3M (MMM) 10-K 12 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	3M CO
Entity Central Index Key	66740
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Well Known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$103	$92.80
Entity Common Stock, Shares Outstanding		634,749,706
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net sales	$31,821	$30,871	$29,904
Operating expenses
Cost of sales	16,447	16,106	15,685
Selling, general and administrative expenses	6,469	6,384	6,102
Research, development and related expenses	1,770	1,715	1,634
Total operating expenses	24,686	24,205	23,421
Operating income	7,135	6,666	6,483
Interest expense and income
Interest expense	142	145	171
Interest income	-33	-41	-39
Total interest expense - net	109	104	132
Income before income taxes	7,026	6,562	6,351
Provision for income taxes	2,028	1,841	1,840
Net income including noncontrolling interest	4,998	4,721	4,511
Less: Net income attributable to noncontrolling interest	42	62	67
Net income attributable to 3M	$4,956	$4,659	$4,444
Weighted average 3M common shares outstanding - basic (in shares)	649.2	681.9	693.9
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$7.63	$6.83	$6.40
Weighted average 3M common shares outstanding - diluted (in shares)	662	693.6	703.3
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$7.49	$6.72	$6.32
Cash dividends paid per 3M common share (in dollars per share)	$3.42	$2.54	$2.36

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income including noncontrolling interest	$4,998	$4,721	$4,511
Other comprehensive income (loss), net of tax:
Cumulative translation adjustment	-942	-505	71
Defined benefit pension and postretirement plans adjustment	-1,562	1,245	201
Debt and equity securities - unrealized gain (loss)	2	0	4
Cash flow hedging instruments - unrealized gain (loss)	107	15	-45
Total other comprehensive income (loss), net of tax	-2,395	755	231
Comprehensive income (loss) including noncontrolling interest	2,603	5,476	4,742
Comprehensive (income) loss attributable to noncontrolling interest	-48	20	-23
Comprehensive income (loss) attributable to 3M	$2,555	$5,496	$4,719

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
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

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Consolidated Balance Sheet
Common stock, par value per share (in dollars per share)	$0.01	$0.01
Common stock, shares issued (in shares)	944,033,056
Treasury stock (in shares)	308,898,462	280,736,817
Allowances for doubtful accounts receivable	$94	$104
Common stock, Shares outstanding (in shares)	635,134,594	663,296,239

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Equity (USD $)	Total	Common Stock and Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
In Millions, unless otherwise specified
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

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Equity (Parenthetical) (USD $)	1 Months Ended		3 Months Ended			12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statement of Changes in Equity
Dividends that have been declared but not yet paid (in dollars per share)	$1.02	$0.86
Dividends declared in current period (in dollars per share)			$0.86	$0.86	$0.86	$3.59	$3.40	$2.36

Supplemental_Share_Information

Supplemental Share Information	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Share Information Treasury Stock RollForward
Treasury Stock, Shares, Beginning Balance	280,736,817	256,941,406	249,063,015
Reacquired stock	40,664,061	45,445,610	25,054,207
Issuances pursuant to stock options and benefit plans	-12,502,416	-21,650,199	-17,175,816
Treasury Stock, Shares, Ending Balance	308,898,462	280,736,817	256,941,406

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income including noncontrolling interest	$4,998	$4,721	$4,511
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities
Depreciation and amortization	1,408	1,371	1,288
Company pension and postretirement contributions	-215	-482	-1,146
Company pension and postretirement expense	391	553	650
Stock-based compensation expense	280	240	223
Deferred income taxes	-146	-167	33
Excess tax benefits from stock-based compensation	-167	-92	-62
Changes in assets and liabilities
Accounts receivable	-268	-337	-133
Inventories	-113	-86	-251
Accounts payable	75	16	72
Accrued income taxes (current and long-term)	206	206	90
Other - net	177	-126	25
Net cash provided by operating activities	6,626	5,817	5,300
Cash Flows from Investing Activities
Purchases of property, plant and equipment (PP&E)	-1,493	-1,665	-1,484
Proceeds from sale of PP&E and other assets	135	128	41
Acquisitions, net of cash acquired	-94	0	-1,046
Purchases of marketable securities and investments	-1,280	-4,040	-5,492
Proceeds from maturities and sale of marketable securities and investments	2,034	4,667	5,281
Proceeds from sale of businesses	0	8	0
Other investing	102	46	14
Net cash used in investing activities	-596	-856	-2,686
Cash Flows from Financing Activities
Change in short-term debt - net	27	-2	-36
Repayment of debt (maturities greater than 90 days)	-1,625	-859	-612
Proceeds from debt (maturities greater than 90 days)	2,608	824	1,370
Purchases of treasury stock	-5,652	-5,212	-2,204
Proceeds from issuance of treasury stock pursuant to stock option and benefit plans	968	1,609	1,012
Dividends paid to shareholders	-2,216	-1,730	-1,635
Excess tax benefits from stock-based compensation	167	92	62
Purchase of noncontrolling interest	-861	0	0
Other - net	-19	32	-15
Net cash used in financing activities	-6,603	-5,246	-2,058
Effect of exchange rate changes on cash and cash equivalents	-111	-17	108
Net increase (decrease) in cash and cash equivalents	-684	-302	664
Cash and cash equivalents at beginning of year	2,581	2,883	2,219
Cash and cash equivalents at end of period	$1,897	$2,581	$2,883

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Significant Accounting Policies
Significant Accounting Policies	NOTE 1. Significant Accounting Policies
	Consolidation: 3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products. All subsidiaries are consolidated. All significant intercompany transactions are eliminated. As used herein, the term “3M” or “Company” refers to 3M Company and subsidiaries unless the context indicates otherwise.
	Foreign currency translation: Local currencies generally are considered the functional currencies outside the United States. Assets and liabilities for operations in local-currency environments are translated at month-end exchange rates of the period reported. Income and expense items are translated at month-end exchange rates of each applicable month. Cumulative translation adjustments are recorded as a component of accumulated other comprehensive income (loss) in shareholders' equity.
	Although local currencies are typically considered as the functional currencies outside the United States, under Accounting Standards Codification (ASC) 830, Foreign Currency Matters, the reporting currency of a foreign entity's parent is assumed to be that entity's functional currency when the economic environment of a foreign entity is highly inflationary—generally when its cumulative inflation is approximately 100 percent or more for the three years that precede the beginning of a reporting period. 3M has a subsidiary in Venezuela with operating income representing less than 1.0 percent of 3M's consolidated operating income for 2014. 3M has determined that the cumulative inflation rate of Venezuela has exceeded, and continues to exceed, 100 percent since November 2009. Accordingly, since January 1, 2010, the financial statements of the Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent.
	The Venezuelan government sets official rates of exchange and conditions precedent to purchase foreign currency at these rates with local currency. Such rates and conditions are subject to change. For the periods presented through January 2013, this rate was set under the Transaction System for Foreign Currency Denominated Securities (SITME). In February 2013, the Venezuelan government announced a devaluation of its currency and the elimination of the SITME market. As a result, the official exchange rate controlled by the Commission for the Administration of Foreign Exchange (CADIVI) changed to a rate less favorable than the previous SITME rate.
	In January 2014, the Venezuelan government announced that a new agency, the National Center for Foreign Commerce (CENCOEX), had assumed the previous role of CADIVI with respect to the continuation of the existing official exchange rate; significantly expanded the use of a second foreign exchange mechanism called the Complementary System for Foreign Currency Acquirement (or SICAD1); and issued exchange regulations indicating the SICAD1 rate of exchange would be used for payments related to international investments. The SICAD1 exchange mechanism, a complementary currency auction system, had previously been created for purchases of foreign currency by only certain eligible importers and tourists. The government had begun publishing the SICAD1 rate resulting from currency auctions in December 2013. In late March 2014, the Venezuelan government launched a third foreign exchange mechanism, SICAD2, which relies on U.S. dollar cash and U.S. dollar denominated bonds offered by the Venezuelan Central Bank, PDVSA (the Venezuelan national oil and gas company) and certain private companies. SICAD2 was announced as being available to all industry sectors and that its use would not be restricted as to purpose.
	Since January 1, 2010, as discussed above, the financial statements of 3M's Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent. For the periods presented, this remeasurement utilized the SITME rate through January 2013, the official CADIVI/CENCOEX rate beginning in February 2013, the SICAD1 rate beginning in March 2014, and the SICAD2 rate beginning in June 2014. 3M's use of SICAD1 and subsequently SICAD2 was based upon evaluation of a number of factors including, but not limited to, the exchange rate the Company's Venezuelan subsidiary may legally use to convert currency, settle transactions or pay dividends; the probability of accessing and obtaining currency by use of a particular rate or mechanism; and the Company's intent and ability to use a particular exchange mechanism. Other factors notwithstanding, the elimination of the SITME rate and use of the CADIVI/CENCOEX exchange rate beginning in February 2013, use of the SICAD1 rate beginning in March 2014, and use of the SICAD2 rate beginning in June 2014 did not have a material impact on 3M's consolidated results of operations or financial condition.
	The Company continues to monitor circumstances relative to its Venezuelan subsidiary. Changes in applicable exchange rates or exchange mechanisms may continue in the future. These changes could impact the rate of exchange applicable to remeasure the Company's net monetary assets (liabilities) denominated in Venezuelan Bolivars (VEF). As of December 31, 2014, the Company had a balance of net monetary liabilities denominated in VEF of less than 150 million VEF and the SICAD1 and SICAD2 exchange rates were approximately 10 VEF and 50 VEF per U.S. dollar, respectively. Had 3M utilized the SICAD1 rate rather than the SICAD2 rate of exchange for remeasurement of such items as of December 31, 2014, the differential would not have had a material impact on 3M's consolidated results of operations or financial condition.
	A need to deconsolidate the Company's Venezuelan subsidiary's operations may result from a lack of exchangeability of VEF-denominated cash coupled with an acute degradation in the ability to make key operational decisions due to government regulations in Venezuela. 3M monitors factors such as its ability to access various exchange mechanisms; the impact of government regulations on the Company's ability to manage its Venezuelan subsidiary's capital structure, purchasing, product pricing, and labor relations; and the current political and economic situation within Venezuela. Based upon such factors as of December 31, 2014, the Company continues to consolidate its Venezuelan subsidiary. As of December 31, 2014, the balance of intercompany receivables due from this subsidiary is less than $20 million and its equity balance is not significant.
	Reclassifications: Certain amounts in the prior years' consolidated financial statements have been reclassified to conform to the current year presentation.
	Use of estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
	Cash and cash equivalents: Cash and cash equivalents consist of cash and temporary investments with maturities of three months or less when acquired.
	Marketable securities: The classification of marketable securities as current or non-current is dependent upon management's intended holding period, the security's maturity date and liquidity considerations based on market conditions. If management intends to hold the securities for longer than one year as of the balance sheet date, they are classified as non-current. 3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders' equity. Such an unrealized loss does not reduce net income for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.
	Investments: Investments primarily include equity method, cost method, and available-for-sale equity investments. Available-for-sale investments are recorded at fair value. Unrealized gains and losses relating to investments classified as available-for-sale are recorded as a component of accumulated other comprehensive income (loss) in shareholders' equity.
	Other assets: Other assets include deferred income taxes, product and other insurance receivables, the cash surrender value of life insurance policies, and other long-term assets. Investments in life insurance are reported at the amount that could be realized under contract at the balance sheet date, with any changes in cash surrender value or contract value during the period accounted for as an adjustment of premiums paid. Cash outflows and inflows associated with life insurance activity are included in “Purchases of marketable securities and investments” and “Proceeds from maturities and sale of marketable securities and investments,” respectively.
	Inventories: Inventories are stated at the lower of cost or market, with cost generally determined on a first-in, first-out basis.
	Property, plant and equipment: Property, plant and equipment, including capitalized interest and internal engineering costs, are recorded at cost. Depreciation of property, plant and equipment generally is computed using the straight-line method based on the estimated useful lives of the assets. The estimated useful lives of buildings and improvements primarily range from ten to forty years, with the majority in the range of twenty to forty years. The estimated useful lives of machinery and equipment primarily range from three to fifteen years, with the majority in the range of five to ten years. Fully depreciated assets are retained in property and accumulated depreciation accounts until disposal. Upon disposal, assets and related accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposal, is charged or credited to operations. Property, plant and equipment amounts are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss would be recognized when the carrying amount of an asset exceeds the estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition. The amount of the impairment loss recorded is calculated by the excess of the asset's carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.
	Conditional asset retirement obligations: A liability is initially recorded at fair value for an asset retirement obligation associated with the retirement of tangible long-lived assets in the period in which it is incurred if a reasonable estimate of fair value can be made. Conditional asset retirement obligations exist for certain long-term assets of the Company. The obligation is initially measured at fair value using expected present value techniques. Over time the liabilities are accreted for the change in their present value and the initial capitalized costs are depreciated over the remaining useful lives of the related assets. The asset retirement obligation liability was $96 million and $90 million at December 31, 2014 and 2013, respectively.
	Goodwill: Goodwill is the excess of cost of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and is tested for impairment between annual tests if an event occurs or circumstances change that would indicate the carrying amount may be impaired. Impairment testing for goodwill is done at a reporting unit level, with all goodwill assigned to a reporting unit. Reporting units are one level below the business segment level, but can be combined when reporting units within the same segment have similar economic characteristics. 3M did not combine any of its reporting units for impairment testing. An impairment loss generally would be recognized when the carrying amount of the reporting unit's net assets exceeds the estimated fair value of the reporting unit. The estimated fair value of a reporting unit is determined using earnings for the reporting unit multiplied by a price/earnings ratio for comparable industry groups, or by using a discounted cash flow analysis. Companies have the option to first assess qualitative factors to determine whether the fair value of a reporting unit is not “more likely than not” less than its carrying amount, which is commonly referred to as “Step 0”. 3M has chosen not to apply Step 0 for 2014 or prior.
	Intangible assets: Intangible asset types include customer related, patents, other technology-based, tradenames and other intangible assets acquired from an independent party. Intangible assets with a definite life are amortized over a period ranging from one to twenty years on a systematic and rational basis (generally straight line) that is representative of the asset's use. The estimated useful lives vary by category, with customer related largely between two to ten years, patents largely between five to ten years, other technology-based largely between five to twelve years, definite lived tradenames largely between two and twenty years, and other intangibles largely between two to ten years. Costs related to internally developed intangible assets, such as patents, are expensed as incurred, primarily in “Research, development and related expenses.”
	Intangible assets with a definite life are tested for impairment whenever events or circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss is recognized when the carrying amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair value of the asset. The amount of the impairment loss recorded is calculated by the excess of the asset's carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.
	Intangible assets with an indefinite life, namely certain tradenames, are not amortized. Indefinite-lived intangible assets are tested for impairment annually, and are tested for impairment between annual tests if an event occurs or circumstances change that would indicate that the carrying amount may be impaired. An impairment loss generally would be recognized when the fair value is less than the carrying value of the indefinite-lived intangible asset.
	Restructuring actions: Restructuring actions generally include significant actions involving employee-related severance charges, contract termination costs, and impairment of assets associated with such actions. Employee-related severance charges are largely based upon distributed employment policies and substantive severance plans. These charges are reflected in the quarter when the actions are probable and the amounts are estimable, which typically is when management approves the associated actions. Severance amounts for which affected employees were required to render service in order to receive benefits at their termination dates were measured at the date such benefits were communicated to the applicable employees and recognized as expense over the employees' remaining service periods. Contract termination and other charges primarily reflect costs to terminate a contract before the end of its term (measured at fair value at the time the Company provided notice to the counterparty) or costs that will continue to be incurred under the contract for its remaining term without economic benefit to the Company. Asset impairment charges related to intangible assets and property, plant and equipment reflect the excess of the assets' carrying values over their fair values.
	Revenue (sales) recognition: The Company sells a wide range of products to a diversified base of customers around the world and has no material concentration of credit risk. Revenue is recognized when the risks and rewards of ownership have substantively transferred to customers. This condition normally is met when the product has been delivered or upon performance of services. The Company records estimated reductions to revenue or records expense for customer and distributor incentives, primarily comprised of rebates and free goods, at the time of the initial sale. These sales incentives are accounted for in accordance with ASC 605, Revenue Recognition. The estimated reductions of revenue for rebates are based on the sales terms, historical experience, trend analysis and projected market conditions in the various markets served. Since the Company serves numerous markets, the rebate programs offered vary across businesses, but the most common incentive relates to amounts paid or credited to customers for achieving defined volume levels or growth objectives. Free goods are accounted for as an expense and recorded in cost of sales. Sales, use, value-added and other excise taxes are not recognized in revenue.
	The vast majority of 3M's sales agreements are for standard products and services with customer acceptance occurring upon delivery of the product or performance of the service. However, to a limited extent 3M also enters into agreements that involve multiple elements (such as equipment, installation and service), software, or non-standard terms and conditions.
	For non-software multiple-element arrangements, in connection with 3M's adoption on a prospective basis of Accounting Standards Updated (ASU) No. 2009-13, Multiple-Deliverable Revenue Arrangements—a consensus of the FASB Emerging Issues Task Force, to new or materially modified arrangements beginning in 2011, the Company recognizes revenue for delivered elements when they have stand-alone value to the customer, they have been accepted by the customer, and for which there are only customary refund or return rights. Arrangement consideration is allocated to the deliverables by use of the relative selling price method. The selling price used for each deliverable is based on vendor-specific objective evidence (VSOE) if available, third-party evidence (TPE) if VSOE is not available, or estimated selling price if neither VSOE nor TPE is available. Estimated selling price is determined in a manner consistent with that used to establish the price to sell the deliverable on a standalone basis. For applicable pre-existing arrangements, 3M recognizes revenue for delivered elements when the fair values of the undelivered items are known and allocation of consideration to the delivered items is most often based on the residual method. In addition to the preceding conditions under ASU No. 2009-13 and for applicable pre-existing arrangements, equipment revenue is not recorded until the installation has been completed if equipment acceptance is dependent upon installation or if installation is essential to the functionality of the equipment. Installation revenues are not recorded until installation has been completed.
	For arrangements (or portions of arrangements) falling within software revenue recognition standards and that do not involve significant production, modification, or customization, revenue for each software or software-related element is recognized when the Company has VSOE of the fair value of all of the undelivered elements and applicable criteria have been met for the delivered elements. When the arrangements involve significant production, modification or customization, long-term construction-type accounting involving proportional performance is generally employed.
	For prepaid service contracts, sales revenue is recognized on a straight-line basis over the term of the contract, unless historical evidence indicates the costs are incurred on other than a straight-line basis. License fee revenue is recognized as earned, and no revenue is recognized until the inception of the license term.
	On occasion, agreements will contain milestones, or 3M will recognize revenue based on proportional performance. For these agreements, and depending on the specifics, 3M may recognize revenue upon completion of a substantive milestone, or in proportion to costs incurred to date compared with the estimate of total costs to be incurred.
	Accounts receivable and allowances: Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for bad debts, cash discounts, product returns and various other items. The allowance for doubtful accounts and product returns is based on the best estimate of the amount of probable credit losses in existing accounts receivable and anticipated sales returns. The Company determines the allowances based on historical write-off experience by industry and regional economic data and historical sales returns. The Company reviews the allowance for doubtful accounts monthly. The Company does not have any significant off-balance-sheet credit exposure related to its customers.
	Advertising and merchandising: These costs are charged to operations in the period incurred, and totaled $407 million in 2014, $423 million in 2013 and $482 million in 2012.
	Research, development and related expenses: These costs are charged to operations in the period incurred and are shown on a separate line of the Consolidated Statement of Income. Research, development and related expenses totaled $1.770 billion in 2014, $1.715 billion in 2013 and $1.634 billion in 2012. Research and development expenses, covering basic scientific research and the application of scientific advances in the development of new and improved products and their uses, totaled $1.193 billion in 2014, $1.150 billion in 2013 and $1.079 billion in 2012. Related expenses primarily include technical support provided by 3M to customers who are using existing 3M products; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.
	Internal-use software: The Company capitalizes direct costs of services used in the development of internal-use software. Amounts capitalized are amortized over a period of three to seven years, generally on a straight-line basis, unless another systematic and rational basis is more representative of the software's use. Amounts are reported as a component of either machinery and equipment or capital leases within property, plant and equipment.
	Environmental: Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities related to anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies, the Company's commitment to a plan of action, or approval by regulatory agencies. Environmental expenditures for capital projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.
	Income taxes: The provision for income taxes is determined using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. The Company records a valuation allowance to reduce its deferred tax assets when uncertainty regarding their realizability exists. As of December 31, 2014 and 2013, the Company had valuation allowances of $22 million and $23 million on its deferred tax assets, respectively. The Company recognizes and measures its uncertain tax positions based on the rules under ASC 740, Income Taxes.
	Earnings per share: The difference in the weighted average 3M shares outstanding for calculating basic and diluted earnings per share attributable to 3M common shareholders is the result of the dilution associated with the Company's stock-based compensation plans. Certain options outstanding under these stock-based compensation plans during the years 2014, 2013 and 2012 were not included in the computation of diluted earnings per share attributable to 3M common shareholders because they would not have had a dilutive effect (1.4 million average options for 2014, 2.0 million average options for 2013, and 12.6 million average options for 2012). The computations for basic and diluted earnings per share for the years ended December 31 follow:
	Earnings Per Share Computations
	(Amounts in millions, except per share amounts)			2014		2013		2012
	Numerator:
		Net income attributable to 3M		$	4,956	$	4,659	$	4,444
	Denominator:
		Denominator for weighted average 3M common shares
			outstanding – basic		649.2		681.9		693.9
		Dilution associated with the Company’s stock-based
			compensation plans		12.8		11.7		9.4
		Denominator for weighted average 3M common shares
			outstanding – diluted		662		693.6		703.3
	Earnings per share attributable to 3M common shareholders – basic			$	7.63	$	6.83	$	6.4
	Earnings per share attributable to 3M common shareholders – diluted			$	7.49	$	6.72	$	6.32
	Stock-based compensation: The Company recognizes compensation expense for its stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees' Stock Purchase Plan (GESPP). Under applicable accounting standards, the fair value of share-based compensation is determined at the grant date and the recognition of the related expense is recorded over the period in which the share-based compensation vests. Refer to Note 14 for additional information.
	Comprehensive income: Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the Consolidated Statement of Comprehensive Income and the Consolidated Statement of Changes in Equity. Accumulated other comprehensive income (loss) is composed of foreign currency translation effects (including hedges of net investments in international companies), defined benefit pension and postretirement plan adjustments, unrealized gains and losses on available-for-sale debt and equity securities, and unrealized gains and losses on cash flow hedging instruments.
	Derivatives and hedging activities: All derivative instruments within the scope of ASC 815, Derivatives and Hedging, are recorded on the balance sheet at fair value. The Company uses interest rate swaps, currency and commodity price swaps, and foreign currency forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity market volatility. All hedging instruments that qualify for hedge accounting are designated and effective as hedges, in accordance with U.S. generally accepted accounting principles. If the underlying hedged transaction ceases to exist, all changes in fair value of the related derivatives that have not been settled are recognized in current earnings. Instruments that do not qualify for hedge accounting are marked to market with changes recognized in current earnings. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the items subject to designated hedge or undesignated (economic) hedge relationships. The Company does not hold or issue derivative financial instruments for trading purposes and is not a party to leveraged derivatives.
	Credit risk: The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company's risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. The Company does not anticipate nonperformance by any of these counterparties. 3M has elected to present the fair value of derivative assets and liabilities within the Company's consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation.
	Fair value measurements: 3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.
	Acquisitions: The Company accounts for business acquisitions in accordance with ASC 805, Business Combinations. This standard requires the acquiring entity in a business combination to recognize all (and only) the assets acquired and liabilities assumed in the transaction and establishes the acquisition-date fair value as the measurement objective for all assets acquired and liabilities assumed in a business combination. Certain provisions of this standard prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.
	New Accounting Pronouncements
	In March 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-05, Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity. This standard provides additional guidance with respect to the reclassification into income of the cumulative translation adjustment (CTA) recorded in accumulated other comprehensive income associated with a foreign entity of a parent company. The ASU differentiates between transactions occurring within a foreign entity and transactions/events affecting an investment in a foreign entity. For transactions within a foreign entity, the full CTA associated with the foreign entity would be reclassified into income only when the sale of a subsidiary or group of net assets within the foreign entity represents the substantially complete liquidation of that foreign entity. For transactions/events affecting an investment in a foreign entity (for example, control or ownership of shares in a foreign entity), the full CTA associated with the foreign entity would be reclassified into income only if the parent no longer has a controlling interest in that foreign entity as a result of the transaction/event. In addition, acquisitions of a foreign entity completed in stages will trigger release of the CTA associated with an equity method investment in that entity at the point a controlling interest in the foreign entity is obtained. For 3M, this ASU was effective prospectively beginning January 1, 2014. This ASU had no immediate impact on 3M's consolidated results of operations and financial condition as the Company had no event/transaction as described above.
	In April 2014, the FASB issued ASU No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies related disclosure requirements. This standard will have the impact of reducing the frequency of disposals reported as discontinued operations, by requiring such a disposal to represent a strategic shift that has or will have a major effect on an entity's operations and financial results. However, existing provisions that prohibit an entity from reporting a discontinued operation if it has certain continuing cash flows or involvement with the component after disposal are eliminated by this standard. The ASU also expands the disclosures for discontinued operations and requires new disclosures related to individually significant disposals that do not qualify as discontinued operations. For 3M, this ASU is effective prospectively beginning January 1, 2015. Early adoption is, however, permitted. This ASU would impact 3M's consolidated results of operations and financial condition only in the instance of a disposal as described above.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which provides a single comprehensive model to be used in the accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The standard's stated core principle is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle the ASU includes provisions within a five step model that includes identifying the contract with a customer, identifying the performance obligations in the contract, determining the transaction price, allocating the transaction price to the performance obligations, and recognizing revenue when (or as) an entity satisfies a performance obligation. The standard also specifies the accounting for some costs to obtain or fulfill a contract with a customer and requires expanded disclosures about revenue recognition. The standard provides for either full retrospective adoption or a modified retrospective adoption by which it is applied only to the most current period presented. For 3M, this ASU is effective January 1, 2017. The Company is currently assessing this ASU's impact on 3M's consolidated results of operations and financial condition.

Acquisitions_and_Divestitures

Acquisitions and Divestitures	12 Months Ended
	Dec. 31, 2014
Acquisitions and Divestitures
Acquisitions and Divestitures	NOTE 2. Acquisitions and Divestitures
	3M makes acquisitions of certain businesses from time to time that are aligned with its strategic intent with respect to, among other factors, growth markets and adjacent product lines or technologies.
	3M completed one acquisition (Treo Solutions, LLC) during 2014, the impact of which on the consolidated balance sheet was not considered material. Separately, as discussed in Note 5, during 2014, 3M (via Sumitomo 3M Limited) purchased Sumitomo Electric Industries, Ltd.'s 25 percent interest in 3M's consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Because 3M already had a controlling interest in this consolidated subsidiary, this transaction was separately recorded as a financing activity in the statement of cash flows.
	There were no acquisitions that closed during 2013. Adjustments in 2013 to the preliminary purchase price allocations of other acquisitions within the allocation period were not material and primarily related to the 2012 acquisition of Ceradyne, Inc.
	In January 2015, 3M (Electronics and Energy Business) completed the sale of its global Static Control business to Desco Industries Inc., based in Chino, California. 2014 sales of this business were $46 million. This transaction was not considered material.
	The impact on the consolidated balance sheet of the purchase price allocations related to 2012 acquisitions, including adjustments relative to other acquisitions within the allocation period, follows. Adjustments in 2012 to the preliminary purchase price allocations of other acquisitions within the allocation period were not material and primarily related to the 2011 acquisitions of Winterthur Technologie AG and the business acquired from GPI Group.
		2012 Acquisition Activity
	(Millions)			Other		Total
	Asset (Liability)	Ceradyne, Inc.		Acquisitions
	Accounts receivable	$	55	$	29	$	84
	Inventory		112		13		125
	Other current assets		36		1		37
	Marketable securities		250		―		250
	Property, plant, and equipment		238		3		241
	Purchased finite-lived intangible assets		127		86		213
	Purchased indefinite-lived intangible assets		―		2		2
	Purchased goodwill		198		141		339
	Accounts payable and other liabilities, net of other assets		-100		-27		-127
	Interest bearing debt		-93		-3		-96
	Deferred tax asset/(liability)		-25		3		-22
	Net assets acquired	$	798	$	248	$	1,046
	Supplemental information:
	Cash paid	$	850	$	248	$	1,098
	Less: Cash acquired		52		―		52
	Cash paid, net of cash acquired	$	798	$	248	$	1,046
	Goodwill resulting from business combinations is largely attributable to the existing workforce of the acquired businesses and synergies expected to arise after 3M's acquisition of these businesses. In-process research and development associated with CodeRyte, Inc. is reflected in the preceding 2012 table as purchased indefinite-lived intangible assets. Pro forma information related to acquisitions was not included because the impact on the Company's consolidated results of operations was not considered to be material.
	In addition to business combinations, 3M periodically acquires certain tangible and/or intangible assets and purchases interests in certain enterprises that do not otherwise qualify for accounting as business combinations. These transactions are largely reflected as additional asset purchase and investment activity.
	2014 acquisitions:
	During 2014, 3M completed one business combination. The purchase price paid for this business combination (net of cash acquired) and the impact of other matters (net) during 2014 aggregated to $94 million.
	(1) In April 2014, 3M (Health Care Business) purchased all of the outstanding equity interests of Treo Solutions LLC, headquartered in Troy, New York. Treo Solutions LLC is a provider of data analytics and business intelligence to healthcare payers and providers.
	Purchased identifiable finite-lived intangible assets related to acquisition activity in 2014 totaled $34 million. The associated finite-lived intangible assets acquired in 2014 will be amortized on a systematic and rational basis (generally straight line) over a weighted-average life of six years (lives ranging from three to 10 years). Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material.
	2013 divestitures:
	In June 2013, 3M (Consumer Business) completed the sale of its Scientific Anglers and Ross Reels businesses to The Orvis Company, Inc. based in Manchester, Vermont. This transaction was not considered material.
	2012 acquisitions:
	During 2012, 3M completed three business combinations. The purchase price paid for these business combinations (net of cash acquired) and the impact of other matters (net) during 2012 aggregated to $1.046 billion.
	(1) In April 2012, 3M (Health Care Business) purchased all of the outstanding shares of CodeRyte, Inc., an industry leader in clinical natural processing technology and computer-assisted coding solutions for healthcare outpatient providers, which is headquartered in Bethesda, Maryland.
	(2) In September 2012, 3M (Safety and Graphics Business) purchased the net assets of Federal Signal Technologies Group from Federal Signal Corp., for a total purchase price of approximately $104 million. This business focuses on electronic toll collection and parking management hardware and software services, with primary facilities spread throughout the United States and in the U.K.
	(3) In November 2012, 3M (Industrial Business) purchased all of the outstanding shares of Ceradyne, Inc. (Ceradyne) for $798 million, net of cash acquired. The net assets acquired in this transaction included $250 million of marketable securities and $93 million of debt, as indicated in the preceding 2012 table. Ceradyne, headquartered in Costa Mesa, California, is involved in the development and production of advanced technical ceramics for demanding applications in the automotive, oil and gas, solar, industrial, electronics and defense industries.
	Purchased identifiable finite-lived intangible assets related to acquisition activity in 2012 totaled $213 million. The associated finite-lived intangible assets acquired in 2012 will be amortized on a systematic and rational basis (generally straight line) over a weighted-average life of 12 years (lives ranging from two to 20 years). Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets
Goodwill and Intangible Assets	NOTE 3. Goodwill and Intangible Assets
	Purchased goodwill from acquisitions totaled $65 million in 2014, none of which is deductible for tax purposes. There were no acquisitions that closed during 2013. The acquisition activity in the following table also includes the net impact of adjustments to the preliminary allocation of purchase price for prior year acquisitions, which increased goodwill by $10 million in 2013. The amounts in the “Translation and other” column in the following table primarily relate to changes in foreign currency exchange rates. The goodwill balance by business segment follows:
	Goodwill
				Dec. 31,			2013			2013			Dec. 31,			2014			2014		Dec. 31,
				2012			acquisition			translation			2013			acquisition			translation		2014
	(Millions)			Balance			activity			and other			Balance			activity			and other		Balance
	Industrial			$	2,174		$	10		$	-18		$	2,166		$	―		$	-129	$	2,037
	Safety and Graphics				1,751			―			-11			1,740			―			-90		1,650
	Electronics and Energy				1,622			―			-10			1,612			―			-53		1,559
	Health Care				1,598			―			-2			1,596			65			-72		1,589
	Consumer				240			―			-9			231			―			-16		215
	Total Company			$	7,385		$	10		$	-50		$	7,345		$	65		$	-360	$	7,050
	As discussed in Note 15, effective in the first quarter of 2014, 3M transferred a product line between divisions within different business segments, and in the first, second and fourth quarters of 2014 made other changes within business segments. For any product moves that resulted in reporting unit changes, the Company applied the relative fair value method to determine the impact on goodwill of the associated reporting units. During the first, second and fourth quarters of 2014, the Company completed its assessment of any potential goodwill impairment for reporting units impacted by this new structure and determined that no impairment existed. The Company also completed its annual goodwill impairment test in the fourth quarter of 2014 for all reporting units and determined that no impairment existed. In addition, the Company had no impairments of goodwill in prior years.
	Acquired Intangible Assets
	For 2014, the gross carrying amount of intangible assets (excluding goodwill) decreased due to changes in foreign currency exchange rates, partially offset by business combinations, which increased the gross carrying amount by $34 million. The gross carrying amount and accumulated amortization of acquired intangible assets as of December 31, follow:
	(Millions)		2014		2013
	Customer related intangible assets			$	1,348		$	1,411
	Patents				581			602
	Other technology-based intangible assets				407			406
	Definite-lived tradenames				401			411
	Other amortizable intangible assets				221			217
	Total gross carrying amount			$	2,958		$	3,047
	Accumulated amortization — customer related				-597			-514
	Accumulated amortization — patents				-472			-458
	Accumulated amortization — other technology based				-215			-179
	Accumulated amortization — definite-lived tradenames				-195			-178
	Accumulated amortization — other				-167			-159
	Total accumulated amortization			$	-1,646		$	-1,488
		Total finite-lived intangible assets — net		$	1,312		$	1,559
	Non-amortizable intangible assets (primarily tradenames)				123			129
		Total intangible assets — net		$	1,435		$	1,688
	3M has certain tradenames that are not amortized because of the long-time established name recognition in their respective industries.
	Amortization expense for the years ended December 31 follows:
	(Millions)			2014			2013			2012
	Amortization expense		$	228		$	236		$	233
	Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2014 follows:
												After
	(Millions)	2015		2016		2017		2018		2019		2019
	Amortization expense		$	204		$	176		$	154		$	139		$	128		$	511
	The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, changes in foreign currency exchange rates, impairment of intangible assets, accelerated amortization of intangible assets and other events. 3M expenses the costs incurred to renew or extend the term of intangible assets.

