Working Capital Detail (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Disclosure Components Of Working Capital Detail [Abstract]
Trade - net	$ 2,559				$ 2,288
Equity affiliates	5				2
Other - net	339				364
Total	2,903	$ 3,155	$ 3,191	$ 3,013	2,654
Finished products	1,083				947
Work in process	177				165
Raw materials	437				370
Supplies	33				32
Total	1,730	1,805	1,766	1,699	1,514
Trade	2,321				1,907
Accrued payroll	441				443
Customer rebates	261				235
Other postretirement and pension benefits	78				124
Income taxes	100				94
Other	580				657
Total	$ 3,781	$ 3,900	$ 3,656	$ 3,517	$ 3,460