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FAIR VALUE MEASUREMENTS (Reconciliation of Beginning and Ending Balances of Liabilities Unobservable Inputs) (Details) - Contingent Consideration [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Total (gains)/losses included in earnings - realized/unrealized $ (11)  
Level 3 [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Balance 7 $ 3
Purchases, additions and issuances 19 6
Settlements (1) (2)
Ending Balance $ 14 $ 7