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Debt (Tables)
3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Summary of Debt
As of March 31, 2023 and December 31, 2022, we had $3.7 billion of gross unsecured senior notes outstanding. A summary of our outstanding unsecured senior notes is as follows (amounts in millions):

 At March 31, 2023At December 31, 2022
Unsecured Senior NotesInterest RateSemi-Annual Interest Payments Due OnMaturityPrincipalFair Value
(Level 2)
PrincipalFair Value
(Level 2)
2026 Notes3.40%Mar. 15 & Sept. 15Sept. 2026$850 $823 $850 $810 
2027 Notes3.40%Jun. 15 & Dec. 15Jun. 2027400 384 400 378 
2030 Notes1.35%Mar. 15 & Sept. 15Sept. 2030500 406 500 391 
2047 Notes4.50%Jun. 15 & Dec. 15Jun. 2047400 378 400 353 
2050 Notes2.50%Mar. 15 & Sept. 15Sept. 20501,500 1,009 1,500 936 
Total gross long-term debt$3,650 $3,650 
Unamortized discount and deferred financing costs(39)(39)
Total net carrying amount$3,611 $3,611