Class of Stock [Domain] Class of Stock [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 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] City Area Code City Area Code Common Stock Common Stock [Member] Amendment Flag Amendment Flag Entity Tax Identification Number Entity Tax Identification Number Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Pre-commencement Tender Offer Pre-commencement Tender Offer 7.950% Senior Notes due 2053 7.950% Senior Notes due 2053 [Member] 7.950% Senior Notes due 2053 7.300% Junior Subordinated Notes due 2065 7.300% Junior Subordinated Notes due 2065 [Member] 7.300% Junior Subordinated Notes due 2065 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 Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, Address Line One Entity Address, Address Line One Document Information [Line Items] Document Information [Line Items] Document Information [Table] Document Information [Table] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Written Communications Written Communications Entity Address, Address Line Two Entity Address, Address Line Two Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Document Period End Date Document Period End Date Document Type Document Type