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STOCKHOLDERS' EQUITY - Additional Information (Details) $ / shares in Units, shares in Millions | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) $ / shares | Jun. 30, 2020 $ / shares | Mar. 31, 2020 USD ($) employee | Jun. 30, 2021 USD ($) $ / shares shares | Jun. 30, 2020 $ / shares | Oct. 31, 2020 USD ($) | Nov. 30, 2018 USD ($) | Feb. 28, 2018 USD ($) | Nov. 30, 2016 USD ($) | Jul. 31, 2012 USD ($)
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Number of employees affected | employee |  |  | 123 |  |  |  |  |  |  |
Cash dividends declared per common share (in dollars per share) | $ / shares | $ 0.28 | $ 0.245 |  | $ 0.525 | $ 0.465 |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  |  |  |  | $ 2,000,000,000.0
Stock repurchase program, additional authorized amount |  |  |  |  |  | $ 1,500,000,000 | $ 2,000,000,000.0 | $ 1,500,000,000 | $ 1,500,000,000 |
Purchases of treasury stock (in shares) | shares |  |  |  | 7.3 |  |  |  |  |  |
Stock repurchase program, liability | $ 35,000,000 |  |  | $ 35,000,000 |  |  |  |  |  |
Remaining value available under stock repurchase programs | $ 1,300,000,000 |  |  | $ 1,300,000,000 |  |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Incremental compensation cost |  |  | $ 8,000,000 |  |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  | 33.33% |  |  |  |  |  |

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