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