Short-Term Debt (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Short term borrowings
Commercial Paper		$ 10,410	$ 8,252
Notes payable to banks and others with originating terms of one year or less		50	20
Current maturities of long-term debt		6,253	1,486
Current maturities of long-term capital leases		14	17
Redeemable long term obligations - Long-term debt		3,113	3,152
Redeemable long term obligations - Capital leases		0	0
Subtotal		19,840	12,927
Reclassified to long-term debt		(9,000)	(8,000)
Total short-term debt	[1]	$ 10,840	$ 4,927

[1] 2015 adjusted to conform to ASU 2015-03. Refer to Note 5, "New Accounting Standards" beginning on page FS-32.