Goodwill And Other Intangibles (Amortized Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 1,457	$ 1,177
Accumulated Amortization	421	485
Net Carrying Amount	1,036	692
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Gross Cost	1,281	1,000
Accumulated Amortization	347	391
Net Carrying Amount	934	609
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Cost	176	177
Accumulated Amortization	74	94
Net Carrying Amount	$ 102	$ 83