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Principles Of Consolidation (Fair Value Measurement) (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Millions, unless otherwise specified
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Dec. 31, 2013
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Dec. 31, 2012
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Level 1 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Restricted amounts held in escrow-current |
$ 90.1 |
$ 20.0 |
| Restricted amounts held in escrow-long term |
0.6 |
102.5 |
| Total assets at fair value |
90.7 |
122.5 |
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Level 2 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Restricted amounts held in escrow-current |
0 |
0 |
| Restricted amounts held in escrow-long term |
0 |
0 |
| Total assets at fair value |
0 |
0 |
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Level 3 [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Restricted amounts held in escrow-current |
0 |
0 |
| Restricted amounts held in escrow-long term |
0 |
0 |
| Total assets at fair value |
0 |
0 |
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Carrying (Reported) Amount, Fair Value Disclosure [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Restricted amounts held in escrow-current |
90.1 |
20.0 |
| Restricted amounts held in escrow-long term |
0.6 |
102.5 |
| Total assets at fair value |
$ 90.7 |
$ 122.5 |