Held-to-Maturity Investments

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Held-to-Maturity Investments

4. Held-to-Maturity Investments

The following table summarizes the Company's held-to-maturity investments at December 31, 2022 (amount in millions):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized losses		Estimated Fair Value (Level 1)
U.S. treasuries and government agency securities	$	4,932	$	1	$	(3)	$	4,930

At December 31, 2022, all contractual maturities of held-to-maturity investments were less than 12 months.