Current Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Outstanding checks in excess of bank account balances	$ 193	$ 219
Other Current Liabilities
Accrued income taxes	54	71
Interest payable	167	246
Production, property, and other taxes payable	276	216
Accrued employee benefits	140	210
Derivatives	460	384
Other	340	183
Total other current liabilities	$ 1,437	$ 1,310