Financial Instruments (Effects of Net Investment Hedges on Accumulated Other Comprehensive Losses) (Details) - Net Investment Hedging [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	$ 257	$ 7	$ 238	$ 46
Gain Recognized in Net Earnings	10	10	26	26
Foreign currency contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	57	7	70	46
Gain Recognized in Net Earnings	10	10	26	26
Foreign Currency Denominated Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	200	0	168	0
Gain Recognized in Net Earnings	$ 0	$ 0	$ 0	$ 0