Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013 Scenario, Adjustment
Net tax benefit from share-based transactions	$ 1.6	$ 4.3
Reclassified to other non-current liabilities	188.7	152.9	(7.6)
Reclassification from deferred income taxes, noncurrent	60.7	21.5	7.6
Unrecognized tax benefit, liability due to tax sharing agreement	$ 0

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount of an unrecognized tax benefit that is directly related to a position taken in a tax year that results in a net operating loss carryforward. This amount is presented as a reduction of the related deferred tax asset in the balance sheet if that deferred tax asset is not used. This amount is presented separately from the deferred tax asset for a net operating loss carryforward if this unrelated tax benefit is associated with a different tax position.

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