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Cash and cash equivalents | 12 Months Ended
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Dec. 31, 2017
Cash And Cash Equivalents [Abstract] |
Cash and cash equivalents |
Strategic Report |  | Governance Report |  | Financial Statements |  | Production, Reserves and Operations |  | Additional Information
21 Cash and cash equivalents
|  |  |  |  | 2017 |  |  | 2016 |
| Note |  | US$m |  | US$m |
Cash at bank and in hand |  |  |  |  | 1,035 |  |  | 956 |
Money market funds and other cash equivalents |  |  |  |  | 9,515 |  |  | 7,245 |
Balance per Group balance sheet |  |  |  |  | 10,550 |  |  | 8,201 |
Bank overdrafts repayable on demand (unsecured) |  | 22 |  |  | (3 | ) |  | (12 | )
Balance per Group cash flow statement |  |  |  |  | 10,547 |  |  | 8,189 |
Cash and cash equivalents of US$290 million (2016: US$358 million) are held in countries where there are restrictions on remittances. Of this balance, US$158 million (2016: US$252 million) could be used to repay subsidiaries’ third-party borrowings. There are also restrictions on a further US$1,089 million (2016: US$1,051 million) of cash and cash equivalents, the majority of which is held by partially owned subsidiaries and is not available for use in the wider Group due to legal and contractual restrictions currently in place. Of this balance US$703 million (2016: US$766 million) could be used to repay subsidiaries’ third-party borrowings. 1

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- Definition The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_10_e&doctype=Standard -URIDate 2016-03-31 + Details
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