Dividend and Share Repurchase (Narrative)(Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended			3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 May 2013 Share Repurchase Program [Member]	Sep. 30, 2014 May 2014 Share Repurchase Program [Member]	Sep. 30, 2014 May 2014 Share Repurchase Program [Member]	Sep. 30, 2014 May 2013 Return of Capital Plan [Member]	Sep. 30, 2014 May 2014 Return of Capital Plan [Member]	Dec. 31, 2014 Subsequent Event [Member]
Return of capital to shareholders								$ 1,000	$ 2,750
Stock Repurchase Program, Authorized Amount					500	2,000	2,000
Stock Repurchase Program Expiration Date							Dec. 31, 2016	Jun. 30, 2016
Share repurchase program, completion date					Jun. 30, 2014
Common Stock, Dividends, Per Share, Approved			$ 0.09
Stock Repurchased and Retired During Period, Shares			16.4			6.6	9.1
Stock Repurchased and Retired During Period, Value			600			250	350
Dividends Payable, Date Declared	Jul. 25, 2014									Oct. 24, 2014
Cash Dividends Declared Per Share	$ 0.09	$ 0.06	$ 0.21	$ 0.06						$ 0.09
Dividends Payable, Date of Record	Aug. 08, 2014									Nov. 07, 2014
Dividends, Cash	$ 75		$ 176