New Accounting Guidance (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements
Prepaid expenses and other current assets	$ 1,607	$ 1,748	$ 1,765
Property, plant and equipment - net	12,842	13,548	13,574
Noncurrent deferred and refundable income taxes	1,372	1,362	1,439
Other assets	3,242	3,045	2,332
Accrued expenses	3,727	3,546	3,573
Other current liabilities	2,188	2,128	1,919
Machinery, Energy & Transportation	9,134	7,643	8,005
Other liabilities	4,311	4,294	3,756
Profit employed in the business	$ 34,477	30,662	$ 30,427
Accounting Standards Update 2016-02
New Accounting Pronouncements
Prepaid expenses and other current assets		(17)
Property, plant and equipment - net		(26)
Noncurrent deferred and refundable income taxes		(77)
Other assets		713
Accrued expenses		(27)
Other current liabilities		209
Machinery, Energy & Transportation		(362)
Other liabilities		538
Profit employed in the business		$ 235