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, 2014	Dec. 31, 2013	Jun. 30, 2012
Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Year	$ 92	$ 81	$ 87	$ 100
Additions	8	37	35	13
Deductions	(8)	(32)	(39)	(13)
Other	(5)	(5)	(2)	(8)
Balance at End of Year	$ 87	$ 81	$ 81	$ 92