SUPPLEMENTAL FINANCIAL INFORMATION Other Non-Current Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other Non-Current Assets [Abstract]
Equity investments	$ 3,144	$ 3,405
Inventories - other assets	1,262	1,373
Operating Lease, Right-of-Use Asset	724	704
Assets for Plan Benefits, Defined Benefit Plan	189	456
Restricted Cash, Noncurrent	342	390
Other Assets, Miscellaneous, Noncurrent	285	276
Other non-current assets	5,946	$ 6,604
Restricted Cash	$ 429