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FINANCIAL INSTRUMENTS (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Feb. 28, 2019
Mar. 31, 2019
Dec. 31, 2018
Derivative [Line Items]      
Accumulated other comprehensive loss   $ (55) $ (59)
Cash Flow Hedging      
Derivative [Line Items]      
Accumulated other comprehensive loss   9 $ 9
Net amount of deferred gains and losses on cash flow hedges that is expected to be reclassified within the next 12 months   $ 3  
Fair Value Hedging | One-Month LIBOR | Minimum      
Derivative [Line Items]      
Floating rate   2.20%  
Fair Value Hedging | One-Month LIBOR | Maximum      
Derivative [Line Items]      
Floating rate   3.00%  
Treasury Lock | Cash Flow Hedging      
Derivative [Line Items]      
Notional amount $ 250    
Gain (loss) on derivatives $ (1)