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Fair Value Measurements and Investments
6 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements and Investments
Note 5—Fair Value Measurements and Investments
Assets and Liabilities Measured at Fair Value on a Recurring Basis
 Fair Value Measurements
Using Inputs Considered as
 Level 1Level 2
 March 31,
2023
September 30,
2022
March 31,
2023
September 30,
2022
 (in millions)
Assets
Cash equivalents and restricted cash equivalents:
Money market funds
$11,548 $11,736 $ $— 
U.S. Treasury securities
 799  — 
Investment securities:
Marketable equity securities
327 437  — 
U.S. government-sponsored debt securities
 — 1,016 457 
U.S. Treasury securities
4,249 4,005  — 
Other current and non-current assets:
Money market funds
22 22  — 
Derivative instruments
 — 158 1,131 
Total $16,146 $16,999 $1,174 $1,588 
Liabilities
Accrued compensation and benefits:
Deferred compensation liability
$171 $146 $ $— 
Accrued and other liabilities:
Derivative instruments
 — 389 418 
Total $171 $146 $389 $418 
Level 1 assets and liabilities. Money market funds, U.S. Treasury securities and marketable equity securities are classified as Level 1 within the fair value hierarchy, as fair value is based on unadjusted quoted prices in active markets for identical assets. The Company’s deferred compensation liability is measured at fair value based on marketable equity securities held under the deferred compensation plan.
Level 2 assets and liabilities. The fair value of U.S. government-sponsored debt securities, as provided by third-party pricing vendors, is based on quoted prices in active markets for similar, not identical, assets. Derivative instruments are valued using inputs that are observable in the market or can be derived principally from or corroborated by observable market data.
U.S. Government-sponsored Debt Securities and U.S. Treasury Securities
The amortized cost, unrealized gains and losses and fair value of debt securities were as follows:
March 31, 2023
Amortized
Cost
Gross UnrealizedFair
Value
GainsLosses
(in millions)
U.S. government-sponsored debt securities$1,016 $$(1)$1,016 
U.S. Treasury securities4,332 (89)4,249 
Total$5,348 $7 $(90)$5,265 
September 30, 2022
Amortized
Cost
Gross UnrealizedFair
Value
GainsLosses
(in millions)
U.S. government-sponsored debt securities$458 $— $(1)$457 
U.S. Treasury securities4,937 — (133)4,804 
Total$5,395 $— $(134)$5,261 
Debt securities with unrealized losses for less than 12 months and 12 months or greater were as follows:
March 31, 2023
Less Than 12 Months
12 Months or Greater
Fair ValueGross Unrealized LossesFair ValueGross Unrealized Losses
(in millions)
U.S. government-sponsored debt securities$179 $(1)$— $— 
U.S. Treasury securities882 (11)2,270 (78)
Total$1,061 $(12)$2,270 $(78)
September 30, 2022
Less Than 12 Months
Fair ValueGross Unrealized Losses
(in millions)
U.S. government-sponsored debt securities$408 $(1)
U.S. Treasury securities3,507 (133)
Total$3,915 $(134)
The unrealized losses were primarily attributable to changes in interest rates.
The stated maturities of debt securities were as follows:
March 31,
2023
 (in millions)
Due within one year$2,425 
Due after 1 year through 5 years2,840 
Total$5,265 
Equity Securities
The Company’s non-marketable equity securities are investments in privately held companies without readily determinable market values. These investments are measured at fair value on a non-recurring basis and are classified as Level 3 due to the absence of quoted market prices, the inherent lack of liquidity and the fact that inputs used to measure fair value are unobservable and require management’s judgment.
The following table summarizes the total carrying value of the Company’s non-marketable equity securities held as of March 31, 2023 including cumulative unrealized gains and losses:
March 31,
2023
(in millions)
Initial cost basis$754 
Adjustments:
Upward adjustments829 
Downward adjustments (including impairment)(438)
Carrying amount, end of period$1,145 
Unrealized gains and losses included in the carrying value of the Company’s non-marketable equity securities still held as of March 31, 2023 and 2022 were as follows:
Three Months Ended
March 31,
Six Months Ended
March 31,
2023202220232022
(in millions)
Upward adjustments$2 $$19 $226 
Downward adjustments (including impairment)$(89)$(53)$(89)$(53)

For the three months ended March 31, 2023 and 2022, the Company recognized net unrealized losses of $82 million and $156 million, respectively, on marketable and non-marketable equity securities still held as of quarter end. For the six months ended March 31, 2023 and 2022, the Company recognized net unrealized losses of $184 million and net unrealized gains of $16 million, respectively, on marketable and non-marketable equity securities still held as of quarter end.
Other Fair Value Disclosures
Debt. Debt instruments are measured at amortized cost on the Company’s consolidated balance sheets. The fair value of the debt instruments, as provided by third-party pricing vendors, is based on quoted prices in active markets for similar, not identical, assets. If measured at fair value in the financial statements, these instruments would be classified as Level 2 in the fair value hierarchy. As of March 31, 2023, the carrying value and estimated fair value of debt was $20.6 billion and $18.9 billion, respectively. As of September 30, 2022, the carrying value and estimated fair value of debt was $22.5 billion and $19.9 billion, respectively.
Other financial instruments not measured at fair value. As of March 31, 2023, the carrying values of settlement receivable and payable and customer collateral are an approximate fair value due to their generally short maturities. If measured at fair value in the financial statements, these financial instruments would be classified as Level 2 in the fair value hierarchy.
Non-financial assets. Certain non-financial assets such as goodwill, intangible assets and property, equipment and technology are subject to non-recurring fair value measurements if they are deemed to be impaired. The Company performed its annual impairment review of its indefinite-lived intangible assets and goodwill as of February 1, 2023, and concluded there was no impairment as of that date. No recent events or changes in circumstances indicated that impairment existed as of March 31, 2023