Supplemental_Balance_Sheet_Inf

Supplemental Balance Sheet Information	12 Months Ended
	Dec. 31, 2014
Supplemental Balance Sheet Information
Supplemental Balance Sheet Information	NOTE 4. Supplemental Balance Sheet Information
	Accounts payable (included as a separate line item in the Consolidated Balance Sheet) includes drafts payable on demand of $1 million at December 31, 2014, and $24 million at December 31, 2013. Accumulated depreciation for capital leases totaled $87 million and $85 million as of December 31, 2014, and 2013, respectively. Additional supplemental balance sheet information is provided in the table that follows.
	(Millions)		2014		2013
	Other current assets
	Prepaid expenses and other		$	595	$	602
	Deferred income taxes			444		502
	Derivative assets-current			182		76
	Insurance related receivables, prepaid expenses and other			77		99
		Total other current assets	$	1,298	$	1,279
	Investments
	Equity method		$	58	$	69
	Cost method			41		45
	Other investments			3		8
		Total investments	$	102	$	122
	Property, plant and equipment - at cost
	Land		$	368	$	411
	Buildings and leasehold improvements			6,943		7,062
	Machinery and equipment			14,684		14,665
	Construction in progress			679		772
	Capital leases			167		158
	Gross property, plant and equipment			22,841		23,068
	Accumulated depreciation			-14,352		-14,416
		Property, plant and equipment - net	$	8,489	$	8,652
	Other assets
	Deferred income taxes		$	889	$	360
	Insurance related receivables and other			89		96
	Cash surrender value of life insurance policies			245		236
	Other			331		288
		Total other assets	$	1,554	$	980
	Other current liabilities
	Accrued trade payables		$	533	$	547
	Deferred income			541		521
	Derivative liabilities			39		103
	Dividends payable			648		567
	Employee benefits and withholdings			172		195
	Contingent liability claims and other			157		119
	Property and other taxes			90		88
	Pension and postretirement benefits			60		61
	Deferred income taxes			34		37
	Other			644		653
		Total other current liabilities	$	2,918	$	2,891
	Other liabilities
	Long term income taxes payable		$	519	$	472
	Employee benefits			262		315
	Contingent liability claims and other			300		314
	Capital lease obligations			59		58
	Deferred income			21		19
	Deferred income taxes			141		538
	Other			253		268
		Total other liabilities	$	1,555	$	1,984

Supplemental_Equity_and_Compre

Supplemental Equity and Comprehensive Income Information	12 Months Ended
	Dec. 31, 2014
Supplemental Equity and Comprehensive Income Information
Supplemental Equity and Comprehensive Income Information	NOTE 5. Supplemental Equity and Comprehensive Income Information
	Common stock ($.01 par value per share) of 3.0 billion shares is authorized, with 944,033,056 shares issued. Treasury stock is reported at cost, with 308,898,462 shares at December 31, 2014, 280,736,817 shares at December 31, 2013, and 256,941,406 shares at December 31, 2012. Preferred stock, without par value, of 10 million shares is authorized but unissued.
	In December 2014, 3M's Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (payable in March 2015), which when added to second, third and fourth quarter 2014 declared dividends of $0.855 per share, resulted in total year 2014 declared dividends of $3.59 per share. In December 2013, 3M's Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March 2014). This resulted in total year 2013 declared dividends of $3.395 per share, with $2.54 per share paid in 2013 and the additional $0.855 per share paid in March 2014.
	Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component
	(Millions)				Cumulative Translation Adjustment			Defined Benefit Pension and Postretirement Plans Adjustment			Debt and Equity Securities, Unrealized Gain (Loss)		Cash Flow Hedging Instruments, Unrealized Gain (Loss)		Total Accumulated Other Comprehen-sive Income (Loss)
	Balance at December 31, 2011, net of tax				$	114		$	-5,155		$	-6	$	22	$	-5,025
	Other comprehensive income (loss),
		before tax:
		Amounts before reclassifications				133			-204			6		3		-62
		Amounts reclassified out				―			615			―		-72		543
	Total other comprehensive income (loss),
		before tax				133			411			6		-69		481
	Tax effect					-17			-211			-2		24		-206
	Total other comprehensive income (loss),
		net of tax				116			200			4		-45		275
	Balance at December 31, 2012, net of tax				$	230		$	-4,955		$	-2	$	-23	$	-4,750
	Other comprehensive income (loss),
		before tax:
		Amounts before reclassifications				-462			1,361			―		-98		801
		Amounts reclassified out				―			569			―		122		691
	Total other comprehensive income (loss),
		before tax				-462			1,930			―		24		1,492
	Tax effect					44			-690			―		-9		-655
	Total other comprehensive income (loss),
		net of tax				-418			1,240			―		15		837
	Balance at December 31, 2013, net of tax				$	-188		$	-3,715		$	-2	$	-8	$	-3,913
	Other comprehensive income (loss),
		before tax:
		Amounts before reclassifications				-856			-2,638			2		171		-3,321
		Amounts reclassified out				―			360			1		-4		357
	Total other comprehensive income (loss),
		before tax				-856			-2,278			3		167		-2,964
	Tax effect					-92			716			-1		-60		563
	Total other comprehensive income (loss),
		net of tax				-948			-1,562			2		107		-2,401
	Impact from purchase of subsidiary shares					41			-16			―		―		25
	Balance at December 31, 2014, net of tax				$	-1,095		$	-5,293		$	―	$	99	$	-6,289
	Income taxes are not provided for foreign translation relating to permanent investments in international subsidiaries, but tax effects within cumulative translation does include impacts from items such as net investment hedge transactions. Reclassification adjustments are made to avoid double counting in comprehensive income items that are also recorded as part of net income.
	Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
				Amount Reclassified from
	(Millions)			Accumulated Other Comprehensive Income								Location on Income Statement
	Details about Accumulated Other Comprehensive Income Components		Year ended December 31, 2014			Year ended December 31, 2013			Year ended December 31, 2012
	Gains (losses) associated with, defined benefit pension and postretirement plans amortization
		Transition asset	$	1		$	1		$	1		See Note 10
		Prior service benefit		59			77			84		See Note 10
		Net actuarial loss		-420			-647			-700		See Note 10
	Total before tax			-360			-569			-615
	Tax effect			122			197			219		Provision for income taxes
	Net of tax		$	-238		$	-372		$	-396
	Debt and equity security gains (losses)
		Sales or impairments of securities	$	-1		$	―		$	―		Selling, general and administrative expenses
	Total before tax			-1			―			―
	Tax effect			―			―			―		Provision for income taxes
	Net of tax		$	-1		$	―		$	―
	Cash flow hedging instruments gains (losses)
		Foreign currency forward/option contracts	$	3		$	-11		$	41		Cost of sales
		Foreign currency forward contracts		―			-108			42		Interest expense
		Commodity price swap contracts		2			-2			-10		Cost of sales
		Interest rate swap contracts		-1			-1			-1		Interest expense
	Total before tax			4			-122			72
	Tax effect			-1			45			-26		Provision for income taxes
	Net of tax		$	3		$	-77		$	46
	Total reclassifications for the period, net of tax		$	-236		$	-449		$	-350
	Purchase and Sale of Subsidiary Shares
On September 1, 2014, 3M (via Sumitomo 3M Limited) purchased Sumitomo Electric Industries, Ltd.'s 25 percent interest in 3M's consolidated Sumitomo 3M Limited subsidiary for 90 billion Japanese Yen. Upon completion of the transaction, 3M owned 100 percent of Sumitomo 3M Limited. This transaction was recorded as a financing activity (Purchase of noncontrolling interest) in the statement of cash flows.
In April 2014, 3M purchased the remaining noncontrolling interest in a consolidated 3M subsidiary for an immaterial amount, which was classified as a financing activity (Purchase of noncontrolling interest) in the consolidated statement of cash flows.
The following table summarizes the effects of these 2014 transactions on equity attributable to 3M Company shareholders.
(Millions)		Year ended December 31, 2014
Net income attributable to 3M		$	4,956
Impact of purchase of subsidiary shares			-409
Change in 3M Company shareholders’ equity from net income attributable to 3M and
	impact of purchase of subsidiary shares	$	4,547
In March 2013, 3M sold shares in 3M India Limited, a subsidiary of the Company, in return for $8 million. The noncontrolling interest shares of this subsidiary trade on a public exchange in India. This sale of shares complied with an amendment to Indian securities regulations that required 3M India Limited, as a listed company, to achieve a minimum public shareholding of at least 25 percent. As a result of this transaction, 3M's ownership in 3M India Limited was reduced from 76 percent to 75 percent. The $8 million received in the first quarter of 2013 was classified as other financing activity in the consolidated statement of cash flows. Because the Company retained its controlling interest, the sale resulted in an increase in 3M Company shareholder's equity of $7 million and an increase in noncontrolling interest of $1 million.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Elements
Supplemental Cash Flow Information	NOTE 6. Supplemental Cash Flow Information
	(Millions)	2014		2013		2012
	Cash income tax payments, net of refunds	$	1,968	$	1,803	$	1,717
	Cash interest payments		178		169		166
	Capitalized interest		15		21		23
	Cash interest payments include interest paid on debt and capital lease balances, including net interest payments/receipts related to accreted debt discounts/premiums, as well as net interest payments/receipts associated with interest rate swap contracts.
	Individual amounts in the Consolidated Statement of Cash Flows exclude the impacts of acquisitions, divestitures and exchange rate impacts, which are presented separately.
	Transactions related to investing and financing activities with significant non-cash components are as follows:
	During the fourth quarter of 2014, 3M sold and leased-back, under a capital lease, certain recently constructed machinery and equipment in return for a municipal bond with the City of Nevada, Missouri valued at approximately $15 million as of the transaction date.
	During the third quarter of 2013, 3M sold its equity interest in a non-strategic investment in exchange for a note receivable of approximately $24 million, which is considered non-cash investing activity. As a result of this transaction, in the third quarter of 2013, 3M recorded a pre-tax gain of $18 million in its Health Care business segment. In October 2013, cash was received for the note receivable and is reflected in other investing activity in the consolidated statement of cash flows for the total year 2013.
	During the second quarter of 2013, the Company's Sumitomo 3M Limited subsidiary moved its administrative headquarters to a new leased location and sold the former site under an installment sale arrangement. As a result, at the time of the closing of the sale transaction, the Company received certain cash proceeds (included in proceeds from sale of property, plant and equipment in the consolidated statement of cash flows) and recorded a note receivable (due in quarterly installments through the first quarter of 2016) of $78 million and deferred profit of $49 million (both based on the foreign currency exchange rate at the time of closing). Remaining quarterly installments are due through the first quarter of 2016 and will be included in other investing activities in the consolidated statement of cash flows. Deferred profit is reduced and recognized into income in connection with such quarterly installments.
	In addition, as discussed in Note 5, in the fourth quarter of 2014, 3M's Board of Directors declared a first-quarter 2015 dividend of $1.025 per share (payable in March 2015), which reduced 3M's stockholders equity and increased other current liabilities as of December 2014 by $648 million. In the fourth quarter of 2013, 3M's Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (paid in March 2014). This reduced 3M's stockholders equity and increased other current liabilities as of December 31, 2013 by $567 million.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Taxes
Income Taxes	NOTE 7. Income Taxes
	Income Before Income Taxes
	(Millions)			2014			2013			2012
	United States			$	3,815		$	3,194		$	2,902
	International				3,211			3,368			3,449
		Total		$	7,026		$	6,562		$	6,351
	Provision for Income Taxes
	(Millions)				2014			2013			2012
	Currently payable
		Federal			$	1,103		$	948		$	743
		State				108			91			75
		International				1,008			901			918
	Deferred
		Federal				-171			-123			-3
		State				-9			-2			10
		International				-11			26			97
			Total		$	2,028		$	1,841		$	1,840
	Components of Deferred Tax Assets and Liabilities
	(Millions)				2014			2013
	Deferred tax assets:
		Accruals not currently deductible
			Employee benefit costs		$	148		$	140
			Product and other claims			152			155
			Miscellaneous accruals			137			130
		Pension costs				1,312			447
		Stock-based compensation				290			322
		Net operating/capital loss carryforwards				175			225
		Foreign tax credits				360			316
		Inventory				221			221
	Gross deferred tax assets					2,795			1,956
	Valuation allowance					-22			-23
	Total deferred tax assets				$	2,773		$	1,933
	Deferred tax liabilities:
		Product and other insurance receivables			$	-31		$	-46
		Accelerated depreciation				-804			-813
		Intangible amortization				-719			-780
		Other				-61			-7
	Total deferred tax liabilities				$	-1,615		$	-1,646
	Net deferred tax assets				$	1,158		$	287
	The net deferred tax assets are included as components of Other Current Assets, Other Assets, Other Current Liabilities, and Other Liabilities within the Consolidated Balance Sheet. See Note 4 “Supplemental Balance Sheet Information” for further details.
	As of December 31, 2014, the Company had tax effected operating loss, capital loss, and tax credit carryovers for federal (approximately $24 million), state (approximately $3 million), and international (approximately $148 million), with all amounts before valuation allowances. The federal tax attribute carryovers will expire after 15 to 16 years, the state after five to 10 years, and the majority of international after five years with the remaining international expiring in one year or with an indefinite carryover period. The tax attributes being carried over arise as certain jurisdictions may have tax losses or may have inabilities to utilize certain losses without the same type of taxable income. As of December 31, 2014, the Company has provided $22 million of valuation allowance against certain of these deferred tax assets based on management's determination that it is more-likely-than-not that the tax benefits related to these assets will not be realized.
	Reconciliation of Effective Income Tax Rate
				2014			2013			2012
	Statutory U.S. tax rate			35	%		35	%		35	%
	State income taxes - net of federal benefit			0.9			0.9			0.9
	International income taxes - net			-5.8			-6.3			-4.2
	U.S. research and development credit			-0.4			-0.7			-
	Reserves for tax contingencies			0.6			1.2			-1.9
	Domestic Manufacturer's deduction			-1.3			-1.6			-1.2
	All other - net			-0.1			-0.4			0.4
		Effective worldwide tax rate		28.9	%		28.1	%		29	%
	The effective tax rate for 2014 was 28.9 percent, compared to 28.1 percent in 2013, an increase of 0.8 percentage points, impacted by many factors. Factors which increased the Company's effective tax rate included a one-time international tax impact related to the establishment of the supply chain center of expertise in Europe, decreased U.S. research and development credit in 2014 compared to 2013 due to two years inclusion as a result of the reinstatement in 2013, decreased domestic manufacturer's deduction, and other items. Combined, these factors increased the Company's effective tax rate by 1.6 percentage points. This increase was partially offset by a 0.8 percentage point decrease, which related to both lower 3M income tax reserves for 2014 when compared to 2013 and international taxes as a result of changes to the geographic mix of income before taxes.
	The effective tax rate for 2013 was 28.1 percent, compared to 29.0 percent in 2012, a decrease of 0.9 percentage points, impacted by many factors. Factors that decreased the Company's effective tax rate included international taxes as a result of changes to the geographic mix of income before taxes, the reinstatement of the U.S. research and development credit in 2013, an increase in the domestic manufacturer's deduction benefit, the restoration of tax basis on certain assets for which depreciation deductions were previously limited, and other items. Combined, these factors decreased the Company's effective tax rate by 4.0 percentage points. This benefit was partially offset by factors that increased the effective tax rate by 3.1 percentage points, which largely related to increases in 3M's income tax reserves for 2013 when compared to 2012.
	The Company files income tax returns in the U.S. federal jurisdiction, and various states and foreign jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2005.
	The IRS has completed its field examination of the Company's U.S. federal income tax returns for the years 2005 through 2012. The Company protested certain IRS positions within these tax years and entered into the administrative appeals process with the IRS. In December 2012, the Company received a statutory notice of deficiency for the 2006 year. The Company filed a petition in Tax Court in the first quarter of 2013 relating to the 2006 tax year.
	Currently, the Company is under examination by the IRS for its U.S. federal income tax returns for the years 2013 and 2014. It is anticipated that the IRS will complete its examination of the Company for 2013 by the end of the first quarter of 2015 and for 2014 by the end of the first quarter of 2016. As of December 31, 2014, the IRS has not proposed any significant adjustments to the Company's tax positions for which the Company is not adequately reserved.
	Payments relating to other proposed assessments arising from the 2005 through 2014 examinations may not be made until a final agreement is reached between the Company and the IRS on such assessments or upon a final resolution resulting from the administrative appeals process or judicial action. In addition to the U.S. federal examination, there is also audit activity in several U.S. state and foreign jurisdictions.
	3M anticipates changes to the Company's uncertain tax positions due to the closing of various audit years mentioned above and closure of statutes. Currently, the Company is not estimating a significant increase or decrease in unrecognized tax benefits as of December 31, 2014, during the next 12 months.
	A reconciliation of the beginning and ending amount of gross unrecognized tax benefits (UTB) is as follows:
	Federal, State and Foreign Tax
	(Millions)				2014			2013			2012
	Gross UTB Balance at January 1				$	659		$	528		$	594
	Additions based on tax positions related to the current year					201			97			80
	Additions for tax positions of prior years					30			158			114
Reductions for tax positions of prior years					-74			-29			-120
Settlements					-154			-17			-50
Reductions due to lapse of applicable statute of limitations					-79			-78			-90
Gross UTB Balance at December 31				$	583		$	659		$	528
Net UTB impacting the effective tax rate at December 31				$	265		$	262		$	185
The total amount of UTB, if recognized, would affect the effective tax rate by $265 million as of December 31, 2014, $262 million as of December 31, 2013, and $185 million as of December 31, 2012. The ending net UTB results from adjusting the gross balance for items such as Federal, State, and non-U.S. deferred items, interest and penalties, and deductible taxes. The net UTB is included as components of Other Current Assets, Other Assets, Accrued Income Taxes, and Other Liabilities within the Consolidated Balance Sheet.
The Company recognizes interest and penalties accrued related to unrecognized tax benefits in tax expense. The Company recognized in the consolidated statement of income on a gross basis approximately $14 million of benefit, $22 million of expense, and $12 million of benefit in 2014, 2013, and 2012, respectively. The amount of interest and penalties recognized may be an expense or benefit due to new or remeasured unrecognized tax benefit accruals. At December 31, 2014, and December 31, 2013, accrued interest and penalties in the consolidated balance sheet on a gross basis were $44 million and $62 million, respectively. Included in these interest and penalty amounts are interest and penalties related to tax positions for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility. Because of the impact of deferred tax accounting, other than interest and penalties, the disallowance of the shorter deductibility period would not affect the annual effective tax rate but would accelerate the payment of cash to the taxing authority to an earlier period.
As a result of certain employment commitments and capital investments made by 3M, income from certain manufacturing activities in the following countries is subject to reduced tax rates or, in some cases, is exempt from tax for years through the following: China (2016), Taiwan (2016), Korea (2018), Brazil (2023), Singapore (2023), Switzerland (2024), and Panama (indefinitely). The income tax benefits attributable to the tax status of these subsidiaries are estimated to be $111 million (17 cents per diluted share) in 2014, $87 million (13 cents per diluted share) in 2013, and $64 million (9 cents per diluted share) in 2012.
The Company has not provided deferred taxes on unremitted earnings attributable to international companies that have been considered to be reinvested indefinitely. These earnings relate to ongoing operations and were approximately $11.2 billion as of December 31, 2014. Because of the availability of U.S. foreign tax credits, the multiple avenues in which to repatriate the earnings to minimize tax cost, and because a large portion of these earnings are not liquid, it is not practical to determine the income tax liability that would be payable if such earnings were not reinvested indefinitely.

Marketable_Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2014
Marketable Securities
Marketable Securities	NOTE 8. Marketable Securities
	The Company invests in agency securities, corporate securities, asset-backed securities and other securities. The following is a summary of amounts recorded on the Consolidated Balance Sheet for marketable securities (current and non-current).
				December 31,		December 31,
	(Millions)			2014		2013
	U.S. government agency securities			$	67	$	103
	Foreign government agency securities				75		30
	Corporate debt securities				241		143
	Commercial paper				―		60
	Certificates of deposit/time deposits				41		20
	U.S. municipal securities				―		2
	Asset-backed securities:
		Automobile loan related			122		287
		Credit card related			59		52
		Equipment lease related			21		30
		Other			―		29
	Asset-backed securities total				202		398
	Current marketable securities			$	626	$	756
	U.S. government agency securities			$	41	$	131
	Foreign government agency securities				20		95
	Corporate debt securities				378		638
	Certificates of deposit/time deposits				―		20
	U.S. treasury securities				38		49
	U.S. municipal securities				15		―
	Auction rate securities				―		11
	Asset-backed securities:
		Automobile loan related			160		298
		Credit card related			103		128
		Equipment lease related			27		37
		Other			46		46
	Asset-backed securities total				336		509
	Non-current marketable securities			$	828	$	1,453
	Total marketable securities			$	1,454	$	2,209
	Classification of marketable securities as current or non-current is dependent upon management's intended holding period, the security's maturity date and liquidity considerations based on market conditions. If management intends to hold the securities for longer than one year as of the balance sheet date, they are classified as non-current. At December 31, 2014, gross unrealized losses totaled approximately $1 million (pre-tax), while gross unrealized gains totaled approximately $1 million (pre-tax). At December 31, 2013, gross unrealized losses totaled approximately $5 million (pre-tax), while gross unrealized gains totaled approximately $1 million (pre-tax). Refer to Note 5 for a table that provides the net realized gains (losses) related to sales or impairments of debt and equity securities, which includes marketable securities. The gross amounts of the realized gains or losses were not material. Cost of securities sold use the first in, first out (FIFO) method. Since these marketable securities are classified as available-for-sale securities, changes in fair value will flow through other comprehensive income, with amounts reclassified out of other comprehensive income into earnings upon sale or “other-than-temporary” impairment.
	3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders' equity. Such an unrealized loss does not reduce net income attributable to 3M for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.
	The balance at December 31, 2014, for marketable securities by contractual maturity are shown below. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.
	(Millions)		31-Dec-14
	Due in one year or less		$	367
	Due after one year through five years			1,064
	Due after five years through ten years			8
	Due after ten years			15
	Total marketable securities		$	1,454
	3M has a diversified marketable securities portfolio of $1.454 billion as of December 31, 2014. Within this portfolio, current and long-term asset-backed securities (estimated fair value of $538 million) primarily include interests in automobile loans, credit cards and equipment leases. 3M's investment policy allows investments in asset-backed securities with minimum credit ratings of Aa2 by Moody's Investors Service or AA by Standard & Poor's or Fitch Ratings or DBRS. Asset-backed securities must be rated by at least two of the aforementioned rating agencies, one of which must be Moody's Investors Service or Standard & Poor's. At December 31, 2014, all asset-backed security investments were in compliance with this policy. Approximately 96.6 percent of all asset-backed security investments were rated AAA or A-1+ by Standard & Poor's and/or Aaa or P-1 by Moody's Investors Service and/or AAA or F1+ by Fitch Ratings. Interest rate risk and credit risk related to the underlying collateral may impact the value of investments in asset-backed securities, while factors such as general conditions in the overall credit market and the nature of the underlying collateral may affect the liquidity of investments in asset-backed securities. 3M does not currently expect risk related to its holding in asset-backed securities to materially impact its financial condition or liquidity.

LongTerm_Debt_and_ShortTerm_Bo

Long-Term Debt and Short-Term Borrowings	12 Months Ended
	Dec. 31, 2014
Long-Term Debt and Short-Term Borrowings
Long-Term Debt and Short-Term Borrowings	NOTE 9. Long-Term Debt and Short-Term Borrowings
	The following debt tables reflects effective interest rates, which include the impact of interest rate swaps, as of December 31, 2014. The reference column in the table below indicates if debt was issued on a combined basis, with the combined debt separated to show the impact of fixed versus floating effective interest rates as of December 31, 2014. Combined debt is referenced as A1, A2; D1, D2; and G1, G2. The effective interest rate is subject to future changes based on underlying indices related to 3M's floating rate debt and interest rate swaps. This reference column is also used to refer to later discussion concerning this debt. Carrying value includes the impact of derivative/hedging activity. Long-term debt and short-term borrowings as of December 31 consisted of the following:
	Long-Term Debt
					Currency/		Effective			Final
	(Millions)				Fixed vs.		Interest			Maturity		Carrying Value
	Description / 2014 Principal Amount		Reference		Floating		Rate			Date		2014			2013
	Eurobond (775 million Euros)		A1		Euro Fixed		―	%		―		$	―		$	1,075
	Eurobond (250 million Euros)		A2		Euro Floating		―	%		―			―			349
	Medium-term note ($1 billion)		B		USD Fixed		1.62	%		2016			997			995
	Medium-term note (750 million Euros)		C		Euro Fixed		1.71	%		2026			897			―
	Eurobond (300 million Euros)		D1		Euro Fixed		1.97	%		2021			363			411
	Eurobond (300 million Euros)		D2		Euro Floating		0.4	%		2021			390			404
	30-year bond ($750 million)		E		USD Fixed		5.73	%		2037			748			748
	Medium-term note ($650 million)		F		USD Fixed		1.1	%		2017			649			648
	Medium-term note ($600 million)		G1		USD Floating		0.28	%		2019			594			―
	Medium-term note ($25 million)		G2		USD Fixed		1.74	%		2019			25			―
	Medium-term note (500 million Euros)		H		Euro Floating		0.31	%		2018			608			―
	Medium-term note ($600 million)		I		USD Fixed		2.17	%		2022			593			592
	30-year debenture ($330 million)		J		USD Fixed		6.01	%		2028			344			346
	Medium-term note ($325 million)		K		USD Fixed		4.05	%		2044			315			―
	UK borrowing (66 million GBP)		L		GBP Floating		―	%		―			―			109
	Floating rate note ($96 million)		M		USD Floating		―	%		2041			96			97
	Floating rate note ($55 million)		N		USD Floating		―	%		2044			55			59
	Other borrowings		O		Various		4.17	%		2015-2040			112			79
	Total long-term debt											$	6,786		$	5,912
	Less: current portion of long-term debt												55			1,586
	Long-term debt (excluding current portion)											$	6,731		$	4,326
	Post-Swap Borrowing (Long-Term Debt, Including Current Portion
			2014						2013
	(Millions)		Carrying Value			Effective Interest Rate			Carrying Value			Effective Interest Rate
	Fixed-rate debt		$	4,933		2.74	%		$	4,821		3.19	%
	Floating-rate debt			1,853		0.53	%			1,091		0.48	%
	Total long-term debt, including current portion		$	6,786					$	5,912
	Short-Term Borrowings and Current Portion of Long-Term Debt
			Effective			Carrying Value
	(Millions)		Interest Rate			2014			2013
	Current portion of long-term debt		―	%		$	55		$	1,586
	U.S. dollar commercial paper		―	%			―			―
	Other borrowings		2.46	%			51			97
	Total short-term borrowings and current portion of long-term debt					$	106		$	1,683
	Maturities of Long-term Debt
	Maturities of long-term debt for the five years subsequent of December 31, 2014 are as follows (in millions):
																After
	2015			2016			2017			2018			2019			2019		Total
	$	55		$	1,109		$	745		$	608		$	622		$	3,647	$	6,786
	Long-term debt payments due in 2015, 2016 and 2017 include floating rate notes totaling $55 million (classified as current portion of long-term debt), $71 million (included in other borrowings in the long-term debt table) and $96 million (included as a separate floating rate note in the long-term debt table), respectively, as a result of put provisions associated with these debt instruments.
	Credit Rating / Five-Year Revolving Credit Facility
	As of February 2015, the Company has an AA- credit rating, with a stable outlook, from Standard & Poor's and an Aa3 credit rating, with a negative outlook, from Moody's Investors Service. In August 2014, 3M amended and extended the existing $1.5 billion five-year revolving credit facility expiring in September 2017 to a $2.25 billion five-year agreement expiring in August 2019. This credit agreement includes a provision under which 3M may request an increase of up to $2.25 billion, bringing the total facility up to $4.5 billion (at the lender's discretion). This facility was undrawn at December 31, 2014. Under the $2.25 billion credit agreement, the Company is required to maintain its EBITDA to Interest Ratio as of the end of each fiscal quarter at not less than 3.0 to 1. This is calculated (as defined in the agreement) as the ratio of consolidated total EBITDA for the four consecutive quarters then ended to total interest expense on all funded debt for the same period. At December 31, 2014, this ratio was approximately 60 to 1. Debt covenants do not restrict the payment of dividends.
	Other Credit Facilities
	In December 2012, 3M entered into a three-year 66 million British Pound (approximately $106 million) committed credit facility agreement with JP Morgan Chase Bank, which was fully drawn as of December 31, 2012. 3M repaid 36 million British Pounds in the first quarter of 2014, with the remaining balance of 30 million British Pounds repaid in December 2014 (reference L in the preceding debt table). Apart from the committed facilities, an additional $219 million in stand-alone letters of credit and $18 million in bank guarantees were also issued and outstanding at December 31, 2014. These lines of credit are utilized in connection with normal business activities.
	Long-Term Debt
	The following provides additional discussion concerning 3M's long-term debt, with a reference back to the preceding debt table.
	2014 Long-Term Debt Issuances (Ref. C, G1, G2, H, K)
	The Company has a “well-known seasoned issuer” shelf registration statement, effective May 16, 2014, which registers an indeterminate amount of debt or equity securities for future sales. This replaced 3M's previous shelf registration dated August 5, 2011. In June 2014, in connection with the May 16, 2014, shelf registration, 3M re-commenced its medium-term notes program (Series F) under which 3M may issue, from time to time, up to $9 billion aggregate principal amount of notes. Included in this $9 billion are $2.25 billion of notes previously issued in 2011 and 2012 as part of Series F. In June 2014, 3M issued $625 million aggregate principal amount of five-year fixed rate medium-term notes due 2019 with a coupon rate of 1.625%. Upon debt issuance, the Company entered into an interest rate swap to convert $600 million of this amount to an interest rate based on a floating three-month LIBOR index. In addition, in June 2014, 3M issued $325 million aggregate principal amount of thirty-year fixed rate medium-term notes due 2044 with a coupon rate of 3.875%. In November 2014, the Company issued 500 million Euros aggregate principal amount of four-year floating rate medium-term notes due 2018 with an interest rate based on a floating three-month EURIBOR index, and also issued 750 million Euros aggregate principal amount of twelve-year fixed rate medium-term notes due 2026 with a coupon rate of 1.5%. Both June 2014 and November 2014 debt issuances were from the medium-term notes program (Series F).
	2014 Eurobond Maturity (Ref. A1, A2)
	In July 2007, 3M issued a seven-year 5.0% fixed rate Eurobond for an amount of 750 million Euros (carrying value of approximately $1.042 billion in U.S. Dollars at December 31, 2013). In addition, in December 2007, 3M reopened its existing seven year 5.0% fixed rate Eurobond for an additional amount of 275 million Euros (carrying value of approximately $382 million in U.S. Dollars at December 31, 2013). This security was issued at a premium and was subsequently consolidated with the original security in January 2008. Upon the initial debt issuance in July 2007, 3M completed a fixed-to-floating interest rate swap on a notional amount of 400 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation. In August 2010, the Company terminated 150 million Euros of the notional amount of this swap. As a result, the notional amount remaining after the partial termination was 250 million Euros. The termination of a portion of this swap did not impact the terms of the remaining portion. After these swaps, the fixed rate portion of the Eurobond totaled 775 million Euros and the floating rate portion totaled 250 million Euros. These Eurobonds and their corresponding fixed-to-floating interest rate swap matured in July 2014.
	2013 Long-term Debt Issuances (Ref. D1, D2)
	In November 2013, 3M issued an eight-year 1.875% fixed rate Eurobond for an amount of 600 million Euros (carrying value of approximately $753 million in U.S. Dollars at December 31, 2014). Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of 300 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation. After this swap, the fixed rate portion of the Eurobond totaled 300 million Euros and the floating rate portion totaled 300 million Euros.
	2011 / 2012 Long-Term Debt Issuances (Ref. B, F, I)
	The Company, in connection with a prior “well-known seasoned issuer” shelf registration statement, effective August 5, 2011, registered an indeterminate amount of debt or equity securities for future sales. In September 2011, in connection with this August 5, 2011 shelf registration statement, 3M established a $3 billion medium-term notes program (Series F), from which 3M issued $1 billion aggregate principal amount of five-year fixed rate medium-term notes with a coupon rate of 1.375%. In June 2012, 3M issued $650 million aggregate principal amount of five-year fixed rate medium-notes due 2017 with a coupon rate of 1.000% and $600 million aggregate principal amount of ten-year fixed rate medium-term notes due 2022 with a coupon rate of 2.000%, which were both issued from this $3 billion medium-term notes program (Series F).
	Other Long-Term Debt Issuances (Ref. E, J)
	In March 2007, the Company issued a thirty-year, $750 million, fixed rate note with a coupon rate of 5.70%. In 1998, the Company issued a thirty-year $330 million debenture due 2028, with a coupon rate of 6.01%.
	Floating Rate Notes / Other Borrowings (Ref. M, N, O)
	At various times, 3M has issued floating rate notes containing put provisions. 3M would be required to repurchase these securities at various prices ranging from 99 percent to 100 percent of par value according to the reduction schedules for each security. In December 2004, 3M issued a forty-year $60 million floating rate note, with a rate based on a floating LIBOR index. Under the terms of this floating rate note due in 2044, holders have an annual put feature at 100 percent of par value from 2014 and every anniversary thereafter until final maturity. Under the terms of the floating rate notes due in 2027, 2040 and 2041, holders have put options that commence ten years from the date of issuance and each third anniversary thereafter until final maturity at prices ranging from 99 percent to 100 percent of par value. In 2008 through 2014, 3M was required to repurchase an immaterial amount of principal on the aforementioned floating rate notes.

