Document Period End Date Entity Tax Identification Number Entity Address, Address Line Two Entity Address, Address Line Two Entity File Number Entity File Number Cover page. Cover [Abstract] Entities [Table] Entities [Table] 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 Entity Information [Line Items] Entity Information [Line Items] 6.75% Series B Mandatory Convertible Preferred Stock, par value $0.01 per share 6.75% Series B Mandatory Convertible Preferred Stock, par value $0.01 per share [Member] 6.75% Series B Mandatory Convertible Preferred Stock, par value $0.01 per share Written Communications Written Communications Trading Symbol Trading Symbol City Area Code City Area Code 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 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