Fair Value Measurement of Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of fair value of assets and liabilities measured on a recurring basis

The following tables present our financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2018 and December 31, 2017 (in millions):



	March 31, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	$	2,527	$	2,527	$	—
Short-term investments:
Restricted cash	19		19		—
Corporate debt securities	2,260		—		2,260
Total short-term investments	2,279		19		2,260
Derivatives	31		—		31
Long-term investments:
Corporate debt securities	5,017		—		5,017
Total long-term investments	5,017		—		5,017
Total financial assets	$	9,854	$	2,546	$	7,308

Liabilities:
Derivatives	$	86	$	—	$	86



	December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	$	2,120	$	2,120	$	—
Short-term investments:
Restricted cash	20		20		—
Corporate debt securities	3,723		—		3,723
Total short-term investments	3,743		20		3,723
Derivatives	28		—		28
Long-term investments:
Corporate debt securities	5,446		—		5,446
Total long-term investments	5,446		—		5,446
Total financial assets	$	11,337	$	2,140	$	9,197

Liabilities:
Derivatives	$	29	$	—	$	29