Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013
Change in unrecognized tax benefits
Beginning balance	$ 55.0	$ 48.7
Additions for tax positions related to the current year	2.6	2.3
Additions for tax positions of prior years	0	0.9
Reductions for tax positions of prior years	(0.1)	0
Expiration of statute of limitations	0	(0.1)
Ending balance	$ 57.5	$ 51.8

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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