Common Stock [Member] Common Stock [Member] Entity Tax Identification Number Entity Tax Identification Number Entity File Number Entity File Number Series Q Preferred Stock [Member] Series Q Preferred Stock [Member] Series Q Preferred Stock Series I Preferred Stock [Member] Series I Preferred Stock [Member] Series I Preferred Stock Cover [Abstract] Title of 12(b) Security Title of 12(b) Security Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Soliciting Material Soliciting Material Entity Address, Address Line One Entity Address, Address Line One Series T Cumulative Preferred Stock Series T Cumulative Preferred Stock [Member] Series T Cumulative Preferred Stock Series O Preferred Stock [Member] Series O Preferred Stock [Member] Series O Preferred Stock Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Entity Address, State or Province Entity Address, State or Province Series H Preferred Stock [Member] Series H Preferred Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Series G Preferred Stock [Member] Series G Preferred Stock [Member] Written Communications Written Communications Guarantee Notes Due 2030 [Member] Guarantee Notes Due 2030 [Member] Guarantee Notes Due 2030 Trading Symbol Trading Symbol Series K Preferred Stock [Member] Series K Preferred Stock [Member] Series K Preferred Stock Entity Addresses, Address Type [Axis] Entity Addresses, Address Type [Axis] City Area Code City Area Code Series R Preferred Stock [Member] Series R Preferred Stock [Member] Series R Preferred Stock Series M Preferred Stock [Member] Series M Preferred Stock [Member] Series M Preferred Stock Address Type [Domain] Address Type [Domain] Document Information [Table] Document Information [Table] Series U Cumulative Preferred Stock Series U Cumulative Preferred Stock [Member] Series U Cumulative Preferred Stock Series P Preferred Stock [Member] Series P Preferred Stock [Member] Series P Preferred Stock Guarantee Notes Due 2032 [Member] Guarantee Notes Due 2032 [Member] Guarantee Notes Due 2032 Document Period End Date Document Period End Date Amendment Flag Amendment Flag Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, City or Town Entity Address, City or Town Series J Preferred Stock [Member] Series J Preferred Stock [Member] Series J Preferred Stock Security Exchange Name Security Exchange Name Series S Preferred Stock [Member] Series S Preferred Stock [Member] Series S Preferred Stock Series N Preferred Stock [Member] Series N Preferred Stock [Member] Series N Preferred Stock Document Information [Line Items] Document Information [Line Items] Document Type Document Type Class of Stock [Axis] Class of Stock [Axis] Series F Preferred Stock [Member] Series F Preferred Stock [Member] Series L Preferred Stock [Member] Series L Preferred Stock [Member] Series L Preferred Stock Pre-commencement Tender Offer Pre-commencement Tender Offer Guarantee Notes Due 2034 Guarantee Notes Due 2034 [Member] Guarantee Notes Due 2034 Entity Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company