The following table summarizes the expenses (excluding non-cash charges) and payments related to the restructuring plan (in millions):
 
During the years ended December 31,
 
Separation Costs
 
Other
 
Total
Restructuring liabilities as of December 31, 2013
$
—

 
$
—

 
$
—

Expense
353

 
32

 
385

Payments
(132
)
 
(9
)
 
(141
)
Restructuring liabilities as of December 31, 2014
221

 
23

 
244

Expense
52

 
80

 
132

Payments
(178
)
 
(80
)
 
(258
)
Restructuring liabilities as of December 31, 2015
95

 
23

 
118

Expense
6

 
13

 
19

Payments
(90
)
 
(27
)
 
(117
)
Restructuring liabilities as of December 31, 2016
$
11

 
$
9

 
$
20