Common Stock [Member] Class of Stock [Domain] Debt Instrument, Name [Domain] Credit Risk [Member] Entity Registrant Name Credit Spread Risk [Member] Credit Spread Risk Market Disruption and Geopolitical Risk [Member] Market Disruption and Geopolitical Risk Series K Cumulative Preferred Stock [Member] Series K Cumulative Preferred Stock Prepayment Risk [Member] Market Risk [Member] Market Risk Default Risk [Member] Default Risk Preferred Stock [Member] Liquidity Risk [Member] Liquidity Risk Series F Term Preferred [Member] Series F Term Preferred Credit Facility [Member] Credit Facility Series G Term Preferred [Member] Series G Term Preferred Series H Term Preferred [Member] Series H Term Preferred 2035 Notes [Member] 2035 Notes Economic Recessions Risk [Member] Economic Recessions Risk Downgrade Risk [Member] Downgrade Risk Series D Term Preferred [Member] Series D Term Preferred Document Period End Date Amendment Flag Series L Term Preferred [Member] Series L Term Preferred Series J Term Preferred [Member] Series J Term Preferred Current Fiscal Year End Date Series I Term Preferred [Member] Series I Term Preferred Document Type Structured Credit Related Risk [Member] Structured Credit Related Risk Entity Central Index Key