Fair Value Measurements (Tables)

12 Months Ended

Oct. 01, 2023

Oct. 02, 2022

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on A Recurring Basis

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

			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		—
U.S. government treasury securities	2.8		2.8		—		—
Foreign government obligations	3.9		—		3.9		—
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	$	—

			Fair Value Measurements at Reporting Date Using
	Balance at October 2, 2022		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	$	2,818.4	$	2,797.3	$	21.1	$	—
Short-term investments:
Available-for-sale debt securities
Corporate debt securities	22.4		—		22.4		—
U.S. government treasury securities	9.3		9.3		—		—
Total available-for-sale debt securities	31.7		9.3		22.4		—
Structured deposits	275.1		—		275.1		—
Marketable equity securities	57.7		57.7		—		—
Total short-term investments	364.5		67.0		297.5		—
Prepaid expenses and other current assets:
Derivative assets	75.1		—		75.1		—
Long-term investments:
Available-for-sale debt securities
Corporate debt securities	134.7		—		134.7		—
Foreign government obligations	3.8		—		3.8		—
Mortgage and other asset-backed securities	56.5		—		56.5		—
State and local government obligations	1.3		—		1.3		—
U.S. government treasury securities	82.8		82.8		—		—
Total long-term investments	279.1		82.8		196.3		—
Other long-term assets:
Derivative assets	156.2		—		156.2		—
Total assets	$	3,693.3	$	2,947.1	$	746.2	$	—
Liabilities:
Accrued liabilities:
Derivative liabilities	$	21.0	$	—	$	21.0	$	—
Other long-term liabilities:
Derivative liabilities	34.0		—		34.0		—
Total liabilities	$	55.0	$	—	$	55.0	$	—