Fair Value Measurement of Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

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

The following tables summarize our financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 and 2014:

Description	Balances as of December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
	(In millions)
Assets:
Cash and cash equivalents	$	1,832	$	1,664	$	168
Short-term investments:
Restricted cash	28		28		—
Corporate debt securities	3,287		—		3,287
Government and agency securities	55		—		55
Equity instruments	929		929		—
Total short-term investments	4,299		957		3,342
Derivatives	97		—		97
Long-term investments:
Corporate debt securities	3,267		—		3,267
Total long-term investments	3,267		—		3,267
Total financial assets	$	9,495	$	2,621	$	6,874
Liabilities:
Derivatives	$	25	$	—	$	25

Description	Balances as of December 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
	(In millions)
Assets:
Cash and cash equivalents	$	4,105	$	1,694	$	2,411
Short-term investments:
Restricted cash	19		19		—
Corporate debt securities	2,519		—		2,519
Government and agency securities	3		—		3
Time deposits	152		—		152
Equity instruments	1,037		1,037		—
Total short-term investments	3,730		1,056		2,674
Derivatives	84		—		84
Long-term investments:
Corporate debt securities	5,319		—		5,319
Government and agency securities	233		—		233
Total long-term investments	5,552		—		5,552
Total financial assets	$	13,471	$	2,750	$	10,721
Liabilities:
Derivatives	$	20	$	—	$	20

Description	Balances as of December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
	(In millions)
Assets:
Cash and cash equivalents	$	1,832	$	1,664	$	168
Short-term investments:
Restricted cash	28		28		—
Corporate debt securities	3,287		—		3,287
Government and agency securities	55		—		55
Equity instruments	929		929		—
Total short-term investments	4,299		957		3,342
Derivatives	97		—		97
Long-term investments:
Corporate debt securities	3,267		—		3,267
Total long-term investments	3,267		—		3,267
Total financial assets	$	9,495	$	2,621	$	6,874
Liabilities:
Derivatives	$	25	$	—	$	25