Stockholders' Equity (Schedule of Consolidated Changes in Equity) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended								3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended							3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Comprehensive Income [Member]	Jun. 30, 2010 Comprehensive Income [Member]		Jun. 30, 2011 Comprehensive Income [Member]	Jun. 30, 2010 Comprehensive Income [Member]		Jun. 30, 2011 Comprehensive Income [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2010 Comprehensive Income [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2011 Comprehensive Income [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2010 Comprehensive Income [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2011 Comprehensive Income [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2010 Comprehensive Income [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2011 Comprehensive Income [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2010 Comprehensive Income [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2011 Preferred Stock [Member]	Mar. 31, 2011 Preferred Stock [Member]	Dec. 31, 2010 Preferred Stock [Member]	Jun. 30, 2010 Preferred Stock [Member]	Mar. 31, 2010 Preferred Stock [Member]	Dec. 31, 2009 Preferred Stock [Member]	Jun. 30, 2011 Common Stock [Member]	Jun. 30, 2011 Common Stock [Member]	Jun. 30, 2010 Common Stock [Member]	Mar. 31, 2010 Common Stock [Member]	Jun. 30, 2011 Additional Paid-in-Capital [Member]	Jun. 30, 2010 Additional Paid-in-Capital [Member]	Jun. 30, 2011 Additional Paid-in-Capital [Member]	Jun. 30, 2010 Additional Paid-in-Capital [Member]	Jun. 30, 2011 Reinvested Earnings [Member]	Jun. 30, 2010 Reinvested Earnings [Member]	Jun. 30, 2011 Reinvested Earnings [Member]	Jun. 30, 2010 Reinvested Earnings [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Loss [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Loss [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Loss [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Loss [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Loss [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Loss [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Loss [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Loss [Member] Pension Plans, Defined Benefit [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Loss [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Loss [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2011 Accumulated Other Comprehensive Loss [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2010 Accumulated Other Comprehensive Loss [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2011 Treasury Stock [Member]	Mar. 31, 2011 Treasury Stock [Member]	Jun. 30, 2010 Treasury Stock [Member]	Mar. 31, 2010 Treasury Stock [Member]	Dec. 31, 2009 Treasury Stock [Member]	Jun. 30, 2011 Noncontrolling Interests [Member]	Jun. 30, 2010 Noncontrolling Interests [Member]	Jun. 30, 2011 Noncontrolling Interests [Member]	Jun. 30, 2010 Noncontrolling Interests [Member]	Jun. 30, 2011 Pension Plans, Defined Benefit [Member]	Jun. 30, 2010 Pension Plans, Defined Benefit [Member]	Jun. 30, 2011 Pension Plans, Defined Benefit [Member]	Jun. 30, 2010 Pension Plans, Defined Benefit [Member]	Jun. 30, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2010 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Jun. 30, 2010 Other Postretirement Benefit Plans, Defined Benefit [Member]
Beginning balance	$ 11,279	$ 8,423	$ 9,743	$ 7,651															$ 237	$ 237	$ 237	$ 237	$ 237	$ 237	$ 304	$ 301	$ 297	$ 298	$ 9,772	$ 8,514	$ 9,227	$ 8,469	$ 12,852	$ 11,463	$ 12,030	$ 10,710	$ (5,629)	$ (5,804)	$ (5,790)	$ (5,771)									$ (6,727)	$ (6,727)	$ (6,727)	$ (6,727)	$ (6,727)	$ 470	$ 442	$ 465	$ 436
Net income	1,229	1,168	2,673	2,305	1,229	1,168		2,673	2,305																								1,218	1,159	2,649	2,288																		11	9	24	17
Cumulative translation adjustment	73	(89)	117	(151)	73	(89)		117	(151)																												73	(89)	117	(150)																	(1)
Net revaluation and clearance of cash flow hedges to earnings	13	18	34	(12)	13	18		34	(12)																												15	18	37	(12)														(2)		(3)
Pension benefit plans											99	87	202	167	(10)	(7)	(19)	(27)																							99	87	202	167	(10)	(7)	(19)	(27)										99	87	202	167	(10)	(7)	(19)	(27)
Net unrealized gain (loss) on securities	(1)	(1)		(3)	(1)	(1)			(3)																												(1)	(1)		(3)
Other comprehensive income (loss), net of tax	174	8	334	(26)	174	8		334	(26)
Comprehensive income	1,403	1,176	3,007	2,279	1,403	1,176	[1]	3,007	2,279	[2]
Common dividends	(385)	(376)	(775)	(750)																													(385)	(375)	(768)	(748)																			(1)	(7)	(2)
Preferred dividends	(2)	(2)	(5)	(5)																													(2)	(2)	(5)	(5)
Common stock issued - compensation plans	207	55	804	101																					1	6	1		206	55	798	100
Common stock repurchased			272																																														(272)
Common stock retired			0																							(2)					(47)				(223)														272
Total Equity	12,502	9,276	12,502	9,276															237	237	237	237	237	237	305	305	298	298	9,978	8,569	9,978	8,569	13,683	12,245	13,683	12,245	(5,453)	(5,796)	(5,453)	(5,796)									(6,727)	(6,727)	(6,727)	(6,727)	(6,727)	479	450	479	450
Comprehensive income attributable to noncontrolling interests					$ 9	$ 9		$ 21	$ 16

[1] Includes comprehensive income attributable to noncontrolling interests of $9 for the three months ended June 30, 2011 and 2010.

[2] Includes comprehensive income attributable to noncontrolling interests of $21 and $16 for the six months ended June 30, 2011 and 2010, respectively.