CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]
Net cash provided by/(used in) operating activities	$ 8,486	$ 9,951
Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract]
Capital spending	(3,688)	(3,264)
Acquisitions of finance receivables and operating leases	(32,273)	(27,379)
Collections of finance receivables and operating leases	25,980	21,636
Purchases of marketable and other securities	(11,725)	(16,931)
Sales and maturities of marketable and other securities	12,756	16,906
Settlements of derivatives	109	154
Other	(181)	16
Net cash provided by/(used in) investing activities	(9,022)	(8,862)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]
Cash dividends	(1,711)	(1,392)
Purchases of common stock	(89)	(131)
Net changes in short-term debt	(1,735)	72
Proceeds from issuance of long-term debt	28,135	20,467
Principal payments on long-term debt	(25,299)	(19,952)
Other	(93)	(102)
Net cash provided by/(used in) financing activities	(792)	(1,038)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(289)	267
Cash, cash equivalents, and restricted cash at January 1 (Note 7)	18,638	16,019
Cash, cash equivalents, and restricted cash at June 30 (Note 7)	16,828
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	$ (1,617)	$ 318