XML 63 R48.htm IDEA: XBRL DOCUMENT v3.3.1.900
Property And Equipment (Schedule Of Property And Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment $ 12,719.4 $ 14,975.5
Drilling rigs and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 11,001.8 13,253.2
Other [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 180.0 135.0
Work in progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 1,537.6 $ 1,587.3