XML 27 R35.htm IDEA: XBRL DOCUMENT v3.2.0.727
Operating Segments - Narrative (Detail)
$ in Millions
Jun. 30, 2015
USD ($)
nonconsolidated_partner_company
Dec. 31, 2014
USD ($)
Segment Reporting Information [Line Items]    
Non-consolidated partner companies 28  
Other Items [Member]    
Segment Reporting Information [Line Items]    
Total assets included cash, cash equivalents, cash held in escrow, and marketable securities | $ $ 105.5 $ 156.5