Pension_and_Postretirement_Ben

Pension and Postretirement Benefit Plans	12 Months Ended
	Dec. 31, 2014
Pension and Postretirement Benefit Plans
Pension and Postretirement Benefit Plans	NOTE 10. Pension and Postretirement Benefit Plans
	3M has company-sponsored retirement plans covering substantially all U.S. employees and many employees outside the United States. In total, 3M has over 80 defined benefit plans in 28 countries. Pension benefits associated with these plans generally are based on each participant's years of service, compensation, and age at retirement or termination. The primary U.S. defined-benefit pension plan was closed to new participants effective January 1, 2009. The Company also provides certain postretirement health care and life insurance benefits for substantially all of its U.S. employees who reach retirement age while employed by the Company. Most international employees and retirees are covered by government health care programs. The cost of company-provided postretirement health care plans for international employees is not material and is combined with U.S. amounts in the tables that follow.
	The Company also sponsors employee savings plans under Section 401(k) of the Internal Revenue Code. These plans are offered to substantially all regular U.S. employees. For eligible employees hired prior to January 1, 2009, employee 401(k) contributions of up to 6% of eligible compensation are matched in cash at rates of 60% or 75%, depending on the plan in which the employee participates. Employees hired on or after January 1, 2009, receive a cash match of 100% for employee 401(k) contributions of up to 6% of eligible compensation and also receive an employer retirement income account cash contribution of 3% of the participant's total eligible compensation. All contributions are invested in a number of investment funds pursuant to the employees' elections. Employer contributions to the U.S. defined contribution plans were $153 million, $136 million and $124 million for 2014, 2013 and 2012, respectively. 3M subsidiaries in various international countries also participate in defined contribution plans. Employer contributions to the international defined contribution plans were $75 million, $71 million and $58 million for 2014, 2013 and 2012, respectively.
	The Company has made deposits for its defined benefit plans with independent trustees. Trust funds and deposits with insurance companies are maintained to provide pension benefits to plan participants and their beneficiaries. There are no plan assets in the non-qualified plan due to its nature. For its U.S. postretirement health care and life insurance benefit plans, the Company has set aside amounts at least equal to annual benefit payments with an independent trustee.
	In August 2006, the Pension Protection Act (PPA) was signed into law in the U.S. The PPA transition rules increased the funding target for defined benefit pension plans to 100% of the target liability by 2011. 3M's primary U.S. qualified defined benefit plan does not have a mandatory cash contribution because the Company has a significant credit balance from previous discretionary contributions that can be applied to any PPA funding requirements.
	In the fourth quarter of 2010, the Company made further changes to its U.S. postretirement health care benefit plans. As a result of these changes, the Company will transition all current and future retirees to the savings account benefits-based plan announced in 2008. These changes became effective beginning January 1, 2013, for all Medicare eligible retirees and their Medicare eligible dependents and will become effective beginning January 1, 2016, for all non-Medicare eligible retirees and their eligible dependents.
	In December 2011, the Company offered a voluntary early retirement incentive program to certain eligible participants of its U.S. pension plans who met age and years of pension service requirements. The eligible participants who accepted the offer and retired on February 1, 2012, received an enhanced pension benefit. Pension benefits were enhanced by adding one additional year of pension service and one additional year of age for certain benefit calculations. 616 participants accepted the offer and retired on February 1, 2012. As a result, the Company incurred a $26 million charge related to these special termination benefits in the first quarter of 2012.
	Effective July 1, 2012, 3M Canada closed its pension plans for salaried employees to new participants. The change did not trigger a plan remeasurement and therefore there was no immediate impact to the liability and expense.
	In the third quarter of 2014, former U.S. employees who have a pension benefit for which they have not begun receiving payment (term vested) were offered a lump sum payout of their pension benefit. As a result of this action, the projected benefit obligation (PBO) liability was reduced in the fourth quarter of 2014 by approximately $270 million, with the actual cash payout of approximately the same amount paid from the plan's assets in the fourth quarter of 2014. The PBO liability reduction was 34% of the term vested eligible PBO and a 2% reduction in the overall U.S. pension PBO liability based on the December 31, 2013, valuation. There was no pension expense impact as a result of this action on 3M's consolidated statement of income in 2014.
	In the fourth quarter of 2014, 3M's Board of Directors approved an amendment of the U.S. defined benefit pension plan to include a lump sum payment option for employees that have vested retirement benefits who commence their pension January 1, 2015, or later. This option is also available to vested employees who leave 3M before becoming eligible to retire at the time of termination. This change reduced 3M's year-end 2014 PBO liability by approximately $266 million.
	As of December 31, 2014, the Company converted to the "RP 2014 Mortality Tables" and updated the mortality improvement scale it used for calculating the year-end 2014 U.S. defined benefit pension annuitant and postretirement obligations and 2015 expense. The impact of this change increased the year-end 2014 U.S. PBO for pension and the 2014 U.S. accumulated postretirement benefit obligation.
	3M was informed during the first quarter of 2009, that the general partners of WG Trading Company, in which 3M's benefit plans hold limited partnership interests, are the subject of a criminal investigation as well as civil proceedings by the SEC and CFTC (Commodity Futures Trading Commission). In March 2011, over the objections of 3M and six other limited partners of WG Trading Company, the district court judge ruled in favor of the court appointed receiver's proposed distribution plan (and in April 2013, the United States Court of Appeals for the Second Circuit affirmed the district court's ruling). The benefit plan trustee holdings of WG Trading Company interests were adjusted to reflect the decreased estimated fair market value, inclusive of estimated insurance proceeds, as of the annual measurement dates. The Company has insurance that it believes, based on what is currently known, will result in the probable recovery of a portion of the decrease in original asset value. As of the 2014 measurement date, these holdings represented less than one half of one percent of 3M's fair value of total plan assets. 3M currently believes that the resolution of these events will not have a material adverse effect on the consolidated financial position of the Company.
	The following tables include a reconciliation of the beginning and ending balances of the benefit obligation and the fair value of plan assets as well as a summary of the related amounts recognized in the Company's consolidated balance sheet as of December 31 of the respective years. 3M also has certain non-qualified unfunded pension and postretirement benefit plans, inclusive of plans related to supplement/excess benefits for employees impacted by particular relocations and other matters, that individually and in the aggregate are not significant and which are not included in the tables that follow. The obligations for these plans are included within other liabilities in the Company's consolidated balance sheet and aggregated less than $30 million as of December 31, 2014 and 2013.
					Qualified and Non-qualified
					Pension Benefits												Postretirement
					United States						International						Benefits
	(Millions)				2014			2013		`	2014			2013			2014			2013
	Change in benefit obligation
		Benefit obligation at beginning of year			$	13,967		$	14,830		$	6,346		$	6,414		$	2,017		$	2,205
		Acquisitions/Transfers in				―			15			―			―			―			―
		Service cost				241			258			141			147			65			80
		Interest cost				676			598			252			238			97			88
		Participant contributions				―			―			10			8			18			30
		Foreign exchange rate changes				―			―			-663			-79			-11			-13
		Plan amendments				-266			―			3			3			―			-20
		Actuarial (gain) loss				2,874			-986			1,128			-163			415			-225
		Medicare Part D Reimbursement				―			―			―			―			1			2
		Benefit payments				-1,039			-747			-235			-222			-140			-130
		Settlements, curtailments, special
			termination benefits and other			-1			-1			-3			―			―			―
		Benefit obligation at end of year			$	16,452		$	13,967		$	6,979		$	6,346		$	2,462		$	2,017
	Change in plan assets
		Fair value of plan assets at
			beginning of year		$	13,889		$	13,781		$	5,758		$	5,222		$	1,405		$	1,321
		Actual return on plan assets				1,749			803			813			421			148			178
		Company contributions				45			53			165			423			5			6
		Participant contributions				―			―			10			8			18			30
		Foreign exchange rate changes				―			―			-554			-94			―			―
		Benefit payments				-1,039			-747			-235			-222			-140			-130
		Settlements, curtailments, special
			termination benefits and other			-1			-1			―			―			―			―
		Fair value of plan assets at end of year			$	14,643		$	13,889		$	5,957		$	5,758		$	1,436		$	1,405
	Funded status at end of year				$	-1,809		$	-78		$	-1,022		$	-588		$	-1,026		$	-612
					Qualified and Non-qualified
					Pension Benefits												Postretirement
					United States						International						Benefits
	(Millions)				2014			2013			2014			2013			2014			2013
	Amounts recognized in the
		Consolidated Balance Sheet as of
		Dec. 31,
		Non-current assets			$	3		$	399		$	43		$	178		$	―		$	―
		Accrued benefit cost
			Current liabilities			-46			-47			-10			-10			-4			-4
			Non-current liabilities			-1,766			-430			-1,055			-756			-1,022			-608
		Ending balance			$	-1,809		$	-78		$	-1,022		$	-588		$	-1,026		$	-612
	Amounts recognized in accumulated
		other comprehensive income as of
		Dec. 31,
		Net transition obligation (asset)			$	―		$	―		$	-3		$	-4		$	―		$	―
		Net actuarial loss (gain)				5,462			3,537			2,200			1,949			914			616
		Prior service cost (credit)				-251			20			-93			-117			-102			-151
		Ending balance			$	5,211		$	3,557		$	2,104		$	1,828		$	812		$	465
	The balance of amounts recognized for international plans in accumulated other comprehensive income as of December 31 in the preceding table are presented based on the foreign currency exchange rate on that date.
	The pension accumulated benefit obligation represents the actuarial present value of benefits based on employee service and compensation as of the measurement date and does not include an assumption about future compensation levels. The accumulated benefit obligation of the U.S. pension plans was $15.335 billion and $13.357 billion at December 31, 2014 and 2013, respectively. The accumulated benefit obligation of the international pension plans was $6.401 billion and $5.825 billion at December 31, 2014 and 2013, respectively.
The following amounts relate to pension plans with accumulated benefit obligations in excess of plan assets as of December 31:
			Qualified and Non-qualified Pension Plans
			United States						International
(Millions)			2014			2013			2014			2013
Projected benefit obligation			$	16,435		$	486		$	2,588		$	2,198
Accumulated benefit obligation				15,319			463			2,335			1,960
Fair value of plan assets				14,623			9			1,636			1,547
Components of net periodic cost and other amounts recognized in other comprehensive income
Net periodic benefit cost is recorded in cost of sales, selling, general and administrative expenses, and research, development and related expenses. Components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31 follow:
				Qualified and Non-qualified
				Pension Benefits																	Postretirement
				United States									International								Benefits
(Millions)				2014			2013			2012			2014			2013			2012		2014		2013		2012
Net periodic benefit cost (benefit)
	Service cost			$	241		$	258		$	254		$	141		$	147		$	124	$	65	$	80	$	78
	Interest cost				676			598			587			252			238			247		97		88		86
	Expected return on plan assets				-1,043			-1,046			-992			-312			-291			-295		-90		-90		-84
	Amortization of transition
		(asset) obligation			―			―			―			-1			-1			-1		―		―		―
	Amortization of prior service
		cost (benefit)			4			5			5			-16			-16			-17		-47		-66		-72
	Amortization of net actuarial (gain)
		loss			243			399			470			121			153			122		56		95		108
Net periodic benefit cost (benefit)				$	121		$	214		$	324		$	185		$	230		$	180	$	81	$	107	$	116
Settlements, curtailments, special
	termination benefits and other				―			―			26			4			2			4		―		―		―
Net periodic benefit cost (benefit)
	after settlements, curtailments,
	special termination benefits
	and other			$	121		$	214		$	350		$	189		$	232		$	184	$	81	$	107	$	116
Other changes in plan assets and
	benefit obligations recognized in
	other comprehensive (income)
	loss
	Amortization of transition (asset)
		obligation			―			―			―			1			1			1		―		―		―
	Prior service cost (benefit)				-266			―			―			3			3			-7		―		-20		―
	Amortization of prior service cost
		(benefit)			-4			-5			-5			16			16			17		47		66		72
	Net actuarial (gain) loss				2,167			-743			-470			592			-294			707		358		-313		-33
	Amortization of net actuarial (gain)
		loss			-243			-399			-470			-121			-153			-122		-56		-95		-108
	Foreign currency				―			―			―			-215			-47			24		-1		-2		-1
Total recognized in other
	comprehensive (income) loss			$	1,654		$	-1,147		$	-945		$	276		$	-474		$	620	$	348	$	-364	$	-70
Total recognized in net periodic
	benefit cost (benefit) and other
	comprehensive (income) loss			$	1,775		$	-933		$	-595		$	465		$	-242		$	804	$	429	$	-257	$	46
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over the next fiscal year
			Qualified and Non-qualified Pension Benefits
													Postretirement
(Millions)			United States			International			Benefits
Amortization of transition (asset) obligation			$	―		$	-1		$	―
Amortization of prior service cost (benefit)				-24			-15			-33
Amortization of net actuarial (gain) loss				408			154			77
Total amortization expected over the next fiscal year			$	384		$	138		$	44
Weighted-average assumptions used to determine benefit obligations
				Qualified and Non-qualified Pension Benefits																	Postretirement
				United States									International								Benefits
				2014			2013			2012			2014			2013			2012		2014		2013		2012
Discount rate				4.1	%		4.98	%		4.14	%		3.11	%		4.02	%		3.78	%	4.07	%	4.83	%	4	%
Compensation rate
	increase			4.1	%		4	%		4	%		3.33	%		3.35	%		3.31	%	N/A		N/A		N/A
The Company is in the process of transitioning all current and future retirees in the U.S. postretirement health care benefit plans to the savings account benefits-based plan announced in 2008. The contributions provided by the Company to the health savings accounts increase three percent per year. Therefore, the Company no longer has material exposure to health care cost inflation.
Weighted-average assumptions used to determine net cost for years ended
				Qualified and Non-qualified Pension Benefits																	Postretirement
				United States									International								Benefits
				2014			2013			2012			2014			2013			2012		2014		2013		2012
Discount rate				4.98	%		4.14	%		4.15	%		4.02	%		3.78	%		4.58	%	4.83	%	4	%	4.04	%
Expected return
	on assets			7.75	%		8	%		8.25	%		5.83	%		5.87	%		6.38	%	7.11	%	7.19	%	7.3	%
Compensation rate
	increase			4	%		4	%		4	%		3.35	%		3.31	%		3.52	%	N/A		N/A		N/A
The Company determines the discount rate used to measure plan liabilities as of the December 31 measurement date for the pension and postretirement benefit plans, which is also the date used for the related annual measurement assumptions. The discount rate reflects the current rate at which the associated liabilities could be effectively settled at the end of the year. The Company sets its rate to reflect the yield of a portfolio of high quality, fixed-income debt instruments that would produce cash flows sufficient in timing and amount to settle projected future benefits. Using this methodology, the Company determined a discount rate of 4.10% for pension and 4.07% for postretirement benefits to be appropriate for its U.S. plans as of December 31, 2014, which is a decrease of 0.88 percentage points and 0.76 percentage points, respectively, from the rates used as of December 31, 2013. For the international pension and postretirement plans the discount rates also reflect the current rate at which the associated liabilities could be effectively settled at the end of the year. If the country has a deep market in corporate bonds the Company matches the expected cash flows from the plan either to a portfolio of bonds that generate sufficient cash flow or a notional yield curve generated from available bond information. In countries that do not have a deep market in corporate bonds, government bonds are considered with a risk premium to approximate corporate bond yields.
For the primary U.S. qualified pension plan, the Company's assumption for the expected return on plan assets was 7.75% in 2014. Projected returns are based primarily on broad, publicly traded equity and fixed-income indices and forward-looking estimates of active portfolio and investment management. As of December 31, 2014, the Company's 2015 expected long-term rate of return on U.S. plan assets is 7.75%, unchanged from 2014. The expected return assumption is based on the strategic asset allocation of the plan, long term capital market return expectations and expected performance from active investment management. The 2014 expected long-term rate of return is based on an asset allocation assumption of 26% global equities, with an expected long-term rate of return of 7%; 17% private equities, with an expected long-term rate of return of 12%; 44% fixed-income securities, with an expected long-term rate of return of 4.5%; and 13% absolute return investments independent of traditional performance benchmarks, with an expected long term return of 6.75%. The Company expects additional positive return from active investment management. These assumptions result in a 7.75% expected rate of return on an annualized basis in 2015. The actual net rate of return on plan assets in 2014 was 13.0%. In 2013 the plan earned a rate of return of 6.0% and in 2012 earned a return of 13.6%. The average annual actual return on the plan assets over the past 10 and 25 years has been 8.7% and 10.0%, respectively. Return on assets assumptions for international pension and other post-retirement benefit plans are calculated on a plan-by-plan basis using plan asset allocations and expected long-term rate of return assumptions.
During 2014, the Company contributed $210 million to its U.S. and international pension plans and $5 million to its postretirement plans. During 2013, the Company contributed $476 million to its U.S. and international pension plans and $6 million to its postretirement plans. In 2015, the Company expects to contribute an amount in the range of $100 million to $200 million of cash to its U.S. and international retirement plans. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2015. Future contributions will depend on market conditions, interest rates and other factors.
Future Pension and Postretirement Benefit Payments
The following table provides the estimated pension and postretirement benefit payments that are payable from the plans to participants.
			Qualified and Non-qualified
			Pension Benefits						Postretirement
(Millions)			United States			International			Benefits
2015 Benefit Payments			$	946		$	209		$	127
2016 Benefit Payments				964			226			139
2017 Benefit Payments				983			237			156
2018 Benefit Payments				1,010			256			160
2019 Benefit Payments				1,037			273			162
Next five years				5,381			1,563			860
Plan Asset Management
3M's investment strategy for its pension and postretirement plans is to manage the funds on a going-concern basis. The primary goal of the trust funds is to meet the obligations as required. The secondary goal is to earn the highest rate of return possible, without jeopardizing its primary goal, and without subjecting the Company to an undue amount of contribution risk. Fund returns are used to help finance present and future obligations to the extent possible within actuarially determined funding limits and tax-determined asset limits, thus reducing the potential need for additional contributions from 3M. The investment strategy has used long duration cash bonds and derivative instruments to offset a significant portion of the interest rate sensitivity of U.S. pension liabilities.
Normally, 3M does not buy or sell any of its own securities as a direct investment for its pension and other postretirement benefit funds. However, due to external investment management of the funds, the plans may indirectly buy, sell or hold 3M securities. The aggregate amount of 3M securities are not considered to be material relative to the aggregate fund percentages.
The discussion that follows references the fair value measurements of certain assets in terms of levels 1, 2 and 3. See Note 12 for descriptions of these levels. While the company believes the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.
U.S. Pension Plans Assets
In order to achieve the investment objectives in the U.S. pension plans, the investment policy includes a target strategic asset allocation. The investment policy allows some tolerance around the target in recognition that market fluctuations and illiquidity of some investments may cause the allocation to a specific asset class to vary from the target allocation, potentially for long periods of time. Acceptable ranges have been designed to allow for deviation from strategic targets and to allow for the opportunity for tactical over- and under-weights. The portfolio will normally be rebalanced when the quarter-end asset allocation deviates from acceptable ranges. The allocation is reviewed regularly by the named fiduciary of the plans.
The Company revised the classification of amounts previously presented in the table below for absolute return and long/short equity assets held by the U.S. pension plans as of December 31, 2013. These immaterial revisions reclassified $100 million and $67 million of previously presented absolute return and long/short equity amounts from level 3 to level 2, respectively. The revision to the classification of absolute return assets is also reflected within net transfers into/(out of) level 3 in the later table summarizing changes in the fair values of the U.S. pension plans' level 3 assets for the year ended December 31, 2013. The revision to the classification of long/short equity assets is also reflected within the January 1, 2013 balance in the later table summarizing changes in the fair values of the U.S. pension plans' level 3 assets.
The fair values of the assets held by the U.S. pension plans by asset class are as follows:
				Fair Value Measurements Using Inputs Considered as																	Fair Value at
(Millions)				Level 1						Level 2						Level 3					Dec. 31,
Asset Class				2014			2013			2014			2013			2014			2013		2014		2013
Equities
	U.S. equities			$	1,766		$	1,595		$	3		$	3		$	―		$	3	$	1,769	$	1,601
	Non-U.S. equities				1,214			1,324			1			1			―			―		1,215		1,325
	Index funds				―			―			148			151			2			1		150		152
	Long/short equity				―			―			71			67			382			393		453		460
Total Equities				$	2,980		$	2,919		$	223		$	222		$	384		$	397	$	3,587	$	3,538
Fixed Income
	U.S. government securities			$	1,032		$	908		$	590		$	601		$	―		$	―	$	1,622	$	1,509
	Non-U.S. government
		securities			7			20			381			316			―			―		388		336
	Preferred and convertible
		securities			3			―			―			4			―			―		3		4
	U.S. corporate bonds				8			14			2,550			2,046			―			―		2,558		2,060
	Non-U.S. corporate bonds				―			―			478			412			―			―		478		412
	Asset-backed securities				―			―			20			26			―			―		20		26
	Collateralized mortgage
		obligations			―			―			29			28			―			―		29		28
	Private placements				3			―			388			251			―			2		391		253
	Derivative instruments				6			-1			126			6			―			―		132		5
	Other				―			―			31			37			―			―		31		37
Total Fixed Income				$	1,059		$	941		$	4,593		$	3,727		$	―		$	2	$	5,652	$	4,670
Private Equity
	Buyouts			$	―		$	―		$	―		$	―		$	700		$	737	$	700	$	737
	Derivative instruments				―			―			―			―			-74			-97		-74		-97
	Direct investments				―			―			―			―			516			467		516		467
	Distressed debt				―			―			―			―			202			211		202		211
	Growth equity				15			21			―			―			183			170		198		191
	Mezzanine				―			―			―			―			116			83		116		83
	Real estate				―			―			―			―			147			156		147		156
	Secondary				―			―			―			―			145			152		145		152
	Venture capital				―			―			―			―			552			548		552		548
Total Private Equity				$	15		$	21		$	―		$	―		$	2,487		$	2,427	$	2,502	$	2,448
Total Absolute Return				$	26		$	―		$	1,141		$	1,175		$	1,006		$	658	$	2,173	$	1,833
Commodities				$	―		$	―		$	―		$	88		$	―		$	―	$	―	$	88
Cash and Cash Equivalents				$	287		$	301		$	617		$	1,017		$	―		$	―	$	904	$	1,318
Total				$	4,367		$	4,182		$	6,574		$	6,229		$	3,877		$	3,484	$	14,818	$	13,895
Other items to reconcile to fair
	value of plan assets																				$	-175	$	-6
Fair value of plan assets																					$	14,643	$	13,889
Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded. Index funds are valued at the net asset value (NAV) as determined by the custodian of the fund. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding. Long/short equity interests are valued using the NAV as determined by the administrator or custodian of the fund. Long/short equity interests, which have a redemption right in the near term and are past any lock-up redemption period, are classified as level 2.
Fixed income includes derivative instruments such as credit default swaps, interest rate swaps and futures contracts. U.S. government and government agency bonds and notes are valued at the closing price reported in the active market in which the individual security is traded. Corporate bonds and notes, asset backed securities and collateralized mortgage obligations are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flows approach that maximizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. Private placements are valued by the custodian using recognized pricing services and sources. Swaps and derivative instruments are valued by the custodian using closing market swap curves and market derived inputs.
The private equity portfolio is a diversified mix of direct investments, derivative instruments and partnership interests including buyouts, distressed debt, growth equity, mezzanine, real estate and venture capital investments. Partnership interests are valued using the most recent general partner statement of fair value, updated for any subsequent partnership interests' cash flows or expected changes in fair value. Direct investments are equity co-investments in private companies and projects, the majority of which are power infrastructure investments, which are valued by an independent valuation agent.
Absolute return consists primarily of private partnership interests in hedge funds, hedge fund of funds and bank loan funds. Partnership interests are valued using the NAV as determined by the administrator or custodian of the fund. Generally, hedge fund partnership interests, which have a redemption right in the near term and are past any lock-up redemption period, are classified as level 2. A hedge fund investment was moved from level 3 to level 2 during 2013 because the lock-up redemption period had expired. A hedge fund investment was moved to level 3 during 2014 after the investment was transferred to a new share class with a longer lock-up period.
Commodities consist of commodity-linked notes and commodity-linked derivative contracts designed to deliver investment returns similar to the Goldman Sachs Commodities Index (GSCI) or Bloomberg Commodity index returns. Commodities are valued at closing prices determined by calculation agents for outstanding transactions.
Other items to reconcile to fair value of plan assets include the net of insurance receivables for WG Trading Company, interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.
The following table sets forth a summary of changes in the fair values of the U.S. pension plans' level 3 assets for the years ended December 31, 2014 and 2013:
			Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
			Equities			Fixed Income			Private Equity			Absolute Return			Commodities			Total
(Millions)
Beginning balance at Jan. 1, 2013			$	421		$	2		$	2,136		$	865		$	107		$	3,531
Net transfers into / (out of) level 3				―			―			―			-101			―			-101
Purchases, sales, issuances, and
	settlements, net			-92			―			54			-104			-96			-238
Realized gain / (loss)				10			―			126			46			-1			181
Change in unrealized gains / (losses)
	relating to instruments sold during
	the period			-5			―			3			-30			-10			-42
Change in unrealized gains / (losses)
	relating to instruments still held at
	the reporting date			63			―			108			-18			―			153
Ending balance at Dec. 31, 2013				397			2			2,427			658			―			3,484
Net transfers into / (out of) level 3				―			―			―			100			―			100
Purchases, sales, issuances, and
	settlements, net			-43			-1			-260			205			―			-99
Realized gain / (loss)				2			―			185			―			―			187
Change in unrealized gains / (losses)
	relating to instruments sold during
	the period			-12			―			64			2			―			54
Change in unrealized gains / (losses)
	relating to instruments still held at
	the reporting date			40			-1			71			41			―			151
Ending balance at Dec. 31, 2014			$	384		$	―		$	2,487		$	1,006		$	―		$	3,877
International Pension Plans Assets
Outside the U.S., pension plan assets are typically managed by decentralized fiduciary committees. The disclosure below of asset categories is presented in aggregate for over 70 defined benefit plans in 27 countries; however, there is significant variation in asset allocation policy from country to country. Local regulations, local funding rules, and local financial and tax considerations are part of the funding and investment allocation process in each country. The Company provides standard funding and investment guidance to all international plans with more focused guidance to the larger plans.
Each plan has its own strategic asset allocation. The asset allocations are reviewed periodically and rebalanced when necessary.
The fair values of the assets held by the international pension plans by asset class are as follows:
				Fair Value Measurements Using Inputs Considered as																	Fair Value at
(Millions)				Level 1						Level 2						Level 3					Dec. 31,
Asset Class				2014			2013			2014			2013			2014			2013		2014		2013
Equities
	Growth equities			$	672		$	733		$	176		$	190		$	―		$	―	$	848	$	923
	Value equities				595			653			23			14			―			―		618		667
	Core equities				19			19			642			668			4			5		665		692
Total Equities				$	1,286		$	1,405		$	841		$	872		$	4		$	5	$	2,131	$	2,282
Fixed Income
	Domestic government debt			$	87		$	199		$	542		$	539		$	3		$	3	$	632	$	741
	Foreign government debt				45			28			816			657			―			1		861		686
	Corporate debt securities				1			1			615			638			5			20		621		659
	Mortgage backed debt				―			―			82			75			―			―		82		75
	Other debt obligations				―			―			708			391			11			13		719		404
Total Fixed Income				$	133		$	228		$	2,763		$	2,300		$	19		$	37	$	2,915	$	2,565
Private Equity
	Private equity funds			$	―		$	―		$	―		$	―		$	23		$	22	$	23	$	22
	Real estate				3			3			73			87			55			53		131		143
Total Private Equity				$	3		$	3		$	73		$	87		$	78		$	75	$	154	$	165
Absolute Return
	Hedge funds			$	―		$	―		$	95		$	62		$	22		$	56	$	117	$	118
	Insurance				―			―			―			―			476			492		476		492
	Derivatives				―			2			-4			3			―			―		-4		5
	Other				―			―			13			2			3			2		16		4
Total Absolute Return				$	―		$	2		$	104		$	67		$	501		$	550	$	605	$	619
Cash and Cash Equivalents				$	161		$	112		$	32		$	14		$	―		$	―	$	193	$	126
Total				$	1,583		$	1,750		$	3,813		$	3,340		$	602		$	667	$	5,998	$	5,757
Other items to reconcile to fair
	value of plan assets																				$	-41	$	1
Fair value of plan assets																					$	5,957	$	5,758
Equities consist primarily of mandates in public equity securities managed to the Morgan Stanley Capital All Country World Index. Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.
Fixed Income investments include domestic and foreign government, corporate, mortgage backed and other debt. Governments, corporate bonds and notes and mortgage backed securities are valued at the closing price reported if traded on an active market or at yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that maximizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks.
Private equity funds consist of both active and passive mandates. Partnership interests are valued using the most recent general partner statement of fair value, updated for any subsequent partnership interests' cash flows or expected changes in fair value. Real estate consists of property funds and REITS (Real Estate Investment Trusts). Property funds are valued using the most recent partnership statement of fair value, updated for any subsequent partnership interests' cash flows. REITS are valued at the closing price reported in the active market in which it is traded.
Absolute return consists of private partnership interests in hedge funds, insurance contracts, derivative instruments, hedge fund of funds, and bank loan funds. Insurance consists of insurance contracts, which are valued using cash surrender values which is the amount the plan would receive if the contract was cashed out at year end. Derivative instruments consist of interest rate swaps that are used to help manage risks. Hedge funds are valued at the NAV as determined by the independent administrator or custodian of the fund. Generally, hedge fund partnership interests, which have a redemption right in the near term and are past any lock-up redemption period, are classified as level 2. In 2014, a hedge fund investment was moved to level 3 after the investment was transferred to a new share class with a longer lock-up period. Another hedge fund was moved from level 3 to level 2 during 2014 because the lock-up redemption period had expired.
Other items to reconcile to fair value of plan assets include the net of interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.
The following table sets forth a summary of changes in the fair values of the international pension plans' level 3 assets for the years ended December 31, 2014 and 2013:
			Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
			Equities			Fixed Income			Private Equity			Absolute Return			Total
(Millions)
Beginning balance at Jan. 1, 2013			$	5		$	36		$	71		$	485		$	597
Net transfers into / (out of) level 3				―			―			―			―			―
Foreign currency exchange				―			-2			-1			9			6
Purchases, sales, issuances, and
	settlements, net			―			-2			1			50			49
Realized gain / (loss)				―			―			2			―			2
Change in unrealized gains / (losses)
	relating to instruments sold during
	the period			―			―			―			1			1
Change in unrealized gains / (losses)
	relating to instruments still held at
	the reporting date			―			5			2			5			12
Ending balance at Dec. 31, 2013				5			37			75			550			667
Net transfers into / (out of) level 3				―			―			―			-32			-32
Foreign currency exchange				-1			-4			-6			-64			-75
Purchases, sales, issuances, and
	settlements, net			―			-14			-2			28			12
Realized gain / (loss)				―			―			2			―			2
Change in unrealized gains / (losses)
	relating to instruments sold during
	the period			―			-1			-1			―			-2
Change in unrealized gains / (losses)
	relating to instruments still held at
	the reporting date			―			1			10			19			30
Ending balance at Dec. 31, 2014			$	4		$	19		$	78		$	501		$	602
Postretirement Benefit Plans Assets
In order to achieve the investment objectives in the U.S. postretirement plan, the investment policy includes a target strategic asset allocation. The investment policy allows some tolerance around the target in recognition that market fluctuations and illiquidity of some investments may cause the allocation to a specific asset class to vary from the target allocation, potentially for long periods of time. Acceptable ranges have been designed to allow for deviation from strategic targets and to allow for the opportunity for tactical over- and under-weights. The portfolio will normally be rebalanced when the quarter-end asset allocation deviates from acceptable ranges. The allocation is reviewed regularly by the named fiduciary of the plan.
The fair values of the assets held by the postretirement benefit plans by asset class are as follows:
				Fair Value Measurements Using Inputs Considered as																	Fair Value at
(Millions)				Level 1						Level 2						Level 3					Dec. 31,
Asset Class				2014			2013			2014			2013			2014			2013		2014		2013
Equities
	U.S. equities			$	565		$	552		$	―		$	―		$	―		$	―	$	565	$	552
	Non-U.S. equities				56			58			―			―			―			―		56		58
	Index funds				―			―			38			44			―			―		38		44
	Long/short equity				―			―			3			―			14			16		17		16
Total Equities				$	621		$	610		$	41		$	44		$	14		$	16	$	676	$	670
Fixed Income
	U.S. government securities			$	68		$	62		$	186		$	202		$	―		$	―	$	254	$	264
	Non-U.S. government
		securities			―			1			17			14			―			―		17		15
	U.S. corporate bonds				―			―			119			96			―			―		119		96
	Non-U.S. corporate bonds				―			―			24			21			―			―		24		21
	Asset-backed securities				―			―			7			9			―			―		7		9
	Collateralized mortgage
		obligations			―			―			5			5			―			―		5		5
	Private placements				―			―			25			16			―			―		25		16
	Derivative instruments				―			―			5			―			―			―		5		―
	Other				―			―			1			1			―			―		1		1
Total Fixed Income				$	68		$	63		$	389		$	364		$	―		$	―	$	457	$	427
Private Equity
	Buyouts			$	―		$	―		$	―		$	―		$	56		$	58	$	56	$	58
	Derivative instruments				―			―			―			―			-3			-3		-3		-3
	Direct investments				―			―			―			―			19			16		19		16
	Distressed debt				―			―			―			―			8			7		8		7
	Growth equity				1			1			―			―			7			6		8		7
	Mezzanine				―			―			―			―			4			3		4		3
	Real estate				―			―			―			―			5			5		5		5
	Secondary				―			―			―			―			5			5		5		5
	Venture capital				―			―			―			―			58			64		58		64
Total Private Equity				$	1		$	1		$	―		$	―		$	159		$	161	$	160	$	162
Total Absolute Return				$	1		$	―		$	41		$	37		$	37		$	26	$	79	$	63
Commodities				$	―		$	―		$	―		$	3		$	―		$	―	$	―	$	3
Cash and Cash Equivalents				$	33		$	35		$	23		$	34		$	―		$	―	$	56	$	69
Total				$	724		$	709		$	494		$	482		$	210		$	203	$	1,428	$	1,394
Other items to reconcile to fair
	value of plan assets																				$	8	$	11
Fair value of plan assets																					$	1,436	$	1,405
Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded. Index funds are valued at the NAV as determined by the custodian of the fund. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding. Long/short equity interests are valued using the NAV as determined by the administrator or custodian of the fund. Long/short equity interests, which have a redemption right in the near term and are past any lock-up redemption period, are classified as level 2. A long/short equity interest was moved from level 3 to level 2 during 2014 because the lock-up redemption period had expired.
Fixed income includes derivative investments such as credit default swaps, interest rate swaps and futures contracts that are used to help manage risks. U.S. government and government agency bonds and notes are valued at the closing price reported in the active market in which the individual security is traded. Corporate bonds and notes, asset backed securities and collateralized mortgage obligations are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that maximizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. Private placements are valued by the custodian using recognized pricing services and sources. Swaps and derivative instruments are valued by the custodian using market swap curves and market derived inputs.
The private equity portfolio is a diversified mix of direct investments, derivative instruments and partnership interests including buyouts, distressed debt, growth equity, mezzanine, real estate and venture capital investments. Partnership interests are valued using the most recent general partner statement of fair value, updated for any subsequent partnership interests' cash flows or expected changes in fair value. Direct investments are equity co-investments in private companies and projects, the majority of which are power infrastructure investments, which are valued by an independent valuation agent.
Absolute return primarily consists of private partnership interests in hedge funds, hedge fund of funds and bank loan funds. Partnership interests are valued using the NAV as determined by the independent administrator or custodian of the fund. Generally, hedge fund partnership interests, which have a redemption right in the near term and are past any lock-up redemption period, are classified as level 2. In 2014, a hedge fund investment was moved to level 3 after the investment was transferred to a new share class with a longer lock-up period. Another hedge fund was moved from level 3 to level 2 during 2014 because the lock-up redemption period had expired. The hedge fund level changes net to zero in the table below.
Commodities consist of commodity-linked notes and commodity-linked derivative contracts designed to deliver investment returns similar to the GSCI or Bloomberg Commodity index returns. Commodities are valued at closing prices determined by calculation agents for outstanding transactions.
Other items to reconcile to fair value of plan assets include the net of interest receivables, amounts due for securities sold, foreign currency fluctuations, amounts payable for securities purchased and interest payable.
The following table sets forth a summary of changes in the fair values of the postretirement plans' level 3 assets for the years ended December 31, 2014 and 2013:
			Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
			Equities			Fixed Income			Private Equity			Absolute Return			Commodities			Total
(Millions)
Beginning balance at Jan. 1, 2013			$	16		$	―		$	170		$	28		$	4		$	218
Net transfers into / (out of) level 3				―			―			―			―			―			―
Purchases, sales, issuances, and
	settlements, net			-3			―			-27			-4			-4			-38
Realized gain / (loss)				―			―			10			2			―			12
Change in unrealized gains / (losses)
	relating to instruments sold during
	the period			―			―			-3			-1			―			-4
Change in unrealized gains / (losses)
	relating to instruments still held at
	the reporting date			3			―			11			1			―			15
Ending balance at Dec. 31, 2013				16			―			161			26			―			203
Net transfers into / (out of) level 3				-2			―			―			―			―			-2
Purchases, sales, issuances, and
	settlements, net			-2			―			-45			8			―			-39
Realized gain / (loss)				―			―			29			―			―			29
Change in unrealized gains / (losses)
	relating to instruments sold during
	the period			―			―			-5			―			―			-5
Change in unrealized gains / (losses)
	relating to instruments still held at
	the reporting date			2			―			19			3			―			24
Ending balance at Dec. 31, 2014			$	14		$	―		$	159		$	37		$	―		$	210

