Earnings (Loss) Per Share (EPS) (Shares Repurchase Program) (Details) (USD $) Share data in Millions, unless otherwise specified	9 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Oct. 31, 2014	Nov. 01, 2013	Dec. 31, 2013 Accelerated Share Repurchase	May 02, 2014 Accelerated Share Repurchase	Jan. 31, 2014 Accelerated Share Repurchase	Mar. 31, 2014 Second Accelerated Share Repurchase	Aug. 01, 2014 Second Accelerated Share Repurchase	May 02, 2014 Second Accelerated Share Repurchase
Accelerated Share Repurchases [Line Items]
Aggregate purchase price			$ 300,000,000			$ 200,000,000
Repurchases of stock	213,000,000	17,000,000			300,000,000			200,000,000
Shares repurchased and retired	6.3			1.0	5.6		0.8	4.5
Value of initial shares repurchased				$ 45,000,000	$ 255,000,000		$ 32,000,000	$ 168,000,000