CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect of Accounting Change	Common Stock and Additional Paid in Capital	Common Stock and Additional Paid in Capital Cumulative Effect of Accounting Change	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative Effect of Accounting Change	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect of Accounting Change	Total Oracle Corporation Stockholders' Equity	Total Oracle Corporation Stockholders' Equity Cumulative Effect of Accounting Change	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect of Accounting Change
Balances at May. 31, 2018	$ 46,873	$ (110)	$ 28,950	$ 0	$ 19,111	$ (110)	$ (1,689)	$ 0	$ 46,372	$ (110)	$ 501	$ 0
Beginning common stock shares outstanding at May. 31, 2018			3,997.0
Common stock issued under stock-based compensation plans	2,033		$ 2,033		0		0		2,033		0
Common stock issued under stock-based compensation plans, Shares			103.0
Common stock issued under stock purchase plans	122		$ 122		0		0		122		0
Common stock issued under stock purchase plans, Shares			2.0
Assumption of stock-based compensation plan awards in connection with acquisitions	8		$ 8		0		0		8		0
Stock-based compensation	1,653		1,653		0		0		1,653		0
Repurchases of common stock	$ (36,000)		$ (5,354)		(30,646)		0		(36,000)		0
Repurchases of common stock, Shares	(733.8)		(734.0)
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	$ (503)		$ (503)		0		0		(503)		0
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards, Shares			(9.0)
Cash dividends declared	(2,932)		$ 0		(2,932)		0		(2,932)		0
Other, net	(71)		0		(2)		0		(2)		(69)
Other comprehensive income (loss), net	55		0		0		61		61		(6)
Net income	11,235		0		11,083		0		11,083		152
Balances at May. 31, 2019	22,363		$ 26,909		(3,496)		(1,628)		21,785		578
Ending common stock shares outstanding at May. 31, 2019			3,359.0
Common stock issued under stock-based compensation plans	1,470		$ 1,470		0		0		1,470		0
Common stock issued under stock-based compensation plans, Shares			78.0
Common stock issued under stock purchase plans	118		$ 118		0		0		118		0
Common stock issued under stock purchase plans, Shares			2.0
Assumption of stock-based compensation plan awards in connection with acquisitions	0
Stock-based compensation	1,590		$ 1,590		0		0		1,590		0
Repurchases of common stock	$ (19,200)		$ (2,932)		(16,268)		0		(19,200)		0
Repurchases of common stock, Shares	(361.0)		(361.0)
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	$ (665)		$ (665)		0		0		(665)		0
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards, Shares			(11.0)
Cash dividends declared	(3,070)		$ 0		(3,070)		0		(3,070)		0
Other, net	(95)		(4)		3		0		(1)		(94)
Other comprehensive income (loss), net	(93)		0		0		(88)		(88)		(5)
Net income	10,299		0		10,135		0		10,135		164
Balances at May. 31, 2020	$ 12,717		$ 26,486		(12,696)		(1,716)		12,074		643
Ending common stock shares outstanding at May. 31, 2020	3,067.0		3,067.0
Common stock issued under stock-based compensation plans	$ 1,658		$ 1,658		0		0		1,658		0
Common stock issued under stock-based compensation plans, Shares			86.0
Common stock issued under stock purchase plans	128		$ 128		0		0		128		0
Common stock issued under stock purchase plans, Shares			2.0
Assumption of stock-based compensation plan awards in connection with acquisitions	0
Stock-based compensation	1,837		$ 1,837		0		0		1,837		0
Repurchases of common stock	$ (21,000)		$ (2,893)		(18,107)		0		(21,000)		0
Repurchases of common stock, Shares	(329.2)		(329.0)
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards	$ (666)		$ (666)		0		0		(666)		0
Shares repurchased for tax withholdings upon vesting of restricted stock-based awards, Shares			(12.0)
Cash dividends declared	(3,063)		$ 0		(3,063)		0		(3,063)		0
Other, net	(128)		(17)		0		0		(17)		(111)
Other comprehensive income (loss), net	543		0		0		541		541		2
Net income	13,926		0		13,746		0		13,746		180
Balances at May. 31, 2021	$ 5,952		$ 26,533		$ (20,120)		$ (1,175)		$ 5,238		$ 714
Ending common stock shares outstanding at May. 31, 2021	2,814.0		2,814.0