Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 2,219	$ 3,377
Marketable securities - current	1,461	1,101
Accounts receivable - net of allowances of $108 and $98	3,867	3,615
Inventories
Finished goods	1,536	1,476
Work in process	1,061	950
Raw materials and supplies	819	729
Total inventories	3,416	3,155
Other current assets	1,277	967
Total current assets	12,240	12,215
Marketable securities - non-current	896	540
Investments	155	146
Property, plant and equipment	21,166	20,253
Less: Accumulated depreciation	(13,500)	(12,974)
Property, plant and equipment - net	7,666	7,279
Goodwill	7,047	6,820
Intangible assets - net	1,916	1,820
Prepaid pension benefits	40	74
Other assets	1,656	1,262
Total assets	31,616	30,156
Current liabilities
Short-term borrowings and current portion of long-term debt	682	1,269
Accounts payable	1,643	1,662
Accrued payroll	676	778
Accrued income taxes	355	358
Other current liabilities	2,085	2,022
Total current liabilities	5,441	6,089
Long-term debt	4,484	4,183
Pension and postretirement benefits	3,972	2,013
Other liabilities	1,857	1,854
Total liabilities	15,754	14,139
Commitments and contingencies (Note 14)
3M Company shareholders' equity:
Common stock par value, $.01 par value, Shares outstanding - 2011: 694,970,041; Shares outstanding - 2010: 711,977,608	9	9
Additional paid-in capital	3,767	3,468
Retained earnings	28,348	25,995
Treasury stock	(11,679)	(10,266)
Accumulated other comprehensive income (loss)	(5,025)	(3,543)
Total 3M Company shareholders' equity	15,420	15,663
Noncontrolling interest	442	354
Total equity	15,862	16,017
Total liabilities and equity	$ 31,616	$ 30,156