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Separation Costs (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Separation Costs [Abstract]      
Rebranding and marketing costs $ 0xyl_RebrandingAndMarketingCosts $ 0xyl_RebrandingAndMarketingCosts $ 8xyl_RebrandingAndMarketingCosts
Advisory and professional fees 0xyl_AdvisoryFeesAndOther 0xyl_AdvisoryFeesAndOther 7xyl_AdvisoryFeesAndOther
Information and technology costs 0xyl_InformationAndTechnologyCosts 2xyl_InformationAndTechnologyCosts 3xyl_InformationAndTechnologyCosts
Employee retention and hiring costs 0xyl_EmployeeRetentionAndHiringCosts 0xyl_EmployeeRetentionAndHiringCosts 1xyl_EmployeeRetentionAndHiringCosts
Lease termination and other real estate costs 0xyl_LeaseTerminationAndOtherRealEstateCosts 2xyl_LeaseTerminationAndOtherRealEstateCosts 1xyl_LeaseTerminationAndOtherRealEstateCosts
Other 0xyl_SeparationCostsOther 0xyl_SeparationCostsOther 2xyl_SeparationCostsOther
Total separation costs in operating income 0xyl_SeparationCosts 4xyl_SeparationCosts 22xyl_SeparationCosts
Tax-related separation cost 0xyl_TaxRelatedSeparationBenefitCosts 0xyl_TaxRelatedSeparationBenefitCosts 0xyl_TaxRelatedSeparationBenefitCosts
Income tax benefit 0xyl_IncomeTaxExpenseBenefitOnSeparationCost (2)xyl_IncomeTaxExpenseBenefitOnSeparationCost (6)xyl_IncomeTaxExpenseBenefitOnSeparationCost
Total separation costs, net of tax $ 0xyl_SeparationCostsNetOfTax $ 2xyl_SeparationCostsNetOfTax $ 16xyl_SeparationCostsNetOfTax