Goodwill And Other Intangibles (Schedule Of Goodwill Activity) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Other Intangibles [Abstract]
Goodwill, Beginning Balance			$ 7,024	$ 9,674
Goodwill impairment	$ (641)	$ (2,078)	(641)	(2,748)
CTF Acquistion adjustment				98
Goodwill, Ending Balance	$ 6,383	$ 7,024	$ 6,383	$ 7,024

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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