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Share-Based Compensation (Schedule of All Stock Option Transactions Under the Plans) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
9 Months Ended
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Stock Options Outstanding at Beginning of Period 10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Stock Options Outstanding, Granted 1us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Stock Options Outstanding, Exercised (3)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Stock Options Outstanding, Canceled and forfeited 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
Stock Options Outstanding at End of Period 8us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Stock Options Outstanding, Exercisable at End of Period 5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted-Average Exercise Price [Roll Forward]  
Weighted-Average Exercise Price Per Common Share, Outstanding at Beginning of Period $ 39.16us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Weighted-Average Exercise Price Per Common Share, Granted $ 71.57us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Weighted-Average Exercise Price Per Common Share, Exercised $ 36.92us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Weighted-Average Exercise Price Per Common Share, Canceled and forfeited $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Weighted-Average Exercise Price Per Common Share, Outstanding at End of Period $ 45.46us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Weighted-Average Exercise Price Per Common Share, Exercisable at End of Period $ 36.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice