Changes in Stockholders' Equity and Temporary Equity (Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss, December 31, 2013	$ (510.7)
Other comprehensive (loss) gain before reclassifications	61.7
Net losses reclassified from accumulated other comprehensive loss	3.7
Other comprehensive income (loss), net of reclassification adjustments	65.4
Accumulated other comprehensive loss, June 30, 2014	(445.3)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss, December 31, 2013	(206.4)
Other comprehensive (loss) gain before reclassifications	0
Net losses reclassified from accumulated other comprehensive loss	3.7
Other comprehensive income (loss), net of reclassification adjustments	3.7
Accumulated other comprehensive loss, June 30, 2014	(202.7)
Deferred Gains on Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss, December 31, 2013	(0.2)
Other comprehensive (loss) gain before reclassifications	(0.1)
Net losses reclassified from accumulated other comprehensive loss	0
Other comprehensive income (loss), net of reclassification adjustments	(0.1)
Accumulated other comprehensive loss, June 30, 2014	(0.3)
Cumulative Translatoin Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive loss, December 31, 2013	(304.1)
Other comprehensive (loss) gain before reclassifications	61.8
Net losses reclassified from accumulated other comprehensive loss	0
Other comprehensive income (loss), net of reclassification adjustments	61.8
Accumulated other comprehensive loss, June 30, 2014	$ (242.3)

- 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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