pre_text: Debt At both December 31, 2019 and December 31, 2018, our total outstanding debt was $2.7 billion, bearing interest at a weighted average rate of 3.18%. A summary of our outstanding debt as of December 31, 2019, is as follows (amounts in millions):
table: December 31, 2019
table: Gross Carrying Amount Unamortized Discount and Deferred Financing Costs Net Carrying Amount
table: 2021 Notes $650 $(2) $648
table: 2022 Notes 400 (2) 398
table: 2026 Notes 850 (7) 843
table: 2027 Notes 400 (5) 395
table: 2047 Notes 400 (9) 391
table: Total debt $2,700 $(25) $2,675
question: Analyse this data from a financial earnings document. What is the sum of the 2 highest gross carrying amounts?