Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities (Tables)

12 Months Ended

Dec. 31, 2023

Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities

Schedule of marketable investment securities, restricted cash and cash equivalents, and other investment securities

	As of
	December 31,		December 31,
	2023		2022
	(In thousands)
Marketable investment securities:
Current marketable investment securities:
Strategic - available-for-sale	$	144	$	144
Strategic - trading/equity		7,799		655
Other		179		835,184
Total current marketable investment securities		8,122		835,983
Restricted marketable investment securities (1)		19,772		41,689
Total marketable investment securities		27,894		877,672
Restricted cash and cash equivalents (1)		89,107		62,925
Other investment securities, net:
Equity method investments		126,179		129,655
Cost method investments		3,448		750
Fair value method investments		39,198		37,795
Total other investment securities, net		168,825		168,200
Total marketable investment securities, restricted cash and cash equivalents, and other investment securities	$	285,826	$	1,108,797

(1) Restricted marketable investment securities and restricted cash and cash equivalents are included in “Restricted cash, cash equivalents and marketable investment securities” on our Consolidated Balance Sheets.

Schedule of fair value measurements

	As of
	December 31, 2023								December 31, 2022
	Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
	(In thousands)
Cash equivalents (including restricted)	$	347,976	$	304,410	$	43,566	$	—	$	1,620,458	$	174,050	$	1,446,408	$	—
Debt securities (including restricted):
U.S. Treasury and agency securities	$	7,567	$	7,567	$	—	$	—	$	22,824	$	22,824	$	—	$	—
Commercial paper		7,500		—		7,500		—		696,324		—		696,324		—
Corporate securities		4,705		—		4,705		—		156,380		—		156,380		—
Other		323		—		179		144		1,489		—		1,345		144
Equity securities		7,799		7,799		—		—		655		655		—		—
Total	$	27,894	$	15,366	$	12,384	$	144	$	877,672	$	23,479	$	854,049	$	144

Schedule of gains and losses on sales and changes in carrying amounts of investments and other

	For the Years Ended December 31,
Other, net:	2023		2022		2021
	(In thousands)
Marketable and non-marketable investment securities - realized and unrealized gains (losses)	$	4,085	$	26,186	$	(3,137)
Derivative instruments - net realized and/or unrealized gains (losses) (1)		(1,793,387)		1,015,387		(13,000)
Gains (losses) related to early redemption of debt (2)		73,024		(922)		(3,587)
Equity in earnings (losses) of affiliates		(3,835)		2,616		(1,051)
Other		(21,763)		(4,285)		41,332
Total	$	(1,741,876)	$	1,038,982	$	20,557

(1) The change in the derivative’s carrying value for the year ended December 31, 2023 was primarily driven by a decrease in our estimated probability of exercising the option. This amount includes the $100 million prepayment previously made to T-Mobile.

(2) This change primarily resulted from repurchases of our Convertible Notes and 5 7/8% Senior Notes due 2024 during the year ended December 31, 2023. See Note 9 for further information.