Information Relating to the Consolidated Statement of Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Net decrease (increase) in operating working capital
(Increase) decrease in accounts and notes receivable	$ (858)	$ 296
Increase in inventories	(219)	(611)
Decrease in prepaid expenses and other current assets	23	775
Decrease in accounts payable and accrued liabilities	(699)	(1,894)
Decrease in income and other taxes payable	(338)	(591)
Net increase in operating working capital	(2,091)	(2,025)
Cash Payment for Interest on Debt and For Income Taxes
Interest on debt (net of capitalized interest)	50	0
Income taxes	1,297	3,404
Maturities of Time Deposits
Maturities of time deposits	0	8
Net maturities of time deposits	0	8
Net sales of marketable securities
Marketable securities purchased	(9)	0
Marketable securities sold	11	64
Net sales of marketable securities	2	64
Net borrowing of loans by equity affiliates
Borrowing of loans by equity affiliates	(171)	(96)
Repayment of loans by equity affiliates	13	0
Net borrowing of loans by equity affiliates	(158)	(96)
Net sales of other short-term investments
Purchases of other short-term investments	(3)	(46)
Sales of other short-term investments	158	117
Net sales of other short-term investments	155	71
Net (repayments) borrowings of short-term obligations
Repayments of short-term obligations	(5,175)	(8,116)
Proceeds from issuances of short-term obligations	8,494	5,468
Net borrowings of short-term obligations with three months or less maturity	(2,960)	728
Net borrowings (repayments) of short-term obligations	359	(1,920)
Capital expenditures
Additions to properties, plant and equipment	9,796	14,599
Additions to investments	27	275
Current year dry hole expenditures	211	371
Payments for other liabilities and assets, net	1	0
Capital expenditures	10,035	15,245
Expensed exploration expenditures	250	507
Assets acquired through capital lease obligations	4	29
Capital and exploratory expenditures, excluding equity affiliates	10,289	15,781
Company’s share of expenditures by equity affiliates	1,703	1,526
Capital and exploratory expenditures, including equity affiliates	$ 11,992	$ 17,307