Derivatives

Derivatives

12 Months Ended

Dec. 31, 2014

Derivatives

Derivatives

NOTE 11. Derivatives

The Company uses interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity price fluctuations. The information that follows explains the various types of derivatives and financial instruments used by 3M, how and why 3M uses such instruments, how such instruments are accounted for, and how such instruments impact 3M's financial position and performance.

Additional information with respect to the impacts on other comprehensive income of nonderivative hedging and derivative instruments is included in Note 5. Additional information with respect to the fair value of derivative instruments is included in Note 12. References to information regarding derivatives and/or hedging instruments associated with the Company's long-term debt are also made in Note 9.

Types of Derivatives/Hedging Instruments and Inclusion in Income/Other Comprehensive Income

Cash Flow Hedges:

For derivative instruments that are designated and qualify as cash flow hedges, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.

Cash Flow Hedging - Foreign Currency Forward and Option Contracts: The Company enters into foreign exchange forward and option contracts to hedge against the effect of exchange rate fluctuations on cash flows denominated in foreign currencies. These transactions are designated as cash flow hedges. The settlement or extension of these derivatives will result in reclassifications (from accumulated other comprehensive income) to earnings in the period during which the hedged transactions affect earnings. 3M may dedesignate these cash flow hedge relationships in advance of the occurrence of the forecasted transaction. The portion of gains or losses on the derivative instrument previously accumulated in other comprehensive income for dedesignated hedges remains in accumulated other comprehensive income until the forecasted transaction occurs. Changes in the value of derivative instruments after dedesignation are recorded in earnings and are included in the Derivatives Not Designated as Hedging Instruments section below. Hedge ineffectiveness and the amount excluded from effectiveness testing recognized in income on cash flow hedges were not material for 2014, 2013 and 2012. Beginning in the second quarter of 2014 3M began extending the maximum length of time over which it hedges its exposure to the variability in future cash flows of the forecasted transactions from a previous term of 12 months to a longer term of 24 months. The dollar equivalent gross notional amount of the Company's foreign exchange forward and option contracts designated as cash flow hedges at December 31, 2014, was approximately $2.2 billion.

Cash Flow Hedging - Commodity Price Management: The Company manages commodity price risks through negotiated supply contracts, price protection agreements and forward contracts. The Company uses commodity price swaps as cash flow hedges of forecasted commodity transactions to manage price volatility. The related mark-to-market gain or loss on qualifying hedges is included in other comprehensive income to the extent effective, and reclassified into cost of sales in the period during which the hedged transaction affects earnings. Generally, the length of time over which 3M hedges its exposure to the variability in future cash flows for its forecasted transactions is 12 months. No significant commodity cash flow hedges were discontinued and hedge ineffectiveness was not material for 2014, 2013 and 2012. The dollar equivalent gross notional amount of the Company's commodity price swaps designated as cash flow hedges at December 31, 2014, was $20 million.

Cash Flow Hedging – Interest Rate Contracts: In August 2011, in anticipation of the September 2011 issuance of $1 billion in five-year fixed rate notes, 3M executed a pre-issuance cash flow hedge on a notional amount of $400 million by entering into a forward-starting five-year floating-to-fixed interest rate swap. Upon debt issuance in September 2011, 3M terminated the floating-to-fixed interest rate swap. The termination of the swap resulted in a $7 million pre-tax loss ($4 million after-tax) that will be amortized over the five-year life of the note.

In the third and fourth quarters of 2014, the Company entered into forward starting interest rate swaps with notional amounts totaling 500 million Euros as a hedge against interest rate volatility associated with the forecasted issuance of fixed rate debt. Upon issuance in November 2014 of 750 million Euros aggregate principal amount of twelve-year fixed rate notes, 3M terminated these interest rate swaps. The termination resulted in a $8 million pre-tax ($5 million after-tax) loss within accumulated other comprehensive income that will be amortized over the twelve-year life of the notes.

The amortization of losses referenced in the two preceding paragraphs is included in the tables below as part of the loss recognized in income on the effective portion of derivatives as a result of reclassification from accumulated other comprehensive income.

As of December 31, 2014, the Company had a balance of $99 million associated with the after tax net unrealized gain associated with cash flow hedging instruments recorded in accumulated other comprehensive income. This includes a remaining balance of $6 million (after tax loss) related to the forward starting interest rate swaps (discussed in the preceding paragraphs), which will be amortized over the respective lives of the notes. Based on exchange rates as of December 31, 2014, 3M expects to reclassify approximately $70 million (after tax) to earnings over the next 12 months (with the impact offset by cash flows from underlying hedged items).

The location in the consolidated statements of income and comprehensive income and amounts of gains and losses related to derivative instruments designated as cash flow hedges are provided in the following table. Reclassifications of amounts from accumulated other comprehensive income into income include accumulated gains (losses) on dedesignated hedges at the time earnings are impacted by the forecasted transaction.

Year Ended December 31, 2014

(Millions)

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative

Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income

Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income

Derivatives in Cash Flow Hedging Relationships

Amount

Location

Amount

Location

Amount

Foreign currency forward/option contracts

$

183

Cost of sales

$

3

Cost of sales

$

―

Commodity price swap contracts

-4

Cost of sales

2

Cost of sales

―

Interest rate swap contracts

-8

Interest expense

-1

Interest expense

―

Total

$

171

$

4

$

―

Year Ended December 31, 2013

(Millions)

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative

Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income

Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income

Derivatives in Cash Flow Hedging Relationships

Amount

Location

Amount

Location

Amount

Foreign currency forward/option contracts

$

9

Cost of sales

$

-11

Cost of sales

$

―

Foreign currency forward contracts

-108

Interest expense

-108

Interest expense

―

Commodity price swap contracts

1

Cost of sales

-2

Cost of sales

―

Interest rate swap contracts

―

Interest expense

-1

Interest expense

―

Total

$

-98

$

-122

$

―

Year Ended December 31, 2012

(Millions)

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative

Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income

Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income

Derivatives in Cash Flow Hedging Relationships

Amount

Location

Amount

Location

Amount

Foreign currency forward/option contracts

$

-35

Cost of sales

$

41

Cost of sales

$

―

Foreign currency forward contracts

42

Interest expense

42

Interest expense

―

Commodity price swap contracts

-4

Cost of sales

-10

Cost of sales

―

Interest rate swap contracts

―

Interest expense

-1

Interest expense

―

Total

$

3

$

72

$

―

Fair Value Hedges:

For derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivatives as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current earnings.

Fair Value Hedging - Interest Rate Swaps: The Company manages interest expense using a mix of fixed and floating rate debt. To help manage borrowing costs, the Company may enter into interest rate swaps. Under these arrangements, the Company agrees to exchange, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. The mark-to-market of these fair value hedges is recorded as gains or losses in interest expense and is offset by the gain or loss of the underlying debt instrument, which also is recorded in interest expense. These fair value hedges are highly effective and, thus, there is no impact on earnings due to hedge ineffectiveness. The dollar equivalent (based on inception date foreign currency exchange rates) gross notional amount of the Company's interest rate swaps at December 31, 2014, was $1 billion.

At December 31, 2014, the Company had interest rate swaps designated as fair value hedges of underlying fixed rate obligations. In July 2007, in connection with the issuance of a seven-year Eurobond for an amount of 750 million Euros, the Company completed a fixed-to-floating interest rate swap on a notional amount of 400 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation. In August 2010, the Company terminated 150 million Euros of the notional amount of this swap. As a result, a gain of 18 million Euros, recorded as part of the balance of the underlying debt, was amortized as an offset to interest expense over this debt's remaining life. Prior to termination of the applicable portion of the interest rate swap, the mark-to-market of the hedge instrument was recorded as gains or losses in interest expense and was offset by the gain or loss on carrying value of the underlying debt instrument. Consequently, the subsequent amortization of the 18 million Euros recorded as part of the underlying debt balance was not part of gains on hedged items recognized in income in the tables below. The remaining interest rate swap of 250 million Euros (notional amount) matured in July 2014.

In November 2013, 3M issued an eight-year 1.875% fixed rate Eurobond for a face amount of 600 million Euros. Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of 300 million Euros as a fair value hedge of a portion of the fixed interest rate Eurobond obligation.

In June 2014, 3M issued a five-year 1.625% fixed rate medium-term note for a face amount of $625 million. Upon debt issuance, 3M completed a fixed-to-floating interest rate swap on a notional amount of $600 million as a fair value hedge of a portion of the fixed interest rate medium-term note obligation.

The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments designated as fair value hedges and similar information relative to the hedged items are as follows:

Year ended December 31, 2014

Gain (Loss) on Derivative

Gain (Loss) on Hedged Item

(Millions)

Recognized in Income

Recognized in Income

Derivatives in Fair Value Hedging Relationships

Location

Amount

Location

Amount

Interest rate swap contracts

Interest expense

$

11

Interest expense

$

-11

Total

$

11

$

-11

Year ended December 31, 2013

Gain (Loss) on Derivative

Gain (Loss) on Hedged Item

(Millions)

Recognized in Income

Recognized in Income

Derivatives in Fair Value Hedging Relationships

Location

Amount

Location

Amount

Interest rate swap contracts

Interest expense

$

-21

Interest expense

$

21

Total

$

-21

$

21

Year ended December 31, 2012

Gain (Loss) on Derivative

Gain (Loss) on Hedged Item

(Millions)

Recognized in Income

Recognized in Income

Derivatives in Fair Value Hedging Relationships

Location

Amount

Location

Amount

Interest rate swap contracts

Interest expense

$

-5

Interest expense

$

5

Total

$

-5

$

5

Net Investment Hedges:

The Company may use non-derivative (foreign currency denominated debt) and derivative (foreign exchange forward contracts) instruments to hedge portions of the Company's investment in foreign subsidiaries and manage foreign exchange risk. The extent of 3M's use of forward contracts may depend on the volume of foreign currency denominated debt already designated in net investment hedges. For instruments that are designated and qualify as hedges of net investments in foreign operations and that meet the effectiveness requirements, the net gains or losses attributable to changes in spot exchange rates are recorded in cumulative translation within other comprehensive income. The remainder of the change in value of such instruments is recorded in earnings. Recognition in earnings of amounts previously recorded in cumulative translation is limited to circumstances such as complete or substantially complete liquidation of the net investment in the hedged foreign operation. To the extent foreign currency denominated debt is not designated in or is dedesignated from a net investment hedge relationship, changes in value of that portion of foreign currency denominated debt due to exchange rate changes are recorded in earnings through their maturity date.

3M's use of foreign exchange forward contracts designated in hedges of the Company's net investment in European subsidiaries during 2013 and 2014 varied as foreign currency denominated debt balances designated in such relationships were dedesignated, matured or were newly issued and designated. Forward contracts in hedge relationships with notional amounts totaling 594 million Euros matured in November 2013. Similar contracts reached approximately 1.3 billion Euros in notional amounts outstanding in November 2014.

At December 31, 2014, the total notional amount of foreign exchange forward contracts designated in net investment hedges was 200 million Euros and the principal amount of long-term debt instruments designated in net investment hedges totaled 1.85 billion Euros (as discussed in Note 9, specifically items C, D1, D2, and H). The maturity dates of these derivative and nonderivative instruments designated in net investment hedges range from 2015 to 2026.

The location in the consolidated statements of income and comprehensive income and amounts of gains and losses related to derivative and nonderivative instruments designated as net investment hedges are as follows. There were no reclassifications of the effective portion of net investment hedges out of accumulated other comprehensive income into income for the periods presented in the table below.

Year ended December 31, 2014

Derivative and Nonderivative Instruments in Net Investment Hedging Relationships

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

Ineffective Portion of Gain (Loss) on Instrument and Amount Excluded from Effectiveness Testing Recognized in Income

(Millions)

Amount

Location

Amount

Foreign currency denominated debt

$

152

N/A

$

―

Foreign currency forward contracts

94

Cost of sales

1

Total

$

246

$

1

Year ended December 31, 2013

Derivative and Nonderivative Instruments in Net Investment Hedging Relationships

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

Ineffective Portion of Gain (Loss) on Instrument and Amount Excluded from Effectiveness Testing Recognized in Income

(Millions)

Amount

Location

Amount

Foreign currency denominated debt

$

-82

N/A

$

―

Foreign currency forward contracts

12

Cost of sales

―

Total

$

-70

$

―

Year ended December 31, 2012

Derivative and Nonderivative Instruments in Net Investment Hedging Relationships

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

Ineffective Portion of Gain (Loss) on Instrument and Amount Excluded from Effectiveness Testing Recognized in Income

(Millions)

Amount

Location

Amount

Foreign currency denominated debt

$

-29

N/A

$

―

Total

$

-29

$

―

Derivatives Not Designated as Hedging Instruments:

Derivatives not designated as hedging instruments include dedesignated foreign currency forward and option contracts that formerly were designated in cash flow hedging relationships (as referenced in the Cash Flow Hedges section above). In addition, 3M enters into foreign currency forward contracts to offset, in part, the impacts of certain intercompany activities (primarily associated with intercompany licensing arrangements) and enters into commodity price swaps to offset, in part, fluctuations in costs associated with the use of certain commodities and precious metals. These derivative instruments are not designated in hedging relationships; therefore, fair value gains and losses on these contracts are recorded in earnings. The dollar equivalent gross notional amount of these forward, option and swap contracts not designated as hedging instruments totaled $6.6 billion as of December 31, 2014. The Company does not hold or issue derivative financial instruments for trading purposes.

The location in the consolidated statements of income and amounts of gains and losses related to derivative instruments not designated as hedging instruments are as follows:

Derivatives Not Designated as Hedging Instruments

Year ended December 31, 2014

Year ended December 31, 2013

Gain (Loss) on Derivative Recognized in Income

Gain (Loss) on Derivative Recognized in Income

(Millions)

Location

Amount

Location

Amount

Foreign currency forward/option contracts

Cost of sales

$

10

Cost of sales

$

20

Foreign currency forward contracts

Interest expense

-40

Interest expense

-43

Commodity price swap contracts

Cost of sales

―

Cost of sales

-1

Total

$

-30

$

-24

Derivatives Not Designated as Hedging Instruments

Year ended December 31, 2012

Gain (Loss) on Derivative Recognized in Income

(Millions)

Location

Amount

Foreign currency forward/option contracts

Cost of sales

$

-24

Foreign currency forward contracts

Interest expense

22

Total

$

-2

Location and Fair Value Amount of Derivative Instruments

The following tables summarize the fair value of 3M's derivative instruments, excluding nonderivative instruments used as hedging instruments, and their location in the consolidated balance sheet. Additional information with respect to the fair value of derivative instruments is included in Note 12.

31-Dec-14

(Millions)

Assets

Liabilities

Fair Value of Derivative Instruments

Location

Amount

Location

Amount

Derivatives designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

116

Other current liabilities

$

2

Foreign currency forward/option contracts

Other assets

47

Other liabilities

1

Commodity price swap contracts

Other current assets

―

Other current liabilities

4

Interest rate swap contracts

Other assets

27

Other liabilities

3

Total derivatives designated as

hedging instruments

$

190

$

10

Derivatives not designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

66

Other current liabilities

$

33

Total derivatives not designated as

hedging instruments

$

66

$

33

Total derivative instruments

$

256

$

43

December 31, 2013

(Millions)

Assets

Liabilities

Fair Value of Derivative Instruments

Location

Amount

Location

Amount

Derivatives designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

24

Other current liabilities

$

35

Commodity price swap contracts

Other current assets

1

Other current liabilities

―

Interest rate swap contracts

Other assets

8

Other liabilities

7

Total derivatives designated as

hedging instruments

$

33

$

42

Derivatives not designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

51

Other current liabilities

$

68

Total derivatives not designated as

hedging instruments

$

51

$

68

Total derivative instruments

$

84

$

110

Credit Risk and Offsetting of Assets and Liabilities of Derivative Instruments

The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company's risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. As of December 31, 2014, 3M has International Swaps and Derivatives Association (ISDA) agreements with 15 applicable banks and financial institutions which contain netting provisions. In addition to a master agreement with 3M supported by a primary counterparty's parent guarantee, 3M also has associated credit support agreements in place with 14 of its primary derivative counterparties which, among other things, provide the circumstances under which either party is required to post eligible collateral (when the market value of transactions covered by these agreements exceeds specified thresholds or if a counterparty's credit rating has been downgraded to a predetermined rating). The Company does not anticipate nonperformance by any of these counterparties.

3M has elected to present the fair value of derivative assets and liabilities within the Company's consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation. However, the following tables provide information as if the Company had elected to offset the asset and liability balances of derivative instruments, netted in accordance with various criteria in the event of default or termination as stipulated by the terms of netting arrangements with each of the counterparties. For each counterparty, if netted, the Company would offset the asset and liability balances of all derivatives at the end of the reporting period based on the 3M entity that is a party to the transactions. Derivatives not subject to master netting agreements are not eligible for net presentation. As of the applicable dates presented below, no cash collateral had been received or pledged related to these derivative instruments.

Offsetting of Financial Assets/Liabilities under Master Netting Agreements with Derivative Counterparties

31-Dec-14

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Assets Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Liabilities

Cash Collateral Received

Net Amount of Derivative Assets

Derivatives subject to master

netting agreements

$

256

$

20

$

―

$

236

Derivatives not subject to master

netting agreements

―

―

Total

$

256

$

236

31-Dec-14

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Liabilities Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Assets

Cash Collateral Pledged

Net Amount of Derivative Liabilities

Derivatives subject to master

netting agreements

$

36

$

20

$

―

$

16

Derivatives not subject to master

netting agreements

7

7

Total

$

43

$

23

31-Dec-13

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Assets Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Liabilities

Cash Collateral Received

Net Amount of Derivative Assets

Derivatives subject to master

netting agreements

$

83

$

51

$

―

$

32

Derivatives not subject to master

netting agreements

1

1

Total

$

84

$

33

31-Dec-13

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Liabilities Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Assets

Cash Collateral Pledged

Net Amount of Derivative Liabilities

Derivatives subject to master

netting agreements

$

110

$

51

$

―

$

59

Derivatives not subject to master

netting agreements

―

―

Total

$

110

$

59

Currency Effects

3M estimates that year-on-year currency effects, including hedging impacts, decreased net income attributable to 3M by approximately $97 million and $74 million in 2014 and 2013, respectively. These estimates include the effect of translating profits from local currencies into U.S. dollars; the impact of currency fluctuations on the transfer of goods between 3M operations in the United States and abroad; and transaction gains and losses, including derivative instruments designed to reduce foreign currency exchange rate risks and the negative impact of swapping Venezuelan bolivars into U.S. dollars. 3M estimates that year-on-year derivative and other transaction gains and losses increased net income attributable to 3M by approximately $8 million in 2014 and decreased net income attributable to 3M by $12 million in 2013.

Fair_Value_Measurements

Fair Value Measurements

12 Months Ended

Dec. 31, 2014

Fair Value Measurements

Fair Value Measurements

NOTE 12. Fair Value Measurements

3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis:

For 3M, assets and liabilities that are measured at fair value on a recurring basis primarily relate to available-for-sale marketable securities, available-for-sale investments (included as part of investments in the Consolidated Balance Sheet) and certain derivative instruments. Derivatives include cash flow hedges, interest rate swaps and most net investment hedges. The information in the following paragraphs and tables primarily addresses matters relative to these financial assets and liabilities. Separately, there were no material fair value measurements with respect to nonfinancial assets or liabilities that are recognized or disclosed at fair value in the Company's financial statements on a recurring basis for 2014 and 2013.

3M uses various valuation techniques, which are primarily based upon the market and income approaches, with respect to financial assets and liabilities. Following is a description of the valuation methodologies used for the respective financial assets and liabilities measured at fair value.

Available-for-sale marketable securities — except auction rate securities and certain U.S. municipal securities:

Marketable securities, except auction rate securities and certain U.S. municipal securities, are valued utilizing multiple sources. A weighted average price is used for these securities. Market prices are obtained for these securities from a variety of industry standard data providers, security master files from large financial institutions, and other third-party sources. These multiple prices are used as inputs into a distribution-curve-based algorithm to determine the daily fair value to be used. 3M classifies U.S. treasury securities as level 1, while all other marketable securities (excluding auction rate securities and certain U.S. municipal securities) are classified as level 2. Marketable securities are discussed further in Note 8.

Available-for-sale marketable securities — auction rate securities and certain U.S. municipal securities only:

Auction rate securities held by 3M failed to auction since the second half of 2007. As a result, investments in auction rate securities are valued utilizing third-party indicative bid levels in markets that are not active and broker-dealer valuation models that utilize inputs such as current/forward interest rates, current market conditions and credit default swap spreads. 3M classifies these securities as level 3. In the fourth quarter 2014, 3M sold all remaining auction rate securities out of their portfolio and no longer has a balance at December 31, 2014.

