XML 18 R70.htm IDEA: XBRL DOCUMENT v2.4.1.9
Retirement Benefits - Plan Asssets (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
US Plans [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets $ 786.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 $ 811.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 $ 756.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
Actual Allocation 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 42.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 40.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
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= us-gaap_FairValueInputsLevel3Member		 99.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_FairValueInputsLevel3Member
US Plans [Member] | Cash, cash equivalents and receivables [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 4.1us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 3.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Actual Allocation 1.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 0.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= us-gaap_CashAndCashEquivalentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
US Plans [Member] | Us Large Cap Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 12.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 16.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 12.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 16.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
US Plans [Member] | Us Large Cap Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 93.1us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_UsLargeCapEquityFundsMember
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= us-gaap_FairValueInputsLevel1Member		 132.1us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_FairValueInputsLevel1Member		  
US Plans [Member] | Us Small Mid Cap Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 5.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
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= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 7.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 7.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
US Plans [Member] | Us Small Mid Cap Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 40.2us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
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= us-gaap_FairValueInputsLevel1Member		 58.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_UsSmallMidCapEquityFundsMember
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= us-gaap_FairValueInputsLevel1Member		  
US Plans [Member] | International Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 9.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 14.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 14.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
US Plans [Member] | International Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 72.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_InternationalEquityFundsMember
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= us-gaap_FairValueInputsLevel1Member		 114.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_FairValueInputsLevel1Member		  
US Plans [Member] | Emerging Markets Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 2.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
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= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 4.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 2.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 4.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
US Plans [Member] | Emerging Markets Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 13.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_EmergingMarketsEquityFundsMember
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US Plans [Member] | Dynamic Asset Allocation [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 4.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= bco_DynamicAssetAllocationMember
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= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		 6.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= bco_DynamicAssetAllocationMember
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= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Target Allocation 4.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= bco_DynamicAssetAllocationMember
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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US Plans [Member] | Dynamic Asset Allocation [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 33.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | High Yield Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 2.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 2.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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US Plans [Member] | High Yield Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 15.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | Emerging Markets Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 2.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 2.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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US Plans [Member] | Emerging Markets Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 14.5us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | Long-duration 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 47.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 48.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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US Plans [Member] | Long-duration 1 [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 277.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | Long-duration 2 [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 95.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | Hedge fund of funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 5.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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US Plans [Member] | Hedge fund of funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 37.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | Core Property [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 6.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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US Plans [Member] | Core Property [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 45.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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US Plans [Member] | Structured Credit [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 5.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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US Plans [Member] | Structured Credit [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 42.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 179.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Actual Allocation 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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Target Allocation 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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Non-US Plans [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 177.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Cash, cash equivalents and receivables [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.1us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Equity Securities [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 105.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Us Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 31.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Canadian Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 39.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | European Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 8.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Asia Pacific Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Emerging Markets Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 3.5us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Other Non Us Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 20.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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Non-US Plans [Member] | Fixed-income securities [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 71.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Actual Allocation 40.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Target Allocation 35.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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= us-gaap_FixedIncomeFundsMember
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | High Yield Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Emerging Markets Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.2us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Global Credit Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 0.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Canadian Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 25.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | European Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 14.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_EuropeanFixedIncomeFundsMember
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= us-gaap_ForeignPensionPlansDefinedBenefitMember		 11.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EuropeanFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Long-duration 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 27.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_LongDurationFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 79.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_LongDurationFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Other Types Of Investments [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherTypesOfInvestmentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 17.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherTypesOfInvestmentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Actual Allocation 1.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherTypesOfInvestmentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 6.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherTypesOfInvestmentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Target Allocation 0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherTypesOfInvestmentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 6.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherTypesOfInvestmentsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Convertible securities [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_HedgeFundsEquityMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 12.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_HedgeFundsEquityMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Commodity Derivatives [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CommodityMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 4.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= us-gaap_CommodityMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
Non-US Plans [Member] | Other Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 1.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_OtherFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		 1.2us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_OtherFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember		  
UMWA Plans Postretirement Medical [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 264.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 284.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 268.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
Actual Allocation 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 100.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 14.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		   40.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
UMWA Plans Postretirement Medical [Member] | Us Large Cap Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 21.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 38.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 21.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 37.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | Us Large Cap Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 58.5us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 107.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsLargeCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
UMWA Plans Postretirement Medical [Member] | Us Small Mid Cap Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 10.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 10.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 9.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 9.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | Us Small Mid Cap Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 25.5us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 27.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_UsSmallMidCapEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
UMWA Plans Postretirement Medical [Member] | International Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 19.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 15.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 18.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 14.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | International Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 49.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 41.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_InternationalEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
UMWA Plans Postretirement Medical [Member] | Emerging Markets Equity Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 4.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 4.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 4.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 4.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | Emerging Markets Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 10.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsEquityFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		    
UMWA Plans Postretirement Medical [Member] | Dynamic Asset Allocation [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 8.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_DynamicAssetAllocationMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		    
Target Allocation 7.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_DynamicAssetAllocationMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		    
UMWA Plans Postretirement Medical [Member] | Dynamic Asset Allocation [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 20.0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_DynamicAssetAllocationMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		    
UMWA Plans Postretirement Medical [Member] | High Yield Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 4.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_HighYieldFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 8.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_HighYieldFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 4.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_HighYieldFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 8.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_HighYieldFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | High Yield Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 10.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_HighYieldFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 24.1us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_HighYieldFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
UMWA Plans Postretirement Medical [Member] | Emerging Markets Fixed Income Funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 4.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		    
Target Allocation 4.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		    
UMWA Plans Postretirement Medical [Member] | Emerging Markets Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 10.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 10.9us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_EmergingMarketsFixedIncomeFundsMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
UMWA Plans Postretirement Medical [Member] | Multi Asset Real Return [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 8.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_MultiAssetRealReturnMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 10.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_MultiAssetRealReturnMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 8.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_MultiAssetRealReturnMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 13.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_MultiAssetRealReturnMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | Multi Asset Real Return [Member] | Fair Value, Inputs, Level 1 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 21.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_MultiAssetRealReturnMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		 29.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= bco_MultiAssetRealReturnMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		  
UMWA Plans Postretirement Medical [Member] | Hedge fund of funds [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 6.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_HedgeFundsMultistrategyMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		 10.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_HedgeFundsMultistrategyMember
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 3.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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UMWA Plans Postretirement Medical [Member] | Hedge fund of funds [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 14.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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UMWA Plans Postretirement Medical [Member] | Core Property [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 11.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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UMWA Plans Postretirement Medical [Member] | Core Property [Member] | Fair Value, Inputs, Level 2 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 28.8us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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UMWA Plans Postretirement Medical [Member] | Structured Credit [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Actual Allocation 5.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
UMWA Plans Postretirement Medical [Member] | Structured Credit [Member] | Fair Value, Inputs, Level 3 [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 14.3us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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UMWA Plans Postretirement Medical [Member] | US Private Equity Funds      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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= bco_UmwaPlansPostretirementMedicalMember		  
Actual Allocation 0.00%us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Target Allocation 7.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= bco_UmwaPlansPostretirementMedicalMember		  
Black Lung And Other Plans Postretirement [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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Pension plan [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets 965.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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Retirement benefits other than pension [Member]      
Fair Value Of Retirement Plan Investments [Line Items]      
Fair Value of Plan Assets $ 264.6us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		 $ 284.4us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember		 $ 268.7us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
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