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Property, Plant, and Equipment
 12 Months Ended
Aug. 30, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment
Property, Plant, and Equipment

As of
 
2018
 
2017
Land
 
$
345

 
$
345

Buildings (includes $483 and $475, respectively, under capital leases)
 
8,680

 
7,958

Equipment(1) (includes $1,336 and $1,331, respectively, under capital leases)
 
38,249

 
32,187

Construction in progress(2)
 
1,162

 
499

Software
 
655

 
544

 
 
49,091

 
41,533

Accumulated depreciation (includes $868 and $626, respectively, under capital leases)
 
(25,419
)
 
(22,102
)
 
 
$
23,672

 
$
19,431


(1) 
Included costs related to equipment not placed into service of $1.73 billion and $994 million, as of August 30, 2018 and August 31, 2017, respectively.
(2) 
Included building-related construction and tool installation costs for assets not placed into service.

Depreciation expense was $4.66 billion, $3.76 billion, and $2.86 billion for 2018, 2017, and 2016, respectively. As of August 30, 2018, production equipment, buildings, and land with an aggregate carrying value of $2.33 billion were pledged as collateral under various notes payable. Interest capitalized as part of the cost of property, plant, and equipment was $44 million, $7 million, and $43 million for 2018, 2017, and 2016, respectively.