Information Relating to the Consolidated Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net increase in operating working capital was composed of the following:
(Increase) decrease in accounts and notes receivable	$ (2,121)	$ 3,631	$ 4,491
Decrease (increase) in inventories	603	85	(146)
Decrease (increase) in prepaid expenses and other current assets	439	713	(407)
Increase (decrease) in accounts payable and accrued liabilities	533	(5,769)	(3,737)
Decrease in income and other taxes payable	(4)	(639)	(741)
Net increase in operating working capital	(550)	(1,979)	(540)
Net cash provided by operating activities includes the following cash payments for interest on debt and for income taxes:
Interest on debt (net of capitalized interest)	158	0	0
Income taxes	1,935	4,645	10,562
Net sales (purchases) of marketable securities consisted of the following gross amounts:
Marketable securities purchased	(9)	(6)	(162)
Marketable securities sold	306	128	14
Net sales (purchases) of marketable securities	297	122	(148)
Net maturities of time deposits consisted of the following gross amounts:
Time deposits purchased	0	0	(317)
Time deposits matured	0	8	317
Net sales (purchases) of time deposits	0	8	0
Net (borrowing) repayment of loans by equity affiliates:
Borrowing of loans by equity affiliates	(2,341)	(223)	(176)
Repayment of loans by equity affiliates	307	6	316
Net (borrowing) repayment of loans by equity affiliates	(2,034)	(217)	140
Net sales (purchases) of other short-term investments:
Purchases of other short-term investments	(1)	(75)	(223)
Sales of other short-term investments	218	119	16
Net sales (purchases) of other short-term investments	217	44	(207)
Net borrowings (repayments) of short-term obligations consisted of the following gross and net amounts:
Proceeds from issuances of short-term obligations	14,778	13,805	9,070
Repayments of short-term obligations	(12,558)	(16,379)	(4,612)
Net borrowings (repayments) of short-term obligations with three months or less maturity	(90)	2,239	(1,027)
Net borrowings (repayments) of short-term obligations	2,130	(335)	3,431
Capital expenditures
Additions to properties, plant and equipment	17,742	28,213	34,393
Additions to investments	55	555	526
Current-year dry hole expenditures	313	736	504
Payments for other liabilities and assets, net	(1)	0	(16)
Capital expenditures	18,109	29,504	35,407
Expensed exploration expenditures	544	1,031	1,110
Assets acquired through capital lease obligations and other financing obligations	5	47	332
Capital and exploratory expenditures, excluding equity affiliates	18,658	30,582	36,849
Company's share of expenditures by equity affiliates	3,770	3,397	3,467
Capital and exploratory expenditures, including equity affiliates	$ 22,428	$ 33,979	$ 40,316