Supplemental Equity and Comprehensive Income Information (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Increase (decrease) in equity
Balance at the beginning of the period	$ 16,887	$ 16,017	$ 13,851	$ 16,017	$ 13,302
Net income	1,177		1,140	2,280	2,095
Cumulative translation adjustment	234		(358)	476	(453)
Defined benefit pension and postretirement plans adjustment	54		48	130	99
Debt and equity securities - unrealized gain (loss)	(2)		1	(3)	2
Cash flow hedging instruments - unrealized gain (loss)			40	(17)	63
Total comprehensive income	1,463		871	2,866	1,806
Dividends paid	(391)		(375)	(783)	(749)
Business combination allocation to noncontrolling interest				56
Purchase and sale of subsidiary shares - net	(9)	(33)		(42)
Purchase of subsidiary shares and transfers from noncontrolling interest					(256)
Stock-based compensation, net of tax impacts	85		64	216	176
Reacquired stock	(669)		(384)	(1,344)	(404)
Issuances pursuant to stock option and benefit plans	376		236	756	388
Balance at the end of the period	17,742	16,887	14,263	17,742	14,263
Common Stock and Additional Paid-in Capital
Increase (decrease) in equity
Balance at the beginning of the period	3,608	3,477	3,269	3,477	3,162
Purchase and sale of subsidiary shares - net	(1)			(1)
Purchase of subsidiary shares and transfers from noncontrolling interest			12		7
Stock-based compensation, net of tax impacts	85		64	216	176
Balance at the end of the period	3,692		3,345	3,692	3,345
Retained Earnings
Increase (decrease) in equity
Balance at the beginning of the period	26,521	25,995	24,231	25,995	23,753
Net income	1,160		1,121	2,241	2,051
Dividends paid	(391)		(375)	(783)	(749)
Issuances pursuant to stock option and benefit plans	(180)		(189)	(343)	(267)
Balance at the end of the period	27,110		24,788	27,110	24,788
Treasury Stock
Increase (decrease) in equity
Balance at the beginning of the period	(10,398)	(10,266)	(10,187)	(10,266)	(10,397)
Reacquired stock	(669)		(384)	(1,344)	(404)
Issuances pursuant to stock option and benefit plans	556		425	1,099	655
Balance at the end of the period	(10,511)		(10,146)	(10,511)	(10,146)
Accumulated Other Comprehensive Income (Loss)
Increase (decrease) in equity
Balance at the beginning of the period	(3,237)	(3,543)	(3,747)	(3,543)	(3,754)
Cumulative translation adjustment	225		(370)	473	(464)
Defined benefit pension and postretirement plans adjustment	53		48	129	98
Debt and equity securities - unrealized gain (loss)	(2)		1	(3)	2
Cash flow hedging instruments - unrealized gain (loss)			40	(17)	63
Purchase of subsidiary shares and transfers from noncontrolling interest			12		39
Balance at the end of the period	(2,961)		(4,016)	(2,961)	(4,016)
Noncontrolling Interest
Increase (decrease) in equity
Balance at the beginning of the period	393	354	285	354	538
Net income	17		19	39	44
Cumulative translation adjustment	9		12	3	11
Defined benefit pension and postretirement plans adjustment	1			1	1
Business combination allocation to noncontrolling interest				56
Purchase and sale of subsidiary shares - net	(8)			(41)
Purchase of subsidiary shares and transfers from noncontrolling interest			(24)		(302)
Balance at the end of the period	$ 412		$ 292	$ 412	$ 292