Information Relating to the Consolidated Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Net (increase) decrease in operating working capital
Decrease in accounts and notes receivable	$ 145	$ 504
Increase in inventories	(835)	(1,279)
(Increase) decrease in prepaid expenses and other current assets	(184)	505
Increase (decrease) in accounts payable and accrued liabilities	347	(1,535)
Decrease in income and other taxes payable	(214)	(710)
Net increase in operating working capital	(741)	(2,515)
Cash Payment for Interest on Debt and For Income Taxes
Income taxes	6,026	7,565
Net (purchases) sales of time deposits
Time deposits purchased	(308)	(1,608)
Time deposits matured	308	908
Net (purchases) sales of time deposits	0	(700)
Net sales of marketable securities
Marketable securities purchased	4	5
Marketable securities sold	4	7
Net sales of marketable securities	0	2
Capital expenditures
Additions to properties, plant and equipment	17,019	16,334
Additions to investments	221	472
Current year dry hole expenditures	251	18
Payments for other liabilities and assets, net	(16)	(59)
Capital expenditures	17,475	16,765
Expensed exploration expenditures	614	497
Assets acquired through capital lease obligations	10	2
Capital and exploratory expenditures, excluding equity affiliates	18,099	17,264
Company's share of expenditures by equity affiliates	1,517	1,070
Capital and exploratory expenditures, including equity affiliates	$ 19,616	$ 18,334