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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ 8	$ 3	$ (2)	$ (19)
Other Nonoperating Income (Expense) | Financial Products | Foreign exchange contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	15	13	(24)	29
Other Nonoperating Income (Expense) | Machinery, Energy & Transportation | Foreign exchange contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(1)	(5)	12	(43)
Other Nonoperating Income (Expense) | Machinery, Energy & Transportation | Commodity contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ (6)	$ (5)	$ 10	$ (5)