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STOCKHOLDERS' EQUITY: (Details 2) (USD $) | 1 Months Ended | 3 Months Ended | 5 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 35 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2011 | Jun. 30, 2011 | May 31, 2011 | Jun. 30, 2011 | Dec. 31, 2008 | Oct. 31, 2010 | Sep. 30, 2009 | Dec. 31, 2008 | Jun. 30, 2011 | Oct. 14, 2010 | Sep. 30, 2010
SCC share repurchase program: |  |  |  |  |  |  |  |  |  |  |
Amount authorized for share repurchase program |  |  |  |  |  |  |  | $ 500,000,000 |  |  |
Increased amount authorized for share repurchase program | 1,000,000,000 |  |  |  |  |  |  |  |  |  |
Total number of Shares Purchased |  | 4,567,520 | 14,400 | 4,581,920 | 28,510,150 | 15,600 | 4,912,000 |  | 38,019,670 |  |
Average Price Paid per Share (in dollars per share) |  | $ 32.30 | $ 37.06 | $ 32.32 | $ 13.49 | $ 29.69 | $ 14.64 |  | $ 15.92 |  |
Total Number of Shares Purchased as Part of Publicly Announced Plan |  | 38,019,670 | 33,452,150 | 38,019,670 | 28,510,150 |  |  | 28,510,150 | 38,019,670 | 33,437,750 | 33,422,150
Maximum Number of Shares that may yet be Purchased Under the Plan @ $32.87 |  | 5,929,726 |  | 5,929,726 |  |  |  |  | 5,929,726 |  |
Share purchase price under the plan (in dollars per share) |  | $ 32.87 |  | $ 32.87 |  |  |  |  | $ 32.87 |  |
Total cost |  | $ 147,500,000 | $ 500,000 | $ 148,000,000 | $ 384,700,000 | $ 500,000 | $ 71,900,000 |  | $ 605,100,000 |  |
Parent Company (Grupo Mexico) common shares |  |  |  |  |  |  |  |  |  |  |
Ownership interest held by parent company |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest held by parent company (as a percent) |  | 80.40% |  | 80.40% |  |  |  |  | 80.40% |  |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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