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Derivative and Other Financial Instruments (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Objectives for using derivative instruments The Company’s objective in managing exposure to market risk is to limit the impact on earnings and cash flow.    
Net gain to be reclassified to earnings $ 35    
Gain, net of tax, expected to be reclassified to earnings 28    
Reclassification of anticipated transactions that were no longer considered probable 0 $ 0  
Foreign exchange      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) on foreign exchange contracts designated as fair value hedges $ 27 $ 1  
Minimum      
Derivative Instruments, Gain (Loss) [Line Items]      
Contracts outstanding, maturity 1 month    
Maximum      
Derivative Instruments, Gain (Loss) [Line Items]      
Contracts outstanding, maturity 23 months    
Cash Flow Hedging | Interest rate      
Derivative Instruments, Gain (Loss) [Line Items]      
Aggregate notional amount     $ 200
Derivative fixed rate     1.82%