v3.7.0.1
Fair Value Measurement (Schedule Of Acquisition-Related Contingent Consideration) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low $ 0  
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High 766  
Contingent consideration 132 $ 129
Acquisition Related Contingent Consideration [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Contingent consideration $ 157  
Acquisition Related Contingent Consideration [Member] | Level 3 [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Cost of debt 4.70%  
Acquisition-Related Contingent Consideration [Roll Forward]    
Balance at beginning of period $ (153)  
Change in fair value 4  
Balance at end of period $ (157)  
Acquisition Related Contingent Consideration [Member] | Minimum | Level 3 [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Weighted average cost of capital 10.00%  
Acquisition Related Contingent Consideration [Member] | Maximum | Level 3 [Member]    
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]    
Weighted average cost of capital 21.00%