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Long-Term Obligations and Other Short-Term Borrowings (Other Financing Arrangements) (Details)
12 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Nov. 03, 2014
USD ($)
Sep. 30, 2014
USD ($)
Debt Instrument [Line Items]        
Commercial paper $ 0 $ 0    
Other obligations 330,000,000 312,000,000    
Committed Receivables Sales Facility Program        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity 700,000,000 950,000,000 $ 950,000,000 $ 700,000,000
Outstanding balance under the revolving credit facility 0 0    
Stand by letters of credit outstanding 40,000,000 41,000,000    
Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity 1,750,000,000.00 1,500,000,000.0    
Outstanding balance under the revolving credit facility 0 0    
Stand by letters of credit outstanding $ 14,000,000 0    
Revolving Credit Facility | Committed Receivables Sales Facility Program | Maximum        
Debt Instrument [Line Items]        
Leverage ratio 3.25      
Revolving Credit Facility | Committed Receivables Sales Facility Program | Minimum        
Debt Instrument [Line Items]        
Interest coverage ratio 4      
Commercial Paper        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity $ 1,500,000,000.0      
Short Term Credit Facilities        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity $ 699,000,000 $ 439,000,000