Fair Value Measurements (Changes In Fair Value Of Level 3 Liabilities Representing Acquisition Related Contingent Consideration) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revaluation Impact		$ (8)	$ 18
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1,		241	309
Additions		34	8
Payments		(65)	(50)
Revaluation Impact		(8)	18
Other	[1]	1	(6)
Balance at June 30,		$ 203	$ 279

[1] (a) Primarily reflects the impact of foreign exchange.