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STOCK PROGRAMS - Stock Options (Details) - Stock Options
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 30, 2018
USD ($)
item
$ / shares
shares
Jun. 30, 2017
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
$ / shares
Shares      
Outstanding at the beginning of the year (in shares) | shares 12,964,300    
Grant at fair value (in shares) | shares 2,105,300    
Exercised (in shares) | shares (3,444,800)    
Expired (in shares) | shares (25,700)    
Forfeited (in shares) | shares (127,500)    
Outstanding at the end of the period (in shares) | shares 11,471,600 12,964,300  
Vested and expected to vest (in shares) | shares 11,390,400    
Exercisable (in shares) | shares 7,329,300    
Weighted-Average Exercise Price Per Share      
Outstanding at the beginning of the year (in dollars per share) $ 62.42    
Weighted-average grant date fair value (in dollars per share) 108.20    
Exercise price (in dollars per share) 53.08    
Expired (in dollars per share) 60.50    
Forfeited (in dollars per share) 93.47    
Outstanding at the end of the period (in dollars per share) 73.28 $ 62.42  
Vested and expected to vest Weighted-Average Exercise Price (in dollars per share) 73.07    
Exercisable Weighted-Average Exercise Price (in dollars per share) $ 60.05    
Additional General Disclosures      
Outstanding Aggregate Intrinsic Value (in dollars) | $ $ 796    
Weighted-Average Contractual Life Remaining 6 years 1 month 6 days    
Vested and expected to vest Aggregate Intrinsic Value (in dollars) | $ $ 793    
Vested and expected to vest Exercisable Weighted-Average Contractual Life Remaining 6 years 1 month 6 days    
Exercisable Aggregate Intrinsic Value (in dollars) | $ $ 606    
Exercisable Weighted-Average Contractual Life Remaining 4 years 9 months 18 days    
Maximum exercise period for all stock options from the date of grant 10 years    
Number of substantively equal tranches in which stock options grants become exercisable | item 3    
Service period over which stock option grants generally become exercisable in substantively equal tranches 4 years    
Per-share weighted-average grant date fair value of stock options granted      
Per-share weighted-average grant date fair value of stock options granted (in dollars per share) $ 27.76 $ 22.79 $ 21.51
Intrinsic value of stock options exercised (in dollars) | $ $ 246 $ 149 $ 75
Fair Value Of Option Grants, Assumptions and Methodology      
Method used for estimating fair value of option grant Black-Scholes    
Weighted-average expected stock-price volatility (as a percent) 26.00% 26.00% 27.00%
Weighted-average expected option life 7 years 7 years 7 years
Average risk-free interest rate (as a percent) 2.00% 1.50% 1.90%
Average dividend yield (as a percent) 1.50% 1.30% 1.20%