Business Acquisition and Dispositions - Preliminary identifiable assets acquired and liabilities assumed (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 03, 2017
Liabilities
Goodwill	$ 20,396	$ 20,423	$ 19,654
Operating loss carryforwards	$ 1,591	$ 1,500
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
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities				30
All other assets				1,335
Liabilities
Accounts payable				(1,213)
Borrowings				(3,370)
Liabilities for pension and other postretirement benefits				(654)
All other liabilities				(1,670)
Total identifiable net assets				11,164
Noncontrolling interest associated with net assets acquired				(35)
Goodwill				13,669
Total purchase consideration				24,798
Deferred tax liabilities				83
Operating loss carryforwards				113
Tax deductible goodwill				$ 67