Consolidated Balance Sheet (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 1,791	$ 1,897
Marketable securities - current	1,018	626
Accounts receivable - net	4,408	4,238
Inventories
Finished goods	1,713	1,723
Work in process	1,116	1,081
Raw materials and supplies	875	902
Total inventories	3,704	3,706
Other current assets	1,597	1,298
Total current assets	12,518	11,765
Marketable securities - non-current	13	828
Investments	102	102
Property, plant and equipment	22,473	22,841
Less: Accumulated depreciation	(14,187)	(14,352)
Property, plant and equipment - net	8,286	8,489
Goodwill	6,934	7,050
Intangible assets - net	1,396	1,435
Prepaid pension benefits	56	46
Other assets	1,338	1,554
Total assets	30,643	31,269
Current liabilities
Short-term borrowings and current portion of long-term debt	132	106
Accounts payable	1,801	1,807
Accrued payroll	446	732
Accrued income taxes	464	435
Other current liabilities	2,239	2,918
Total current liabilities	5,082	5,998
Long-term debt	6,459	6,731
Pension and postretirement benefits	3,764	3,843
Other liabilities	1,386	1,555
Total liabilities	16,691	18,127
Commitments and contingencies (Note 10)
3M Company shareholders' equity:
Common stock par value, $.01 par value, 944,033,056 shared issued	9	9
Additional paid-in capital	4,607	4,379
Retained earnings	35,080	34,317
Treasury stock, at cost: 309,692,081 shares at March 31, 2015; 308,898,462 shares at December 31, 2014	(19,458)	(19,307)
Accumulated other comprehensive income (loss)	(6,321)	(6,289)
Total 3M Company shareholders' equity	13,917	13,109
Noncontrolling interest	35	33
Total equity	13,952	13,142
Total liabilities and equity	$ 30,643	$ 31,269