Acquisitions (Allocation Of Acquisition Costs) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Cash	$ 79	$ 236
Estimated fair value of deferred/contingent consideration	26	95
Total Consideration	105	331
Allocation of purchase price:
Goodwill	7,945	$ 7,381	$ 7,889	$ 7,241
Current Fiscal Period Acquisitions
Business Acquisition [Line Items]
Cash	79
Estimated fair value of deferred/contingent consideration	26
Total Consideration	105
Allocation of purchase price:
Cash and cash equivalents	2
Accounts receivable, net	1
Property, plant, and equipment	1
Other intangible assets	43
Goodwill	62
Total assets acquired	109
Current liabilities	2
Other liabilities	2
Total liabilities assumed	4
Net assets acquired	$ 105