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SHAREHOLDERS' EQUITY - Common shares (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |  |
Authorized share capital, common (in shares) | 800,000,000 |  |
Par value per share, common (in usd per share) | $ 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) | (92,994,000) |  |
Total treasury shares at end of year (in shares) | (92,621,000) | (92,994,000) |
Total shares outstanding (in shares) | 83,959,000 | 83,586,000 |
Common stocks |  |  |
Common Shares Issued and Outstanding [Roll Forward] |  |  |
Shares issued, balance at beginning of year (in shares) | 176,580,000 | 176,580,000 | 176,580,000
Shares issued (in shares) | 0 | 0 | 0
Total shares issued at end of year (in shares) | 176,580,000 | 176,580,000 | 176,580,000
Treasury Shares Issued and Outstanding [Roll Forward] |  |  |
Treasury shares, balance at beginning of year (in shares) | (92,994,000) | (93,419,000) | (90,139,000)
Shares repurchased (in shares) | (176,000) | (200,000) | (4,288,000)
Shares reissued from treasury (in shares) | 549,000 | 625,000 | 1,008,000
Total treasury shares at end of year (in shares) | (92,621,000) | (92,994,000) | (93,419,000)
Total shares outstanding (in shares) | 83,959,000 | 83,586,000 | 83,161,000

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