|
Income Taxes (Details 3) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
Dec. 31, 2008
|
|
| Changes in the deferred tax valuation allowance | ||||
| Additions charged to income | $ 21.0 | $ 23.6 | $ 27.3 | |
| Accounts written-off | (23.8) | (27.9) | (37.8) | |
| Other, net | 0.5 | (4.0) | (5.5) | |
| Valuation allowance, end of year | 118.1 | 120.1 | 126.5 | 156.4 |
|
Valuation allowance of deferred tax assets [Member]
|
||||
| Changes in the deferred tax valuation allowance | ||||
| Additions charged to income | 2.1 | 8.3 | 5.2 | |
| Acquisitions | (2.5) | |||
| Accounts written-off | (4.3) | (10.4) | (9.3) | |
|
Expirations of state net operating losses [Member]
|
||||
| Changes in the deferred tax valuation allowance | ||||
| Accounts written-off | $ 0.3 | $ 0.3 | $ 17.8 | |