Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 1,897	$ 2,581
Marketable securities - current	626	756
Accounts receivable - net of allowances of $94 and $104	4,238	4,253
Inventories
Finished goods	1,723	1,790
Work in process	1,081	1,139
Raw materials and supplies	902	935
Total inventories	3,706	3,864
Other current assets	1,298	1,279
Total current assets	11,765	12,733
Marketable securities - non-current	828	1,453
Investments	102	122
Property, plant and equipment	22,841	23,068
Less: Accumulated depreciation	(14,352)	(14,416)
Property, plant and equipment - net	8,489	8,652
Goodwill	7,050	7,345
Intangible assets - net	1,435	1,688
Prepaid pension benefits	46	577
Other assets	1,554	980
Total assets	31,269	33,550
Current liabilities
Short-term borrowings and current portion of long-term debt	106	1,683
Accounts payable	1,807	1,799
Accrued payroll	732	708
Accrued income taxes	435	417
Other current liabilities	2,918	2,891
Total current liabilities	5,998	7,498
Long-term debt	6,731	4,326
Pension and postretirement benefits	3,843	1,794
Other liabilities	1,555	1,984
Total liabilities	18,127	15,602
Commitments and contingencies (Note 13)
3M Company shareholders' equity:
Common stock par value, $.01 per share, Shares outstanding - 2014: 635,134,594; Shares outstanding - 2013: 663,296,239	9	9
Additional paid-in capital	4,379	4,375
Retained earnings	34,317	32,416
Treasury stock	(19,307)	(15,385)
Accumulated other comprehensive income (loss)	(6,289)	(3,913)
Total 3M Company shareholders' equity	13,109	17,502
Noncontrolling interest	33	446
Total equity	13,142	17,948
Total liabilities and equity	$ 31,269	$ 33,550