Derivative Financial Instruments and Risk Management Derivative Financial Instruments and Risk Management- Effect of Derivatives not designated as hedging instruments (Details) - Undesignated Derivatives - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ (59)	$ 8	$ 8	$ (2)
Other Nonoperating Income (Expense) | Financial Products | Foreign exchange contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(73)	15	12	(24)
Other Nonoperating Income (Expense) | Machinery, Energy & Transportation | Foreign exchange contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	8	(1)	21	12
Other Nonoperating Income (Expense) | Machinery, Energy & Transportation | Commodity contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ 6	$ (6)	$ (25)	$ 10