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