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Quarterly Operating Results (Unaudited) - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 28, 2014 | Jun. 29, 2014 | Mar. 30, 2014 | Dec. 31, 2013 | Sep. 29, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Severance and other restructuring costs | $ 22,000,000 us-gaap_RestructuringCharges | $ 9,200,000 us-gaap_RestructuringCharges | $ 38,200,000 us-gaap_RestructuringCharges | $ 1,400,000 us-gaap_RestructuringCharges | $ 5,400,000 us-gaap_RestructuringCharges | $ 5,900,000 us-gaap_RestructuringCharges | $ 7,700,000 us-gaap_RestructuringCharges | $ 800,000 us-gaap_RestructuringCharges | $ 70,827,000 us-gaap_RestructuringCharges | $ 14,900,000 us-gaap_RestructuringCharges |
Purchase accounting effects related to acquisitions |  |  | 7,400,000 bdc_PurchaseAccountingAdjustment |  |  |  |  | 6,600,000 bdc_PurchaseAccountingAdjustment |  |  |
Losses on the extinguishment of debt |  |  |  |  | $ 1,600,000 us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |  |  | $ 1,612,000 us-gaap_GainsLossesOnExtinguishmentOfDebt | $ 52,450,000 us-gaap_GainsLossesOnExtinguishmentOfDebt

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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