Business Acquisition and Disposition - Preliminary identifiable assets acquired and liabilities assumed (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Jul. 03, 2017	Dec. 31, 2016
Liabilities
Goodwill	$ 20,717	$ 19,927		$ 6,680
Operating loss carryforwards	$ 1,525	$ 1,376
GE Transaction Agreement
Assets
Cash and equivalents			$ 4,133
Current receivables			2,342
Inventories			1,712
Property, plant and equipment			4,514
Intangible assets			4,005
All other assets			1,335
Liabilities
Accounts payable			(1,213)
Borrowings			(3,370)
Deferred income taxes			(258)
Liabilities for pension and other postretirement benefits			(654)
All other liabilities			(1,676)
Total identifiable net assets			10,870
Noncontrolling interest associated with net assets acquired			(35)
Goodwill			13,963
Total purchase consideration			24,798
Deferred tax liabilities			500
Operating loss carryforwards			242
Tax deductible goodwill			$ 67