Investments (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Trading Securities [Table Text Block]

The following table summarizes the fair value of investments held as of March 31, 2015 and December 31, 2014 (in millions):

	March 31, 2015		December 31, 2014
Debt securities	$	32	$	—
Equity securities	13		—
Total	$	45	$	—