Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment, at Cost

Property and equipment, at cost, consisted of the following (in millions):

	December 31,
	2016		2017
Gross property and equipment (1):
Land and buildings	$	13,998	$	23,718
Equipment and internal-use software (2)	25,989		38,387
Other corporate assets	649		2,390
Construction in progress	1,805		4,078
Gross property and equipment	42,441		68,573
Total accumulated depreciation (1)	13,327		19,707
Total property and equipment, net	$	29,114	$	48,866

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(1) Excludes the original cost and accumulated depreciation of fully-depreciated assets.

(2) Includes internal-use software of $1.4 billion and $1.1 billion as of December 31, 2016 and 2017.