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SHARE REPURCHASE PROGRAMS (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
December 2017 Program |  |  |
Accelerated Share Repurchases [Line Items] |  |  |
Common stock repurchases | $ 17.2 | $ 58.2 |
Common Stock | December 2017 Program |  |  |
Accelerated Share Repurchases [Line Items] |  |  |
Repurchased and retired shares (in shares) | 234,000 | 828,000 |
December 2017 Program |  |  |
Accelerated Share Repurchases [Line Items] |  |  |
Maximum number of share repurchases authorization (in shares) |  |  | 1,500,000.0

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