INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Amortized Cost, Gross Unrealized Gains and Losses, Fair Values of Investments

The amortized cost, gross unrealized gains, gross unrealized losses, and fair value of our AFS investments as of December 31, 2021 and 2020 are presented below:

	December 31, 2021								December 31, 2020
(in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Asset-backed securities	$	49	$	—	$	—	$	49	$	24	$	—	$	—	$	24
Corporate bonds	167		1		(1)		167		126		2		—		128
U.S. government agencies and government-sponsored agencies	17		—		—		17		27		1		—		28
U.S. treasuries	285		1		(1)		285		261		4		—		265
Certificate of deposit	11		—		—		11		—		—		—		—
Other debt securities	9		—		—		9		6		—		—		6
Total	$	538	$	2	$	(2)	$	538	$	444	$	7	$	—	$	451

Fair Value of Debt Investments by Contractual Maturity

The fair value of debt investments by contractual maturity are shown below:

(in millions)	December 31, 2021
One year or less	$	193
Over one year through five years	310
Over five years through ten years	10
Over ten years	25
Total fair value	$	538

Proceeds from Available-for-sale Securities

The gross proceeds from sales and maturities of AFS securities for the years ended December 31, 2021, 2020, and 2019 are presented below. We had immaterial gross realized gains and losses from sales of investments for the years ended December 31, 2021, 2020, and 2019.

	Year Ended December 31,
(in millions)	2021		2020		2019
Gross proceeds from sales	$	162	$	93	$	76
Gross proceeds from maturities	187		131		83
Total	$	349	$	224	$	159