Common Stock Common Stock [Member] Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line Two Entity Address, Address Line Two Entity File Number Entity File Number Cover [Abstract] Cover [Abstract] Title of 12(b) Security Title of 12(b) Security Class of Stock [Domain] Class of Stock [Domain] Local Phone Number Local Phone Number Soliciting Material Soliciting Material Entity Address, Address Line One Entity Address, Address Line One 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 Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Written Communications Written Communications Entity Listings [Line Items] Entity Listings [Line Items] Exchange [Domain] Exchange [Domain] Trading Symbol Trading Symbol Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] 5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062 5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062 [Member] 5.875% Fixed-Rate Reset Junior Subordinated Debentures due 2062 City Area Code City Area Code Entity Listings [Table] Entity Listings [Table] Document Period End Date Document Period End Date Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, City or Town Entity Address, City or Town Amendment Flag Amendment Flag Security Exchange Name Security Exchange Name Class of Stock [Axis] Class of Stock [Axis] Document Type Document Type Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company