Current Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Outstanding checks in excess of bank account balances	$ 230	$ 262
Other Current Liabilities
Accrued income taxes	55	6
Interest payable	245	244
Production, property, and other taxes payable	215	239
Accrued employee benefits	183	355
Other	236	393
Total other current liabilities	$ 934	$ 1,237