Current Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Outstanding checks in excess of bank account balances	$ 204	$ 262
Other Current Liabilities
Accrued income taxes	211	6
Interest payable	161	244
Production, property, and other taxes payable	249	239
Accrued employee benefits	207	355
Derivatives	233	175
Other	142	218
Total other current liabilities	$ 1,203	$ 1,237