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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)
12 Months Ended
Jun. 30, 2020
USD ($)
instrument
Jun. 30, 2019
USD ($)
instrument
Jun. 30, 2018
USD ($)
instrument
Jun. 30, 2017
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Impairment $ 0      
Performance period for performance awards 3 years      
Minimum percentage for calculating the amortization of actuarial gains and losses under the corridor approach 5.00%      
Contract term one year or less      
Allowance for doubtful accounts $ 10,000,000 $ 4,000,000    
Nontrade receivables, current $ 20,000,000 $ 17,000,000    
Number of hedging instruments designated as fair value hedges | instrument 0 0 0  
Cumulative effect of accounting changes $ 908,000,000 $ 559,000,000 $ 726,000,000 $ 542,000,000
Minimum [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Estimated useful life 2 years      
Maximum [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Estimated useful life 30 years      
Retained Earnings [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of accounting changes $ 3,567,000,000 3,150,000,000 2,797,000,000 $ 2,440,000,000
Cumulative Effect, Period of Adoption, Adjustment [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of accounting changes   22,000,000 [1] (3,000,000) [2]  
Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of accounting changes   $ 22,000,000 [1] $ 36,000,000 [2]  
[1] As a result of adopting ASU No. 2016-02, “Leases (ASC 842),” on July 1, 2019, the Company recorded a cumulative effect of initially applying the newguidance as an adjustment to the fiscal year 2020 opening balance of Retained earnings. See Note 1 for more information.
[2] As a result of adopting ASU No. 2014-09, “Revenue from Contracts with Customers (ASC 606),” on July 1, 2018, the Company recorded a cumulativeeffect of initially applying the new guidance as an adjustment to the fiscal year 2019 opening balance of Retained earnings.