In the fourth quarter 2014, 3M obtained a municipal bond with the City of Nevada, Missouri, which represent 3M's only U.S. municipal securities holding as of December 31, 2014. Due to the nature of this security, the valuation method utilized will include the financial health of the City of Nevada, any recent municipal bond issuances by Nevada, and macroeconomic considerations related to the direction of interest rates and the health of the overall municipal bond market, and as such will be classified as a level 3 security. 3M's other U.S. municipal securities holdings at December 31, 2013 were classified as level 2.

Available-for-sale investments:

Investments include equity securities that are traded in an active market. Closing stock prices are readily available from active markets and are used as being representative of fair value. 3M classifies these securities as level 1.

Derivative instruments:

The Company's derivative assets and liabilities within the scope of ASC 815, Derivatives and Hedging, are required to be recorded at fair value. The Company's derivatives that are recorded at fair value include foreign currency forward and option contracts, commodity price swaps, interest rate swaps, and net investment hedges where the hedging instrument is recorded at fair value. Net investment hedges that use foreign currency denominated debt to hedge 3M's net investment are not impacted by the fair value measurement standard under ASC 820, as the debt used as the hedging instrument is marked to a value with respect to changes in spot foreign currency exchange rates and not with respect to other factors that may impact fair value.

3M has determined that foreign currency forwards, commodity price swaps, currency swaps, foreign currency options, interest rate swaps and cross-currency swaps will be considered level 2 measurements. 3M uses inputs other than quoted prices that are observable for the asset. These inputs include foreign currency exchange rates, volatilities, and interest rates. Derivative positions are primarily valued using standard calculations/models that use as their basis readily observable market parameters. Industry standard data providers are 3M's primary source for forward and spot rate information for both interest rates and currency rates, with resulting valuations periodically validated through third-party or counterparty quotes and a net present value stream of cash flows model. The Company revised classification of amounts previously presented in the table below for foreign currency forward/option contracts for the year ended December 31, 2013. These immaterial corrections reclassified previously presented amounts from level 1 to level 2.

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis.

Fair Value Measurements

(Millions)

Fair Value at

Using Inputs Considered as

Description

Dec. 31, 2014

Level 1

Level 2

Level 3

Assets:

Available-for-sale:

Marketable securities:

U.S. government agency securities

$

108

$

―

$

108

$

―

Foreign government agency securities

95

―

95

―

Corporate debt securities

619

―

619

―

Certificates of deposit/time deposits

41

―

41

―

Asset-backed securities:

Automobile loan related

282

―

282

―

Credit card related

162

―

162

―

Equipment lease related

48

―

48

―

Other

46

―

46

―

U.S. treasury securities

38

38

―

―

U.S. municipal securities

15

―

―

15

Investments

1

1

―

―

Derivative instruments — assets:

Foreign currency forward/option contracts

229

―

229

―

Interest rate swap contracts

27

―

27

―

Liabilities:

Derivative instruments — liabilities:

Foreign currency forward/option contracts

36

―

36

―

Commodity price swap contracts

4

―

4

―

Interest rate swap contracts

3

―

3

―

Fair Value Measurements

(Millions)

Fair Value at

Using Inputs Considered as

Description

Dec. 31, 2013

Level 1

Level 2

Level 3

Assets:

Available-for-sale:

Marketable securities:

U.S. government agency securities

$

234

$

―

$

234

$

―

Foreign government agency securities

125

―

125

―

Corporate debt securities

781

―

781

―

Certificates of deposit/time deposits

40

―

40

―

Commercial paper

60

―

60

―

Asset-backed securities:

Automobile loan related

585

―

585

―

Credit card related

180

―

180

―

Equipment lease related

67

―

67

―

Other

75

―

75

―

U.S. treasury securities

49

49

―

―

U.S. municipal securities

2

―

2

―

Auction rate securities

11

―

―

11

Investments

2

2

―

―

Derivative instruments — assets:

Foreign currency forward/option contracts

75

―

75

―

Commodity price swap contracts

1

―

1

―

Interest rate swap contracts

8

―

8

―

Liabilities:

Derivative instruments — liabilities:

Foreign currency forward/option contracts

103

―

103

―

Interest rate swap contracts

7

―

7

―

The following table provides a reconciliation of the beginning and ending balances of items measured at fair value on a recurring basis in the table above that used significant unobservable inputs (level 3).

(Millions)

Marketable securities – auction rate securities and certain U.S. municipal securities only

2014

2013

2012

Beginning balance

$

11

$

7

$

4

Total gains or losses:

Included in earnings

-1

―

―

Included in other comprehensive income

2

4

3

Purchases and issuances

15

―

―

Sales and settlements

-12

―

―

Transfers in and/or out of level 3

―

―

―

Ending balance (December 31)

15

11

7

Change in unrealized gains or losses for the period included in

earnings for securities held at the end of the reporting period

―

―

―

In addition, the plan assets of 3M's pension and postretirement benefit plans are measured at fair value on a recurring basis (at least annually). Refer to Note 10.

Assets and Liabilities that are Measured at Fair Value on a Nonrecurring Basis:

Disclosures are required for certain assets and liabilities that are measured at fair value, but are recognized and disclosed at fair value on a nonrecurring basis in periods subsequent to initial recognition. For 3M, such measurements of fair value relate primarily to long-lived asset impairments. There were no material long-lived asset impairments for 2014, 2013 and 2012.

Fair Value of Financial Instruments:

The Company's financial instruments include cash and cash equivalents, marketable securities, accounts receivable, certain investments, accounts payable, borrowings, and derivative contracts. The fair values of cash and cash equivalents, accounts receivable, accounts payable, and short-term borrowings and current portion of long-term debt (except the Eurobond securities totaling 1.025 billion Euros, which were repaid in July 2014 and are shown separately in the table below) approximated carrying values because of the short-term nature of these instruments. Available-for-sale marketable securities and investments, in addition to certain derivative instruments, are recorded at fair values as indicated in the preceding disclosures. For its long-term debt, the Company utilized third-party quotes to estimate fair values (classified as level 2). Information with respect to the carrying amounts and estimated fair values of these financial instruments follow:

31-Dec-14

31-Dec-13

Carrying

Fair

Carrying

Fair

(Millions)

Value

Value

Value

Value

Eurobond securities (repaid July 2014)

