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 Five Point Five Percent Guaranteed Notes Due 2035 Five Point Five Percent Guaranteed Notes Due 2035 [Member] Five Point Five Percent Guaranteed Notes Due 2035 Five Point Four Percent Guaranteed Notes Due 2034 Five Point Four Percent Guaranteed Notes Due 2034 [Member] Five Point Four Percent Guaranteed Notes Due 2034 Cover [Abstract] Title of 12(b) Security Title of 12(b) Security Five Point Zero Percent Guaranteed Notes Due 2036 Five Point Zero Percent Guaranteed Notes Due 2036 [Member] Five Point Zero Percent Guaranteed Notes Due 2036 Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Five Point One Two Five Percent Guaranteed Notes Due 2030 Five Point One Two Five Percent Guaranteed Notes Due 2030 [Member] Five Point One Two Five Percent Guaranteed Notes Due 2030 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 Incorporation, State or Country Code Entity Incorporation, State or Country Code Written Communications Written Communications Trading Symbol Trading Symbol Four Point Four Percent Guaranteed Notes Due 2031 Four Point Four Percent Guaranteed Notes Due 2031 [Member] Four Point Four Percent Guaranteed Notes Due 2031 Six Point Four Percent Notes Due 2033 Six Point Four Percent Notes Due 2033 [Member] Six Point Four Percent Notes Due 2033 Five Point Eight Seven Five Percent Guaranteed Notes Due 2055 Five Point Eight Seven Five Percent Guaranteed Notes Due 2055 [Member] Five Point Eight Seven Five Percent Guaranteed Notes Due 2055 City Area Code City Area Code Document Information [Table] Document Information [Table] Document Period End Date Document Period End Date Country Region Country Region Amendment Flag Amendment Flag Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, City or Town Entity Address, City or Town Five Point Six Percent Guaranteed Notes Due 2056 Five Point Six Percent Guaranteed Notes Due 2056 [Member] Five Point Six Percent Guaranteed Notes Due 2056 Entity Address, Country Entity Address, Country Current Fiscal Year End Date Current Fiscal Year End Date Security Exchange Name Security Exchange Name Document Information [Line Items] Document Information [Line Items] Document Type Document Type Class of Stock [Axis] Class of Stock [Axis] Pre-commencement Tender Offer Pre-commencement Tender Offer Five Point Two Percent Guaranteed Notes Due 2029 Five Point Two Percent Guaranteed Notes Due 2029 [Member] Five Point Two Percent Guaranteed Notes Due 2029 Entity Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company