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SHAREHOLDERS' EQUITY - Common shares (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Class of Stock [Line Items] |  |  |
Authorized share capital, common (in shares) | 800,000,000 | 800,000,000 |
Par value per share, common (in usd per share) | $ 0.0125 | $ 0.0125 |
Common Shares Issued and Outstanding [Roll Forward] |  |  |
Shares issued, balance at beginning of year (in shares) | 176,580,000 |  |
Total shares issued at end of year (in shares) | 176,580,000 | 176,580,000 |
Treasury Shares Issued and Outstanding [Roll Forward] |  |  |
Treasury shares, balance at beginning of year (in shares) | (90,139,000) |  |
Total treasury shares at end of year (in shares) | (93,419,000) | (90,139,000) |
Total shares outstanding (in shares) | 83,161,000 | 86,441,000 |
Cash dividends declared per common share (in usd per share) | $ 1.53 | $ 1.43 | $ 1.22
Common stocks |  |  |
Common Shares Issued and Outstanding [Roll Forward] |  |  |
Shares issued, balance at beginning of year (in shares) | 176,580,000 | 176,240,000 | 175,478,000
Shares issued (in shares) | 0 | 340,000 | 762,000
Total shares issued at end of year (in shares) | 176,580,000 | 176,580,000 | 176,240,000
Treasury Shares Issued and Outstanding [Roll Forward] |  |  |
Treasury shares, balance at beginning of year (in shares) | (90,139,000) | (80,174,000) | (76,052,000)
Shares repurchased (in shares) | (4,288,000) | (10,508,000) | (4,616,000)
Shares reissued from treasury (in shares) | 1,008,000 | 543,000 | 494,000
Total treasury shares at end of year (in shares) | (93,419,000) | (90,139,000) | (80,174,000)
Total shares outstanding (in shares) | 83,161,000 | 86,441,000 | 96,066,000

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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