Dividend and Share Repurchase (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Dividend and Share Repurchase [Abstract]
Return of capital to shareholders				$ 1,000,000,000
Cash dividends declared per common share	$ 0.06	$ 0.06	$ 0.06	$ 0.12	$ 0	$ 0
Dividends Payable, Date of Record	Feb. 21, 2014	Nov. 06, 2013	Aug. 09, 2013
Dividends Payable, Date to be Paid	Mar. 14, 2014	Nov. 26, 2013	Sep. 10, 2013
Dividends, Cash				51,000,000
Stock Repurchase Program, Authorized Amount				500,000,000
Share repurchase program, completion date				Jun. 30, 2016
Stock Repurchased and Retired During Period, Shares				10
Stock Repurchased and Retired During Period, Value				$ 250,000,000
Dividends Payable, Date Declared	Feb. 07, 2014