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Business Separation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Business Separation [Abstract]    
Business separation costs $ 3.0 [1] $ 0 [1]
[1] Charges are associated with our announced plan to separate into two independent public companies. See Note 3 for more detail on the business separation costs. These charges are included within "Business separation costs" on our condensed consolidated income statement. These costs were primarily related to professional fees associated with separation activities within the finance and legal functions.