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Derivative and Other Financial Instruments - Fair Value Hedge Carrying Amounts (Details) - Derivatives in fair value hedges - Designated as Hedging Instrument - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Derivative [Line Items]    
Cumulative amount of fair value hedging adjustment included in the carrying about of the hedged assets $ 2 $ 1
Receivables, net    
Derivative [Line Items]    
Carrying amount of hedged assets 14 15
Accrued liabilities    
Derivative [Line Items]    
Accounts payable $ (95) $ (13)