Fair Value Measurements (Changes In Fair Value Of Level 3 Liabilities Representing Acquisition Related Contingent Consideration) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revaluation Impact				$ 11	$ (8)
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period,		$ 161	$ 247	189	241
Additions		20	0	26	34
Payments		(1)	(53)	(41)	(65)
Revaluation Impact		6	8		(8)
Other	[1]	(1)	1	0	1
Balance at June 30,		$ 185	$ 203	$ 185	$ 203

[1] Primarily reflects the impact of foreign exchange.