|
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 |