Compensation Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Apr. 30, 2011 Equity and Incentive Plan [Member]	Apr. 30, 2011 Equity and Incentive Plan [Member]	Dec. 31, 2013 Equity and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based compensation cost	$ 129	$ 105	$ 113
Income tax benefits related to stock-based compensation arrangements	$ 43	$ 35	$ 37
Maximum Number Of Shares Reserved For Grant Or Settlement Of Awards					110,000,000
Shares in excess must be counted against maximum number of shares granted					30,000,000
Number of shares each share counts against maximum once base threshold is exceeded				4.5
Shares authorized for future grants						51,000,000