XML 111 R74.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurements (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Fair Value Disclosures [Abstract]                      
Proceeds from sale of available for-sale securities                 $ 24.7 $ 0 $ 0
Available-for-sale securities 18.6               18.6    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]                      
Other income, net 7.1 6.2 0.2 0 0.2 (0.1) 0.6 0.1 13.5 0.9 0.8
Accumulated Net Unrealized Investment Gain | Reclassification out of Accumulated Other Comprehensive Income
                      
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]                      
Other income, net                 $ 6.1