Investments (Tables)

6 Months Ended

Jul. 01, 2011

Investments [Abstract]

Available-For-Sale Marketable Securities

July 1, 2011	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
U.S. government debt obligations	$	98.0	$	0.1	$	(0.1	)	$	98.0
Corporate debt obligations guaranteed by FDIC		102.7		0.4		(0.1	)		103.0
Corporate debt obligations		229.1		0.7		(0.6	)		229.2
Mortgage-backed debt obligations guaranteed by GNMA		99.0		0.6		(0.4	)		99.2
Certificates of deposit guaranteed by FDIC		2.0		—		—			2.0
Foreign government debt obligations		222.0		0.4		(1.0	)		221.4
Foreign corporate debt obligations guaranteed by foreign governments		91.9		0.1		(0.4	)		91.6
Total	$	844.7	$	2.3	$	(2.6	)	$	844.4
December 31, 2010
U.S. government debt obligations	$	259.0	$	0.1	$	(0.7	)	$	258.4
Corporate debt obligations guaranteed by FDIC		102.3		0.3		—			102.6
Corporate debt obligations		95.6		0.5		(0.2	)		95.9
Mortgage-backed debt obligations guaranteed by GNMA		175.5		0.8		(1.2	)		175.1
Certificates of deposit guaranteed by FDIC		3.3		—		—			3.3
Foreign government debt obligations		201.4		1.6		(0.9	)		202.1
Foreign corporate debt obligations guaranteed by foreign governments		87.8		0.6		(0.1	)		88.3
Total	$	924.9	$	3.9	$	(3.1	)	$	925.7

Maturities Of Available-For-Sale Marketable Investments

	Amortized Cost		Fair Value
Less than 12 months	$	179.8	$	180.3
Due in 1 to 5 years		555.4		554.6
Due after 5 years		109.5		109.5
Total	$	844.7	$	844.4

Investments In Marketable Securities With Unrealized Losses

	Unrealized Loss Less than 12 months					Unrealized Loss Greater than 12 months					Total
July 1, 2011	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government debt obligations	$	27.1	$	(0.1	)	$	—	$	—		$	27.1	$	(0.1	)
Corporate debt obligations guaranteed by FDIC		11.3		(0.1	)		—		—			11.3		(0.1	)
Corporate debt obligations		110.9		(0.6	)		—		—			110.9		(0.6	)
Mortgage-backed debt obligations guaranteed by GNMA		37.4		(0.3	)		2.4		(0.1	)		39.9		(0.4	)
Foreign government debt obligations		132.3		(1.0	)		—		—			132.3		(1.0	)
Foreign government debt obligations guaranteed by foreign governments		51.2		(0.4	)		—		—			51.2		(0.4	)
Total	$	370.2	$	(2.5	)	$	2.4	$	(0.1	)	$	372.6	$	(2.6	)
December 31, 2010
U.S. government debt obligations	$	218.6	$	(0.7	)	$	—	$	—		$	218.6	$	(0.7	)
Corporate debt obligations		47.5		(0.2	)		—		—			47.5		(0.2	)
Mortgage-backed debt obligations guaranteed by GNMA		115.7		(1.2	)		—		—			115.7		(1.2	)
Foreign government debt obligations		92.9		(0.9	)		—		—			92.9		(0.9	)
Foreign government debt obligations guaranteed by foreign governments		32.6		(0.1	)		—		—			32.6		(0.1	)
Total	$	507.3	$	(3.1	)	$	—	$	—		$	507.3	$	(3.1	)

Gross Realized Gains And Losses Related To Fixed Income Investments

	Second Quarter						Six Months
	7/1/11			7/2/10			7/1/11			7/2/10
Gross realized gains	$	1.0		$	4.5		$	1.4		$	7.9
Gross realized losses		(1.3	)		(0.2	)		(1.8	)		(0.4	)
Total	$	(0.3	)	$	4.3		$	(0.4	)	$	7.5