Current Liabilities - Summary of Other Current Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Outstanding checks in excess of bank account balances	$ 206	$ 180
Other Current Liabilities
Accrued income taxes	135	167
Interest payable	252	267
Production, property, and other taxes payable	334	309
Accrued employee benefits	229	319
Derivatives	175	89
Operating lease liabilities	249	0
Other	188	144
Total other current liabilities	$ 1,562	$ 1,295