Held-to-Maturity Investments (Tables)

6 Months Ended

Jun. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Debt Securities, Held-to-Maturity

The following tables summarize the Company's held-to-maturity investments (amount in millions):

	At June 30, 2023
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized losses		Estimated Fair Value (Level 1)
U.S. treasuries and government agency securities	$	2,956	$	1	$	—	$	2,957

	At December 31, 2022
	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