Intangible Assets And Goodwill (Amortized Intangible Assets, Excluding Goodwill, By Business Segment) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 983	$ 111
Accumulated Amortization	162	62
Products
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	178	89
Accumulated Amortization	63	60
Services
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	805	22
Accumulated Amortization	$ 99	$ 2