Restricted cash (Tables)

12 Months Ended

Dec. 31, 2012

Restricted cash includes:

(In US$ millions)	December 31, 2012		December 31, 2011

CIRR deposits (see Note below)		270		298
Margin calls related to share forward agreements		69		137
Restricted deposit related to loan facility		5		5
Tax withholding deposits		58		42
Total restricted cash		402		482
Long-term restricted cash (related to CIRR deposits and loan facility)		218		250
Short-term restricted cash		184		232

- Definition

Tabular disclosure of the cash and cash items which are restricted as to withdrawal or usage. The provisions of any restrictions are described in a note to the financial statements. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.

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