Consolidated Statement of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance at the beginning of the period at Dec. 31, 2011	$ 15,862	$ 3,776	$ 28,348	$ (11,679)	$ (5,025)	$ 442
Increase (decrease) in equity
Net income	4,511		4,444			67
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	71				116	(45)
Defined benefit pension and postretirement plans adjustment	201				200	1
Debt and equity securities - unrealized gain (loss)	4				4	0
Cash flow hedging instruments - unrealized gain (loss)	(45)				(45)	0
Total other comprehensive income (loss), net of tax	231
Dividends declared ($2.36, $3.395 (See Note 5) and $3.59 (See Note 5) per share for 2012, 2013 and 2014)	(1,635)		(1,635)
Stock-based compensation, net of tax impacts	277	277
Reacquired stock	(2,220)			(2,220)
Issuances pursuant to stock option and benefit plans	1,014		(478)	1,492
Balance at the end of the period at Dec. 31, 2012	18,040	4,053	30,679	(12,407)	(4,750)	465
Increase (decrease) in equity
Net income	4,721		4,659			62
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(505)				(418)	(87)
Defined benefit pension and postretirement plans adjustment	1,245				1,240	5
Debt and equity securities - unrealized gain (loss)	0				0	0
Cash flow hedging instruments - unrealized gain (loss)	15				15	0
Total other comprehensive income (loss), net of tax	755
Dividends declared ($2.36, $3.395 (See Note 5) and $3.59 (See Note 5) per share for 2012, 2013 and 2014)	(2,297)		(2,297)
Sale of subsidiary shares	8	7				1
Stock-based compensation, net of tax impacts	324	324
Reacquired stock	(5,216)			(5,216)
Issuances pursuant to stock option and benefit plans	1,613		(625)	2,238
Balance at the end of the period at Dec. 31, 2013	17,948	4,384	32,416	(15,385)	(3,913)	446
Increase (decrease) in equity
Net income	4,998		4,956			42
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	(942)				(948)	6
Defined benefit pension and postretirement plans adjustment	(1,562)				(1,562)	0
Debt and equity securities - unrealized gain (loss)	2				2	0
Cash flow hedging instruments - unrealized gain (loss)	107				107	0
Total other comprehensive income (loss), net of tax	(2,395)
Dividends declared ($2.36, $3.395 (See Note 5) and $3.59 (See Note 5) per share for 2012, 2013 and 2014)	(2,297)		(2,297)
Purchase of subsidiary shares	(870)	(434)			25	(461)
Stock-based compensation, net of tax impacts	438	438
Reacquired stock	(5,643)			(5,643)
Issuances pursuant to stock option and benefit plans	963		(758)	1,721
Balance at the end of the period at Dec. 31, 2014	$ 13,142	$ 4,388	$ 34,317	$ (19,307)	$ (6,289)	$ 33