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Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets        
Amortization of Intangible Assets $ 47us-gaap_AmortizationOfIntangibleAssets $ 46us-gaap_AmortizationOfIntangibleAssets $ 92us-gaap_AmortizationOfIntangibleAssets $ 92us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 94us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths   94us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
Finite-Lived Intangible Assets, Amortization Expense, Year Two 176us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo   176us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
Finite-Lived Intangible Assets, Amortization Expense, Year Three 167us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree   167us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
Finite-Lived Intangible Assets, Amortization Expense, Year Four 124us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour   124us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 76us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive   $ 76us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Minimum        
Goodwill and Intangible Assets        
Finite-Lived Intangible Asset, Useful Life 1 year      
Maximum        
Goodwill and Intangible Assets        
Finite-Lived Intangible Asset, Useful Life 20 years