
Stock-based compensation	1,607	1,607	0	0	1,607	0
Repurchase of common stock	$ (11,503)	(1,632)	(9,871)	0	(11,503)	0
Repurchase of common stock, Shares	(238.0)
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	$ (506)	(506)	0	0	(506)	0
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards, Shares	(10.0)
Cash dividends declared	$ (3,140)	0	(3,140)	0	(3,140)	0
Other, net	22	11	0	0	11	11
Distributions to noncontrolling interests	(34)	0	0	0	0	(34)
Other comprehensive income (loss), net	(833)	0	0	(833)	(833)	0
Net income	3,960	0	3,825	0	3,825	135
Balances at May. 31, 2018	$ 46,224	$ 28,950	$ 18,412	$ (1,636)	$ 45,726	$ 498
Ending common stock shares outstanding at May. 31, 2018	3,997.0