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CAPITAL STOCK - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2018 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Jun. 30, 2019
Class of Stock [Line Items] |  |  |  |  |
Options exercised under incentive plans (in shares) |  |  |  | 11,300,000.0 |
Authorized amount of stock available for repurchase |  |  |  |  | $ 1,500,000,000
Shares repurchased (in shares) |  | 0 |  |  |
Preferred stock, par value (in dollars per share) |  | $ 0.01 |  | $ 0.01 |
Preferred stock, redemption price (in dollars per share) |  | $ 25.00 |  |  |
Public Offering |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Sale of stock, shares issued (in shares) |  | 75,000,000.0 |  |  |
Proceeds from sale of stock |  | $ 730,500,000 |  |  |
Public Offering, Additional Share Purchase Option |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Sale of stock, shares issued (in shares) |  | 11,300,000 |  |  |
Proceeds from sale of stock |  | $ 109,600,000 |  |  |
Option to purchase additional shares, period |  |  |  | 30 days |
At-the-market Sale Program |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Sale of stock, shares issued (in shares) |  | 0 | 48,000,000.0 |  |
Proceeds from sale of stock |  |  | $ 489,000,000.0 |  |
Aggregate stock offering price | $ 1,500,000,000 |  |  |  |

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