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Valuation And Qualifying Accounts And Reserves (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2013
Jun. 30, 2012
Jun. 30, 2011
Valuation and Qualifying Accounts [Abstract]        
Balance at Beginning of Year $ 92 $ 87 $ 100 $ 97
Additions 8 35 13 9
Deductions (8) (39) (13) (12)
Other (5) (2) (8) 6
Balance at End of Year $ 87 $ 81 $ 92 $ 100