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Other Financial Data (Tables)
 12 Months Ended
Dec. 28, 2019
Other Income and Expenses [Abstract]  
Schedule of of Other Expense/(Income)
Other expense/(income)
Other expense/(income) consists of the following (in millions):
 
December 28, 2019
 
December 29, 2018
 
December 30, 2017
Amortization of prior service costs/(credits)
$
(306
)
 
$
(311
)
 
$
(328
)
Net pension and postretirement non-service cost/(benefit)(a)
(172
)
 
(40
)
 
(308
)
Loss/(gain) on sale of business
(420
)
 
15

 
—

Interest income
(36
)
 
(35
)
 
(43
)
Foreign exchange loss/(gain)
10

 
166

 
13

Other miscellaneous expense/(income)
(28
)
 
37

 
39

Other expense/(income)
$
(952
)
 
$
(168
)
 
$
(627
)
(a)
Excludes amortization of prior service costs/(credits).