The amount for notes payable (written promise to pay), payable to related parties, which are due after one year (or one business cycle).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Name:	us-gaap_NotesPayableRelatedPartiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Oman Investment (Details Textual) (USD $) In Millions, unless otherwise specified			6 Months Ended
	Jun. 30, 2014 USG-Zawawi Drywall LLC [Member]	Jun. 30, 2014 Zawawi Gypsum LLC [Member]	Jun. 30, 2014 Zawawi Gypsum LLC and USG-Zawawi Drywall LLC [Member]	Dec. 31, 2013 Zawawi Gypsum LLC and USG-Zawawi Drywall LLC [Member] Co-venturer [Member]
Statement [Line Items]
Ownership percentage by parent in noncontrolling interest	50.00%	55.00%
Percentage of noncontrolling owners in VIE	50.00%
Notes payable to venture partner				$ 8
Noncontrolling Interest, Decrease from Deconsolidation			$ 24