$

―

$

―

$

1,424

$

1,447

Long-term debt, excluding current portion

6,731

7,203

4,326

4,463

The fair values reflected above consider the terms of the related debt absent the impacts of derivative/hedging activity. The carrying amount of long-term debt referenced above is impacted by certain fixed-to-floating interest rate swaps that are designated as fair value hedges and by the designation of fixed rate Eurobond securities issued by the Company as hedging instruments of the Company's net investment in its European subsidiaries. Many of 3M's fixed-rate bonds were trading at a premium at December 31, 2014 and 2013 due to the low interest rates and tightening of 3M's credit spreads.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies
Commitments and Contingencies	NOTE 13. Commitments and Contingencies
	Capital and Operating Leases:
	Rental expense under operating leases was $332 million in 2014, $330 million in 2013 and $300 million in 2012. It is 3M's practice to secure renewal rights for leases, thereby giving 3M the right, but not the obligation, to maintain a presence in a leased facility. 3M has three primary capital leases. First, 3M has a capital lease, which became effective in April 2003, that involves a building in the United Kingdom (with a lease term of 22 years). During the second quarter of 2003, 3M recorded a capital lease asset and obligation of approximately 33.5 million British Pound (GBP), or approximately $52 million at December 31, 2014, exchange rates. Second, during the fourth quarter of 2009, 3M recorded a capital lease asset and obligation of approximately $50 million related to an IT investment with an amortization period of seven years. Third, in the fourth quarter of 2014, 3M recorded a capital lease asset and obligation of approximately $15 million, which is discussed in more detail in Note 6.
	Minimum lease payments under capital and operating leases with non-cancelable terms in excess of one year as of December 31, 2014, were as follows:
			Capital Leases		Operating Leases
	(Millions)
	2015		$	11	$	225
	2016			11		164
	2017			7		126
	2018			4		75
	2019			3		54
	After 2019			37		187
		Total	$	73	$	831
	Less: Amounts representing interest			6
	Present value of future minimum lease payments			67
	Less: Current obligations under capital leases			8
	Long-term obligations under capital leases		$	59
	Unconditional Purchase Obligations:
	Unconditional purchase obligations are defined as an agreement to purchase goods or services that is enforceable and legally binding (non-cancelable, or cancelable only in certain circumstances). The Company estimates its total unconditional purchase obligation commitment (for those contracts with terms in excess of one year) as of December 31, 2014, at $489 million. Payments by year are estimated as follows: 2015 ($131 million), 2016 ($139 million), 2017 ($92 million), 2018 ($55 million), 2019 ($34 million) and after 2019 ($38 million). Many of these commitments relate to take or pay contracts, in which 3M guarantees payment to ensure availability of products or services that are sold to customers. The Company expects to receive consideration (products or services) for these unconditional purchase obligations. The purchase obligation amounts do not represent the entire anticipated purchases in the future, but represent only those items for which the Company is contractually obligated. The majority of 3M's products and services are purchased as needed, with no unconditional commitment. For this reason, these amounts will not provide an indication of the Company's expected future cash outflows related to purchase obligations.
	Warranties/Guarantees:
	3M's accrued product warranty liabilities, recorded on the Consolidated Balance Sheet as part of current and long-term liabilities, are estimated at approximately $30 million at December 31, 2014, and $31 million at December 31, 2013. 3M does not consider this amount to be material. The fair value of 3M guarantees of loans with third parties and other guarantee arrangements are not material.
	Related Party Activity:
	3M does not have any material related party activity that is not in the ordinary course of business.
	Legal Proceedings:
	The Company and some of its subsidiaries are involved in numerous claims and lawsuits, principally in the United States, and regulatory proceedings worldwide. These include various products liability (involving products that the Company now or formerly manufactured and sold), intellectual property, and commercial claims and lawsuits, including those brought under the antitrust laws, and environmental proceedings. Unless otherwise stated, the Company is vigorously defending all such litigation.
	Process for Disclosure and Recording of Liabilities and Insurance Receivables Related to Legal Proceedings
	Many lawsuits and claims involve highly complex issues relating to causation, scientific evidence, and whether there are actual damages and are otherwise subject to substantial uncertainties. Assessments of lawsuits and claims can involve a series of complex judgments about future events and can rely heavily on estimates and assumptions. The Company complies with the requirements of ASC Topic 450, Contingencies, and related guidance, and records liabilities for legal proceedings in those instances where it can reasonably estimate the amount of the loss and where liability is probable. Where the reasonable estimate of the probable loss is a range, the Company records the most likely estimate of the loss, or the low end of the range if there is no one best estimate. The Company either discloses the amount of a possible loss or range of loss in excess of established accruals if estimable, or states that such an estimate cannot be made. The Company discloses significant legal proceedings even where liability is not probable or the amount of the liability is not estimable, or both, if the Company believes there is at least a reasonable possibility that a loss may be incurred.
	The Company estimates insurance receivables based on an analysis of its numerous policies, including their exclusions, pertinent case law interpreting comparable policies, its experience with similar claims, and assessment of the nature of the claim and remaining coverage, and records an amount it has concluded is likely to be recovered. For those insured matters where the Company has taken an accrual, the Company also records receivables for the amount of insurance that it expects to recover under the Company's insurance program. For those insured matters where the Company has not taken an accrual because the liability is not probable or the amount of the liability is not estimable, or both, but where the Company has incurred an expense in defending itself, the Company records receivables for the amount of insurance that it expects to recover for the expense incurred.
	Because litigation is subject to inherent uncertainties, and unfavorable rulings or developments could occur, there can be no certainty that the Company may not ultimately incur charges in excess of presently recorded liabilities. A future adverse ruling, settlement, or unfavorable development could result in future charges that could have a material adverse effect on the Company's results of operations or cash flows in the period in which they are recorded. Although the Company cannot estimate its exposure to all legal proceedings, it currently believes that such future charges, if any, would not have a material adverse effect on the consolidated financial position of the Company. Based on experience and developments, the Company reexamines its estimates of probable liabilities and associated expenses and receivables each period, and whether it is able to estimate a liability previously determined to be not estimable and/or not probable. Where appropriate, the Company makes additions to or adjustments of its estimated liabilities. As a result, the current estimates of the potential impact on the Company's consolidated financial position, results of operations and cash flows for the legal proceedings and claims pending against the Company could change in the future.
	The following sections first describe the significant legal proceedings in which the Company is involved, and then describe the liabilities and associated insurance receivables the Company has accrued relating to its significant legal proceedings.
	Respirator Mask/Asbestos Litigation
	As of December 31, 2014, the Company is a named defendant, with multiple co-defendants, in numerous lawsuits in various courts that purport to represent approximately 2,220 individual claimants, compared to approximately 2,200 individual claimants with actions pending at December 31, 2013.
	The vast majority of the lawsuits and claims resolved by and currently pending against the Company allege use of some of the Company's mask and respirator products and seek damages from the Company and other defendants for alleged personal injury from workplace exposures to asbestos, silica, coal mine dust or other occupational dusts found in products manufactured by other defendants or generally in the workplace. A minority of the lawsuits and claims resolved by and currently pending against the Company generally allege personal injury from occupational exposure to asbestos from products previously manufactured by the Company, which are often unspecified, as well as products manufactured by other defendants, or occasionally at Company premises.
	The Company's current volume of new and pending matters is substantially lower than it experienced at the peak of filings in 2003. The Company expects that filing of claims by unimpaired claimants in the future will continue to be at much lower levels than in the past. Accordingly, the number of claims alleging more serious injuries, including mesothelioma and other malignancies, will represent a greater percentage of total claims than in the past. The Company has prevailed in all nine cases taken to trial, including seven of the eight cases tried to verdict (such trials occurred in 1999, 2000, 2001, 2003, 2004, and 2007), and an appellate reversal in 2005 of the 2001 jury verdict adverse to the Company. The ninth case, tried in 2009, was dismissed by the court at the close of plaintiff's evidence, based on the court's legal finding that the plaintiff had not presented sufficient evidence to support a jury verdict.
	The Company has demonstrated in these past trial proceedings that its respiratory protection products are effective as claimed when used in the intended manner and in the intended circumstances. Consequently the Company believes that claimants are unable to establish that their medical conditions, even if significant, are attributable to the Company's respiratory protection products. Nonetheless the Company's litigation experience indicates that claims of persons with malignant conditions are costlier to resolve than the claims of unimpaired persons, and it therefore believes the average cost of resolving pending and future claims on a per-claim basis will continue to be higher than it experienced in prior periods when the vast majority of claims were asserted by the unimpaired.
	As previously reported, the State of West Virginia, through its Attorney General, filed a complaint in 2003 against the Company and two other manufacturers of respiratory protection products in the Circuit Court of Lincoln County, West Virginia and amended its complaint in 2005. The amended complaint seeks substantial, but unspecified, compensatory damages primarily for reimbursement of the costs allegedly incurred by the State for worker's compensation and healthcare benefits provided to all workers with occupational pneumoconiosis and unspecified punitive damages. The case has been inactive since the fourth quarter of 2007, other than a case management conference in March 2011. In November 2013, the State filed a motion to bifurcate the lawsuit into separate liability and damages proceedings. A hearing on that motion may occur in the first quarter of 2015. No liability has been recorded for this matter because the Company believes that liability is not probable and estimable at this time. In addition, the Company is not able to estimate a possible loss or range of loss given the lack of any meaningful discovery responses by the State of West Virginia, the otherwise minimal activity in this case and the fact that the complaint asserts claims against two other manufacturers where a defendant's share of liability may turn on the law of joint and several liability and by the amount of fault, if any, a jury might allocate to each defendant if the case is ultimately tried.
	Respirator Mask/Asbestos Liabilities and Insurance Receivables: The Company estimates its respirator mask/asbestos liabilities, including the cost to resolve the claims and defense costs, by examining: (i) the Company's experience in resolving claims, (ii) apparent trends, (iii) the apparent quality of claims (e.g., whether the claim has been asserted on behalf of asymptomatic claimants), (iv) changes in the nature and mix of claims (e.g., the proportion of claims asserting usage of the Company's mask or respirator products and alleging exposure to each of asbestos, silica, coal or other occupational dusts, and claims pleading use of asbestos-containing products allegedly manufactured by the Company), (v) the number of current claims and a projection of the number of future asbestos and other claims that may be filed against the Company, (vi) the cost to resolve recently settled claims, and (vii) an estimate of the cost to resolve and defend against current and future claims.
	Developments may occur that could affect the Company's estimate of its liabilities. These developments include, but are not limited to, significant changes in (i) the number of future claims, (ii) the average cost of resolving claims, (iii) the legal costs of defending these claims and in maintaining trial readiness, (iv) changes in the mix and nature of claims received, (v) trial and appellate outcomes, (vi) changes in the law and procedure applicable to these claims, and (vii) the financial viability of other co-defendants and insurers.
	As a result of the Company's greater cost of resolving claims of persons who claim more serious injuries, including mesothelioma and other malignancies, the Company increased its accruals in 2014 for respirator mask/asbestos liabilities by $62 million. In 2014, the Company made payments for fees and settlements of $49 million related to the respirator mask/asbestos litigation. As of December 31, 2014, the Company had accruals for respirator mask/asbestos liabilities of $140 million (excluding Aearo accruals). This accrual represents the low end in a range of loss. The Company cannot estimate the amount or upper end of the range of amounts by which the liability may exceed the accrual the Company has established because of the (i) inherent difficulty in projecting the number of claims that have not yet been asserted or the time period in which future claims may be asserted, (ii) the complaints nearly always assert claims against multiple defendants where the damages alleged are typically not attributed to individual defendants so that a defendant's share of liability may turn on the law of joint and several liability, which can vary by state, (iii) the multiple factors described above that the Company considers in estimating its liabilities, and (iv) the several possible developments described above that may occur that could affect the Company's estimate of liabilities.
	As of December 31, 2014, the Company's receivable for insurance recoveries related to the respirator mask/asbestos litigation was $41 million. The Company estimates insurance receivables based on an analysis of its policies, including their exclusions, pertinent case law interpreting comparable policies, its experience with similar claims, and assessment of the nature of each claim and remaining coverage, and then records an amount it has concluded is likely to be recovered. Various factors could affect the timing and amount of recovery of this receivable, including (i) delays in or avoidance of payment by insurers; (ii) the extent to which insurers may become insolvent in the future, and (iii) the outcome of negotiations with insurers and legal proceedings with respect to respirator mask/asbestos liability insurance coverage.
	As previously reported, in 2007 the Company was served with a declaratory judgment action filed in the District Court in Ramsey County, Minnesota on behalf of two of its insurers (Continental Casualty and Continental Insurance Co. – both part of the Continental Casualty Group) in connection with insurance coverage for respirator mask/asbestos claims. Over the next several years, 3M settled with the plaintiffs, Continental Casualty and Continental Insurance Co., as well as a significant number of the insurer defendants. In 2013, the Company reached settlements with the remaining insurers in the lawsuit. In June 2014, the court issued an order dismissing the case, and in the third quarter of 2014, a final payment was received as a result of those settlements. During 2014, the Company received payments of $17 million from settlements with insurers.
	The Company has unresolved coverage with claims-made carriers for respirator mask claims. The Company is also seeking coverage under the policies of certain insolvent insurers. Once those claims for coverage are resolved, the Company will have collected substantially all of its remaining insurance coverage for respirator mask/asbestos claims.
	Respirator Mask/Asbestos Litigation – Aearo Technologies
	On April 1, 2008, a subsidiary of the Company purchased the stock of Aearo Holding Corp., the parent of Aearo Technologies (“Aearo”). Aearo manufactured and sold various products, including personal protection equipment, such as eye, ear, head, face, fall and certain respiratory protection products.
	As of December 31, 2014, Aearo and/or other companies that previously owned and operated Aearo's respirator business (American Optical Corporation, Warner-Lambert LLC, AO Corp. and Cabot Corporation (“Cabot”)) are named defendants, with multiple co-defendants, including the Company, in numerous lawsuits in various courts in which plaintiffs allege use of mask and respirator products and seek damages from Aearo and other defendants for alleged personal injury from workplace exposures to asbestos, silica-related, or other occupational dusts found in products manufactured by other defendants or generally in the workplace.
	As of December 31, 2014, the Company, through its Aearo subsidiary, had accruals of $24 million for product liabilities and defense costs related to current and future Aearo-related asbestos and silica-related claims. Responsibility for legal costs, as well as for settlements and judgments, is currently shared in an informal arrangement among Aearo, Cabot, American Optical Corporation and a subsidiary of Warner Lambert and their insurers (the “Payor Group”). Liability is allocated among the parties based on the number of years each company sold respiratory products under the “AO Safety” brand and/or owned the AO Safety Division of American Optical Corporation and the alleged years of exposure of the individual plaintiff. Aearo's share of the contingent liability is further limited by an agreement entered into between Aearo and Cabot on July 11, 1995. This agreement provides that, so long as Aearo pays to Cabot a quarterly fee of $100,000, Cabot will retain responsibility and liability for, and indemnify Aearo against, any product liability claims involving exposure to asbestos, silica, or silica products for respirators sold prior to July 11, 1995. Because of the difficulty in determining how long a particular respirator remains in the stream of commerce after being sold, Aearo and Cabot have applied the agreement to claims arising out of the alleged use of respirators involving exposure to asbestos, silica or silica products prior to January 1, 1997. With these arrangements in place, Aearo's potential liability is limited to exposures alleged to have arisen from the use of respirators involving exposure to asbestos, silica, or silica products on or after January 1, 1997. To date, Aearo has elected to pay the quarterly fee. Aearo could potentially be exposed to additional claims for some part of the pre-July 11, 1995 period covered by its agreement with Cabot if Aearo elects to discontinue its participation in this arrangement, or if Cabot is no longer able to meet its obligations in these matters.
	In March 2012, Cabot CSC Corporation and Cabot Corporation filed a lawsuit against Aearo in the Superior Court of Suffolk County, Massachusetts seeking declaratory relief as to the scope of Cabot's indemnity obligations under the July 11, 1995 agreement, including whether Cabot has retained liability for coal workers' pneumoconiosis claims, and seeking damages for breach of contract. In June 2014, the court granted Aearo's motion for summary judgment on all claims. Cabot has filed a motion for reconsideration, and Aearo has filed a motion for clarification of the court's order granting Aearo summary judgment. In October 2014, the court denied Aearo's motion for clarification. The court also denied, in part, Cabot's motion for reconsideration and reaffirmed its ruling that Cabot retained liability for claims involving exposure to silica in coal mine dust. The court granted Cabot's motion, in part, ruling that Aearo was not entitled to summary judgment on Cabot's claim for equitable allocation, and on whether the 258 underlying claims were Cabot's responsibility. These two issues remain in the case for further proceedings.
	Developments may occur that could affect the estimate of Aearo's liabilities. These developments include, but are not limited to: (i) significant changes in the number of future claims, (ii) significant changes in the average cost of resolving claims, (iii) significant changes in the legal costs of defending these claims, (iv) significant changes in the mix and nature of claims received, (v) trial and appellate outcomes, (vi) significant changes in the law and procedure applicable to these claims, (vii) significant changes in the liability allocation among the co-defendants, (viii) the financial viability of members of the Payor Group including exhaustion of available coverage limits, and/or (ix) a determination that the interpretation of the contractual obligations on which Aearo has estimated its share of liability is inaccurate. The Company cannot determine the impact of these potential developments on its current estimate of Aearo's share of liability for these existing and future claims. If any of the developments described above were to occur, the actual amount of these liabilities for existing and future claims could be significantly larger than the amount accrued.
	Because of the inherent difficulty in projecting the number of claims that have not yet been asserted, the complexity of allocating responsibility for future claims among the Payor Group, and the several possible developments that may occur that could affect the estimate of Aearo's liabilities, the Company cannot estimate the amount or range of amounts by which Aearo's liability may exceed the accrual the Company has established.
	Environmental Matters and Litigation
	The Company's operations are subject to environmental laws and regulations including those pertaining to air emissions, wastewater discharges, toxic substances, and the handling and disposal of solid and hazardous wastes enforceable by national, state, and local authorities around the world, and private parties in the United States and abroad. These laws and regulations provide, under certain circumstances, a basis for the remediation of contamination, for restoration of or compensation for damages to natural resources, and for personal injury and property damage claims. The Company has incurred, and will continue to incur, costs and capital expenditures in complying with these laws and regulations, defending personal injury and property damage claims, and modifying its business operations in light of its environmental responsibilities. In its effort to satisfy its environmental responsibilities and comply with environmental laws and regulations, the Company has established, and periodically updates, policies relating to environmental standards of performance for its operations worldwide.
	Under certain environmental laws, including the United States Comprehensive Environmental Response, Compensation and Liability Act of 1980 and similar state laws, the Company may be jointly and severally liable, typically with other companies, for the costs of remediation of environmental contamination at current or former facilities and at off-site locations. The Company has identified numerous locations, most of which are in the United States, at which it may have some liability. Please refer to the section entitled “Environmental Liabilities and Insurance Receivables” that follows for information on the amount of the accrual.
	Environmental Matters
	As previously reported, the Company has been voluntarily cooperating with ongoing reviews by local, state, federal (primarily the U.S. Environmental Protection Agency (EPA)), and international agencies of possible environmental and health effects of various perfluorinated compounds (“PFCs”), including perfluorooctanyl compounds such as perfluorooctanoate (“PFOA”) and perfluorooctane sulfonate (“PFOS”). As a result of its phase-out decision in May 2000, the Company no longer manufactures perfluorooctanyl compounds. The company ceased manufacturing and using the vast majority of these compounds within approximately two years of the phase-out announcement, and ceased all manufacturing and the last significant use of this chemistry by the end of 2008. Through its ongoing life cycle management and its raw material composition identification processes associated with the Company's policies covering the use of all persistent and bio-accumulative materials, the Company has on occasion identified the presence of precursor chemicals in materials received from suppliers that may ultimately degrade to PFOA, PFOS, or similar compounds. Upon such identification, the Company works to find alternatives for such materials.
	Regulatory activities concerning PFOA and/or PFOS continue in the United States, Europe and elsewhere, and before certain international bodies. These activities include gathering of exposure and use information, risk assessment, and consideration of regulatory approaches. As the database of studies of both chemicals has expanded, the EPA has developed draft human health effects documents summarizing the available data from these studies. In February 2014, the EPA initiated external peer review of its draft human health effects documents for PFOA and PFOS. The peer review panel met in August 2014. The EPA has stated that following the peer review process it will revise its health effects documents and use them to establish lifetime health advisories for PFOS and PFOA in drinking water. Lifetime health advisories, while not enforceable, serve as guidance and are benchmarks for determining if concentrations of chemicals in tap water from public utilities are safe for public consumption. Once finalized, the EPA stated that the lifetime health advisories are expected to supersede the provisional health advisories for PFOA and PFOS in drinking water issued by the EPA in 2009 – currently at 0.4 micrograms per liter for PFOA and 0.2 micrograms per liter for PFOS. In an effort to collect exposure information under the Safe Drinking Water Act, the EPA published on May 2, 2012 a list of unregulated substances, including six PFCs, required to be monitored during the period 2013-2015 by public water system suppliers to determine the extent of their occurrence.
	The Company is continuing to make progress in its work, under the supervision of state regulators, to address its historic disposal of PFC-containing waste associated with manufacturing operations at the Decatur, Alabama, Cottage Grove, Minnesota, and Cordova, Illinois plants.
	As previously reported, the Company entered into a voluntary remedial action agreement with the Alabama Department of Environmental Management (ADEM) to address the presence of PFCs in the soil at the Company's manufacturing facility in Decatur, Alabama. Pursuant to a permit issued by ADEM, for approximately twenty years, the Company incorporated its wastewater treatment plant sludge containing PFCs in fields at its Decatur facility. After a review of the available options to address the presence of PFCs in the soil, ADEM agreed that the preferred remediation option is to use a multilayer cap over the former sludge incorporation areas on the manufacturing site with subsequent groundwater migration controls and treatment. Implementation of that option will continue and is expected to be completed in 2018.
	The Company continues to work with the Minnesota Pollution Control Agency (MPCA) pursuant to the terms of the previously disclosed May 2007 Settlement Agreement and Consent Order to address the presence of certain PFCs in the soil and groundwater at former disposal sites in Washington County, Minnesota (Oakdale and Woodbury) and at the Company's manufacturing facility at Cottage Grove, Minnesota. Under this agreement, the Company's principal obligations include (i) evaluating releases of certain PFCs from these sites and proposing response actions; (ii) providing treatment or alternative drinking water upon identifying any level exceeding a Health Based Value (“HBV”) or Health Risk Limit (“HRL”) (i.e., the amount of a chemical in drinking water determined by the Minnesota Department of Health (MDH) to be safe for human consumption over a lifetime) for certain PFCs for which a HBV and/or HRL exists as a result of contamination from these sites; (iii) remediating identified sources of other PFCs at these sites that are not controlled by actions to remediate PFOA and PFOS; and (iv) sharing information with the MPCA about certain perfluorinated compounds. During 2008, the MPCA issued formal decisions adopting remedial options for the former disposal sites in Washington County, Minnesota (Oakdale and Woodbury). In August 2009, the MPCA issued a formal decision adopting remedial options for the Company's Cottage Grove manufacturing facility. During the spring and summer of 2010, 3M began implementing the agreed upon remedial options at the Cottage Grove and Woodbury sites. 3M commenced the remedial option at the Oakdale site in late 2010. At each location the remedial options were recommended by the Company and approved by the MPCA. Remediation work has been completed at the Oakdale and Woodbury sites, and they are in an operational maintenance mode. Remediation will continue at the Cottage Grove site during 2015.
	In February 2014, the Company submitted its most recent environmental assessment report to the Illinois Environmental Protection Agency summarizing the levels of PFCs in the soil, groundwater and surface water at or near its manufacturing facility in Cordova, Illinois. The Company will continue to monitor PFCs at the site and is engaged in discussions with the Illinois EPA concerning next steps for the site. In August 2014, the Illinois EPA approved a request by the Company to establish a groundwater management zone at the site, which includes ongoing pumping of impacted site groundwater, groundwater monitoring and routine reporting of results.
	The Company cannot predict what additional regulatory actions arising from the foregoing proceedings and activities, if any, may be taken regarding such compounds or the consequences of any such actions.
	Environmental Litigation
	As previously reported, a former employee filed a purported class action lawsuit in 2002 in the Circuit Court of Morgan County, Alabama, seeking unstated damages and alleging that the plaintiffs suffered fear, increased risk, subclinical injuries, and property damage from exposure to certain perfluorochemicals at or near the Company's Decatur, Alabama, manufacturing facility. The court in 2005 granted the Company's motion to dismiss the named plaintiff's personal injury-related claims on the basis that such claims are barred by the exclusivity provisions of the state's Workers Compensation Act. The plaintiffs' counsel filed an amended complaint in November 2006, limiting the case to property damage claims on behalf of a purported class of residents and property owners in the vicinity of the Decatur plant.
	Also, in 2005, the judge in a second purported class action lawsuit (filed by three residents of Morgan County, Alabama, seeking unstated compensatory and punitive damages involving alleged damage to their property from emissions of certain perfluorochemical compounds from the Company's Decatur, Alabama, manufacturing facility that formerly manufactured those compounds) granted the Company's motion to abate the case, effectively putting the case on hold pending the resolution of class certification issues in the first action described above, filed in the same court in 2002. Despite the stay, plaintiffs filed an amended complaint seeking damages for alleged personal injuries and property damage on behalf of the named plaintiffs and the members of a purported class. No further action in the case is expected unless and until the stay is lifted.
	In February 2009, a resident of Franklin County, Alabama, filed a purported class action lawsuit in the Circuit Court of Franklin County seeking compensatory damages and injunctive relief based on the application by the Decatur utility's wastewater treatment plant of wastewater treatment sludge to farmland and grasslands in the state that allegedly contain PFOA, PFOS and other perfluorochemicals. The named defendants in the case include 3M, Daikin America, Inc., Synagro-WWT, Inc., Synagro South, LLC, and Biological Processors of America. The named plaintiff seeks to represent a class of all persons within the State of Alabama who have had PFOA, PFOS, and other perfluorochemicals released or deposited on their property. In March 2010, the Alabama Supreme Court ordered the case transferred from Franklin County to Morgan County. In May 2010, consistent with its handling of the other matters, the Morgan County Circuit Court abated this case, putting it on hold pending the resolution of the class certification issues in the first case filed there. In May 2013, the court stayed the case due to co-defendant Synagro's bankruptcy filing. Pursuant to directions from the Morgan County court, on December 31, 2014, the parties reported that the Synagro Chapter 11 bankruptcy case was concluded and closed in September 2014. The parties will request a status conference with the Morgan County court in the first half of 2015.
In December 2010, the State of Minnesota, by its Attorney General Lori Swanson, acting in its capacity as trustee of the natural resources of the State of Minnesota, filed a lawsuit in Hennepin County District Court against 3M to recover damages (including unspecified assessment costs and reasonable attorney's fees) for alleged injury to, destruction of, and loss of use of certain of the State's natural resources under the Minnesota Environmental Response and Liability Act (MERLA) and the Minnesota Water Pollution Control Act (MWPCA), as well as statutory nuisance and common law claims of trespass, nuisance, and negligence with respect to the presence of PFCs in the groundwater, surface water, fish or other aquatic life, and sediments (the “NRD Lawsuit”). The State also seeks declarations under MERLA that 3M is responsible for all damages the State may suffer in the future for injuries to natural resources from releases of PFCs into the environment, and under MWPCA that 3M is responsible for compensation for future loss or destruction of fish, aquatic life, and other damages.
In November 2011, the Metropolitan Council filed a motion to intervene and a complaint in the NRD Lawsuit seeking compensatory damages and other legal, declaratory and equitable relief, including reasonable attorneys' fees, for costs and fees that the Metropolitan Council alleges it will be required to assess at some time in the future if the MPCA imposes restrictions on Metropolitan Council's PFOS discharges to the Mississippi River, including the installation and maintenance of a water treatment system. The Metropolitan Council's intervention motion was based on several theories, including common law negligence, and statutory claims under MERLA for response costs, and under the Minnesota Environmental Rights Act (MERA) for declaratory and equitable relief against 3M for PFOS and other PFC pollution of the waters and sediments of the Mississippi River. 3M did not object to the motion to intervene. In January 2012, 3M answered the Metropolitan Council's complaint and filed a counterclaim alleging that the Metropolitan Council discharges PFCs to the Mississippi River and discharges PFC-containing sludge and bio solids from one or more of its wastewater treatment plants onto agricultural lands and local area landfills. Accordingly, 3M requested that if the court finds that the State is entitled to any of the damages the State seeks, 3M seeks contribution and apportionment from the Metropolitan Council, including attorneys' fees, under MERLA, and contribution from and liability for the Metropolitan Council's proportional share of damages awarded to the State under the MWPCA, as well as under statutory nuisance and common law theories of trespass, nuisance, and negligence. 3M also seeks declaratory relief under MERA.
In April 2012, 3M filed a motion to disqualify the State of Minnesota's counsel, Covington & Burling, LLP (Covington). In October 2012, the court granted 3M's motion to disqualify Covington as counsel to the State and the State and Covington appealed the court's disqualification to the Minnesota Court of Appeals. In July 2013, the Minnesota Court of Appeals affirmed the district court's disqualification order. In October 2013, the Minnesota Supreme Court granted both the State's and Covington's petition for review of the decision of the Minnesota Court of Appeals. In April 2014, the Minnesota Supreme Court affirmed in part, reversed in part, and remanded the case to the district court for further proceedings. In a separate but related action, the Company filed suit against Covington for breach of its fiduciary duties to the Company and for breach of contract arising out of Covington's representation of the State of Minnesota in the NRD Lawsuit.
The State of New Jersey filed suit in 2005 against Occidental Chemical Corporation, Tierra Solutions Inc., Maxus Energy Corporation and five other companies seeking cleanup and removal costs and other damages associated with the presence of dioxin and other hazardous substances in the sediment of a 17-mile stretch of the Passaic River in New Jersey. In June 2009, the Company, along with more than 250 other companies, was served with a third-party complaint by Tierra Solutions Inc. and Maxus Energy Corporation seeking contribution towards the cost and damages asserted or incurred for investigation and remediation of discharges to the Passaic River. The third-party complaint seeks to spread those costs among the third-party defendants, including 3M. Allegations asserted against 3M relate to its use of two commercial drum conditioning facilities in New Jersey. In March 2013, 3M and other third party defendants entered into a settlement agreement with the state of New Jersey for an amount that is not material to 3M. In December 2013, the court approved the settlement and entered the Consent Judgment. The settlement resolves claims or potential claims by the State of New Jersey regarding discharges or alleged discharges into the Passaic River by the settling parties, and precludes certain cost recovery actions by the third-party plaintiffs. The settlement with the State of New Jersey does not include release from potential federal claims yet to be asserted. Total costs for the remedy currently proposed by EPA could easily exceed $1 billion. While the Company does not yet have a basis for estimating its potential exposure in the yet to be asserted EPA claim, the Company currently believes its allocable share of the possible loss, if any, is likely to be a fraction of one percent of the total costs because of the Company's limited potential involvement at this site.
For environmental litigation matters described in this section for which a liability, if any, has been recorded, the Company believes the amount recorded, as well as the possible loss or range of loss in excess of the established accrual is not material to the Company's consolidated results of operations or financial condition. For those matters for which a liability has not been recorded, the Company believes such liability is not probable and estimable and the Company is not able to estimate a possible loss or range of loss at this time, with the exception of the Passaic River litigation, where the Company's potential exposure, if any, is likely to be a fraction of one percent of the total costs.
Environmental Liabilities and Insurance Receivables
As of December 31, 2014, the Company had recorded liabilities of $28 million for estimated “environmental remediation” costs based upon an evaluation of currently available facts with respect to each individual site and also recorded related insurance receivables of $11 million. The Company records liabilities for remediation costs on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies or the Company's commitment to a plan of action. Liabilities for estimated costs of environmental remediation, depending on the site, are based primarily upon internal or third-party environmental studies, and estimates as to the number, participation level and financial viability of any other potentially responsible parties, the extent of the contamination and the nature of required remedial actions. The Company adjusts recorded liabilities as further information develops or circumstances change. The Company expects that it will pay the amounts recorded over the periods of remediation for the applicable sites, currently ranging up to 20 years.
As of December 31, 2014, the Company had recorded liabilities of $43 million for “other environmental liabilities” based upon an evaluation of currently available facts to implement the Settlement Agreement and Consent Order with the MPCA, the remedial action agreement with ADEM, and to address trace amounts of perfluorinated compounds in drinking water sources in the City of Oakdale, Minnesota, as well as presence in the soil and groundwater at the Company's manufacturing facilities in Decatur, Alabama, and Cottage Grove, Minnesota, and at two former disposal sites in Washington County, Minnesota (Oakdale and Woodbury). The Company expects that most of the spending will occur over the next four years. As of December 31, 2014, the Company's receivable for insurance recoveries related to “other environmental liabilities” was $15 million.
It is difficult to estimate the cost of environmental compliance and remediation given the uncertainties regarding the interpretation and enforcement of applicable environmental laws and regulations, the extent of environmental contamination and the existence of alternative cleanup methods. Developments may occur that could affect the Company's current assessment, including, but not limited to: (i) changes in the information available regarding the environmental impact of the Company's operations and products; (ii) changes in environmental regulations, changes in permissible levels of specific compounds in drinking water sources, or changes in enforcement theories and policies, including efforts to recover natural resource damages; (iii) new and evolving analytical and remediation techniques; (iv) success in allocating liability to other potentially responsible parties; and (v) the financial viability of other potentially responsible parties and third-party indemnitors. For sites included in both “environmental remediation liabilities” and “other environmental liabilities,” at which remediation activity is largely complete and remaining activity relates primarily to operation and maintenance of the remedy, including required post-remediation monitoring, the Company believes the exposure to loss in excess of the amount accrued would not be material to the Company's consolidated results of operations or financial condition. However, for locations at which remediation activity is largely ongoing, the Company cannot estimate a possible loss or range of loss in excess of the associated established accruals for the reasons described above.
Other Matters
Commercial Litigation
In October 2012, four plaintiffs filed purported class actions against Ceradyne, Inc., its directors, 3M, and Cyborg Acquisition Corporation (a direct wholly owned subsidiary of 3M) in connection with 3M's proposed acquisition of Ceradyne. Two suits were filed in California Superior Court for Orange County, and two were filed in the Delaware Chancery Court. The suits alleged that the defendants breached and/or aided and abetted the breach of their fiduciary duties to Ceradyne by seeking to sell Ceradyne through an allegedly unfair process and for an unfair price and on unfair terms, and/or by allegedly failing to make adequate disclosures to Ceradyne stockholders regarding the acquisition of Ceradyne. 3M completed its acquisition of Ceradyne in November 2012. In November 2012, the parties reached a settlement with the California plaintiffs for an amount that is not material to the Company, while the Delaware plaintiffs dismissed their complaints without prejudice. The settlement will bind all former Ceradyne shareholders and has received preliminary approval from the California court. A final approval hearing was held in July 2013, and the California court denied approval of the settlement. The plaintiffs filed a motion for reconsideration of the denial of approval of the settlement, which motion was denied by the California court. The plaintiffs then filed a motion for leave to amend their complaint, which motion was denied without prejudice in January 2014. By stipulation in February 2014, plaintiffs agreed to voluntarily dismiss claims against 3M and Cyborg Acquisition Corporation without prejudice. In March 2014, the court entered its Order dismissing 3M and Cyborg Acquisition Corporation from the action without prejudice. The lawsuit against Ceradyne, Inc., and its directors is proceeding. These defendants moved to dismiss plaintiffs' amended complaint, which motion was denied in January 2015.
3M sued TransWeb Corporation in Minnesota in 2010 for infringement of several 3M patents covering fluorination and hydrocharging of filter media used in 3M's respirators and furnace filters. TransWeb does not make finished goods, but sells filter media to competitors of 3M's respirator and furnace filter businesses. TransWeb filed a declaratory judgment action in and successfully moved the litigation to the U.S. District Court for the District of New Jersey, seeking a declaration of invalidity and non-infringement of 3M's patents, and further alleging that 3M waited too long to enforce its rights. TransWeb also alleged 3M obtained the patents through inequitable conduct and that 3M's attempt to enforce the patents constituted a violation of the antitrust laws. In November 2012, a jury returned a verdict in favor of TransWeb on all but one count, including findings that 3M's patents were invalid and not infringed, and that 3M had committed an antitrust violation by seeking to enforce a patent it had obtained fraudulently. The jury also recommended that the court find 3M had committed inequitable conduct in obtaining the patents, and that the patents were therefore unenforceable. Since the vast majority of TransWeb's claim for treble antitrust damages was in the form of its attorneys' fees and expenses in connection with the defense of the patent case, the parties agreed that the measure of damages would not go to the jury, but rather would be submitted to a special master after the trial. The special master's recommendations were forwarded to the court in September 2013. On April 21, 2014, the court issued an order denying 3M's motions to set aside the jury's verdict. In addition, the court found two 3M patents unenforceable due to inequitable conduct. The court accepted the Special Master's recommendation as to the amount of attorneys' fees to be awarded as damages, and entered judgment against 3M in the amount of approximately $26 million. In July 2014, 3M filed a notice of appeal of the judgment to the U.S. Court of Appeals for the Federal Circuit. The parties' briefing is underway. Oral argument is expected in May or June 2015, with a decision to follow thereafter.
For commercial litigation matters described in this section, no liability has been recorded since the Company believes that such liability is not probable and estimable and the Company is not able to estimate a possible loss or range of loss at this time, with the exception of the TransWeb matter, where the Company's range of potential exposure, if any, could be approximately $26 million.
Product Liability Litigation
Électricité de France (EDF) filed a lawsuit against 3M France in the French courts in 2006 claiming commercial loss and property damage after experiencing electrical network failures which EDF claims were caused by allegedly defective 3M transition splices. The French Court of Appeals at Versailles affirmed the commercial trial court's decision that the transition splices conformed to contract specifications and that EDF thoroughly analyzed and tested the splices before purchase and installation. The Court of Appeals, however, ordered a court-appointed expert to study the problem and issue a technical opinion on the cause of the network failures. The court-appointed expert submitted his report to the commercial court in May 2014. The expert found potential defects in 3M's product and found that EDF incurred damages in excess of 100 million Euros. The expert's opinion is not dispositive of liability or damages and is subject to numerous factual and legal challenges that will be raised with the court. The commercial court may take from six months to one year to render its decision.
One customer obtained an order in the French courts against 3M Purification SAS (a French subsidiary) in October 2011 appointing an expert to determine the amount of commercial loss and property damage allegedly caused by allegedly defective 3M filters used in the customer's manufacturing process. An Austrian subsidiary of this same customer also filed a claim against 3M Austria GmbH (an Austrian subsidiary) and 3M Purification SAS in the Austrian courts in September 2012 seeking damages for the same issue. Another customer filed a lawsuit against 3M Deutschland GmbH (a German subsidiary) in the German courts in March 2012 seeking commercial loss and property damage allegedly caused by the same 3M filters used in that customer's manufacturing process. The Company has resolved on an amicable basis claims of two other customers arising out of the same issue for an amount that is not material to the Company's consolidated results of operations or financial condition.
For product liability litigation matters described in this section for which a liability has been recorded, the Company believes the amount recorded is not material to the Company's consolidated results of operations or financial condition. In addition, the Company is not able to estimate a possible loss or range of loss in excess of the established accruals at this time.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Stock-Based Compensation
Stock-Based Compensation	NOTE 14. Stock-Based Compensation
	The 3M 2008 Long-Term Incentive Plan provides for the issuance or delivery of up to 100 million shares of 3M common stock (including additional shareholder approvals subsequent to 2008) pursuant to awards granted under the plan. Awards under this plan may be issued in the form of incentive stock options, nonqualified stock options, progressive stock options, stock appreciation rights, restricted stock, restricted stock units, other stock awards, and performance units and performance shares. Awards denominated in shares of common stock other than options and stock appreciation rights, per the 2008 Plan, count against the 100 million share limit as 3.38 shares for every one share covered by such award (for full value awards with grant dates prior to May 11, 2010), as 2.87 shares for every one share covered by such award (for full value awards with grant dates on or after May 11, 2010, and prior to May 8, 2012), or as 3.50 shares for every one share covered by such award (for full value awards with grant dates of May 8, 2012 or later). The remaining total shares available for grant under the 2008 Long Term Incentive Plan Program are 28,293,674 as of December 31, 2014. There were approximately 9,525 participants with outstanding options, restricted stock, or restricted stock units at December 31, 2014.
	The Company's annual stock option and restricted stock unit grant is made in February to provide a strong and immediate link between the performance of individuals during the preceding year and the size of their annual stock compensation grants. The grant to eligible employees uses the closing stock price on the grant date. Accounting rules require recognition of expense under a non-substantive vesting period approach, requiring compensation expense recognition when an employee is eligible to retire. Employees are considered eligible to retire at age 55 and after having completed five years of service. This retiree-eligible population represents 33 percent of the 2014 annual stock-based compensation award expense dollars; therefore, higher stock-based compensation expense is recognized in the first quarter. 3M also has granted progressive (reload) options. These options are nonqualified stock options that were granted to certain participants under the 1997 or 2002 Management Stock Ownership Program, but for which the reload feature was eliminated in 2005 (on a prospective basis only).
	In addition to the annual grants, the Company makes other minor grants of stock options, restricted stock units and other stock-based grants. The Company issues cash settled restricted stock units and stock appreciation rights in certain countries. These grants do not result in the issuance of common stock and are considered immaterial by the Company.
	Amounts recognized in the financial statements with respect to stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees' Stock Purchase Plan (GESPP), are provided in the following table. Capitalized stock-based compensation amounts were not material for the years ended 2014, 2013 and 2012.
	Stock-Based Compensation Expense
			Years ended December 31
	(Millions)		2014			2013			2012
	Cost of sales		$	47		$	27		$	27
	Selling, general and administrative expenses			192			183			167
	Research, development and related expenses			41			30			29
	Stock-based compensation expenses		$	280		$	240		$	223
	Income tax benefits		$	-79		$	-71		$	-67
	Stock-based compensation expenses, net of tax		$	201		$	169		$	156
	Stock Option Program
	The following table summarizes stock option activity for the years ended December 31:
					2014					2013					2012
					Number of Options		Weighted Average Exercise Price			Number of Options		Weighted Average Exercise Price			Number of Options		Weighted Average Exercise Price
	Under option —
		January 1			43,938,778		$	83.84		56,565,030		$	80.33		64,148,415		$	77.28
		Granted:
			Annual		5,736,183			126.77		6,220,810			101.55		5,770,190			87.91
			Progressive (Reload)		―			―		140,447			109.83		110,065			89.65
			Other		―			―		191			119.62		51,661			89.25
		Exercised			-10,219,261			82.37		-18,825,218			79.25		-13,123,617			68.78
		Canceled			-220,143			105.11		-162,482			89.92		-391,684			83.65
		31-Dec			39,235,557		$	90.38		43,938,778		$	83.84		56,565,030		$	80.33
	Options exercisable
		31-Dec			27,502,208		$	81.42		32,038,228		$	79.58		45,207,143		$	78.78
	Stock options vest over a period from one to three years with the expiration date at 10 years from date of grant. Outstanding options under grant include grants from previous plans. As of December 31, 2014, there was $59 million of compensation expense that has yet to be recognized related to non-vested stock option based awards. This expense is expected to be recognized over the remaining weighted-average vesting period of 21 months. For options outstanding at December 31, 2014, the weighted-average remaining contractual life was 65 months and the aggregate intrinsic value was $2.901 billion. For options exercisable at December 31, 2014, the weighted-average remaining contractual life was 50 months and the aggregate intrinsic value was $2.280 billion.
	The total intrinsic values of stock options exercised during 2014, 2013 and 2012 was $615 million, $562 million and $282 million, respectively. Cash received from options exercised during 2014, 2013 and 2012 was $842 million, $1.492 billion and $903 million, respectively. The Company's actual tax benefits realized for the tax deductions related to the exercise of employee stock options for 2014, 2013 and 2012 was $226 million, $208 million and $98 million, respectively.
	The Company does not have a specific policy to repurchase common shares to mitigate the dilutive impact of options; however, the Company has historically made adequate discretionary purchases, based on cash availability, market trends, and other factors, to satisfy stock option exercise activity.
	For annual and progressive (reload) options, the weighted average fair value at the date of grant was calculated using the Black-Scholes option-pricing model and the assumptions that follow. As discussed earlier, the progressive (reload) feature was eliminated in 2005, resulting in no activity in the below table for 2014 and thereafter.
	Stock Option Assumptions
			Annual												Progressive (Reload)
			2014				2013				2012				2014				2013			2012
	Exercise price		$	126.72			$	101.49			$	87.89			$	―			$	109.84		$	87.89
	Risk-free interest rate			1.9	%			1.2	%			1.1	%			―	%			0.2	%		0.2	%
	Dividend yield			2.6	%			2.7	%			2.6	%			―	%			2.7	%		2.6	%
	Volatility			20.8	%			20	%			24.5	%			―	%			16.3	%		23.4	%
	Expected life (months)			75				75				74				―				12			19
	Black-Scholes fair value		$	19.63			$	13.46			$	14.94			$	―			$	6.42		$	8.5
	Expected volatility is a statistical measure of the amount by which a stock price is expected to fluctuate during a period. For the 2014 annual grant date, the Company estimated the expected volatility based upon the average of the most recent one year volatility, the median of the term of the expected life rolling volatility, the median of the most recent term of the expected life volatility of 3M stock, and the implied volatility on the grant date. The expected term assumption is based on the weighted average of historical grants.
	Restricted Stock and Restricted Stock Units
	The following table summarizes restricted stock and restricted stock unit activity for the years ended December 31:
						2014					2013					2012
								Weighted Average					Weighted Average					Weighted Average
						Number of		Grant Date			Number of		Grant Date			Number of		Grant Date
						Awards		Fair Value			Awards		Fair Value			Awards		Fair Value
	Nonvested balance —
		As of January 1				3,105,361		$	92.31		3,261,562		$	85.17		4,858,972		$	73.02
			Granted
				Annual		798,615			126.79		946,774			101.57		968,522			87.92
				Other		78,252			152.74		44,401			111.19		99,337			85.07
			Vested			-1,100,675			90.37		-1,100,095			79.93		-2,594,468			63.51
			Forfeited			-63,767			97.23		-47,281			90.82		-70,801			82.65
		As of December 31				2,817,786		$	104.41		3,105,361		$	92.31		3,261,562		$	85.17
	As of December 31, 2014, there was $84 million of compensation expense that has yet to be recognized related to non-vested restricted stock and restricted stock units. This expense is expected to be recognized over the remaining weighted-average vesting period of 26 months. The total fair value of restricted stock and restricted stock units that vested during the years ended December 31, 2014, 2013 and 2012 was $145 million, $114 million and $228 million, respectively. The Company's actual tax benefits realized for the tax deductions related to the vesting of restricted stock and restricted stock units for the years ended December 31, 2014, 2013 and 2012 was $54 million, $43 million and $86 million, respectively.
	Restricted stock units granted under the 3M 2008 Long-Term Incentive Plan generally vest three years following the grant date assuming continued employment. Dividend equivalents equal to the dividends payable on the same number of shares of 3M common stock accrue on these restricted stock units during the vesting period, although no dividend equivalents are paid on any of these restricted stock units that are forfeited prior to the vesting date. Dividends are paid out in cash at the vest date on restricted stock units, except for performance shares which do not earn dividends. Since the rights to dividends are forfeitable, there is no impact on basic earnings per share calculations. Weighted average restricted stock unit shares outstanding are included in the computation of diluted earnings per share.
	Performance Shares
	Instead of restricted stock units, the Company makes annual grants of performance shares to members of its executive management. The performance criteria for these performance shares (organic sales volume growth, return on invested capital and sales from new products) were selected because the Company believes that they are important drivers of long-term stockholder value. The number of shares of 3M common stock that could actually be delivered at the end of the three-year performance period may be anywhere from 0% to 200% of each performance share granted, depending on the performance of the Company during such performance period. Non-substantive vesting requires that expense for the performance shares be recognized over one or three years depending on when each individual became a 3M executive. The first performance shares, which were granted in 2008, were distributed in 2011. Performance shares do not accrue dividends during the performance period. Therefore, the grant date fair value is determined by reducing the closing stock price on the date of grant by the net present value of dividends during the performance period. As a result of the significant uncertainty due to the economic crisis of 2008-2009, the Company granted restricted stock units instead of performance shares in 2009. Therefore, since there were no performance shares in 2009, there were also no related distributions in 2012. Performance share grants resumed in 2010 and continued thereafter.
	The following table summarizes performance share activity for the years ended December 31:
						2014					2013					2012
								Weighted Average					Weighted Average					Weighted Average
					Number of		Grant Date			Number of		Grant Date			Number of		Grant Date
					Awards		Fair Value			Awards		Fair Value			Awards		Fair Value
Undistributed balance —
	As of January 1				895,635		$	88.12		1,089,084		$	79.27		878,872		$	78.55
		Granted			305,225			124.89		353,734			96.87		467,531			81.55
		Distributed			-277,358			84.74		-507,083			75.16		―			―
		Performance change			212,461			109.74		-6,949			77.01		-178,838			81.27
		Forfeited			-36,212			109.44		-33,151			91.34		-78,481			80.21
	As of December 31				1,099,752		$	102.65		895,635		$	88.12		1,089,084		$	79.27
As of December 31, 2014, there was $22 million of compensation expense that has yet to be recognized related to performance shares. This expense is expected to be recognized over the remaining weighted-average earnings period of 11 months. During the years ended December 31, 2014 and 2013, the total fair value of performance shares that were distributed were $35 million and $52 million, respectively. The Company's actual tax benefits realized for the tax deductions related to the distribution of performance shares for the years ended December 31, 2014 and 2013 was $11 million and $16 million, respectively. There were no performance shares distributed or related tax benefits realized during the year ended December 31, 2012.
General Employees' Stock Purchase Plan (GESPP):
As of December 31, 2014, shareholders have approved 60 million shares for issuance under the Company's GESPP. Substantially all employees are eligible to participate in the plan. Participants are granted options at 85% of market value at the date of grant. There are no GESPP shares under option at the beginning or end of each year because options are granted on the first business day and exercised on the last business day of the same month.
General Employees' Stock Purchase Plan
					2014					2013					2012
							Weighted					Weighted					Weighted
							Average					Average					Average
					Shares		Exercise Price			Shares		Exercise Price			Shares		Exercise Price
Options granted					1,073,956		$	118.73		1,259,247		$	93.46		1,455,545		$	75.32
Options exercised					-1,073,956			118.73		-1,259,247			93.46		-1,455,545			75.32
Shares available for grant -
	31-Dec				29,112,004					30,185,960					31,445,207
The weighted-average fair value per option granted during 2014, 2013 and 2012 was $20.95, $16.49 and $13.29, respectively. The fair value of GESPP options was based on the 15% purchase price discount. The Company recognized compensation expense for GESSP options of $22 million in 2014, $21 million in 2013 and $19 million in 2012.

Business_Segments

Business Segments	12 Months Ended
	Dec. 31, 2014
Business Segments
Business Segments	NOTE 15. Business Segments
	3M's businesses are organized, managed and internally grouped into segments based on differences in markets, products, technologies and services. 3M manages its operations in five operating business segments: Industrial; Safety and Graphics; Electronics and Energy; Health Care; and Consumer. 3M's five business segments bring together common or related 3M technologies, enhancing the development of innovative products and services and providing for efficient sharing of business resources. These segments have worldwide responsibility for virtually all 3M product lines. 3M is not dependent on any single product/service or market. Transactions among reportable segments are recorded at cost. 3M is an integrated enterprise characterized by substantial intersegment cooperation, cost allocations and inventory transfers. Therefore, management does not represent that these segments, if operated independently, would report the operating income information shown. The difference between operating income and pre-tax income relates to interest income and interest expense, which are not allocated to business segments.
	Effective in the first quarter of 2014, 3M transferred a product line between divisions within different business segments and made other changes within business segments in its continuing effort to improve the alignment of its businesses around markets and customers.
	The product move between business segments was as follows:
	The movement of the Fire Protection product line from the Building and Commercial Services Division (Safety and Graphics business segment) to the Industrial Adhesives and Tapes Division (Industrial business segment). This product move resulted in an increase in net sales for total year 2013 of $73 million in the Industrial business segment offset by a corresponding decrease in the Safety and Graphics business segment.
	In addition, other changes within business segments were as follows:
	The combination of certain existing divisions/departments into new divisions. Within the Electronics and Energy business segment, the new divisions include the Electrical Markets Division (which includes the former Infrastructure Protection Division), and the Electronic Solutions Division (which includes the former 3M Touch Systems, Inc.). Within the Safety and Graphics business segment, the new Commercial Solutions Division was created from the combination of the former Architectural Markets Department, the former Building and Commercial Services Division and the former Commercial Graphics Division. None of these combinations crossed business segments.
	The renaming of the former Aerospace and Aircraft Maintenance Division within the Industrial business segment to the Aerospace and Commercial Transportation Division.
	The movement of certain product lines between various divisions within the same business segment.
	Effective in the second quarter of 2014, within the Electronics and Energy business segment, 3M combined three existing divisions into two new divisions. A large portion of both the Electronics Markets Materials Division and the Electronic Solutions Division were combined to form the Electronics Materials Solutions Division, which focuses on semiconductor and electronics materials and assembly solutions. The Optical Systems Division, the remaining portion of the Electronic Solutions Division and a portion of the Electronics Markets Materials Division were combined to form the Display Materials and Systems Division, which focuses on delivering light, color and user interface solutions.
	Effective in the fourth quarter of 2014, within the Industrial business segment, the Personal Care Division, which focuses on tapes and attachment systems for infant and adult hygiene, was combined with the Industrial Adhesives and Tapes Division.
	The financial information presented herein reflects the impact of the preceding product move between business segments for all periods presented.
	Business Segment Products
	Business Segment	Major Products
	Industrial	Tapes, coated, nonwoven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, filtration products, closure systems for personal hygiene products, acoustic systems products, automotive components, abrasion-resistant films, structural adhesives and paint finishing and detailing products
	Safety and Graphics	Personal protection products, traffic safety and security products, commercial graphics systems, commercial cleaning and protection products, floor matting, and roofing granules for asphalt shingles
	Electronics and Energy	Optical films solutions for electronic displays, packaging and interconnection devices, insulating and splicing solutions for the electronics, telecommunications and electrical industries, touch screens and touch monitors, renewable energy component solutions, and infrastructure protection products
	Health Care	Medical and surgical supplies, skin health and infection prevention products, drug delivery systems, dental and orthodontic products, health information systems and food safety products
	Consumer	Sponges, scouring pads, high-performance cloths, consumer and office tapes, repositionable notes, indexing systems, construction and home improvement products, home care products, protective material products, and consumer and office tapes and adhesives
	Business Segment Information
		Net Sales						Operating Income
	(Millions)	2014		2013		2012		2014		2013		2012
	Industrial	$	10,990	$	10,657	$	10,008	$	2,389	$	2,307	$	2,244
	Safety and Graphics		5,732		5,584		5,406		1,296		1,227		1,210
	Electronics and Energy		5,604		5,393		5,458		1,115		954		1,026
	Health Care		5,572		5,334		5,138		1,724		1,672		1,641
	Consumer		4,523		4,435		4,386		995		945		943
	Corporate and Unallocated		4		8		4		-251		-321		-472
	Elimination of Dual Credit		-604		-540		-496		-133		-118		-109
	Total Company	$	31,821	$	30,871	$	29,904	$	7,135	$	6,666	$	6,483
		Assets						Depreciation & Amortization						Capital Expenditures
	(Millions)	2014		2013		2012		2014		2013		2012		2014		2013		2012
	Industrial	$	8,508	$	8,833	$	8,614	$	383	$	373	$	324	$	395	$	511	$	416
	Safety and Graphics		4,939		5,122		5,085		234		255		237		221		207		189
	Electronics and Energy		5,116		5,336		5,512		271		260		266		232		261		350
	Health Care		4,344		4,329		4,296		181		171		169		169		120		113
	Consumer		2,434		2,516		2,445		108		106		110		111		128		105
	Corporate and Unallocated		5,928		7,414		7,924		231		206		182		365		438		311
	Total Company	$	31,269	$	33,550	$	33,876	$	1,408	$	1,371	$	1,288	$	1,493	$	1,665	$	1,484
	Corporate and unallocated operating income includes a variety of miscellaneous items, such as corporate investment gains and losses, certain derivative gains and losses, certain insurance-related gains and losses, certain litigation and environmental expenses, corporate restructuring charges and certain under- or over-absorbed costs (e.g. pension, stock-based compensation) that the Company may choose not to allocate directly to its business segments. Because this category includes a variety of miscellaneous items, it is subject to fluctuation on a quarterly and annual basis.
	3M business segment reporting measures include dual credit to business segments for certain U.S. sales and related operating income. Management evaluates each of its five operating business segments based on net sales and operating income performance, including dual credit U.S. reporting to further incentivize U.S. sales growth. As a result, 3M provides additional (“dual”) credit to those business segments selling products in the U.S. to an external customer when that segment is not the primary seller of the product. For example, certain respirators are primarily sold by the Personal Safety Division within the Safety and Graphics business segment; however, the Industrial business segment also sells this product to certain customers in its U.S. markets. In this example, the non-primary selling segment (Industrial) would also receive credit for the associated net sales it initiated and the related approximate operating income. The assigned operating income related to dual credit activity may differ from operating income that would result from actual costs associated with such sales. The offset to the dual credit business segment reporting is reflected as a reconciling item entitled “Elimination of Dual Credit,” such that sales and operating income for the U.S. in total are unchanged.

