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Earnings Per Share (Schedule Of Calculation Of Basic And Diluted Earnings Per Share) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
12 Months Ended | |||||||||||||||||||||||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2011
Stock Options [Member]
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Dec. 31, 2010
Stock Options [Member]
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Dec. 31, 2009
Stock Options [Member]
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Dec. 31, 2010
Purchased Call Option [Member]
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Dec. 31, 2009
Purchased Call Option [Member]
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Dec. 31, 2011
Convertible Notes [Member]
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Dec. 31, 2009
Convertible Notes [Member]
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Jun. 30, 2011
Convertible Notes Exchange Offer [Member]
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Mar. 31, 2011
Convertible Notes Exchange Offer [Member]
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Dec. 31, 2010
Convertible Notes Exchange Offer [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||||||||||||||||||||||
| Income (Loss) from Continuing Operations Attributable to Parent | $ 134.6 | $ 288.2 | $ 285.8 | |||||||||||||||||||||
| Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | (9.4) | 4.6 | (0.3) | |||||||||||||||||||||
| Net Income | 125.2 | 292.8 | 285.5 | |||||||||||||||||||||
| Dividends and equivalents for share-based awards expected to be forfeited | (0.1) | (0.1) | (0.2) | |||||||||||||||||||||
| Net income for basic earnings per share | 125.3 | 292.9 | 285.7 | |||||||||||||||||||||
| Effect of Preferred Securities | 0 | [1] | 0 | [1] | 0 | [1] | ||||||||||||||||||
| Net income for diluted earnings per share | 125.3 | 292.9 | 285.7 | |||||||||||||||||||||
| Weighted-average shares outstanding | 290,500,000 | 279,300,000 | 277,700,000 | |||||||||||||||||||||
| Share-based payment awards classified as participating securities | 3,100,000 | 3,100,000 | 3,100,000 | |||||||||||||||||||||
| Denominator for basic earnings per share | 293,600,000 | 282,400,000 | 280,800,000 | |||||||||||||||||||||
| Dilutive securities | 2,400,000 | [2] | 2,500,000 | [2] | 1,100,000 | [2] | ||||||||||||||||||
| Convertible Notes | 200,000 | [3] | 13,100,000 | [3] | 9,000,000 | [3] | ||||||||||||||||||
| Warrants | 0 | [4] | 7,400,000 | [4] | 3,500,000 | [4] | ||||||||||||||||||
| Preferred Securities | 0 | [1] | 0 | [1] | 0 | [1] | ||||||||||||||||||
| Denominator for diluted earnings per share | 296,200,000 | 305,400,000 | 294,400,000 | |||||||||||||||||||||
| Income (Loss) from Continuing Operations, Per Basic Share | $ 0.46 | $ 1.02 | $ 1.02 | |||||||||||||||||||||
| Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share | $ (0.03) | $ 0.02 | $ 0.00 | |||||||||||||||||||||
| Basic earnings per share | $ 0.43 | $ 1.04 | $ 1.02 | |||||||||||||||||||||
| Income (Loss) from Continuing Operations, Per Diluted Share | $ 0.45 | $ 0.94 | $ 0.97 | |||||||||||||||||||||
| Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share | $ (0.03) | $ 0.02 | $ 0.00 | |||||||||||||||||||||
| Net income | $ 0.42 | $ 0.96 | $ 0.97 | |||||||||||||||||||||
| Preferred Securities Underlying Convertible Subordinated Debt Antidilutive Disclosure | 14.0 | |||||||||||||||||||||||
| Antidilutive securities excluded from computation of EPS | 8,300,000 | 12,000,000 | 12,400,000 | 13,200,000 | 13,100,000 | 9,000,000 | ||||||||||||||||||
| Conversion price of convertible note | $ 8.61 | $ 8.61 | ||||||||||||||||||||||
| Convertible notes outstanding | 0.1 | 17.5 | ||||||||||||||||||||||
| Principal amount of note | 345.0 | 0.2 | 20.0 | 324.7 | ||||||||||||||||||||
| Exercise price of warrants or rights | $ 11.59 | |||||||||||||||||||||||
| Undistributed Earnings Allocated to Participating Securities | $ 1.2 | $ 3.1 | $ 3.0 | |||||||||||||||||||||
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