v2.4.0.8
Short-Term and Long-Term Restricted Cash and Investments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jan. 02, 2014
Ice Clear U.S. [Member]
Restricted Cash and Cash Equivalents Items [Line Items]      
Contribution to guarantee fund $ 229 $ 161 $ 50