Fair Value Measurements (Tables)

12 Months Ended

Sep. 29, 2024

Oct. 01, 2023

Assets and Liabilities Measured at Fair Value on a Recurring Basis (in millions):


			Fair Value Measurements at Reporting Date Using
	Balance at September 29, 2024		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	$	3,286.2	$	3,286.2	$	—	$	—
Short-term investments:
Available-for-sale debt securities:



Corporate debt securities	51.8		—		51.8		—
Foreign corporate bonds	0.2		—		0.2		—

Mortgage and other asset-backed securities	0.4		—		0.4		—

State and local government obligations	1.4		—		1.4		—
U.S. government treasury securities	36.9		36.9		—		—

Total available-for-sale debt securities	90.7		36.9		53.8		—
Structured deposits	84.1		—		84.1		—
Marketable equity securities	82.2		82.2		—		—
Total short-term investments	257.0		119.1		137.9		—
Prepaid expenses and other current assets:
Derivative assets	8.7		—		8.7		—
Long-term investments:
Available-for-sale debt securities:



Corporate debt securities	112.8		—		101.8		11.0

Mortgage and other asset-backed securities	64.4		—		64.4		—
State and local government obligations	3.7		—		3.7		—
U.S. government treasury securities	94.9		94.9		—		—
Total Available-for-sale debt securities	275.8		94.9		169.9		11.0
Structured Deposit	0.2		—		0.2		—
Total long-term investments	276.0		94.9		170.1		11.0
Other long-term assets:
Derivative assets	179.1		—		179.1		—
Total assets	$	4,007.0	$	3,500.2	$	495.8	$	11.0
Liabilities:
Accrued liabilities:
Derivative liabilities	$	29.2	$	—	$	29.2	$	—
Other long-term liabilities:
Derivative liabilities	56.7		—		56.7		—
Total liabilities	$	85.9	$	—	$	85.9	$	—


			Fair Value Measurements at Reporting Date Using
	Balance at October 1, 2023		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	$	3,551.5	$	3,551.5	$	—	$	—
Short-term investments:
Available-for-sale debt securities



Corporate debt securities	64.0		—		64.0		—
Foreign government obligations	3.9		—		3.9		—

U.S. government treasury securities	2.8		2.8		—		—
Total available-for-sale debt securities	70.7		2.8		67.9		—
Structured deposits	261.2		—		261.2		—
Marketable equity securities	69.6		69.6		—		—
Total short-term investments	401.5		72.4		329.1		—
Prepaid expenses and other current assets:
Derivative assets	41.0		—		41.0		—
Long-term investments:
Available-for-sale debt securities



Corporate debt securities	91.1		—		91.1		—

Mortgage and other asset-backed securities	50.2		—		50.2		—
State and local government obligations	1.3		—		1.3		—
U.S. government treasury securities	104.7		104.7		—		—
Total long-term investments	247.3		104.7		142.6		—
Other long-term assets:
Derivative assets	153.0		—		153.0		—
Total assets	$	4,394.3	$	3,728.6	$	665.7	$	—
Liabilities:
Accrued liabilities:
Derivative liabilities	$	3.6	$	—	$	3.6	$	—
Other long-term liabilities:
Derivative liabilities	43.2		—		43.2		—
Total liabilities	$	46.8	$	—	$	46.8	$	—