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Deferred Revenue And Remaining Performance Obligations (Tables)
 3 Months Ended
Apr. 03, 2020
Revenue Recognition and Deferred Revenue [Abstract]  
Deferred Revenue And Performance Obligations
Changes to our deferred revenue during the first quarter of fiscal 2020 and 2019 were as follows: 
  
First Quarter of
(In millions)
2020
 
2019
Beginning balance of the period
$
541.9

 
$
387.3

Revenue recognized
(201.8
)
 
(138.4
)
Net deferred revenue activity
211.4

 
215.5

Ending balance of the period
$
551.5

 
$
464.4