Consolidated Statements of Cash Flows (Parentheticals 1) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statements of Cash Flows [Abstract]
Cash and cash equivalents per Consolidated Balance Sheets	$ 27,445	$ 32,927	$ 25,208	$ 23,239
Restricted cash included in Other assets per Consolidated Balance Sheets	363	336	286
Total cash, cash equivalents and restricted cash	$ 27,808	$ 33,263	$ 25,494	$ 23,239