|
Significant Concentrations and Risks (Details Textual) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2014
|
Mar. 31, 2013
|
Dec. 31, 2013
|
|
| Related Party Transaction [Line Items] | |||
| Cash and pledged bank deposits | $ 442 | $ 273 | |
| Purchases | 125 | 127 | |
| Purchase, Percentage | 67.00% | 62.00% | |
| Purchase of heavy oil | 100.0 | ||
| Sale of heavy oil | 99.2 | ||
| Trading loss of heavy oil | 0.8 | ||
|
Largest three supplier [Member]
|
|||
| Related Party Transaction [Line Items] | |||
| Purchases | $ 148 | $ 170 | |
| Purchase, Percentage | 80.00% | 83.00% | |
| Number of supplier | 3 | 3 | |