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Property, Plant and Equipment
 12 Months Ended
Sep. 03, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment

As of
2014
 
Additions
 
Retirements and Other
 
2015
Land
$
86

 
$
2

 
$
—

 
$
88

Buildings (includes $289 as of 2014 and $271 as of 2015 for capital leases)
5,093

 
273

 
(8
)
 
5,358

Equipment(1) (includes $1,113 as of 2014 and $1,192 as of 2015 for capital leases)
17,781

 
3,805

 
(566
)
 
21,020

Construction in progress(2)
114

 
345

 
(23
)
 
436

Software
358

 
39

 
(24
)
 
373

 
23,432

 
4,464

 
(621
)
 
27,275

Accumulated depreciation (includes $695 as of 2014 and $717 as of 2015 for capital leases)
(14,750
)
 
(2,550
)
 
579

 
(16,721
)
 
$
8,682

 
$
1,914

 
$
(42
)
 
$
10,554


(1) 
Included costs related to equipment not placed into service of $928 million and $826 million, as of September 3, 2015 and August 28, 2014, respectively.
(2) 
Included building-related construction and tool installation costs on assets not placed into service.

Depreciation expense was $2.55 billion, $1.99 billion, and $1.72 billion for 2015, 2014, and 2013, respectively. Other noncurrent assets included land held for development of $58 million as of September 3, 2015 and $57 million as of August 28, 2014. As of September 3, 2015, production equipment and buildings with an aggregate carrying value of $248 million and land with a carrying value of $42 million were pledged as collateral under various notes payable. (See "Debt – Other Facilities" note.)