Investments (Tables)

9 Months Ended

Sep. 27, 2013

Available-For-Sale Marketable Securities

At September 27, 2013, and December 28, 2012, available-for-sale marketable securities consisted of the following:

September 27, 2013	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
U.S. government debt obligations	$	60.9	$	—	$	(0.7	)	$	60.2
Corporate debt obligations		53.7		—		(0.2	)		53.5
Mortgaged backed debt obligations guaranteed by GNMA		95.8		—		(1.7	)		94.1
Certificates of deposit guaranteed by FDIC		1.2		—		—			1.2
Foreign corporate debt obligations guaranteed by foreign governments		25.5		0.1		—			25.6
Total	$	237.1	$	0.1	$	(2.6	)	$	234.6
December 28, 2012
U.S. government debt obligations	$	31.1	$	—	$	—		$	31.1
Corporate debt obligations		9.5		0.1		—			9.6
Mortgaged backed debt obligations guaranteed by GNMA		54.9		0.6		—			55.5
Certificates of deposit guaranteed by FDIC		1.2		—		—			1.2
Foreign government debt obligations		159.3		1.8		—			161.1
Foreign corporate debt obligations guaranteed by foreign governments		121.5		0.7		—			122.2
Total	$	377.5	$	3.2	$	—		$	380.7

Maturities of Available-For-Sale Marketable Securities

The following table summarizes the maturities of our available-for-sale marketable securities at September 27, 2013:

	Amortized Cost		Fair Value
Less than 12 months	$	56.2	$	56.3
Due in 1 to 5 years		85.1		84.1
Due after 5 years		95.8		94.2
Total	$	237.1	$	234.6

Investments in Marketable Securities with Unrealized Losses

Investments in marketable securities with unrealized losses at September 27, 2013, were as follows:

	Unrealized Loss Less than 12 months					Unrealized Loss Greater than 12 months				Total
September 27, 2013	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government debt obligations	$	44.2	$	(0.7	)	$	—	$	—	$	44.2	$	(0.7	)
Corporate debt obligations		41.9		(0.2	)		—		—		41.9		(0.2	)
Mortgaged backed debt obligations guaranteed by GNMA		83.1		(1.7	)		—		—		83.1		(1.7	)
Total	$	169.2	$	(2.6	)	$	—	$	—	$	169.2	$	(2.6	)

Gross Realized Gains and Losses Related to Fixed Income Investments

The following table presents gross realized gains and losses related to fixed income investments:

	Third Quarter						Nine Months
	9/27/13			9/28/12			9/27/13			9/28/12
Gross realized gains	$	0.1		$	1.0		$	1.8		$	1.5
Gross realized losses		(0.3	)		(0.2	)		(1.0	)		(0.7	)
Total	$	(0.2	)	$	0.8		$	0.8		$	0.8