Short-Term and Long-Term Investments Short-Term and Long-Term Investments (Tables)

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

As of December 31, 2014, the term deposits and available-for-sale securities consisted of the following (in millions):

	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cetip equity securities	$	324	$	55	$	—	$	379
Term deposits	1,173		—		—		1,173
Mutual funds	27		—		—		27
Total term deposits and available-for-sale securities	$	1,524	$	55	$	—	$	1,579

As of December 31, 2013, available-for-sale securities consisted of the following (in millions):

	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cetip equity securities	$	324	$	—	$	—	$	324
U.S. Treasury securities	37		—		—		37
Mutual funds	33		—		—		33
Foreign exchange derivative contracts	4		—		—		4
Total available-for-sale securities	$	398	$	—	$	—	$	398