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Fair Value Measurements (Tables)
3 Months Ended
Apr. 03, 2016
Fair Value Disclosures [Abstract]  
Schedule of Fair Value Assets Measured on Recurring Basis
 
 
Fair Value Measurements on a Recurring Basis
As of First Quarter-End 2016
Description
 
Total
 
Level 1
 
Level 2
 
Level 3
 
 
(In millions of dollars)
Money market funds
 
$
3.9

 
$
3.9

 
$

 
$

Available-for-sale investment
 
131.6

 
131.6

 

 

 
 
 
 
 
 
 
 
 
Total assets at fair value
 
$
135.5

 
$
135.5

 
$

 
$

 
 
Fair Value Measurements on a Recurring Basis
As of Year-End 2015
Description
 
Total
 
Level 1
 
Level 2
 
Level 3
 
 
(In millions of dollars)
Money market funds
 
$
3.7

 
$
3.7

 
$

 
$

Available-for-sale investment
 
142.3

 
142.3

 

 

 
 
 
 
 
 
 
 
 
Total assets at fair value
 
$
146.0

 
$
146.0

 
$

 
$