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Subsequent Events (Details) (Subsequent event, Former Chairman, Chief Executive Officer and President, USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2013
Subsequent event | Former Chairman, Chief Executive Officer and President
   
Subsequent Events    
Severance-related charges $ 26.4 $ 26.4
Accelerated deferred compensation on termination 16.7 16.7
Severance payments and other costs $ 9.7 $ 9.7