Shareholders' Equity (Details) (USD $)	3 Months Ended								12 Months Ended														1 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Additional Paid-in Capital [Member]	Dec. 31, 2013 Retained Earnings [Member]	Dec. 31, 2012 Retained Earnings [Member]	Dec. 31, 2011 Retained Earnings [Member]	Dec. 31, 2013 Treasury Stock [Member]	Dec. 31, 2012 Treasury Stock [Member]	Dec. 31, 2011 Treasury Stock [Member]	Dec. 31, 2012 2000 Share Repurchase Program [Member]	Dec. 31, 2000 2000 Share Repurchase Program [Member]	Dec. 31, 2013 2012 Share Repurchase Program [Member]	Dec. 31, 2012 2012 Share Repurchase Program [Member]	Oct. 31, 2013 2013 Share Repurchase Program [Member]	Dec. 31, 2013 2013 Share Repurchase Program [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 17,640,700,000				$ 14,773,900,000				$ 17,640,700,000	$ 14,773,900,000
Common stock shares in treasury, shares in thousands	833,000				2,850,000				833,000	2,850,000
Net income	727,500,000	1,203,100,000	1,206,200,000	1,548,000,000	827,200,000	1,326,600,000	923,600,000	1,011,100,000	4,684,800,000	4,088,600,000	4,347,700,000		4,684,800,000	4,088,600,000	4,347,700,000
Treasury Stock, Retired, Cost Method, Amount									0	100,000	0	(100,000)	(1,677,800,000)	(711,700,000)		1,698,100,000	721,100,000	100,000	(419,200,000)		(1,100,000,000)	(400,000,000)		(500,000,000)
Stock Repurchased During Period, Shares											0
Stock Repurchase Program, Authorized Amount																				3,000,000,000		1,500,000,000	5,000,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount																							4,500,000,000
Treasury Stock, Shares, Retired																(32,406,000)	(14,912,000)	(1,000)
Preferred Stock, Shares Authorized	5,000,000								5,000,000
Preferred Stock, Shares Issued	0								0
Common Stock, Shares Held in Employee Trust, Shares	50,000,000				50,000,000				50,000,000	50,000,000
Employee benefit trust	3,013,200,000				3,013,200,000				3,013,200,000	3,013,200,000
Other comprehensive income (loss)									1,794,400,000	61,500,000	(1,188,500,000)
Allocated Share-based Compensation Expense									$ 144,900,000	$ 141,500,000	$ 147,400,000
Issued shares, shares in thousands	1,117,628,000				1,146,493,000				1,117,628,000	1,146,493,000