CONSOLIDATED BALANCE SHEETS (PARENTHETICALS) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Preferred Stock, Non-voting, No Par Value	$ 0	$ 0
Preferred Stock, Shares Authorized	25.0	25.0
Preferred Stock, Shares Issued	0	0
Treasury Stock, Shares	7.5	7.5
Common Class A [Member]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	500.0	500.0
Common Stock, Shares, Issued	2.6	2.6
Common Stock, Shares, Outstanding	2.6	2.6
Common Class B [Member]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	500.0	500.0
Common Stock, Shares, Issued	167.9	167.2
Class A Exchangeable Shares [Member]
Exchangeable Stock, No Par Value	$ 0	$ 0
Exchangeable Stock, Shares Issued	2.9	2.9
Exchangeable Stock, Shares Outstanding	2.9	2.9
Class B Exchangeable Shares [Member]
Exchangeable Stock, No Par Value	$ 0	$ 0
Exchangeable Stock, Shares Issued	18.9	19.0
Exchangeable Stock, Shares Outstanding	18.9	19.0