Acquisitions (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Apr. 30, 2010	Dec. 31, 2011 Material_Acquisition	Dec. 31, 2010	Aug. 30, 2010 Vessels	Apr. 28, 2010
Business Acquisition [Line Items]
Goodwill		$ 5,956	$ 5,869
Acquisitions (Textual) [Abstract]
Percentage of outstanding common stock acquired of BJ Services					100.00%
Acquisition of outstanding common stock in consideration of cash and stock transaction					6,897
Revenues of BJ Services included in statement of operations			3,686
Net income of BJ Services included in statement of income			290
Agreement value to sell package of assets				55
Total amount of cash paid for acquisition					793
Total amount of shares issued for acquisition	118
Total valuation of shares issued based upon the closing price of common stock					6,048
BJ Stock options exchanged at fair value					56
Adjustment related to property, plant and equipment					406
Weighted average useful life of property, plant and equipment			P6Y
Number of leased vessels sold				2
Adjustment related to deferred taxes and other tax liabilities at fair value			1,262
Adjustment related to noncontrolling interests at fair value			202
Aggregate purchase price related to other acquisition, net of cash			208
Cash Acquired from Acquisition			4
Goodwill final acquisition accounting adjustments.			91
Number of material acquisitions		0
BJ Services [Member]
Business Acquisition [Line Items]
Goodwill					$ 4,406