Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Summary of assets and liabilities measured at fair value

The following table summarizes the types of assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy (in millions):



	June 30, 2019								December 31, 2018
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Available-for-sale debt securities:
U.S. treasury securities	$	3,916	$	—	$	—	$	3,916	$	3,969	$	—	$	—	$	3,969
Certificates of deposit	—		5,385		—		5,385		—		4,361		—		4,361
U.S. government agencies securities	—		1,531		—		1,531		—		938		—		938
Non-U.S. government securities	—		420		—		420		—		305		—		305
Corporate debt securities	—		13,271		—		13,271		—		13,067		—		13,067
Residential mortgage and asset-backed securities	—		536		—		536		—		1,524		—		1,524
Equity securities:
Money market funds	3,007		—		—		3,007		5,305		—		—		5,305
Publicly traded equity securities	1,172		16		—		1,188		881		—		—		881
Deferred compensation plan	156		—		—		156		124		—		—		124
Foreign currency derivative contracts	—		48		—		48		—		78		—		78
Total	$	8,251	$	21,207	$	—	$	29,458	$	10,279	$	20,273	$	—	$	30,552
Liabilities:
Deferred compensation plan	$	156	$	—	$	—	$	156	$	124	$	—	$	—	$	124
Foreign currency derivative contracts	—		6		—		6		—		1		—		1
Total	$	156	$	6	$	—	$	162	$	124	$	1	$	—	$	125

Summary of Classification of Equity Securities

The following table summarizes the classification of our equity securities in our Condensed Consolidated Balance Sheets (in millions):



	June 30, 2019		December 31, 2018
Cash and cash equivalents	$	3,007	$	5,305
Prepaid and other current assets	1,178		863
Other long-term assets	166		142
Total	$	4,351	$	6,310