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STOCKHOLDERS' EQUITY - Authorized Preferred Shares (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 11, 2021 | Dec. 31, 2020
Preferred Stock |  |  |
Preferred stock, authorized (in shares) | 100,000,000 |  | 100,000,000
Preferred stock, par value (in dollars per share) | $ 25.00 |  | $ 25.00
Preferred stock, issued (in shares) | 2,050,000 |  | 2,000,000
Preferred stock, value, issued | $ 2,014,000,000 |  | $ 1,965,000,000
Series A Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, liquidation preference per share (in dollars per share) | $ 1,000 |  |
Preferred stock, issued (in shares) | 0 |  | 250,000
Preferred stock, value, issued | $ 0 |  | $ 247,000,000
Series B Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, liquidation preference per share (in dollars per share) | $ 1,000 |  |
Preferred stock, issued (in shares) | 300,000 |  | 300,000
Preferred stock, value, issued | $ 296,000,000 |  | $ 296,000,000
Series C Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, liquidation preference per share (in dollars per share) | $ 1,000 |  |
Preferred stock, issued (in shares) | 300,000 |  | 300,000
Preferred stock, value, issued | $ 297,000,000 |  | $ 297,000,000
Series D Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, liquidation preference per share (in dollars per share) | $ 1,000 |  |
Preferred stock, issued (in shares) | 300,000 |  | 300,000
Preferred stock, value, issued | $ 293,000,000 |  | $ 293,000,000
Liquidation preference per depository share (usd per share) | $ 25 |  |
Depositary shares issued (in shares) | 12,000,000 |  |
Depository share interest percentage | 2.50% |  |
Series E Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, liquidation preference per share (in dollars per share) | $ 1,000 |  |
Preferred stock, issued (in shares) | 450,000 |  | 450,000
Preferred stock, value, issued | $ 437,000,000 |  | $ 437,000,000
Liquidation preference per depository share (usd per share) | $ 25 |  |
Depositary shares issued (in shares) | 18,000,000 |  |
Depository share interest percentage | 2.50% |  |
Series F Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, liquidation preference per share (in dollars per share) | $ 1,000 |  |
Preferred stock, issued (in shares) | 400,000 |  | 400,000
Preferred stock, value, issued | $ 395,000,000 |  | $ 395,000,000
Series G Preferred Stock |  |  |
Preferred Stock |  |  |
Preferred stock, par value (in dollars per share) |  | $ 25.00 |
Preferred stock, liquidation preference per share (in dollars per share) |  | $ 1,000 |
Preferred stock, issued (in shares) | 300,000 |  | 0
Preferred stock, value, issued | $ 296,000,000 | $ 300,000,000 | $ 0

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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644 + Details
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