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Goodwill (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Transportation	Jun. 30, 2014 Facilities	Dec. 31, 2013 Facilities	Jun. 30, 2014 Supply and Logistics	Dec. 31, 2013 Supply and Logistics
Changes in goodwill
Balance at beginning of period	$ 2,503	$ 878	$ 1,162	$ 1,162	$ 463	$ 463
Foreign currency translation adjustments	(1)	(1)
Balance at end of period	2,502	877	1,162	1,162	463	463
Impairment	$ 0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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X

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

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+ References

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