Investments (Tables)

3 Months Ended

Mar. 31, 2015

Investments [Abstract]

Fair value of short and long-term investments classified as available for sale

At March 31, 2015 and December 31, 2014, the estimated fair value of our short-term and long-term investments classified as available for sale, were as follows:

	March 31, 2015
	Gross Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(In millions)
Short-term investments:
Restricted cash	$	36	$	—	$	—		$	36
Corporate debt securities	3,108		2		(1		)	3,109
Government and agency securities	5		—		—			5
Time deposits and other	60		—		—			60
Equity instruments	10		986		—			996
	$	3,219	$	988	$	(1	)	$	4,206
Long-term investments:
Corporate debt securities	5,360		31		(10		)	5,381
Government and agency securities	51		—		—			51
	$	5,411	$	31	$	(10	)	$	5,432

	December 31, 2014
	Gross Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(In millions)
Short-term investments:
Restricted cash	$	29	$	—	$	—		$	29
Corporate debt securities	2,519		1		(1		)	2,519
Government and agency securities	3		—		—			3
Time deposits and other	181		—		—			181
Equity instruments	10		1,028		—			1,038
	$	2,742	$	1,029	$	(1	)	$	3,770
Long-term investments:
Corporate debt securities	5,319		18		(18		)	5,319
Government and agency securities	232		1		—			233
	$	5,551	$	19	$	(18	)	$	5,552

Estimated fair values of short and long-term investments classified by date of contractual maturity

The estimated fair values of our short-term and long-term investments classified as available for sale by date of contractual maturity at March 31, 2015 are as follows:

	March 31, 2015
	(In millions)
One year or less (including restricted cash of $36)	$	3,210
One year through two years	1,776
Two years through three years	2,188
Three years through four years	1,073
Four years through five years	324
Five years through six years	58
Six years through seven years	1
Seven years through eight years	—
Eight years through nine years	11
Nine years through ten years	1
	$	8,642