v3.24.4
Fair Value Measurements and Investments (Tables)
 3 Months Ended
Dec. 31, 2024
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Assets and Liabilities Measured at Fair Value on a Recurring Basis
 Fair Value Measurements
Using Inputs Considered as
 Level 1Level 2
 December 31,
2024		September 30,
2024		December 31,
2024		September 30,
2024
 (in millions)
Assets
Cash equivalents and restricted cash equivalents:
Money market funds
$10,623 $10,403 $— $— 
U.S. Treasury securities
7 7 — — 
Investment securities:
Marketable equity securities
334 301 — — 
U.S. government-sponsored debt securities
— — 304 496 
U.S. Treasury securities
3,086 4,948 — — 
Other current and non-current assets:
Money market funds
25 25 — — 
Derivative instruments
— — 448 103 
Total $14,075 $15,684 $752 $599 
Liabilities
Accrued compensation and benefits:
Deferred compensation liability
$261 $238 $— $— 
Accrued and other liabilities:
Derivative instruments
— — 272 226 
Total $261 $238 $272 $226 
Schedule of Amortized Cost, Unrealized Gains and Losses, and Fair Value of Debt Securities
The amortized cost, unrealized gains and losses and fair value of debt securities were as follows:
December 31, 2024
Amortized
Cost		Gross UnrealizedFair
Value
GainsLosses
(in millions)
U.S. government-sponsored debt securities$303 $1 $— $304 
U.S. Treasury securities3,079 14 — 3,093 
Total$3,382 $15 $— $3,397 
September 30, 2024
Amortized
Cost		Gross UnrealizedFair
Value
GainsLosses
(in millions)
U.S. government-sponsored debt securities$492 $4 $— $496 
U.S. Treasury securities4,920 40 (5)4,955 
Total$5,412 $44 $(5)$5,451 
Schedule of Debt Securities Classified by Contractual Maturity Date
The stated maturities of debt securities were as follows:
December 31,
2024
 (in millions)
Due within one year$1,713 
Due after one year through five years
1,684 
Total$3,397 
Schedule of Non-Marketable Equity Securities
The following table summarizes the Company’s non-marketable equity securities held as of period end that were accounted for using the fair value measurement alternative:
December 31,
2024		September 30,
2024
(in millions)
Initial cost basis
$711 $711 
Adjustments:
Upward adjustments
909 910 
Downward adjustments, including impairment
(552)(465)
Carrying amount
$1,068 $1,156 
Unrealized gains and losses of the Company’s non-marketable equity securities held as of period end that were accounted for using the fair value measurement alternative were as follows:
Three Months Ended
December 31,
20242023
(in millions)
Upward adjustments$— $9 
Downward adjustments, including impairment
$(91)$—