Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Marketable Securities [Table Text Block]

	Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(In millions)
June 30, 2014
United States government obligations
Maturity less than 1 year	$	298	$	—	$	—		$	298
Maturity 1 to 5 years	90		—		—			90
Government–sponsored enterprise obligations
Maturity 1 to 5 years	3		—		—			3
Corporate debt securities
Maturity 1 to 5 years	72		—		—			72
Other debt securities
Maturity less than 1 year	68		—		—			68
Maturity 1 to 5 years	3		—		—			3
Equity securities
Available-for-sale	382		—		(11		)	371
	$	916	$	—	$	(11	)	$	905

	Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(In millions)
December 31, 2013
United States government obligations
Maturity less than 1 year	$	395	$	—	$	—		$	395
Maturity 1 to 5 years	124		—		—			124
Government–sponsored enterprise obligations
Maturity 1 to 5 years	4		—		—			4
Corporate debt securities
Maturity 1 to 5 years	16		—		—			16
Other debt securities
Maturity less than 1 year	38		—		—			38
Maturity 1 to 5 years	3		—		—			3
Equity securities
Available-for-sale	362		1		(2		)	361
	$	942	$	1	$	(2	)	$	941