(Schedule of Notional Amounts of Financial Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	[1]	$ 313	$ 407
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, notional amount		0	700
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, notional amount		0	475
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount		0	7
Not Designated as Hedging Instrument [Member] | Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, notional amount		$ 7	$ 16

[1] These contracts had maturities of two years or less as of December 31, 2020.