Equity, Stock Related Disclosures (Details) (USD $)	1 Months Ended	12 Months Ended					0 Months Ended	12 Months Ended											1 Months Ended	12 Months Ended					1 Months Ended
	Feb. 28, 2008	Dec. 31, 2013	Dec. 31, 2013 Approvals Under Program One [Member]	Dec. 31, 2013 Approvals Under Program Two [Member]	Dec. 31, 2013 Shares Purchased Under Programs, Cost [Member]	Dec. 31, 2012 Shares Purchased Under Programs, Cost [Member]	Jan. 22, 2014 Subsequent Event [Member] Dividend Declared [Member]	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member] Shares Purchased Under Programs, Cost [Member]	Dec. 31, 2012 Common Stock [Member] Shares Purchased Under Programs, Cost [Member]	Dec. 31, 2013 Treasury Stock [Member]	Dec. 31, 2012 Treasury Stock [Member]	Dec. 31, 2011 Treasury Stock [Member]	Dec. 31, 2013 Treasury Stock [Member] Shares Purchased Under Programs, Cost [Member]	Dec. 31, 2012 Treasury Stock [Member] Shares Purchased Under Programs, Cost [Member]	Dec. 31, 2011 Treasury Stock [Member] Shares Purchased Under Programs, Cost [Member]	Jan. 31, 2014 Treasury Stock [Member] Subsequent Event [Member] Shares Purchased Under Programs, Cost [Member]	Dec. 31, 2013 Shares Purchased Related To Stock-Based Compensation Plans [Member] Treasury Stock [Member]	Dec. 31, 2012 Shares Purchased Related To Stock-Based Compensation Plans [Member] Treasury Stock [Member]	Dec. 31, 2011 Shares Purchased Related To Stock-Based Compensation Plans [Member] Treasury Stock [Member]	Dec. 31, 2013 Shares Purchased Under Programs [Member] Treasury Stock [Member]	Dec. 31, 2012 Shares Purchased Under Programs [Member] Treasury Stock [Member]	Jan. 31, 2014 Shares Purchased Under Programs [Member] Treasury Stock [Member] Subsequent Event [Member]
Share Activity Rollforward
Common Stock, Beginning Balance								673,000,000	673,000,000	673,000,000
Treasury Stock, Beginning Balance		(121,406,520)											(121,000,000)	(117,000,000)	(105,000,000)
Transactions in connection with stock-based compensation plans:
Stock issuances								0	0	0			6,000,000	6,000,000	5,000,000
Stock repurchases																				(6,000,000)	(6,000,000)	(17,000,000)	(17,000,000)	(4,000,000)	(4,000,000)
Common Stock, Ending Balance								673,000,000	673,000,000	673,000,000
Treasury Stock, Ending Balance		(137,932,138)											(138,000,000)	(121,000,000)	(117,000,000)
Equity (Textual)
Preferred stock, shares authorized		20,000,000
Preferred stock, par value per share		$ 0.01
Common stock purchase program, date approved	Feb. 28, 2008
Authorized amount under stock purchase program			$ 6,000,000,000	$ 3,000,000,000
Stock repurchases under buyback program					692,000,000	118,000,000					0	0				692,000,000	118,000,000	0	208,000,000
Remaining amount authorized under stock purchase programs		$ 2,600,000,000
Stock repurchases																				6,000,000	6,000,000	17,000,000	17,000,000	4,000,000	4,000,000
Dividends payable, date declared							Jan. 22, 2014
Dividends payable, amount per share							$ 0.25
Dividends payable, date to be paid							Mar. 12, 2014
Dividends payable, date of record							Feb. 12, 2014