The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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Amount classified as accrued liabilities attributable to disposal group held for sale or disposed of.

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Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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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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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Aruba Disposition (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
Aruba Disposition (Details) - USD ($) $ in Millions	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Aruba Disposition (Textual)
Asset impairment loss		$ 56		$ 56	$ 0	$ 0
Tax benefit on disposition				(765)	$ (1,870)	(1,777)
Aruba Terminal [Member]
Aruba Disposition (Textual)
Asset impairment loss	$ 56
Aruba Terminal [Member] \| Refining [Member]
Aruba Disposition (Textual)
Asset impairment loss	$ 56
Aruba Refinery [Member]
Aruba Disposition (Textual)
Asset retirement obligation recognized			$ 59
Asset retirement obligation charged to expense			59
Liabilities recognized for obligations under certain contracts			$ 4
Aruba refinery operating revenues						0
Aruba refinery loss before income taxes						$ 64
Aruba Disposition [Member] \| Refining [Member]
Aruba Disposition (Textual)
Tax benefit on disposition				$ 42