|
Income Taxes (Deferred tax liabilities and assets) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Income Tax Disclosure [Abstract] | ||
| Depreciation | $ 295.2 | $ 327.8 |
| Deferred revenue | 17.2 | 12.2 |
| Intangibles | 29.5 | 36.3 |
| Gain on debt redemption | 64.3 | 63.9 |
| Other | 54.7 | 54.7 |
| Deferred tax liabilities | 460.9 | 494.9 |
| Claims and insurance | (169.2) | (179.6) |
| Net operating loss carryforwards | (329.1) | (298.8) |
| Employee benefit accruals | (237.9) | (288.9) |
| Other | (176.7) | (173.6) |
| Deferred tax assets | (912.9) | (940.9) |
| Valuation allowance | 454.1 | 448.4 |
| Net deferred tax assets | (458.8) | (492.5) |
| Net deferred tax liability | $ 2.1 | $ 2.4 |