Financial Instruments (Effects of Net Investment Hedges on Accumulated Other Comprehensive Losses) (Details) - Net Investment Hedging [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	$ (104)	$ (75)	$ 29	$ (19)
Gain (Loss) Recognized in Net Earnings	11	7	25	16
Foreign currency contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	(18)	(10)	38	13
Gain (Loss) Recognized in Net Earnings	11	7	25	16
Foreign currency denominated debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated Other Comprehensive Losses	(86)	(65)	(9)	(32)
Gain (Loss) Recognized in Net Earnings	$ 0	$ 0	$ 0	$ 0