The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.8,17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DepositAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Jun. 02, 2014	Mar. 31, 2015	Dec. 31, 2014
Koko' oha Investments, Inc. [Member]
Business Acquisition [Line Items]
Deposit against purchase price		$ 15	$ 10
Koko' oha Investments, Inc. [Member] \| Mid Pac Petroleum, LLC [Member]
Business Acquisition [Line Items]
Outstanding membership interests of Mid Pac Petroleum, LLC	100.00%