Equity Interest Pledged

Name:	bgc_EquityInterestPledged
Namespace Prefix:	bgc
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ Details

Name:	bgc_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	bgc
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility Fixed Charged Coverage Ratio

+ Details

Name:	bgc_LineOfCreditFacilityFixedChargedCoverageRatio
Namespace Prefix:	bgc
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Line Of Credit Facility Term Period

+ Details

Name:	bgc_LineOfCreditFacilityTermPeriod
Namespace Prefix:	bgc
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Portion Of Credit Facility Desingated For Foreign Currency Tranche

+ Details

Name:	bgc_PortionOfCreditFacilityDesingatedForForeignCurrencyTranche
Namespace Prefix:	bgc
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Threshold For Line Of Credit Borrowing Capacity

+ Details

Name:	bgc_ThresholdForLineOfCreditBorrowingCapacity
Namespace Prefix:	bgc
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Threshold For Line Of Credit Faciltiy, Percentage Of Asset Based Revolving Credit Facililties

+ Details

Name:	bgc_ThresholdForLineOfCreditFaciltiyPercentageOfAssetBasedRevolvingCreditFacililties
Namespace Prefix:	bgc
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 22
-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate
Namespace Prefix:	us-gaap
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase for additional borrowings on the credit facility during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph f
-Article 4

+ Details

Name:	us-gaap_LineOfCreditFacilityIncreaseAdditionalBorrowings
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent Events (Details) In Millions, unless otherwise specified	6 Months Ended	0 Months Ended
	Jul. 01, 2011	Jul. 21, 2011 CANADA New Credit Facilty [Member] CAD	Jul. 21, 2011 Minimum [Member] New Credit Facilty [Member] USD ($)	Jul. 21, 2011 Maximum [Member] New Credit Facilty [Member]	Jul. 21, 2011 New Credit Facilty [Member] USD ($)	Jul. 01, 2011 Amended Credit Facility [Member] USD ($)
Asset-based revolving credit facility borrowing capacity					$ 400.0	$ 400.0
Equity interest pledged in foreign subsidiaries, percentage					65.00%
Potential increase to credit facility borrowings					100
Portion of credit facility designated for foreign currency tranche		40
Ratio of minimum fixed charged coverage					1
Threshold for line of credit facility borrowings			$ 40.0
Threshold for line of credit facility, percentage of asset-based credit facility borrowings					10.00%
Credit facility term date	July 2012
Credit facility term period, years	5
Line of credit facility commitment fee, percentage			0.375%	0.50%