Soliciting Material Soliciting Material Written Communications Written Communications Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Amendment Flag Amendment Flag Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Security Exchange Name Security Exchange Name Entity Address, State or Province Entity Address, State or Province Entity Address, Address Line One Entity Address, Address Line One City Area Code City Area Code Cover [Abstract] Cover [Abstract] Document Period End Date Document Period End Date Pre-commencement Tender Offer Pre-commencement Tender Offer Class of Stock [Axis] Class of Stock [Axis] Entity Central Index Key Entity Central Index Key Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Tax Identification Number Entity Tax Identification Number Cover page. Statement [Line Items] Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol Statement [Table] Statement [Table] 6.10% Notes due October 1, 2041 [Member] Deferrable Notes [Member] Common Stock, par value $0.01 per share [Member] Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Title of 12(b) Security Title of 12(b) Security Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Address, City or Town Entity Address, City or Town Document Type Document Type Depositary Shares, Each Representing a 1/1,00th Interest in a Share of 6.000% Non-Cumulative Preferred Stock, Series G, par value $0.01 per share [Member] Noncumulative Preferred Stock [Member]