Segment and Geographic Area Information - Schedule of Segment Reporting Information to Consolidated Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Assets:
Total segment assets	$ 18,693	$ 18,718
Cash and cash equivalents	2,277	2,150
Corporate fixed assets, net	5,704	5,594
Total segment sales
Assets:
Total segment assets	15,369	15,321
Other
Assets:
Cash and cash equivalents	2,277	2,150
Deferred income taxes	573	743
Corporate fixed assets, net	305	310
Fair value of derivative contracts	37	91
Other	$ 132	$ 103