Goodwill And Acquired Intangibles (Schedule Of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,386	$ 4,096
Accumulated Amortization	2,303	2,046
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,445	2,281
Accumulated Amortization	943	797
Product Know-How [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	522	503
Accumulated Amortization	298	271
Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	650	595
Accumulated Amortization	479	436
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	556	523
Accumulated Amortization	406	376
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	213	194
Accumulated Amortization	$ 177	$ 166