Acquisitions / Dispositions (Allocation Of Acquisition Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Intangible asset useful life	10 years
Cash	$ 1,000	$ 575
Estimated fair value of deferred/contingent consideration	176	197	$ 39
Total consideration	1,200	772
Allocation of purchase price:
Goodwill	7,889	$ 7,241	$ 6,893
Current Fiscal Period Acquisitions
Business Acquisition [Line Items]
Cash	1,004
Estimated fair value of deferred/contingent consideration	176
Total consideration	1,180
Allocation of purchase price:
Cash and cash equivalents	52
Accounts receivable, net	39
Other current assets	5
Property, plant, and equipment	11
Other intangible assets	486
Goodwill	783
Other assets	3
Total assets acquired	1,379
Current liabilities	106
Other liabilities	93
Total liabilities assumed	199
Net assets acquired	$ 1,180