Fair Value Measurements (Tables)

6 Months Ended

Apr. 02, 2017

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 Apr 2, 2017		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	$	2,163.9	$	2,163.9	$	—	$	—
Short-term investments:
Available-for-sale securities
Agency obligations	3.3		—		3.3		—
Commercial paper	19.4		—		19.4		—
Corporate debt securities	52.7		—		52.7		—
Foreign government obligations	5.8		—		5.8
U.S. government treasury securities	63.7		63.7		—		—
State and local government obligations	3.0		—		3.0		—
Certificates of deposit	12.3		—		12.3		—
Total available-for-sale securities	160.2		63.7		96.5		—
Trading securities	70.8		70.8		—		—
Total short-term investments	231.0		134.5		96.5		—
Prepaid expenses and other current assets:
Derivative assets	21.7		0.6		21.1		—
Long-term investments:
Available-for-sale securities
Agency obligations	35.5		—		35.5		—
Corporate debt securities	419.6		—		419.6		—
Auction rate securities	5.9		—		—		5.9
Foreign government obligations	62.4		—		62.4		—
U.S. government treasury securities	281.8		281.8		—		—
State and local government obligations	10.2		—		10.2		—
Mortgage and other asset-backed securities	254.7		—		254.7		—
Total long-term investments	1,070.1		281.8		782.4		5.9
Other long-term assets:
Derivative assets	22.5		—		22.5		—
Total assets	$	3,509.2	$	2,580.8	$	922.5	$	5.9
Liabilities:
Accrued liabilities:
Derivative liabilities	$	13.6	$	1.4	$	12.2	$	—
Other long-term liabilities:
Derivative liabilities	14.9		—		14.9		—
Total liabilities	$	28.5	$	1.4	$	27.1	$	—

			Fair Value Measurements at Reporting Date Using
	Balance at Oct 2, 2016		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	$	2,128.8	$	2,128.8	$	—	$	—
Short-term investments:
Available-for-sale securities
Agency obligations	1.3		—		1.3		—
Commercial paper	2.6		—		2.6		—
Corporate debt securities	34.2		—		34.2		—
Foreign government obligations	5.5		—		5.5		—
U.S. government treasury securities	15.8		15.8		—		—
State and local government obligations	0.5		—		0.5		—
Certificates of deposit	5.8		—		5.8		—
Total available-for-sale securities	65.7		15.8		49.9		—
Trading securities	68.7		68.7		—		—
Total short-term investments	134.4		84.5		49.9		—
Prepaid expenses and other current assets:
Derivative assets	27.7		3.1		24.6		—
Long-term investments:
Available-for-sale securities
Agency obligations	44.4		—		44.4		—
Corporate debt securities	459.3		—		459.3		—
Auction rate securities	5.7		—		—		5.7
Foreign government obligations	46.7		—		46.7		—
U.S. government treasury securities	358.2		358.2		—		—
State and local government obligations	57.5		—		57.5		—
Mortgage and other asset-backed securities	169.9		—		169.9		—
Total long-term investments	1,141.7		358.2		777.8		5.7
Other long-term assets:
Derivative assets	6.4		—		6.4		—
Total assets	$	3,439.0	$	2,574.6	$	858.7	$	5.7
Liabilities:
Accrued liabilities:
Derivative liabilities	$	18.0	$	1.7	$	16.3	$	—
Other long-term liabilities:
Derivative liabilities	71.6		—		71.6		—
Total	$	89.6	$	1.7	$	87.9	$	—