Financial Instruments (Effects of Net Investment Hedges on Accumulated Other Comprehensive Losses) (Details) - Net Investment Hedging [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	$ 58	$ 69
Gain (Loss) Recognized in Net Earnings (Losses)	36	35
Foreign Currency Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	23	69
Gain (Loss) Recognized in Net Earnings (Losses)	36	35
Foreign Currency Denominated Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	35	0
Gain (Loss) Recognized in Net Earnings (Losses)	$ 0	$ 0