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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ (10)	$ (22)	$ (10)	$ (22)
Other Nonoperating Income (Expense) | Financial Products | Foreign exchange contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(10)	23	(39)	16
Other Nonoperating Income (Expense) | Machinery, Energy & Transportation | Foreign exchange contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	7	(54)	13	(38)
Other Nonoperating Income (Expense) | Machinery, Energy & Transportation | Commodity contracts
Derivative
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ (7)	$ 9	$ 16	$ 0