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CAPITAL STOCK - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 03, 2022 | Aug. 06, 2020 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022 | Jan. 31, 2022 | Dec. 31, 2020
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Authorized amount of stock available for repurchase (up to) |  |  |  |  |  |  |  |  | $ 1,500.0
Sale of stock, option to purchase additional shares (in days) |  |  |  | 30 days |  |  |  |  |
Preferred stock, par value (USD per share) |  |  | $ 0.01 |  | $ 0.01 |  | $ 0.01 |  |
Preferred stock, redemption price (in dollars per share) |  |  | $ 25.00 |  | $ 25.00 |  |  |  |
Preferred stock |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Authorized amount of stock available for repurchase (up to) | $ 1,600.0 |  |  |  |  |  |  |  |
Shares repurchased (in shares) |  |  | 0 |  | 0 |  |  |  |
Stock repurchase program, number of shares authorized to be repurchased (in shares) | 63,500,000 |  |  |  |  |  |  |  |
Series F Preferred Stock |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, par value (USD per share) | $ 0.01 |  |  |  |  |  |  |  |
Stock repurchase program, number of shares authorized to be repurchased (in shares) | 28,800,000 |  |  |  |  |  |  |  |
Preferred stock dividend rate, percentage | 6.95% |  |  |  | 6.95% |  |  |  |
Series G Preferred Stock |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, par value (USD per share) | $ 0.01 |  |  |  |  |  |  |  |
Stock repurchase program, number of shares authorized to be repurchased (in shares) | 17,000,000 |  |  |  |  |  |  |  |
Preferred stock dividend rate, percentage | 6.50% |  |  |  | 6.50% |  |  |  |
Series I |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, par value (USD per share) | $ 0.01 |  |  |  |  |  |  |  |
Stock repurchase program, number of shares authorized to be repurchased (in shares) | 17,700,000 |  |  |  |  |  |  |  |
Preferred stock dividend rate, percentage | 6.75% |  |  |  | 6.75% |  |  |  |
Current Share Repurchase Program |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Authorized amount of stock available for repurchase (up to) |  |  |  |  |  |  |  | $ 1,500.0 |
Shares repurchased (in shares) |  |  | 0 | 0 | 0 | 0 |  |  |
At-the-market Sale Program |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Aggregate stock offering price (up to) |  | $ 1,500.0 |  |  |  |  |  |  |
Sale of stock, shares issued (in shares) |  |  |  | 8,300,000 | 25,300,000 | 8,400,000 |  |  |
Proceeds from sale of stock |  |  |  | $ 214.9 | $ 562.7 | $ 221.1 |  |  |
Public Offering |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Sale of stock, shares issued (in shares) |  |  |  | 25,000,000 |  |  |  |  |
Proceeds from sale of stock |  |  |  | $ 645.0 |  |  |  |  |
Public Offering Additional Share Purchase Option |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Sale of stock, shares issued (in shares) |  |  |  | 3,750,000 |  |  |  |  |
Proceeds from sale of stock |  |  |  | $ 96.8 |  |  |  |  |

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