v3.25.2
Fair Value Measurements and Investments (Tables)
 9 Months Ended
Jun. 30, 2025
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
 June 30,
2025		September 30,
2024		June 30,
2025		September 30,
2024
 (in millions)
Assets
Cash equivalents and restricted cash equivalents:
Money market funds
$13,412 $10,403 $— $— 
U.S. Treasury securities
7 7 — — 
Investment securities:
Marketable equity securities
318 301 — — 
U.S. government-sponsored debt securities
— — 304 496 
U.S. Treasury securities
2,669 4,948 — — 
Other current and non-current assets:
Money market funds
27 25 — — 
Derivative instruments
— — 89 103 
Total $16,433 $15,684 $393 $599 
Liabilities
Accrued compensation and benefits:
Deferred compensation liability
$254 $238 $— $— 
Accrued and other liabilities:
Derivative instruments
— — 435 226 
Total $254 $238 $435 $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:
June 30, 2025
Amortized
Cost		Gross UnrealizedFair
Value
GainsLosses
(in millions)
U.S. government-sponsored debt securities$303 $1 $— $304 
U.S. Treasury securities2,661 15 — 2,676 
Total$2,964 $16 $— $2,980 
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:
June 30,
2025
 (in millions)
Due within one year$1,840 
Due after one year through five years
1,140 
Total$2,980 
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:
June 30,
2025		September 30,
2024
(in millions)
Initial cost basis
$709 $711 
Adjustments:
Upward adjustments
854 910 
Downward adjustments, including impairment
(495)(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
June 30,		Nine Months Ended
June 30,
2025202420252024
(in millions)
Upward adjustments$4 $— $11 $9 
Downward adjustments, including impairment
$(2)$(13)$(51)$(28)