Common and Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2015

Text Block [Abstract]

Schedule of Share Repurchases

In millions, except per share amounts		2015		2014		2013
Number of shares repurchased		39.9		3.3		-
Average price paid per share	$	7.60	$	10.45	$	-
Remaining authorization as of December 31	$	94	$	188	$	23