Fair Value Measurements and Investments (Tables)

9 Months Ended

Jun. 30, 2020

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 1				Level 2
	June 30, 2020		September 30, 2019		June 30, 2020		September 30, 2019
	(in millions)
Assets
Cash equivalents and restricted cash equivalents:
Money market funds	$	12,739	$	6,494
U.S. government-sponsored debt securities					$	—	$	150
Investment securities:
Marketable equity securities	140		126
U.S. government-sponsored debt securities					2,892		5,592
U.S. Treasury securities	254		675
Other current and non-current assets:
Derivative instruments					672		437
Total	$	13,133	$	7,295	$	3,564	$	6,179
Liabilities
Accrued compensation and benefits:
Deferred compensation liability	$	128	$	113
Accrued and other liabilities:
Derivative instruments					$	247	$	52
Total	$	128	$	113	$	247	$	52

Equity Securities without Readily Determinable Fair Value

The following table summarizes the total carrying value of the Company’s non-marketable equity securities held as of June 30, 2020 including cumulative unrealized gains and losses:

	June 30, 2020
	(in millions)
Initial cost basis	$	834
Upward adjustments	175
Downward adjustments (including impairment)	(11)
Carrying amount, end of period	$	998

Schedule of Gains and Losses on Marketable and Non-Marketable Equity Securities

Gains and losses on the Company’s equity securities are summarized below.

	Three Months Ended June 30,				Nine Months Ended June 30,
	2020		2019		2020		2019
	(in millions)
Net gain (loss) on equity securities sold during the period	$	—	$	1	$	5	$	16
Unrealized gain (loss) on equity securities held as of the end of the period	68		10		59		69
Total gain (loss) recognized in non-operating income (expense), net	$	68	$	11	$	64	$	85