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Benefit Plans (Carrying Value And Fair Market Value Of The Deferred Compensation Obligation for Company Stock Accounts) (Details) (Company Stock Accounts [Member], USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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Company Stock Accounts [Member]
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Carrying value of deferred compensation obligation | $ 7.3 | $ 8.3 |
| Fair market value of deferred compensation obligation | $ 9.5 | $ 11.6 |