STOCKHOLDERS' EQUITY Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
	Sep. 14, 2017 $ / shares	Aug. 31, 2017 USD ($) Tranche $ / shares shares	Aug. 31, 2016 USD ($) $ / shares shares
Stock Repurchases [Abstract]
Amount available for future repurchases | $		$ 4,800
Repurchases of common stock (in shares)		10.2	49.3
Repurchased amount | $		$ 500	$ 2,000
Repurchased shares that were not settled (in shares)		0.5
Repurchased amount that was not settled | $		$ 23
Dividends on Common Stock [Abstract]
Dividends per share, declared and paid (in dollars per share) | $ / shares		$ 0.19	$ 0.15
Stock-Based Compensation Expense and Valuations of Stock Awards [Abstract]
Restricted stock-based awards granted (in shares)		34.0
Stock options granted (in shares)		77.0
Forfeitures and cancellations (in shares)		7.0
Service-based stock options [Member]
Stock-Based Compensation Expense and Valuations of Stock Awards [Abstract]
Stock options granted (in shares)		8.0
Expiration date		10 years
Performance-based stock options [Member]
Stock-Based Compensation Expense and Valuations of Stock Awards [Abstract]
Stock options granted (in shares)		69.0
Number of vesting tranches granted that potentially may vest | Tranche		7
Number of individual vesting tranches requiring attainment of both a performance and a market condition | Tranche		6
Award performance period		5 years
Expiration date		8 years
Award service period for performance-based metrics, minimum		3 years
Award service period for performance-based metrics, maximum		5 years
Award service period for market-based metric		3 years
Weighted Average Input Assumptions Used and Resulting Fair Values [Abstract]
Risk-free interest rate		2.14%
Expected life (in years)		7 years
Volatility		22.44%
Dividend yield		1.49%
Subsequent Event [Member]
Dividends on Common Stock [Abstract]
Dividends declared per share of outstanding common stock (in dollars per share) | $ / shares	$ 0.19
Dividend payable date	Oct. 25, 2017
Dividend record date	Oct. 11, 2017