0.750% Notes Due 2032 [Member] Notes 0.750 percent due 2032 [Member] Notes 0.750% due 2032 [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code 0.250% Notes Due 2027 [Member] Notes 0.250 percent Due 2027 [Member] Notes 0.250% Due 2027 [Member] Entity Address, City or Town Entity Address, City or Town Soliciting Material Soliciting Material Entity Address, Address Line One Entity Address, Address Line One Security Exchange Name Security Exchange Name Document Information [Line Items] Document Information [Line Items] City Area Code City Area Code Cover [Abstract] Cover [Abstract] 2.0% Exchangeable Subordinated Debentures Due 2029 [Member] Exchangeable Subordinated Debentures 2.0 Percent Due 2029 [Member] Exchangeable Subordinated Debentures 2.0% Due 2029 [Member] Entity Tax Identification Number Entity Tax Identification Number Entity File Number Entity File Number Entity Central Index Key Entity Central Index Key Document Type Document Type Document Information [Table] Document Information [Table] 1.875% Notes Due 2036 [Member] Notes 1.875 percent due 2036 [Member] Notes 1.875% due 2036 [Member] Entity Emerging Growth Company Entity Emerging Growth Company 9.455% Guaranteed Notes Due 2022 [Member] Guaranteed Notes 9.455 Percent Due 2022 [Member] Guaranteed Notes 9.455% Due 2022 [Member] Title of 12(b) Security Title of 12(b) Security Entity Address, State or Province Entity Address, State or Province Amendment Flag Amendment Flag Class of Stock [Domain] Class of Stock [Domain] Trading Symbol Trading Symbol Document Period End Date Document Period End Date Class of Stock [Axis] Class of Stock [Axis] Entity Registrant Name Entity Registrant Name Written Communications Written Communications Pre-commencement Tender Offer Pre-commencement Tender Offer Class A Common Stock [Member] Common Class A [Member] Local Phone Number Local Phone Number 5.50% Notes Due 2029 [Member] Notes 5.50 Percent Due 2029 [Member] Notes 5.50% Due 2029 [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code 1.250% Notes Due 2040 [Member] Notes 1.250 percent due 2040 [Member] Notes 1.250% due 2040 [Member] 1.500% Notes Due 2029 [Member] Notes 1.500 percent Due 2029 [Member] Notes 1.500% Due 2029 [Member] Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer