Goodwill And Other Intangibles (Components Of Other Intangibles) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,282	$ 3,120
Accumulated Amortization	(2,620)	(1,977)
Net Carrying Amount	2,662	1,143
Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,088	2,998
Accumulated Amortization	(2,604)	(1,977)
Net Carrying Amount	2,484	1,021
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	122	122
Net Carrying Amount	122	$ 122
Royalty Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	72
Accumulated Amortization	(16)
Net Carrying Amount	$ 56