Geographic_Areas

Geographic Areas	12 Months Ended
	Dec. 31, 2014
Geographic Areas Disclosure
Geographic Areas	NOTE 16. Geographic Areas
	Geographic area information is used by the Company as a secondary performance measure to manage its businesses. Export sales and certain income and expense items are generally reported within the geographic area where the final sales to 3M customers are made.
														Property, Plant and Equipment - net
		Net Sales						Operating Income
	(Millions)	2014		2013		2012		2014		2013		2012		2014		2013
	United States	$	11,714	$	11,151	$	10,571	$	2,540	$	2,210	$	1,938	$	4,619	$	4,478
	Asia Pacific		9,418		9,047		9,092		2,487		2,386		2,450		1,798		1,943
	Europe, Middle East and Africa		7,198		7,085		6,730		1,234		1,168		1,163		1,502		1,636
	Latin America and Canada		3,504		3,611		3,529		867		908		936		570		595
	Other Unallocated		-13		-23		-18		7		-6		-4		―		―
	Total Company	$	31,821	$	30,871	$	29,904	$	7,135	$	6,666	$	6,483	$	8,489	$	8,652

Quarterly_Data_Unaudited

Quarterly Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Data (Unaudited)
Quarterly Data (Unaudited)	NOTE 17. Quarterly Data (Unaudited)
	(Millions, except per-share amounts)		First		Second		Third		Fourth		Year
	2014		Quarter		Quarter		Quarter		Quarter		2014
	Net sales		$	7,831	$	8,134	$	8,137	$	7,719	$	31,821
	Cost of sales			4,031		4,184		4,205		4,027		16,447
	Net income including noncontrolling interest			1,225		1,283		1,311		1,179		4,998
	Net income attributable to 3M			1,207		1,267		1,303		1,179		4,956
	Earnings per share attributable to 3M
		common shareholders - basic		1.83		1.94		2.02		1.85		7.63
	Earnings per share attributable to 3M
		common shareholders - diluted		1.79		1.91		1.98		1.81		7.49
	(Millions, except per-share amounts)		First		Second		Third		Fourth		Year
	2013		Quarter		Quarter		Quarter		Quarter		2013
	Net sales		$	7,634	$	7,752	$	7,916	$	7,569	$	30,871
	Cost of sales			3,969		4,013		4,148		3,976		16,106
	Net income including noncontrolling interest			1,147		1,213		1,245		1,116		4,721
	Net income attributable to 3M			1,129		1,197		1,230		1,103		4,659
	Earnings per share attributable to 3M
		common shareholders - basic		1.63		1.74		1.81		1.65		6.83
	Earnings per share attributable to 3M
		common shareholders - diluted		1.61		1.71		1.78		1.62		6.72
	Gross profit is calculated as net sales minus cost of sales.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Significant Accounting Policies
Consolidation	Consolidation: 3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products. All subsidiaries are consolidated. All significant intercompany transactions are eliminated. As used herein, the term “3M” or “Company” refers to 3M Company and subsidiaries unless the context indicates otherwise.
Foreign Currency Translation	Foreign currency translation: Local currencies generally are considered the functional currencies outside the United States. Assets and liabilities for operations in local-currency environments are translated at month-end exchange rates of the period reported. Income and expense items are translated at month-end exchange rates of each applicable month. Cumulative translation adjustments are recorded as a component of accumulated other comprehensive income (loss) in shareholders' equity.
	Although local currencies are typically considered as the functional currencies outside the United States, under Accounting Standards Codification (ASC) 830, Foreign Currency Matters, the reporting currency of a foreign entity's parent is assumed to be that entity's functional currency when the economic environment of a foreign entity is highly inflationary—generally when its cumulative inflation is approximately 100 percent or more for the three years that precede the beginning of a reporting period. 3M has a subsidiary in Venezuela with operating income representing less than 1.0 percent of 3M's consolidated operating income for 2014. 3M has determined that the cumulative inflation rate of Venezuela has exceeded, and continues to exceed, 100 percent since November 2009. Accordingly, since January 1, 2010, the financial statements of the Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent.
	The Venezuelan government sets official rates of exchange and conditions precedent to purchase foreign currency at these rates with local currency. Such rates and conditions are subject to change. For the periods presented through January 2013, this rate was set under the Transaction System for Foreign Currency Denominated Securities (SITME). In February 2013, the Venezuelan government announced a devaluation of its currency and the elimination of the SITME market. As a result, the official exchange rate controlled by the Commission for the Administration of Foreign Exchange (CADIVI) changed to a rate less favorable than the previous SITME rate.
	In January 2014, the Venezuelan government announced that a new agency, the National Center for Foreign Commerce (CENCOEX), had assumed the previous role of CADIVI with respect to the continuation of the existing official exchange rate; significantly expanded the use of a second foreign exchange mechanism called the Complementary System for Foreign Currency Acquirement (or SICAD1); and issued exchange regulations indicating the SICAD1 rate of exchange would be used for payments related to international investments. The SICAD1 exchange mechanism, a complementary currency auction system, had previously been created for purchases of foreign currency by only certain eligible importers and tourists. The government had begun publishing the SICAD1 rate resulting from currency auctions in December 2013. In late March 2014, the Venezuelan government launched a third foreign exchange mechanism, SICAD2, which relies on U.S. dollar cash and U.S. dollar denominated bonds offered by the Venezuelan Central Bank, PDVSA (the Venezuelan national oil and gas company) and certain private companies. SICAD2 was announced as being available to all industry sectors and that its use would not be restricted as to purpose.
	Since January 1, 2010, as discussed above, the financial statements of 3M's Venezuelan subsidiary have been remeasured as if its functional currency were that of its parent. For the periods presented, this remeasurement utilized the SITME rate through January 2013, the official CADIVI/CENCOEX rate beginning in February 2013, the SICAD1 rate beginning in March 2014, and the SICAD2 rate beginning in June 2014. 3M's use of SICAD1 and subsequently SICAD2 was based upon evaluation of a number of factors including, but not limited to, the exchange rate the Company's Venezuelan subsidiary may legally use to convert currency, settle transactions or pay dividends; the probability of accessing and obtaining currency by use of a particular rate or mechanism; and the Company's intent and ability to use a particular exchange mechanism. Other factors notwithstanding, the elimination of the SITME rate and use of the CADIVI/CENCOEX exchange rate beginning in February 2013, use of the SICAD1 rate beginning in March 2014, and use of the SICAD2 rate beginning in June 2014 did not have a material impact on 3M's consolidated results of operations or financial condition.
	The Company continues to monitor circumstances relative to its Venezuelan subsidiary. Changes in applicable exchange rates or exchange mechanisms may continue in the future. These changes could impact the rate of exchange applicable to remeasure the Company's net monetary assets (liabilities) denominated in Venezuelan Bolivars (VEF). As of December 31, 2014, the Company had a balance of net monetary liabilities denominated in VEF of less than 150 million VEF and the SICAD1 and SICAD2 exchange rates were approximately 10 VEF and 50 VEF per U.S. dollar, respectively. Had 3M utilized the SICAD1 rate rather than the SICAD2 rate of exchange for remeasurement of such items as of December 31, 2014, the differential would not have had a material impact on 3M's consolidated results of operations or financial condition.
	A need to deconsolidate the Company's Venezuelan subsidiary's operations may result from a lack of exchangeability of VEF-denominated cash coupled with an acute degradation in the ability to make key operational decisions due to government regulations in Venezuela. 3M monitors factors such as its ability to access various exchange mechanisms; the impact of government regulations on the Company's ability to manage its Venezuelan subsidiary's capital structure, purchasing, product pricing, and labor relations; and the current political and economic situation within Venezuela. Based upon such factors as of December 31, 2014, the Company continues to consolidate its Venezuelan subsidiary. As of December 31, 2014, the balance of intercompany receivables due from this subsidiary is less than $20 million and its equity balance is not significant.
Reclassifications	Reclassifications: Certain amounts in the prior years' consolidated financial statements have been reclassified to conform to the current year presentation.
Use of estimates	Use of estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.
Cash and cash equivalents	Cash and cash equivalents: Cash and cash equivalents consist of cash and temporary investments with maturities of three months or less when acquired.
Marketable securities	Marketable securities: The classification of marketable securities as current or non-current is dependent upon management's intended holding period, the security's maturity date and liquidity considerations based on market conditions. If management intends to hold the securities for longer than one year as of the balance sheet date, they are classified as non-current. 3M reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by ASC 320, Investments-Debt and Equity Securities, when determining the classification of the impairment as “temporary” or “other-than-temporary”. A temporary impairment charge results in an unrealized loss being recorded in the other comprehensive income component of shareholders' equity. Such an unrealized loss does not reduce net income for the applicable accounting period because the loss is not viewed as other-than-temporary. The factors evaluated to differentiate between temporary and other-than-temporary include the projected future cash flows, credit ratings actions, and assessment of the credit quality of the underlying collateral, as well as other factors.
Investments	Investments: Investments primarily include equity method, cost method, and available-for-sale equity investments. Available-for-sale investments are recorded at fair value. Unrealized gains and losses relating to investments classified as available-for-sale are recorded as a component of accumulated other comprehensive income (loss) in shareholders' equity.
Other assets	Other assets: Other assets include deferred income taxes, product and other insurance receivables, the cash surrender value of life insurance policies, and other long-term assets. Investments in life insurance are reported at the amount that could be realized under contract at the balance sheet date, with any changes in cash surrender value or contract value during the period accounted for as an adjustment of premiums paid. Cash outflows and inflows associated with life insurance activity are included in “Purchases of marketable securities and investments” and “Proceeds from maturities and sale of marketable securities and investments,” respectively.
Inventories	Inventories: Inventories are stated at the lower of cost or market, with cost generally determined on a first-in, first-out basis.
Property, plant and equipment	Property, plant and equipment: Property, plant and equipment, including capitalized interest and internal engineering costs, are recorded at cost. Depreciation of property, plant and equipment generally is computed using the straight-line method based on the estimated useful lives of the assets. The estimated useful lives of buildings and improvements primarily range from ten to forty years, with the majority in the range of twenty to forty years. The estimated useful lives of machinery and equipment primarily range from three to fifteen years, with the majority in the range of five to ten years. Fully depreciated assets are retained in property and accumulated depreciation accounts until disposal. Upon disposal, assets and related accumulated depreciation are removed from the accounts and the net amount, less proceeds from disposal, is charged or credited to operations. Property, plant and equipment amounts are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss would be recognized when the carrying amount of an asset exceeds the estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition. The amount of the impairment loss recorded is calculated by the excess of the asset's carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.
Conditional asset retirement obligations	Conditional asset retirement obligations: A liability is initially recorded at fair value for an asset retirement obligation associated with the retirement of tangible long-lived assets in the period in which it is incurred if a reasonable estimate of fair value can be made. Conditional asset retirement obligations exist for certain long-term assets of the Company. The obligation is initially measured at fair value using expected present value techniques. Over time the liabilities are accreted for the change in their present value and the initial capitalized costs are depreciated over the remaining useful lives of the related assets. The asset retirement obligation liability was $96 million and $90 million at December 31, 2014 and 2013, respectively.
Goodwill	Goodwill: Goodwill is the excess of cost of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and is tested for impairment between annual tests if an event occurs or circumstances change that would indicate the carrying amount may be impaired. Impairment testing for goodwill is done at a reporting unit level, with all goodwill assigned to a reporting unit. Reporting units are one level below the business segment level, but can be combined when reporting units within the same segment have similar economic characteristics. 3M did not combine any of its reporting units for impairment testing. An impairment loss generally would be recognized when the carrying amount of the reporting unit's net assets exceeds the estimated fair value of the reporting unit. The estimated fair value of a reporting unit is determined using earnings for the reporting unit multiplied by a price/earnings ratio for comparable industry groups, or by using a discounted cash flow analysis. Companies have the option to first assess qualitative factors to determine whether the fair value of a reporting unit is not “more likely than not” less than its carrying amount, which is commonly referred to as “Step 0”. 3M has chosen not to apply Step 0 for 2014 or prior.
Intangible assets	Intangible assets: Intangible asset types include customer related, patents, other technology-based, tradenames and other intangible assets acquired from an independent party. Intangible assets with a definite life are amortized over a period ranging from one to twenty years on a systematic and rational basis (generally straight line) that is representative of the asset's use. The estimated useful lives vary by category, with customer related largely between two to ten years, patents largely between five to ten years, other technology-based largely between five to twelve years, definite lived tradenames largely between two and twenty years, and other intangibles largely between two to ten years. Costs related to internally developed intangible assets, such as patents, are expensed as incurred, primarily in “Research, development and related expenses.”
	Intangible assets with a definite life are tested for impairment whenever events or circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss is recognized when the carrying amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair value of the asset. The amount of the impairment loss recorded is calculated by the excess of the asset's carrying value over its fair value. Fair value is generally determined using a discounted cash flow analysis.
	Intangible assets with an indefinite life, namely certain tradenames, are not amortized. Indefinite-lived intangible assets are tested for impairment annually, and are tested for impairment between annual tests if an event occurs or circumstances change that would indicate that the carrying amount may be impaired. An impairment loss generally would be recognized when the fair value is less than the carrying value of the indefinite-lived intangible asset.
Restructuring actions	Restructuring actions: Restructuring actions generally include significant actions involving employee-related severance charges, contract termination costs, and impairment of assets associated with such actions. Employee-related severance charges are largely based upon distributed employment policies and substantive severance plans. These charges are reflected in the quarter when the actions are probable and the amounts are estimable, which typically is when management approves the associated actions. Severance amounts for which affected employees were required to render service in order to receive benefits at their termination dates were measured at the date such benefits were communicated to the applicable employees and recognized as expense over the employees' remaining service periods. Contract termination and other charges primarily reflect costs to terminate a contract before the end of its term (measured at fair value at the time the Company provided notice to the counterparty) or costs that will continue to be incurred under the contract for its remaining term without economic benefit to the Company. Asset impairment charges related to intangible assets and property, plant and equipment reflect the excess of the assets' carrying values over their fair values.
Revenue (sales) recognition	Revenue (sales) recognition: The Company sells a wide range of products to a diversified base of customers around the world and has no material concentration of credit risk. Revenue is recognized when the risks and rewards of ownership have substantively transferred to customers. This condition normally is met when the product has been delivered or upon performance of services. The Company records estimated reductions to revenue or records expense for customer and distributor incentives, primarily comprised of rebates and free goods, at the time of the initial sale. These sales incentives are accounted for in accordance with ASC 605, Revenue Recognition. The estimated reductions of revenue for rebates are based on the sales terms, historical experience, trend analysis and projected market conditions in the various markets served. Since the Company serves numerous markets, the rebate programs offered vary across businesses, but the most common incentive relates to amounts paid or credited to customers for achieving defined volume levels or growth objectives. Free goods are accounted for as an expense and recorded in cost of sales. Sales, use, value-added and other excise taxes are not recognized in revenue.
	The vast majority of 3M's sales agreements are for standard products and services with customer acceptance occurring upon delivery of the product or performance of the service. However, to a limited extent 3M also enters into agreements that involve multiple elements (such as equipment, installation and service), software, or non-standard terms and conditions.
	For non-software multiple-element arrangements, in connection with 3M's adoption on a prospective basis of Accounting Standards Updated (ASU) No. 2009-13, Multiple-Deliverable Revenue Arrangements—a consensus of the FASB Emerging Issues Task Force, to new or materially modified arrangements beginning in 2011, the Company recognizes revenue for delivered elements when they have stand-alone value to the customer, they have been accepted by the customer, and for which there are only customary refund or return rights. Arrangement consideration is allocated to the deliverables by use of the relative selling price method. The selling price used for each deliverable is based on vendor-specific objective evidence (VSOE) if available, third-party evidence (TPE) if VSOE is not available, or estimated selling price if neither VSOE nor TPE is available. Estimated selling price is determined in a manner consistent with that used to establish the price to sell the deliverable on a standalone basis. For applicable pre-existing arrangements, 3M recognizes revenue for delivered elements when the fair values of the undelivered items are known and allocation of consideration to the delivered items is most often based on the residual method. In addition to the preceding conditions under ASU No. 2009-13 and for applicable pre-existing arrangements, equipment revenue is not recorded until the installation has been completed if equipment acceptance is dependent upon installation or if installation is essential to the functionality of the equipment. Installation revenues are not recorded until installation has been completed.
	For arrangements (or portions of arrangements) falling within software revenue recognition standards and that do not involve significant production, modification, or customization, revenue for each software or software-related element is recognized when the Company has VSOE of the fair value of all of the undelivered elements and applicable criteria have been met for the delivered elements. When the arrangements involve significant production, modification or customization, long-term construction-type accounting involving proportional performance is generally employed.
	For prepaid service contracts, sales revenue is recognized on a straight-line basis over the term of the contract, unless historical evidence indicates the costs are incurred on other than a straight-line basis. License fee revenue is recognized as earned, and no revenue is recognized until the inception of the license term.
	On occasion, agreements will contain milestones, or 3M will recognize revenue based on proportional performance. For these agreements, and depending on the specifics, 3M may recognize revenue upon completion of a substantive milestone, or in proportion to costs incurred to date compared with the estimate of total costs to be incurred.
Accounts receivable and allowances	Accounts receivable and allowances: Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company maintains allowances for bad debts, cash discounts, product returns and various other items. The allowance for doubtful accounts and product returns is based on the best estimate of the amount of probable credit losses in existing accounts receivable and anticipated sales returns. The Company determines the allowances based on historical write-off experience by industry and regional economic data and historical sales returns. The Company reviews the allowance for doubtful accounts monthly. The Company does not have any significant off-balance-sheet credit exposure related to its customers.
Advertising and merchandising	Advertising and merchandising: These costs are charged to operations in the period incurred, and totaled $407 million in 2014, $423 million in 2013 and $482 million in 2012.
Research, development, and related expenses	Research, development and related expenses: These costs are charged to operations in the period incurred and are shown on a separate line of the Consolidated Statement of Income. Research, development and related expenses totaled $1.770 billion in 2014, $1.715 billion in 2013 and $1.634 billion in 2012. Research and development expenses, covering basic scientific research and the application of scientific advances in the development of new and improved products and their uses, totaled $1.193 billion in 2014, $1.150 billion in 2013 and $1.079 billion in 2012. Related expenses primarily include technical support provided by 3M to customers who are using existing 3M products; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.
Internal-use software	Internal-use software: The Company capitalizes direct costs of services used in the development of internal-use software. Amounts capitalized are amortized over a period of three to seven years, generally on a straight-line basis, unless another systematic and rational basis is more representative of the software's use. Amounts are reported as a component of either machinery and equipment or capital leases within property, plant and equipment.
Environmental	Environmental: Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities related to anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies, the Company's commitment to a plan of action, or approval by regulatory agencies. Environmental expenditures for capital projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.
Income taxes	Income taxes: The provision for income taxes is determined using the asset and liability approach. Under this approach, deferred income taxes represent the expected future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities. The Company records a valuation allowance to reduce its deferred tax assets when uncertainty regarding their realizability exists. As of December 31, 2014 and 2013, the Company had valuation allowances of $22 million and $23 million on its deferred tax assets, respectively. The Company recognizes and measures its uncertain tax positions based on the rules under ASC 740, Income Taxes.
Earnings Per Share	Earnings per share: The difference in the weighted average 3M shares outstanding for calculating basic and diluted earnings per share attributable to 3M common shareholders is the result of the dilution associated with the Company's stock-based compensation plans. Certain options outstanding under these stock-based compensation plans during the years 2014, 2013 and 2012 were not included in the computation of diluted earnings per share attributable to 3M common shareholders because they would not have had a dilutive effect (1.4 million average options for 2014, 2.0 million average options for 2013, and 12.6 million average options for 2012). The computations for basic and diluted earnings per share for the years ended December 31 follow:
	Earnings Per Share Computations
	(Amounts in millions, except per share amounts)			2014		2013		2012
	Numerator:
		Net income attributable to 3M		$	4,956	$	4,659	$	4,444
	Denominator:
		Denominator for weighted average 3M common shares
			outstanding – basic		649.2		681.9		693.9
		Dilution associated with the Company’s stock-based
			compensation plans		12.8		11.7		9.4
		Denominator for weighted average 3M common shares
			outstanding – diluted		662		693.6		703.3
	Earnings per share attributable to 3M common shareholders – basic			$	7.63	$	6.83	$	6.4
	Earnings per share attributable to 3M common shareholders – diluted			$	7.49	$	6.72	$	6.32
Stock-based compensation	Stock-based compensation: The Company recognizes compensation expense for its stock-based compensation programs, which include stock options, restricted stock, restricted stock units, performance shares, and the General Employees' Stock Purchase Plan (GESPP). Under applicable accounting standards, the fair value of share-based compensation is determined at the grant date and the recognition of the related expense is recorded over the period in which the share-based compensation vests. Refer to Note 14 for additional information.
Comprehensive income	Comprehensive income: Total comprehensive income and the components of accumulated other comprehensive income (loss) are presented in the Consolidated Statement of Comprehensive Income and the Consolidated Statement of Changes in Equity. Accumulated other comprehensive income (loss) is composed of foreign currency translation effects (including hedges of net investments in international companies), defined benefit pension and postretirement plan adjustments, unrealized gains and losses on available-for-sale debt and equity securities, and unrealized gains and losses on cash flow hedging instruments.
Derivatives and hedging activities	Derivatives and hedging activities: All derivative instruments within the scope of ASC 815, Derivatives and Hedging, are recorded on the balance sheet at fair value. The Company uses interest rate swaps, currency and commodity price swaps, and foreign currency forward and option contracts to manage risks generally associated with foreign exchange rate, interest rate and commodity market volatility. All hedging instruments that qualify for hedge accounting are designated and effective as hedges, in accordance with U.S. generally accepted accounting principles. If the underlying hedged transaction ceases to exist, all changes in fair value of the related derivatives that have not been settled are recognized in current earnings. Instruments that do not qualify for hedge accounting are marked to market with changes recognized in current earnings. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the items subject to designated hedge or undesignated (economic) hedge relationships. The Company does not hold or issue derivative financial instruments for trading purposes and is not a party to leveraged derivatives.
Credit risk	Credit risk: The Company is exposed to credit loss in the event of nonperformance by counterparties in interest rate swaps, currency swaps, commodity price swaps, and forward and option contracts. However, the Company's risk is limited to the fair value of the instruments. The Company actively monitors its exposure to credit risk through the use of credit approvals and credit limits, and by selecting major international banks and financial institutions as counterparties. 3M enters into master netting arrangements with counterparties when possible to mitigate credit risk in derivative transactions. A master netting arrangement may allow each counterparty to net settle amounts owed between a 3M entity and the counterparty as a result of multiple, separate derivative transactions. The Company does not anticipate nonperformance by any of these counterparties. 3M has elected to present the fair value of derivative assets and liabilities within the Company's consolidated balance sheet on a gross basis even when derivative transactions are subject to master netting arrangements and may otherwise qualify for net presentation.
Fair value measurements	Fair value measurements: 3M follows ASC 820, Fair Value Measurements and Disclosures, with respect to assets and liabilities that are measured at fair value on a recurring basis and nonrecurring basis. Under the standard, fair value is defined as the exit price, or the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date. The standard also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs market participants would use in valuing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the factors market participants would use in valuing the asset or liability developed based upon the best information available in the circumstances. The hierarchy is broken down into three levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement.
Acquisitions	Acquisitions: The Company accounts for business acquisitions in accordance with ASC 805, Business Combinations. This standard requires the acquiring entity in a business combination to recognize all (and only) the assets acquired and liabilities assumed in the transaction and establishes the acquisition-date fair value as the measurement objective for all assets acquired and liabilities assumed in a business combination. Certain provisions of this standard prescribe, among other things, the determination of acquisition-date fair value of consideration paid in a business combination (including contingent consideration) and the exclusion of transaction and acquisition-related restructuring costs from acquisition accounting.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Significant Accounting Policies
Earnings per share	Earnings Per Share Computations
	(Amounts in millions, except per share amounts)			2014		2013		2012
	Numerator:
		Net income attributable to 3M		$	4,956	$	4,659	$	4,444
	Denominator:
		Denominator for weighted average 3M common shares
			outstanding – basic		649.2		681.9		693.9
		Dilution associated with the Company’s stock-based
			compensation plans		12.8		11.7		9.4
		Denominator for weighted average 3M common shares
			outstanding – diluted		662		693.6		703.3
	Earnings per share attributable to 3M common shareholders – basic			$	7.63	$	6.83	$	6.4
	Earnings per share attributable to 3M common shareholders – diluted			$	7.49	$	6.72	$	6.32

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2014
Acquisitions
Allocation of purchase price		2012 Acquisition Activity
	(Millions)			Other		Total
	Asset (Liability)	Ceradyne, Inc.		Acquisitions
	Accounts receivable	$	55	$	29	$	84
	Inventory		112		13		125
	Other current assets		36		1		37
	Marketable securities		250		―		250
	Property, plant, and equipment		238		3		241
	Purchased finite-lived intangible assets		127		86		213
	Purchased indefinite-lived intangible assets		―		2		2
	Purchased goodwill		198		141		339
	Accounts payable and other liabilities, net of other assets		-100		-27		-127
	Interest bearing debt		-93		-3		-96
	Deferred tax asset/(liability)		-25		3		-22
	Net assets acquired	$	798	$	248	$	1,046
	Supplemental information:
	Cash paid	$	850	$	248	$	1,098
	Less: Cash acquired		52		―		52
	Cash paid, net of cash acquired	$	798	$	248	$	1,046

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets
Goodwill				Dec. 31,			2013			2013			Dec. 31,			2014			2014		Dec. 31,
				2012			acquisition			translation			2013			acquisition			translation		2014
	(Millions)			Balance			activity			and other			Balance			activity			and other		Balance
	Industrial			$	2,174		$	10		$	-18		$	2,166		$	―		$	-129	$	2,037
	Safety and Graphics				1,751			―			-11			1,740			―			-90		1,650
	Electronics and Energy				1,622			―			-10			1,612			―			-53		1,559
	Health Care				1,598			―			-2			1,596			65			-72		1,589
	Consumer				240			―			-9			231			―			-16		215
	Total Company			$	7,385		$	10		$	-50		$	7,345		$	65		$	-360	$	7,050
Acquired Intangible Assets
	(Millions)			2014			2013
	Customer related intangible assets			$	1,348		$	1,411
	Patents				581			602
	Other technology-based intangible assets				407			406
	Definite-lived tradenames				401			411
	Other amortizable intangible assets				221			217
	Total gross carrying amount			$	2,958		$	3,047
	Accumulated amortization — customer related				-597			-514
	Accumulated amortization — patents				-472			-458
	Accumulated amortization — other technology based				-215			-179
	Accumulated amortization — definite-lived tradenames				-195			-178
	Accumulated amortization — other				-167			-159
	Total accumulated amortization			$	-1,646		$	-1,488
		Total finite-lived intangible assets — net		$	1,312		$	1,559
	Non-amortizable intangible assets (primarily tradenames)				123			129
		Total intangible assets — net		$	1,435		$	1,688
Schedule of amortization expense for acquired intangible assets	Amortization expense for the years ended December 31 follows:
	(Millions)			2014			2013			2012
	Amortization expense		$	228		$	236		$	233
Schedule of expected amortization expense for acquired amortizable intangible assets	Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2014 follows:
												After
	(Millions)	2015		2016		2017		2018		2019		2019
	Amortization expense		$	204		$	176		$	154		$	139		$	128		$	511

Supplemental_Balance_Sheet_Inf1

Supplemental Balance Sheet Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Balance Sheet Information
Supplemental Balance Sheet Information	(Millions)		2014		2013
	Other current assets
	Prepaid expenses and other		$	595	$	602
	Deferred income taxes			444		502
	Derivative assets-current			182		76
	Insurance related receivables, prepaid expenses and other			77		99
		Total other current assets	$	1,298	$	1,279
	Investments
	Equity method		$	58	$	69
	Cost method			41		45
	Other investments			3		8
		Total investments	$	102	$	122
	Property, plant and equipment - at cost
	Land		$	368	$	411
	Buildings and leasehold improvements			6,943		7,062
	Machinery and equipment			14,684		14,665
	Construction in progress			679		772
	Capital leases			167		158
	Gross property, plant and equipment			22,841		23,068
	Accumulated depreciation			-14,352		-14,416
		Property, plant and equipment - net	$	8,489	$	8,652
	Other assets
	Deferred income taxes		$	889	$	360
	Insurance related receivables and other			89		96
	Cash surrender value of life insurance policies			245		236
	Other			331		288
		Total other assets	$	1,554	$	980
	Other current liabilities
	Accrued trade payables		$	533	$	547
	Deferred income			541		521
	Derivative liabilities			39		103
	Dividends payable			648		567
	Employee benefits and withholdings			172		195
	Contingent liability claims and other			157		119
	Property and other taxes			90		88
	Pension and postretirement benefits			60		61
	Deferred income taxes			34		37
	Other			644		653
		Total other current liabilities	$	2,918	$	2,891
	Other liabilities
	Long term income taxes payable		$	519	$	472
	Employee benefits			262		315
	Contingent liability claims and other			300		314
	Capital lease obligations			59		58
	Deferred income			21		19
	Deferred income taxes			141		538
	Other			253		268
		Total other liabilities	$	1,555	$	1,984

