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Costs Associated with Exit and Restructuring Activities (Tables)
 9 Months Ended
Sep. 29, 2018
Restructuring and Related Activities [Abstract]  
Rollforward of Exit and Restructuring Accruals
A rollforward of the exit and restructuring accruals is as follows (in millions):
 
Three Months Ended
 
Nine Months Ended
 
September 29,
2018
 
September 30,
2017
 
September 29,
2018

September 30,
2017
Balance at the beginning of the period
$
4

 
$
7

 
$
8

 
$
10

Charged to earnings
4

 
5

 
9

 
10

Cash paid
(3
)
 
(4
)
 
(12
)
 
(12
)
Balance at the end of the period
$
5

 
$
8

 
$
5

 
$
8