The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

Fair Value Measurements, Nonrecurring (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended					3 Months Ended		3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2011 Fair Value, Measurements, Nonrecurring [Member]	Mar. 31, 2012 Aruba Refinery [Member]	Jun. 30, 2012 Aruba Refinery [Member]	Mar. 31, 2012 Construction in Progress [Member]
Fair Value Measurements (Textual)
Long-lived assets, fair value								$ 350
Long-lived assets, carrying value	25,521		25,521		25,177			945	347
Assets, nonrecurring						0	0
Liabilities, nonrecurring						0	0
Asset impairment loss	$ 0	$ 0	$ 611	$ 0				$ 595		$ 16