Investments (Tables)

3 Months Ended

Mar. 30, 2012

Investments [Abstract]

Available-For-Sale Marketable Securities

	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
March 30, 2012
U.S. government debt obligations	$	185.6	$	0.4	$	(0.1	)	$	185.9
Corporate debt obligations guaranteed by FDIC		50.6		—		—			50.6
Corporate debt obligations		193.7		1.2		(0.2	)		194.7
Mortgaged backed debt obligations guaranteed by GNMA		83.7		0.5		(0.2	)		84.0
Certificates of deposit guaranteed by FDIC		1.5		—		—			1.5
Foreign government debt obligations		236.2		2.0		(0.1	)		238.1
Foreign corporate debt obligations		66.0		0.4		—			66.4
Total	$	817.3	$	4.5	$	(0.6	)	$	821.2
December 30, 2011
U.S. government debt obligations	$	195.2	$	0.5	$	—		$	195.7
Corporate debt obligations guaranteed by FDIC		66.6		0.2		—			66.8
Corporate debt obligations		201.4		0.8		(0.7	)		201.5
Mortgaged backed debt obligations guaranteed by GNMA		90.9		0.4		(0.1	)		91.2
Certificates of deposit guaranteed by FDIC		1.5		—		—			1.5
Foreign government debt obligations		221.5		1.5		—			223.0
Foreign corporate debt obligations		64.1		0.2		(0.1	)		64.2
Total	$	841.2	$	3.6	$	(0.9	)	$	843.9

Maturities Of Available-For-Sale Marketable Securities

	Amortized Cost		Fair Value
Less than 12 months	$	281.8	$	282.1
Due in 1 to 5 years		451.8		455.1
Due after 5 years		83.7		84.0
Total	$	817.3	$	821.2

Investments In Marketable Securities With Unrealized Losses

	Unrealized Loss Less than 12 months					Unrealized Loss Greater than 12 months				Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
March 30, 2012
U.S. government debt obligations	$	107.4	$	(0.1	)	$	—	$	—	$	107.4	$	(0.1	)
Corporate debt obligations		54.5		(0.2	)		—		—		54.5		(0.2	)
Mortgaged backed debt obligations guaranteed by GNMA		24.0		(0.2	)		—		—		24.0		(0.2	)
Foreign government debt obligations		80.5		(0.1	)		—		—		80.5		(0.1	)
Total	$	266.4	$	(0.6	)	$	—	$	—	$	266.4	$	(0.6	)
December 30, 2011
Corporate debt obligations	$	81.0	$	(0.7	)	$	—	$	—	$	81.0	$	(0.7	)
Mortgaged backed debt obligations guaranteed by GNMA		31.4		(0.1	)		—		—		31.4		(0.1	)
Foreign government debt obligations		24.1		(0.1	)		—		—		24.1		(0.1	)
Total	$	136.5	$	(0.9	)	$	—	$	—	$	136.5	$	(0.9	)

Gross Realized Gains And Losses Related To Fixed Income Investments

	3/30/12			4/1/11
Gross realized gains	$	0.3		$	0.4
Gross realized losses		(0.3	)		(0.5	)
Total	$	—		$	(0.1	)