Stockholders' Equity Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive (loss) income, beginning of period	$ (479.4)
Other comprehensive gain (loss) before reclassifications	(43.1)
Net losses reclassified from accumulated other comprehensive loss	11.8
Other comprehensive income (loss), net of reclassification adjustments	(31.3)
Accumulated other comprehensive (loss) income, end of period	(510.7)
Deferred Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive (loss) income, beginning of period	0.7
Other comprehensive gain (loss) before reclassifications	(1.4)
Net losses reclassified from accumulated other comprehensive loss	0.5
Other comprehensive income (loss), net of reclassification adjustments	(0.9)
Accumulated other comprehensive (loss) income, end of period	(0.2)
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive (loss) income, beginning of period	(262.9)
Other comprehensive gain (loss) before reclassifications	45.2
Net losses reclassified from accumulated other comprehensive loss	11.3
Other comprehensive income (loss), net of reclassification adjustments	56.5
Accumulated other comprehensive (loss) income, end of period	(206.4)
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated other comprehensive (loss) income, beginning of period	(217.2)
Other comprehensive gain (loss) before reclassifications	(86.9)
Net losses reclassified from accumulated other comprehensive loss	0
Other comprehensive income (loss), net of reclassification adjustments	(86.9)
Accumulated other comprehensive (loss) income, end of period	$ (304.1)

- 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.

+ References+ Details