Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Summary of Debt

As of December 31, 2021 and December 31, 2020, 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 December 31, 2021				At December 31, 2020
Unsecured Senior Notes	Interest Rate	Semi-Annual Interest Payments Due On	Maturity	Principal		Fair Value (Level 2)		Principal		Fair Value (Level 2)
2026 Notes	3.40%	Mar. 15 & Sept. 15	Sept. 2026	$	850	$	912	$	850	$	970
2027 Notes	3.40%	Jun. 15 & Dec. 15	Jun. 2027	400		430		400		454
2030 Notes	1.35%	Mar. 15 & Sept. 15	Sept. 2030	500		463		500		490
2047 Notes	4.50%	Jun. 15 & Dec. 15	Jun. 2047	400		480		400		525
2050 Notes	2.50%	Mar. 15 & Sept. 15	Sept. 2050	1,500		1,320		1,500		1,462
Total gross long-term debt				$	3,650			$	3,650
Unamortized discount and deferred financing costs				(42)				(45)
Total net carrying amount				$	3,608			$	3,605