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CAPITAL STOCK - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified | 1 Months Ended | 9 Months Ended | 83 Months Ended
--- | --- | --- | ---
Oct. 27, 2006 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 2006 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Term of repurchase program | 3 years |  |  |
Share repurchase program | $ 1,000,000,000 |  |  |
Repurchase of shares of common stock |  | 3.1 | 3.3 | 15.3
Aggregate cost of repurchase |  | 85,200,000 | 73,600,000 | 629,300,000
Number of shares repurchased under settlement of employee tax withholding obligations |  | 0.1 | 0.1 |
Shares repurchased aggregate value under settlement of employee tax withholding obligations |  | $ 2,800,000 | $ 3,300,000 |

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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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