Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income (loss)	$ 616	$ (16)
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation, depletion, and amortization	510	448
Loss Contingency for Macondo well incident	0	1,000
Other changes:
Receivables	(175)	(406)
Accounts payable	160	158
Inventories	(105)	(70)
Payment of Barracuda-Caratinga obligation	0	(219)
Other	(52)	(546)
Total cash flows from operating activities	954	349
Cash flows from investing activities:
Capital expenditures	(643)	(685)
Purchases of investment securities	(55)	(28)
Sales of investment securities	50	9
Other investing activities	(26)	53
Total cash flows from investing activities	(674)	(651)
Cash flows from financing activities:
Payments to reacquire common stock	(500)	(50)
Dividends to shareholders	(127)	(116)
Other financing activities	113	21
Total cash flows from financing activities	(514)	(145)
Effect of exchange rate changes on cash	1	(8)
(Decrease) in cash and equivalents	(233)	(455)
Cash and equivalents at beginning of period	2,356	2,484
Cash and equivalents at end of period	2,123	2,029
Cash payments (receipts) during the period for:
Interest	167	123
Income taxes	$ (25)	$ 137