Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets:
Deferred tax assets, employee benefits	$ 162.1	$ 144.3
Deferred tax assets, accounts receivable allowances	239.4	137.2
Deferred tax assets, tax credits and loss carryforwards	386.5	356.9
Deferred tax assets, intangible assets and goodwill	184.9myl_DeferredTaxAssetsIntangibleAssets	44.8myl_DeferredTaxAssetsIntangibleAssets
Deferred tax assets, convertible debt	62.4myl_DeferredTaxAssetsConvertibleDebt	51.5myl_DeferredTaxAssetsConvertibleDebt
Deferred tax assets, other	97.1us-gaap_DeferredTaxAssetsOther	129.3us-gaap_DeferredTaxAssetsOther
Total deferred tax assets, gross	1,132.4us-gaap_DeferredTaxAssetsGross	864.0us-gaap_DeferredTaxAssetsGross
Valuation allowance	(304.5)	(279.5)
Total deferred tax assets	827.9us-gaap_DeferredTaxAssetsNet	584.5us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Deferred tax liabilities, plant and equipment	156.1	137.0
Deferred tax liabilities, intangible assets	447.5	502.2
Deferred tax liabilities, financial instruments	0	89.1
Deferred tax liabilities, other	30.8us-gaap_DeferredTaxLiabilitiesOther	45.1us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	634.4us-gaap_DeferredIncomeTaxLiabilities	773.4us-gaap_DeferredIncomeTaxLiabilities
Deferred tax assets (liabilities), net	$ 193.5us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (188.9)us-gaap_DeferredTaxAssetsLiabilitiesNet

Deferred tax assets convertible debt.

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Amount of deferred tax liability attributable to taxable temporary differences.

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The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance.

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The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from employee benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the allowance for doubtful accounts.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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