Fair Value Measurements (Tables)

6 Months Ended

Jun. 29, 2014

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis

	Fair Value Measurements on a Recurring Basis As of Second Quarter-End 2014
Description	Total		Level 1		Level 2		Level 3
	(In millions of dollars)
Money market funds	$	3.0	$	3.0	$	—	$	—
Available-for-sale investment	98.0		98.0		—		—
Total assets at fair value	$	101.0	$	101.0	$	—	$	—

	Fair Value Measurements on a Recurring Basis As of Year-End 2013
Description	Total		Level 1		Level 2		Level 3
	(In millions of dollars)
Money market funds	$	2.9	$	2.9	$	—	$	—
Available-for-sale investment	80.7		80.7		—		—
Total assets at fair value	$	83.6	$	83.6	$	—	$	—