XML 63 R43.htm IDEA: XBRL DOCUMENT v3.7.0.1
Supplemental Financial Information (Other Assets, Net) (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Supplemental Financial Information [Abstract]    
Deferred tax assets $ 67.6 $ 69.3
Deferred costs 32.5 35.7
Supplemental executive retirement plan assets 28.5 27.7
Prepaid taxes on intercompany transfers of property 0.0 33.0
Other 9.4 10.2
Other Assets, Net $ 138.0 $ 175.9