Goodwill And Other Intangibles (Components Of Other Intangibles) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,280	$ 3,120
Accumulated Amortization	(2,182)	(1,977)
Net Carrying Amount	2,098	1,143
Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,158	2,998
Accumulated Amortization	(2,182)	(1,977)
Net Carrying Amount	1,976	1,021
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	122	122
Net Carrying Amount	$ 122	$ 122