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Estimated Fair Values of Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | --- | ---
Financial assets |  |  |  |  |  |
Cash and cash equivalents | $ 325.0 |  | $ 655.6 |  | $ 744.0 | $ 809.5
Receivables | 272.6 |  | 522.7 |  |  |
Non-current investments | 268.9 |  | 458.0 |  |  |
Financial liabilities |  |  |  |  |  |
Long-term loans | 1,938.6 |  | 2,321.2 |  |  |
Accounts payable and provisions | 445.0 |  | 734.0 |  |  |
Interest payable | 12.4 |  | 11.0 |  |  |
Short-term loans and current portion of long-term loans | 121.5 | [1] | 40.0 | [1] |  |
Other non-current liabilities | 10.9 |  | 13.9 |  |  |
Carrying (Reported) Amount, Fair Value Disclosure |  |  |  |  |  |
Financial assets |  |  |  |  |  |
Cash and cash equivalents | 325.0 |  | 655.6 |  |  |
Receivables | 146.7 |  | 314.5 |  |  |
Non-current investments | 268.9 | [2] | 458.0 | [2] |  |
Financial liabilities |  |  |  |  |  |
Long-term loans | 1,938.6 |  | 2,321.2 |  |  |
Accounts payable and provisions | 402.1 |  | 660.2 |  |  |
Interest payable | 12.4 |  | 11.0 |  |  |
Short-term loans and current portion of long-term loans | 121.5 |  | 40.0 |  |  |
Other non-current liabilities | 10.9 |  | 13.9 |  |  |
Fair value |  |  |  |  |  |
Financial assets |  |  |  |  |  |
Cash and cash equivalents | 325.0 |  | 655.6 |  |  |
Receivables | 146.7 |  | 314.5 |  |  |
Non-current investments | 269.7 | [2] | 464.6 | [2] |  |
Financial liabilities |  |  |  |  |  |
Long-term loans | 1,794.4 |  | 2,322.4 |  |  |
Accounts payable and provisions | 402.1 |  | 660.2 |  |  |
Interest payable | 12.4 |  | 11.0 |  |  |
Short-term loans and current portion of long-term loans | 121.5 |  | 40.0 |  |  |
Other non-current liabilities | $ 10.9 |  | $ 13.9 |  |  |
[1] | At December 31, 2012, the maturity of the loans was updated to reflect post year-end refinancing terms.
[2] | Fair value determined by using cost for Rand Refinery Limited and Far South East due to a market value not being readily available.

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3044-108585 + Details
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