Existing Indentures means (1) the Indenture dated as of April 20, 2009, among the Issuer, the guarantors named therein and The Bank of New York Mellon, as trustee, as amended and supplemented by the First Supplemental Indenture through the Fifteenth Supplemental Indenture, the resolutions dated as of April 20, 2009 authorizing the 8.910% Senior Notes due 2017 and the resolutions dated as of September 22, 2009 authorizing the 6.750% Senior Notes due 2019, and as may be further amended and supplemented, (2) the Indenture dated as of February 7, 2012, among the Issuer, the guarantors named therein and The Bank of New York Mellon, as trustee, as amended and supplemented by the First Supplemental Indenture through the Thirteenth Supplemental Indenture and the resolutions dated as of January 31, 2012 authorizing the 5.875% Senior Notes due 2022, the resolutions dated as of April 3, 2013 and May 8, 2013 authorizing the 4.375% Senior Notes due 2023, the resolutions dated as of November 21, 2013 authorizing the 4.000% Senior Notes due 2018, the resolutions dated as of November 21, 2013 authorizing the 5.625% Senior Notes due 2024, the resolutions dated as of October 30, 2015 authorizing the 4.875% Senior Notes due 2025 and as may be further amended and supplemented and (3) the Indenture dated as of September 11, 2012, among the Issuer, the guarantors named therein and The Bank of New York Mellon, as trustee, pursuant to which the 0.5% Exchangeable Senior Notes due 2032 were issued, as amended and supplemented by the First Supplemental Indenture through the Twelfth Supplemental Indenture, and as may be further amended and supplemented.