Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 2,928	$ 2,883
Marketable securities - current	1,448	1,648
Accounts receivable - net	4,418	4,061
Inventories
Finished goods	1,775	1,754
Work in process	1,179	1,186
Raw materials and supplies	865	897
Total inventories	3,819	3,837
Other current assets	1,242	1,201
Total current assets	13,855	13,630
Marketable securities - non-current	1,452	1,162
Investments	161	163
Property, plant and equipment	22,468	22,525
Less: Accumulated depreciation	(14,150)	(14,147)
Property, plant and equipment - net	8,318	8,378
Goodwill	7,247	7,385
Intangible assets - net	1,840	1,925
Prepaid pension benefits	19	16
Other assets	1,137	1,217
Total assets	34,029	33,876
Current liabilities
Short-term borrowings and current portion of long-term debt	1,072	1,085
Accounts payable	1,820	1,762
Accrued payroll	466	701
Accrued income taxes	392	371
Other current liabilities	2,187	2,281
Total current liabilities	5,937	6,200
Long-term debt	4,864	4,916
Pension and postretirement benefits	3,014	3,086
Other liabilities	1,686	1,634
Total liabilities	15,501	15,836
Commitments and contingencies (Note 10)
3M Company shareholders' equity:
Common stock par value, $.01 par value, 944,033,056 shares issued	9	9
Additional paid-in capital	4,179	4,044
Retained earnings	31,073	30,679
Treasury stock, at cost: 253,838,436 shares at March 31, 2013; 256,941,406 shares at December 31, 2012	(12,178)	(12,407)
Accumulated other comprehensive income (loss)	(5,001)	(4,750)
Total 3M Company shareholders' equity	18,082	17,575
Noncontrolling interest	446	465
Total equity	18,528	18,040
Total liabilities and equity	$ 34,029	$ 33,876