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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
6.375% Series D preferred stock |  |
Preferred stock, dividend rate (as a percent) | 6.375% | 6.375%
6.25% Series E preferred stock |  |
Preferred stock, dividend rate (as a percent) | 6.25% |
6.25% Series F preferred stock |  |
Preferred stock, dividend rate (as a percent) | 6.25% | 6.25%

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
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