Fair Value Measurements (Tables)

6 Months Ended

Mar. 30, 2014

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 Mar 30, 2014		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	$	1,190.3	$	1,190.3	$	—	$	—
Short-term investments:
Available-for-sale securities
Commercial paper	4.0		—		4.0		—
Corporate debt securities	16.3		—		16.3		—
Foreign government obligations	6.4		—		6.4		—
US government treasury securities	44.0		44.0		—		—
State and local government obligations	14.4		—		14.4		—
Short-term bond funds	80.1		80.1		—		—
Certificates of deposit	63.8		—		63.8		—
Total available-for-sale securities	229.0		124.1		104.9		—
Trading securities	70.2		70.2		—		—
Total short-term investments	299.2		194.3		104.9		—
Prepaid expenses and other current assets:
Derivative assets	27.7		5.2		22.5		—
Long-term investments:
Available-for-sale securities
Agency obligations	9.2		—		9.2		—
Corporate debt securities	196.8		—		196.8		—
Auction rate securities	13.5		—		—		13.5
Foreign government obligations	4.0		—		4.0		—
US government treasury securities	148.9		148.9		—		—
State and local government obligations	6.9		—		6.9		—
Mortgage and asset-backed securities	70.5		—		70.5		—
Total long-term investments	449.8		148.9		287.4		13.5
Other assets:
Derivative assets	11.8		—		11.8		—
Total	$	1,978.8	$	1,538.7	$	426.6	$	13.5
Liabilities:
Accrued liabilities:
Derivative liabilities	$	0.4	$	0.2	$	0.2	$	—
Other long-term liabilities:
Derivative liabilities	0.2		—		0.2		—
Total	$	0.6	$	0.2	$	0.4	$	—

			Fair Value Measurements at Reporting Date Using
	Balance at Sep 29, 2013		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	$	2,575.7	$	2,575.7	$	—	$	—
Short-term investments:
Available-for-sale securities
Agency obligations	20.0		—		20.0		—
Commercial paper	127.0		—		127.0		—
Corporate debt securities	57.5		—		57.5		—
Government treasury securities	352.9		352.9		—		—
Certificates of deposit	34.1		—		34.1		—
Total available-for-sale securities	591.5		352.9		238.6		—
Trading securities	66.6		66.6		—		—
Total short-term investments	658.1		419.5		238.6		—
Prepaid expenses and other current assets:
Derivative assets	12.5		—		12.5		—
Long-term investments:
Available-for-sale securities
Agency obligations	8.1		—		8.1		—
Corporate debt securities	36.8		—		36.8		—
Auction rate securities	13.4		—		—		13.4
Total long-term investments	58.3		—		44.9		13.4
Other assets:
Derivative assets	11.4		—		11.4		—
Total	$	3,316.0	$	2,995.2	$	307.4	$	13.4
Liabilities:
Accrued liabilities:
Derivative liabilities	$	3.5	$	—	$	3.5	$	—
Other long-term liabilities:
Derivative liabilities	0.5		—		0.5		—
Total	$	4.0	$	—	$	4.0	$	—