Comprehensive Income - Schedule of Components of Accumulated Other Comprehensive Income, Net of Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) Net of Tax [Roll Forward]
Balance at the beginning of the period	$ 74.2
Other comprehensive income (loss) before reclassifications	(60.4)
Amounts reclassified from other comprehensive income	2.1
Net other comprehensive income (loss)	(58.3)
Balance at the end of the period	15.9
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) Net of Tax [Roll Forward]
Balance at the beginning of the period	56.6
Other comprehensive income (loss) before reclassifications	(62.0)
Amounts reclassified from other comprehensive income	0
Net other comprehensive income (loss)	(62.0)
Balance at the end of the period	(5.4)
Realized and Unrealized Losses on Derivative Securities
Accumulated Other Comprehensive Income (Loss) Net of Tax [Roll Forward]
Balance at the beginning of the period	(1.9)
Other comprehensive income (loss) before reclassifications	0.3
Amounts reclassified from other comprehensive income	0
Net other comprehensive income (loss)	0.3
Balance at the end of the period	(1.6)
Unrealized Gain (Loss) on Investment Securities
Accumulated Other Comprehensive Income (Loss) Net of Tax [Roll Forward]
Balance at the beginning of the period	19.5
Other comprehensive income (loss) before reclassifications	1.3
Amounts reclassified from other comprehensive income	2.1
Net other comprehensive income (loss)	3.4
Balance at the end of the period	$ 22.9

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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