XML 29 R30.htm IDEA: XBRL DOCUMENT v3.2.0.727
FAIR VALUE MEASUREMENTS. (Detail) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Fair value measurements    
Investments in sponsored funds $ 1,856.7 $ 1,884.0
Level 1 [Member]    
Fair value measurements    
Total 2,926.9 3,257.5
Level 1 [Member] | Fair value, measurements, recurring [Member]    
Fair value measurements    
Cash equivalents 1,043.7 1,345.8
Investments in sponsored funds 1,856.7 1,884.0
Investments held as trading 26.5 27.7
Level 2 [Member]    
Fair value measurements    
Total 55.9 52.2
Level 2 [Member] | Fair value, measurements, recurring [Member]    
Fair value measurements    
Cash equivalents 0.0 0.0
Investments in sponsored funds 0.0 0.0
Investments held as trading $ 55.9 $ 52.2