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Restructuring and Other Additional Information (Details) (Contract Termination [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Mar. 31, 2014
Mar. 31, 2015
Contract Termination [Member]
     
Restructuring Cost and Reserve [Line Items]      
Business exit costs $ 6.5us-gaap_BusinessExitCosts1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember
$ 14.0us-gaap_BusinessExitCosts1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember
 
Asset impairment charges   3.0us-gaap_AssetImpairmentCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember
 
Restructuring and other charges, net of tax   11.1alb_RestructuringSettlementandImpairmentProvisionsnetoftax
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember
 
Business exit costs, net of tax 4.3alb_BusinessExitCostsNetOfTax
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember
   
Restructuring reserve, current     $ 12.5us-gaap_RestructuringReserveCurrent
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember