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STOCKHOLDERS' EQUITY - Schedule of Share Repurchase Activities (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Value of shares repurchased |  | $ 200.0 | $ 100.0 | $ 200.0
Common Stock |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares repurchased (in shares) |  | 0.4 | 0.2 | 0.4
Common Stock | Repurchase Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares repurchased (in shares) | 0.0 | 0.4 | 0.2 | 0.4
Average price per share (in dollars per share) | $ 0 | $ 477.44 | $ 521.83 | $ 477.44
Value of shares repurchased | $ 0.0 | $ 200.0 | $ 100.0 | $ 200.0

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