Basic and Diluted Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net loss
Net loss	$ (86.4)	$ (45.0)
Basic and diluted net loss per share:
Basic	$ (1.01)us-gaap_EarningsPerShareBasic	$ (0.53)us-gaap_EarningsPerShareBasic
Diluted	$ (1.01)us-gaap_EarningsPerShareDiluted	$ (0.53)us-gaap_EarningsPerShareDiluted
Weighted average number of shares used in per share calculations:
Basic shares	85.3	84.3
Diluted shares	85.3	84.3

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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