EMPLOYEE BENEFIT PLANS (Tables)

12 Months Ended

May 31, 2021

Employee Benefits And Share Based Compensation [Abstract]

Summary of Restricted Stock Based Award Activity

	Restricted Stock-Based Awards Outstanding
(in millions, except fair value)	Number of Shares			Weighted-Average Grant Date Fair Value
Balance, May 31, 2018		89		$	42.93
Granted		53		$	42.47
Vested and Issued		(31	)	$	41.85
Canceled		(12	)	$	42.97
Balance, May 31, 2019		99		$	43.01
Granted		50		$	53.38
Vested and Issued		(34	)	$	42.67
Canceled		(14	)	$	46.81
Balance, May 31, 2020		101		$	48.36
Granted		54		$	54.95
Vested and Issued		(34	)	$	46.88
Canceled		(11	)	$	50.40
Balance, May 31, 2021		110		$	51.87

Summary of Stock Option Activity

	Options Outstanding
(in millions, except exercise price)	Shares Under Stock Option			Weighted-Average Exercise Price
Balance, May 31, 2018		304		$	36.11
Granted		7		$	43.47
Exercised		(72	)	$	28.32
Canceled		(17	)	$	49.28
Balance, May 31, 2019		222		$	37.78
Granted		—		$	—
Exercised		(44	)	$	33.18
Canceled		(2	)	$	44.76
Balance, May 31, 2020		176		$	38.86
Granted		—		$	—
Exercised		(52	)	$	32.05
Canceled		(17	)	$	51.02
Balance, May 31, 2021		107		$	40.14

	Outstanding Stock Options (in millions)		Weighted-Average Exercise Price		Weighted-Average Remaining Contract Term (in years)		Aggregate Intrinsic Value(1) (in millions)
Vested		67	$	34.05		2.54	$	3,000
Expected to vest(2)		9	$	48.70		5.76		266
Total		76	$	35.76		2.91	$	3,266

⁽¹⁾ The aggregate intrinsic value was calculated based on the gross difference between our closing stock price on the last trading day of fiscal 2021 of $78.74 and the exercise prices for all “in-the-money” options outstanding, excluding tax effects.

⁽²⁾ The unrecognized compensation expense calculated under the fair value method for shares expected to vest (unvested shares net of expected forfeitures) as of May 31, 2021 was approximately $17 million and is expected to be recognized over a weighted-average period of 1.44 years. Approximately 31 million shares outstanding as of May 31, 2021 were not expected to vest.

Stock-Based Compensation Expense

	Year Ended May 31,
(in millions)	2021			2020			2019
Cloud services and license support	$	134		$	110		$	99
Hardware		11			11			10
Services		55			54			49
Sales and marketing		313			261			360
Research and development		1,188			1,035			963
General and administrative		136			119			172
Total stock-based compensation		1,837			1,590			1,653
Estimated income tax benefit included in provision for income taxes		(413	)		(343	)		(358	)
Total stock-based compensation, net of estimated income tax benefit	$	1,424		$	1,247		$	1,295