Supplemental_Equity_and_Compre1

Supplemental Equity and Comprehensive Income Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Equity and Comprehensive Income Information
Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M	Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component
	(Millions)				Cumulative Translation Adjustment			Defined Benefit Pension and Postretirement Plans Adjustment			Debt and Equity Securities, Unrealized Gain (Loss)		Cash Flow Hedging Instruments, Unrealized Gain (Loss)		Total Accumulated Other Comprehen-sive Income (Loss)
	Balance at December 31, 2011, net of tax				$	114		$	-5,155		$	-6	$	22	$	-5,025
	Other comprehensive income (loss),
		before tax:
		Amounts before reclassifications				133			-204			6		3		-62
		Amounts reclassified out				―			615			―		-72		543
	Total other comprehensive income (loss),
		before tax				133			411			6		-69		481
	Tax effect					-17			-211			-2		24		-206
	Total other comprehensive income (loss),
		net of tax				116			200			4		-45		275
	Balance at December 31, 2012, net of tax				$	230		$	-4,955		$	-2	$	-23	$	-4,750
	Other comprehensive income (loss),
		before tax:
		Amounts before reclassifications				-462			1,361			―		-98		801
		Amounts reclassified out				―			569			―		122		691
	Total other comprehensive income (loss),
		before tax				-462			1,930			―		24		1,492
	Tax effect					44			-690			―		-9		-655
	Total other comprehensive income (loss),
		net of tax				-418			1,240			―		15		837
	Balance at December 31, 2013, net of tax				$	-188		$	-3,715		$	-2	$	-8	$	-3,913
	Other comprehensive income (loss),
		before tax:
		Amounts before reclassifications				-856			-2,638			2		171		-3,321
		Amounts reclassified out				―			360			1		-4		357
	Total other comprehensive income (loss),
		before tax				-856			-2,278			3		167		-2,964
	Tax effect					-92			716			-1		-60		563
	Total other comprehensive income (loss),
		net of tax				-948			-1,562			2		107		-2,401
	Impact from purchase of subsidiary shares					41			-16			―		―		25
	Balance at December 31, 2014, net of tax				$	-1,095		$	-5,293		$	―	$	99	$	-6,289
Reclassifications Out of Accumulated Other Comprehensive Income	Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
				Amount Reclassified from
	(Millions)			Accumulated Other Comprehensive Income								Location on Income Statement
	Details about Accumulated Other Comprehensive Income Components		Year ended December 31, 2014			Year ended December 31, 2013			Year ended December 31, 2012
	Gains (losses) associated with, defined benefit pension and postretirement plans amortization
		Transition asset	$	1		$	1		$	1		See Note 10
		Prior service benefit		59			77			84		See Note 10
		Net actuarial loss		-420			-647			-700		See Note 10
	Total before tax			-360			-569			-615
	Tax effect			122			197			219		Provision for income taxes
	Net of tax		$	-238		$	-372		$	-396
	Debt and equity security gains (losses)
		Sales or impairments of securities	$	-1		$	―		$	―		Selling, general and administrative expenses
	Total before tax			-1			―			―
	Tax effect			―			―			―		Provision for income taxes
	Net of tax		$	-1		$	―		$	―
	Cash flow hedging instruments gains (losses)
		Foreign currency forward/option contracts	$	3		$	-11		$	41		Cost of sales
		Foreign currency forward contracts		―			-108			42		Interest expense
		Commodity price swap contracts		2			-2			-10		Cost of sales
		Interest rate swap contracts		-1			-1			-1		Interest expense
	Total before tax			4			-122			72
	Tax effect			-1			45			-26		Provision for income taxes
	Net of tax		$	3		$	-77		$	46
	Total reclassifications for the period, net of tax		$	-236		$	-449		$	-350
Effect of purchase of subsidiary shares on equity attributable to 3M Company shareholders	(Millions)		Year ended December 31, 2014
	Net income attributable to 3M		$	4,956
	Impact of purchase of subsidiary shares			-409
	Change in 3M Company shareholders’ equity from net income attributable to 3M and
		impact of purchase of subsidiary shares	$	4,547

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Elements
Supplemental Cash Flow Information
	(Millions)	2014		2013		2012
	Cash income tax payments, net of refunds	$	1,968	$	1,803	$	1,717
	Cash interest payments		178		169		166
	Capitalized interest		15		21		23

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Taxes
Income Before Income Taxes	Income Before Income Taxes
	(Millions)			2014			2013			2012
	United States			$	3,815		$	3,194		$	2,902
	International				3,211			3,368			3,449
		Total		$	7,026		$	6,562		$	6,351
Provision for Income Taxes	Provision for Income Taxes
	(Millions)				2014			2013			2012
	Currently payable
		Federal			$	1,103		$	948		$	743
		State				108			91			75
		International				1,008			901			918
	Deferred
		Federal				-171			-123			-3
		State				-9			-2			10
		International				-11			26			97
			Total		$	2,028		$	1,841		$	1,840
Components of Deferred Tax Assets and Liabilities	Components of Deferred Tax Assets and Liabilities
	(Millions)				2014			2013
	Deferred tax assets:
		Accruals not currently deductible
			Employee benefit costs		$	148		$	140
			Product and other claims			152			155
			Miscellaneous accruals			137			130
		Pension costs				1,312			447
		Stock-based compensation				290			322
		Net operating/capital loss carryforwards				175			225
		Foreign tax credits				360			316
		Inventory				221			221
	Gross deferred tax assets					2,795			1,956
	Valuation allowance					-22			-23
	Total deferred tax assets				$	2,773		$	1,933
	Deferred tax liabilities:
		Product and other insurance receivables			$	-31		$	-46
		Accelerated depreciation				-804			-813
		Intangible amortization				-719			-780
		Other				-61			-7
	Total deferred tax liabilities				$	-1,615		$	-1,646
	Net deferred tax assets				$	1,158		$	287
Reconciliation of Effective Income Tax Rate	Reconciliation of Effective Income Tax Rate
				2014			2013			2012
	Statutory U.S. tax rate			35	%		35	%		35	%
	State income taxes - net of federal benefit			0.9			0.9			0.9
	International income taxes - net			-5.8			-6.3			-4.2
	U.S. research and development credit			-0.4			-0.7			-
	Reserves for tax contingencies			0.6			1.2			-1.9
	Domestic Manufacturer's deduction			-1.3			-1.6			-1.2
	All other - net			-0.1			-0.4			0.4
		Effective worldwide tax rate		28.9	%		28.1	%		29	%
Reconciliation of Federal, State and Foreign Tax Gross Unrecognized Tax Benefits	Federal, State and Foreign Tax
	(Millions)				2014			2013			2012
	Gross UTB Balance at January 1				$	659		$	528		$	594
	Additions based on tax positions related to the current year					201			97			80
	Additions for tax positions of prior years					30			158			114
	Reductions for tax positions of prior years					-74			-29			-120
	Settlements					-154			-17			-50
	Reductions due to lapse of applicable statute of limitations					-79			-78			-90
	Gross UTB Balance at December 31				$	583		$	659		$	528
	Net UTB impacting the effective tax rate at December 31				$	265		$	262		$	185

Marketable_Securities_Tables

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Marketable Securities
Schedule of Marketable Securities				December 31,		December 31,
	(Millions)			2014		2013
	U.S. government agency securities			$	67	$	103
	Foreign government agency securities				75		30
	Corporate debt securities				241		143
	Commercial paper				―		60
	Certificates of deposit/time deposits				41		20
	U.S. municipal securities				―		2
	Asset-backed securities:
		Automobile loan related			122		287
		Credit card related			59		52
		Equipment lease related			21		30
		Other			―		29
	Asset-backed securities total				202		398
	Current marketable securities			$	626	$	756
	U.S. government agency securities			$	41	$	131
	Foreign government agency securities				20		95
	Corporate debt securities				378		638
	Certificates of deposit/time deposits				―		20
	U.S. treasury securities				38		49
	U.S. municipal securities				15		―
	Auction rate securities				―		11
	Asset-backed securities:
		Automobile loan related			160		298
		Credit card related			103		128
		Equipment lease related			27		37
		Other			46		46
	Asset-backed securities total				336		509
	Non-current marketable securities			$	828	$	1,453
	Total marketable securities			$	1,454	$	2,209
Marketable securities by contractual maturity	(Millions)		31-Dec-14
	Due in one year or less		$	367
	Due after one year through five years			1,064
	Due after five years through ten years			8
	Due after ten years			15
	Total marketable securities		$	1,454

LongTerm_Debt_and_ShortTerm_Bo1

Long-Term Debt and Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2014
Long-Term Debt and Short-Term Borrowings
Schedule of Long-Term Debt	Long-Term Debt
					Currency/		Effective			Final
	(Millions)				Fixed vs.		Interest			Maturity		Carrying Value
	Description / 2014 Principal Amount		Reference		Floating		Rate			Date		2014			2013
	Eurobond (775 million Euros)		A1		Euro Fixed		―	%		―		$	―		$	1,075
	Eurobond (250 million Euros)		A2		Euro Floating		―	%		―			―			349
	Medium-term note ($1 billion)		B		USD Fixed		1.62	%		2016			997			995
	Medium-term note (750 million Euros)		C		Euro Fixed		1.71	%		2026			897			―
	Eurobond (300 million Euros)		D1		Euro Fixed		1.97	%		2021			363			411
	Eurobond (300 million Euros)		D2		Euro Floating		0.4	%		2021			390			404
	30-year bond ($750 million)		E		USD Fixed		5.73	%		2037			748			748
	Medium-term note ($650 million)		F		USD Fixed		1.1	%		2017			649			648
	Medium-term note ($600 million)		G1		USD Floating		0.28	%		2019			594			―
	Medium-term note ($25 million)		G2		USD Fixed		1.74	%		2019			25			―
	Medium-term note (500 million Euros)		H		Euro Floating		0.31	%		2018			608			―
	Medium-term note ($600 million)		I		USD Fixed		2.17	%		2022			593			592
	30-year debenture ($330 million)		J		USD Fixed		6.01	%		2028			344			346
	Medium-term note ($325 million)		K		USD Fixed		4.05	%		2044			315			―
	UK borrowing (66 million GBP)		L		GBP Floating		―	%		―			―			109
	Floating rate note ($96 million)		M		USD Floating		―	%		2041			96			97
	Floating rate note ($55 million)		N		USD Floating		―	%		2044			55			59
	Other borrowings		O		Various		4.17	%		2015-2040			112			79
	Total long-term debt											$	6,786		$	5,912
	Less: current portion of long-term debt												55			1,586
	Long-term debt (excluding current portion)											$	6,731		$	4,326
Schedule of Post-Swap Borrowing (Long-Term Debt, Including Current Portion)			2014						2013
	(Millions)		Carrying Value			Effective Interest Rate			Carrying Value			Effective Interest Rate
	Fixed-rate debt		$	4,933		2.74	%		$	4,821		3.19	%
	Floating-rate debt			1,853		0.53	%			1,091		0.48	%
	Total long-term debt, including current portion		$	6,786					$	5,912
Schedule of Short-Term Borrowings and Current Portion of Long-Term Debt	Short-Term Borrowings and Current Portion of Long-Term Debt
			Effective			Carrying Value
	(Millions)		Interest Rate			2014			2013
	Current portion of long-term debt		―	%		$	55		$	1,586
	U.S. dollar commercial paper		―	%			―			―
	Other borrowings		2.46	%			51			97
	Total short-term borrowings and current portion of long-term debt					$	106		$	1,683
Schedule of Maturities of Long-Term Debt																After
	2015			2016			2017			2018			2019			2019		Total
	$	55		$	1,109		$	745		$	608		$	622		$	3,647	$	6,786

Pension_and_Postretirement_Ben1

Pension and Postretirement Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Pension and Postretirement Benefit Plans
Reconciliation of the beginning and ending balances of the benefit obligation and the fair value of plan assets					Qualified and Non-qualified
					Pension Benefits												Postretirement
					United States						International						Benefits
	(Millions)				2014			2013		`	2014			2013			2014			2013
	Change in benefit obligation
		Benefit obligation at beginning of year			$	13,967		$	14,830		$	6,346		$	6,414		$	2,017		$	2,205
		Acquisitions/Transfers in				―			15			―			―			―			―
		Service cost				241			258			141			147			65			80
		Interest cost				676			598			252			238			97			88
		Participant contributions				―			―			10			8			18			30
		Foreign exchange rate changes				―			―			-663			-79			-11			-13
		Plan amendments				-266			―			3			3			―			-20
		Actuarial (gain) loss				2,874			-986			1,128			-163			415			-225
		Medicare Part D Reimbursement				―			―			―			―			1			2
		Benefit payments				-1,039			-747			-235			-222			-140			-130
		Settlements, curtailments, special
			termination benefits and other			-1			-1			-3			―			―			―
		Benefit obligation at end of year			$	16,452		$	13,967		$	6,979		$	6,346		$	2,462		$	2,017
	Change in plan assets
		Fair value of plan assets at
			beginning of year		$	13,889		$	13,781		$	5,758		$	5,222		$	1,405		$	1,321
		Actual return on plan assets				1,749			803			813			421			148			178
		Company contributions				45			53			165			423			5			6
		Participant contributions				―			―			10			8			18			30
		Foreign exchange rate changes				―			―			-554			-94			―			―
		Benefit payments				-1,039			-747			-235			-222			-140			-130
		Settlements, curtailments, special
			termination benefits and other			-1			-1			―			―			―			―
		Fair value of plan assets at end of year			$	14,643		$	13,889		$	5,957		$	5,758		$	1,436		$	1,405
	Funded status at end of year				$	-1,809		$	-78		$	-1,022		$	-588		$	-1,026		$	-612
Amounts recognized in the Consolidated Balance Sheet					Qualified and Non-qualified
					Pension Benefits												Postretirement
					United States						International						Benefits
	(Millions)				2014			2013			2014			2013			2014			2013
	Amounts recognized in the
		Consolidated Balance Sheet as of
		Dec. 31,
		Non-current assets			$	3		$	399		$	43		$	178		$	―		$	―
		Accrued benefit cost
			Current liabilities			-46			-47			-10			-10			-4			-4
			Non-current liabilities			-1,766			-430			-1,055			-756			-1,022			-608
		Ending balance			$	-1,809		$	-78		$	-1,022		$	-588		$	-1,026		$	-612
Amounts recognized in accumulated other comprehensive income	Amounts recognized in accumulated
		other comprehensive income as of
		Dec. 31,
		Net transition obligation (asset)			$	―		$	―		$	-3		$	-4		$	―		$	―
		Net actuarial loss (gain)				5,462			3,537			2,200			1,949			914			616
		Prior service cost (credit)				-251			20			-93			-117			-102			-151
		Ending balance			$	5,211		$	3,557		$	2,104		$	1,828		$	812		$	465
Amounts relating to pension plans with accumulated benefit obligations in excess of plan assets				Qualified and Non-qualified Pension Plans
				United States						International
	(Millions)			2014			2013			2014			2013
	Projected benefit obligation			$	16,435		$	486		$	2,588		$	2,198
	Accumulated benefit obligation				15,319			463			2,335			1,960
	Fair value of plan assets				14,623			9			1,636			1,547
Components of net periodic benefit cost (benefit)	Components of net periodic cost and other amounts recognized in other comprehensive income
	Net periodic benefit cost is recorded in cost of sales, selling, general and administrative expenses, and research, development and related expenses. Components of net periodic benefit cost and other changes in plan assets and benefit obligations recognized in other comprehensive income for the years ended December 31 follow:
					Qualified and Non-qualified
					Pension Benefits																	Postretirement
					United States									International								Benefits
	(Millions)				2014			2013			2012			2014			2013			2012		2014		2013		2012
	Net periodic benefit cost (benefit)
		Service cost			$	241		$	258		$	254		$	141		$	147		$	124	$	65	$	80	$	78
		Interest cost				676			598			587			252			238			247		97		88		86
		Expected return on plan assets				-1,043			-1,046			-992			-312			-291			-295		-90		-90		-84
		Amortization of transition
			(asset) obligation			―			―			―			-1			-1			-1		―		―		―
		Amortization of prior service
			cost (benefit)			4			5			5			-16			-16			-17		-47		-66		-72
		Amortization of net actuarial (gain)
			loss			243			399			470			121			153			122		56		95		108
	Net periodic benefit cost (benefit)				$	121		$	214		$	324		$	185		$	230		$	180	$	81	$	107	$	116
	Settlements, curtailments, special
		termination benefits and other				―			―			26			4			2			4		―		―		―
	Net periodic benefit cost (benefit)
		after settlements, curtailments,
		special termination benefits
		and other			$	121		$	214		$	350		$	189		$	232		$	184	$	81	$	107	$	116
	Other changes in plan assets and
		benefit obligations recognized in
		other comprehensive (income)
		loss
		Amortization of transition (asset)
			obligation			―			―			―			1			1			1		―		―		―
		Prior service cost (benefit)				-266			―			―			3			3			-7		―		-20		―
		Amortization of prior service cost
			(benefit)			-4			-5			-5			16			16			17		47		66		72
		Net actuarial (gain) loss				2,167			-743			-470			592			-294			707		358		-313		-33
		Amortization of net actuarial (gain)
			loss			-243			-399			-470			-121			-153			-122		-56		-95		-108
		Foreign currency				―			―			―			-215			-47			24		-1		-2		-1
	Total recognized in other
		comprehensive (income) loss			$	1,654		$	-1,147		$	-945		$	276		$	-474		$	620	$	348	$	-364	$	-70
	Total recognized in net periodic
		benefit cost (benefit) and other
		comprehensive (income) loss			$	1,775		$	-933		$	-595		$	465		$	-242		$	804	$	429	$	-257	$	46
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year	Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over the next fiscal year
				Qualified and Non-qualified Pension Benefits
														Postretirement
	(Millions)			United States			International			Benefits
	Amortization of transition (asset) obligation			$	―		$	-1		$	―
	Amortization of prior service cost (benefit)				-24			-15			-33
	Amortization of net actuarial (gain) loss				408			154			77
	Total amortization expected over the next fiscal year			$	384		$	138		$	44
Weighted-average assumptions used to determine benefit obligations and net cost	Weighted-average assumptions used to determine benefit obligations
					Qualified and Non-qualified Pension Benefits																	Postretirement
					United States									International								Benefits
					2014			2013			2012			2014			2013			2012		2014		2013		2012
	Discount rate				4.1	%		4.98	%		4.14	%		3.11	%		4.02	%		3.78	%	4.07	%	4.83	%	4	%
	Compensation rate
		increase			4.1	%		4	%		4	%		3.33	%		3.35	%		3.31	%	N/A		N/A		N/A
	Weighted-average assumptions used to determine net cost for years ended
					Qualified and Non-qualified Pension Benefits																	Postretirement
					United States									International								Benefits
					2014			2013			2012			2014			2013			2012		2014		2013		2012
	Discount rate				4.98	%		4.14	%		4.15	%		4.02	%		3.78	%		4.58	%	4.83	%	4	%	4.04	%
	Expected return
		on assets			7.75	%		8	%		8.25	%		5.83	%		5.87	%		6.38	%	7.11	%	7.19	%	7.3	%
	Compensation rate
		increase			4	%		4	%		4	%		3.35	%		3.31	%		3.52	%	N/A		N/A		N/A
Estimated future pension and postretirement benefit payments	Future Pension and Postretirement Benefit Payments
	The following table provides the estimated pension and postretirement benefit payments that are payable from the plans to participants.
				Qualified and Non-qualified
				Pension Benefits						Postretirement
	(Millions)			United States			International			Benefits
	2015 Benefit Payments			$	946		$	209		$	127
	2016 Benefit Payments				964			226			139
	2017 Benefit Payments				983			237			156
	2018 Benefit Payments				1,010			256			160
	2019 Benefit Payments				1,037			273			162
	Next five years				5,381			1,563			860
United States Qualified and Non-qualified Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Fair values of the assets held by the plans by asset category	The fair values of the assets held by the U.S. pension plans by asset class are as follows:
					Fair Value Measurements Using Inputs Considered as																	Fair Value at
	(Millions)				Level 1						Level 2						Level 3					Dec. 31,
	Asset Class				2014			2013			2014			2013			2014			2013		2014		2013
	Equities
		U.S. equities			$	1,766		$	1,595		$	3		$	3		$	―		$	3	$	1,769	$	1,601
		Non-U.S. equities				1,214			1,324			1			1			―			―		1,215		1,325
		Index funds				―			―			148			151			2			1		150		152
		Long/short equity				―			―			71			67			382			393		453		460
	Total Equities				$	2,980		$	2,919		$	223		$	222		$	384		$	397	$	3,587	$	3,538
	Fixed Income
		U.S. government securities			$	1,032		$	908		$	590		$	601		$	―		$	―	$	1,622	$	1,509
		Non-U.S. government
			securities			7			20			381			316			―			―		388		336
		Preferred and convertible
			securities			3			―			―			4			―			―		3		4
		U.S. corporate bonds				8			14			2,550			2,046			―			―		2,558		2,060
		Non-U.S. corporate bonds				―			―			478			412			―			―		478		412
		Asset-backed securities				―			―			20			26			―			―		20		26
		Collateralized mortgage
			obligations			―			―			29			28			―			―		29		28
		Private placements				3			―			388			251			―			2		391		253
		Derivative instruments				6			-1			126			6			―			―		132		5
		Other				―			―			31			37			―			―		31		37
	Total Fixed Income				$	1,059		$	941		$	4,593		$	3,727		$	―		$	2	$	5,652	$	4,670
	Private Equity
		Buyouts			$	―		$	―		$	―		$	―		$	700		$	737	$	700	$	737
		Derivative instruments				―			―			―			―			-74			-97		-74		-97
		Direct investments				―			―			―			―			516			467		516		467
		Distressed debt				―			―			―			―			202			211		202		211
		Growth equity				15			21			―			―			183			170		198		191
		Mezzanine				―			―			―			―			116			83		116		83
		Real estate				―			―			―			―			147			156		147		156
		Secondary				―			―			―			―			145			152		145		152
		Venture capital				―			―			―			―			552			548		552		548
	Total Private Equity				$	15		$	21		$	―		$	―		$	2,487		$	2,427	$	2,502	$	2,448
	Total Absolute Return				$	26		$	―		$	1,141		$	1,175		$	1,006		$	658	$	2,173	$	1,833
	Commodities				$	―		$	―		$	―		$	88		$	―		$	―	$	―	$	88
	Cash and Cash Equivalents				$	287		$	301		$	617		$	1,017		$	―		$	―	$	904	$	1,318
	Total				$	4,367		$	4,182		$	6,574		$	6,229		$	3,877		$	3,484	$	14,818	$	13,895
	Other items to reconcile to fair
		value of plan assets																				$	-175	$	-6
	Fair value of plan assets																					$	14,643	$	13,889
Summary of changes in the fair values of the plans level 3 assets				Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
				Equities			Fixed Income			Private Equity			Absolute Return			Commodities			Total
	(Millions)
	Beginning balance at Jan. 1, 2013			$	421		$	2		$	2,136		$	865		$	107		$	3,531
	Net transfers into / (out of) level 3				―			―			―			-101			―			-101
	Purchases, sales, issuances, and
		settlements, net			-92			―			54			-104			-96			-238
	Realized gain / (loss)				10			―			126			46			-1			181
	Change in unrealized gains / (losses)
		relating to instruments sold during
		the period			-5			―			3			-30			-10			-42
	Change in unrealized gains / (losses)
		relating to instruments still held at
		the reporting date			63			―			108			-18			―			153
	Ending balance at Dec. 31, 2013				397			2			2,427			658			―			3,484
	Net transfers into / (out of) level 3				―			―			―			100			―			100
	Purchases, sales, issuances, and
		settlements, net			-43			-1			-260			205			―			-99
	Realized gain / (loss)				2			―			185			―			―			187
	Change in unrealized gains / (losses)
		relating to instruments sold during
		the period			-12			―			64			2			―			54
	Change in unrealized gains / (losses)
		relating to instruments still held at
		the reporting date			40			-1			71			41			―			151
	Ending balance at Dec. 31, 2014			$	384		$	―		$	2,487		$	1,006		$	―		$	3,877
International Qualified and Non-qualified Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Fair values of the assets held by the plans by asset category	The fair values of the assets held by the international pension plans by asset class are as follows:
					Fair Value Measurements Using Inputs Considered as																	Fair Value at
	(Millions)				Level 1						Level 2						Level 3					Dec. 31,
	Asset Class				2014			2013			2014			2013			2014			2013		2014		2013
	Equities
		Growth equities			$	672		$	733		$	176		$	190		$	―		$	―	$	848	$	923
		Value equities				595			653			23			14			―			―		618		667
		Core equities				19			19			642			668			4			5		665		692
	Total Equities				$	1,286		$	1,405		$	841		$	872		$	4		$	5	$	2,131	$	2,282
	Fixed Income
		Domestic government debt			$	87		$	199		$	542		$	539		$	3		$	3	$	632	$	741
		Foreign government debt				45			28			816			657			―			1		861		686
		Corporate debt securities				1			1			615			638			5			20		621		659
		Mortgage backed debt				―			―			82			75			―			―		82		75
		Other debt obligations				―			―			708			391			11			13		719		404
	Total Fixed Income				$	133		$	228		$	2,763		$	2,300		$	19		$	37	$	2,915	$	2,565
	Private Equity
		Private equity funds			$	―		$	―		$	―		$	―		$	23		$	22	$	23	$	22
		Real estate				3			3			73			87			55			53		131		143
	Total Private Equity				$	3		$	3		$	73		$	87		$	78		$	75	$	154	$	165
	Absolute Return
		Hedge funds			$	―		$	―		$	95		$	62		$	22		$	56	$	117	$	118
		Insurance				―			―			―			―			476			492		476		492
		Derivatives				―			2			-4			3			―			―		-4		5
		Other				―			―			13			2			3			2		16		4
	Total Absolute Return				$	―		$	2		$	104		$	67		$	501		$	550	$	605	$	619
	Cash and Cash Equivalents				$	161		$	112		$	32		$	14		$	―		$	―	$	193	$	126
	Total				$	1,583		$	1,750		$	3,813		$	3,340		$	602		$	667	$	5,998	$	5,757
	Other items to reconcile to fair
		value of plan assets																				$	-41	$	1
	Fair value of plan assets																					$	5,957	$	5,758
Summary of changes in the fair values of the plans level 3 assets				Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
				Equities			Fixed Income			Private Equity			Absolute Return			Total
	(Millions)
	Beginning balance at Jan. 1, 2013			$	5		$	36		$	71		$	485		$	597
	Net transfers into / (out of) level 3				―			―			―			―			―
	Foreign currency exchange				―			-2			-1			9			6
	Purchases, sales, issuances, and
		settlements, net			―			-2			1			50			49
	Realized gain / (loss)				―			―			2			―			2
	Change in unrealized gains / (losses)
		relating to instruments sold during
		the period			―			―			―			1			1
	Change in unrealized gains / (losses)
		relating to instruments still held at
		the reporting date			―			5			2			5			12
	Ending balance at Dec. 31, 2013				5			37			75			550			667
	Net transfers into / (out of) level 3				―			―			―			-32			-32
	Foreign currency exchange				-1			-4			-6			-64			-75
	Purchases, sales, issuances, and
		settlements, net			―			-14			-2			28			12
	Realized gain / (loss)				―			―			2			―			2
	Change in unrealized gains / (losses)
		relating to instruments sold during
		the period			―			-1			-1			―			-2
	Change in unrealized gains / (losses)
		relating to instruments still held at
		the reporting date			―			1			10			19			30
	Ending balance at Dec. 31, 2014			$	4		$	19		$	78		$	501		$	602
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Fair values of the assets held by the plans by asset category	The fair values of the assets held by the postretirement benefit plans by asset class are as follows:
					Fair Value Measurements Using Inputs Considered as																	Fair Value at
	(Millions)				Level 1						Level 2						Level 3					Dec. 31,
	Asset Class				2014			2013			2014			2013			2014			2013		2014		2013
	Equities
		U.S. equities			$	565		$	552		$	―		$	―		$	―		$	―	$	565	$	552
		Non-U.S. equities				56			58			―			―			―			―		56		58
		Index funds				―			―			38			44			―			―		38		44
		Long/short equity				―			―			3			―			14			16		17		16
	Total Equities				$	621		$	610		$	41		$	44		$	14		$	16	$	676	$	670
	Fixed Income
		U.S. government securities			$	68		$	62		$	186		$	202		$	―		$	―	$	254	$	264
		Non-U.S. government
			securities			―			1			17			14			―			―		17		15
		U.S. corporate bonds				―			―			119			96			―			―		119		96
		Non-U.S. corporate bonds				―			―			24			21			―			―		24		21
		Asset-backed securities				―			―			7			9			―			―		7		9
		Collateralized mortgage
			obligations			―			―			5			5			―			―		5		5
		Private placements				―			―			25			16			―			―		25		16
		Derivative instruments				―			―			5			―			―			―		5		―
		Other				―			―			1			1			―			―		1		1
	Total Fixed Income				$	68		$	63		$	389		$	364		$	―		$	―	$	457	$	427
	Private Equity
		Buyouts			$	―		$	―		$	―		$	―		$	56		$	58	$	56	$	58
		Derivative instruments				―			―			―			―			-3			-3		-3		-3
		Direct investments				―			―			―			―			19			16		19		16
		Distressed debt				―			―			―			―			8			7		8		7
		Growth equity				1			1			―			―			7			6		8		7
		Mezzanine				―			―			―			―			4			3		4		3
		Real estate				―			―			―			―			5			5		5		5
		Secondary				―			―			―			―			5			5		5		5
		Venture capital				―			―			―			―			58			64		58		64
	Total Private Equity				$	1		$	1		$	―		$	―		$	159		$	161	$	160	$	162
	Total Absolute Return				$	1		$	―		$	41		$	37		$	37		$	26	$	79	$	63
	Commodities				$	―		$	―		$	―		$	3		$	―		$	―	$	―	$	3
	Cash and Cash Equivalents				$	33		$	35		$	23		$	34		$	―		$	―	$	56	$	69
	Total				$	724		$	709		$	494		$	482		$	210		$	203	$	1,428	$	1,394
	Other items to reconcile to fair
		value of plan assets																				$	8	$	11
	Fair value of plan assets																					$	1,436	$	1,405
Summary of changes in the fair values of the plans level 3 assets				Fair Value Measurement Using Significant Unobservable Inputs (Level 3)
				Equities			Fixed Income			Private Equity			Absolute Return			Commodities			Total
	(Millions)
	Beginning balance at Jan. 1, 2013			$	16		$	―		$	170		$	28		$	4		$	218
	Net transfers into / (out of) level 3				―			―			―			―			―			―
	Purchases, sales, issuances, and
		settlements, net			-3			―			-27			-4			-4			-38
	Realized gain / (loss)				―			―			10			2			―			12
	Change in unrealized gains / (losses)
		relating to instruments sold during
		the period			―			―			-3			-1			―			-4
	Change in unrealized gains / (losses)
		relating to instruments still held at
		the reporting date			3			―			11			1			―			15
	Ending balance at Dec. 31, 2013				16			―			161			26			―			203
	Net transfers into / (out of) level 3				-2			―			―			―			―			-2
	Purchases, sales, issuances, and
		settlements, net			-2			―			-45			8			―			-39
	Realized gain / (loss)				―			―			29			―			―			29
	Change in unrealized gains / (losses)
		relating to instruments sold during
		the period			―			―			-5			―			―			-5
	Change in unrealized gains / (losses)
		relating to instruments still held at
		the reporting date			2			―			19			3			―			24
	Ending balance at Dec. 31, 2014			$	14		$	―		$	159		$	37		$	―		$	210

Derivatives_Tables

Derivatives (Tables)

12 Months Ended

Dec. 31, 2014

Derivatives

Gain (loss) on derivative instruments designated as cash flow hedges

Year Ended December 31, 2014

(Millions)

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative

Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income

Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income

Derivatives in Cash Flow Hedging Relationships

Amount

Location

Amount

Location

Amount

Foreign currency forward/option contracts

$

183

Cost of sales

$

3

Cost of sales

$

―

Commodity price swap contracts

-4

Cost of sales

2

Cost of sales

―

Interest rate swap contracts

-8

Interest expense

-1

Interest expense

―

Total

$

171

$

4

$

―

Year Ended December 31, 2013

(Millions)

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative

Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income

Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income

Derivatives in Cash Flow Hedging Relationships

Amount

Location

Amount

Location

Amount

Foreign currency forward/option contracts

$

9

Cost of sales

$

-11

Cost of sales

$

―

Foreign currency forward contracts

-108

Interest expense

-108

Interest expense

―

Commodity price swap contracts

1

Cost of sales

-2

Cost of sales

―

Interest rate swap contracts

―

Interest expense

-1

Interest expense

―

Total

$

-98

$

-122

$

―

Year Ended December 31, 2012

(Millions)

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative

Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income

Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income

Derivatives in Cash Flow Hedging Relationships

Amount

Location

Amount

Location

Amount

Foreign currency forward/option contracts

$

-35

Cost of sales

$

41

Cost of sales

$

―

Foreign currency forward contracts

42

Interest expense

42

Interest expense

―

Commodity price swap contracts

-4

Cost of sales

-10

Cost of sales

―

Interest rate swap contracts

―

Interest expense

-1

Interest expense

―

Total

$

3

$

72

$

―

Gain (loss) on derivative instruments designated as fair value hedges

Year ended December 31, 2014

Gain (Loss) on Derivative

Gain (Loss) on Hedged Item

(Millions)

Recognized in Income

Recognized in Income

Derivatives in Fair Value Hedging Relationships

Location

Amount

Location

Amount

Interest rate swap contracts

Interest expense

$

11

Interest expense

$

-11

Total

$

11

$

-11

Year ended December 31, 2013

Gain (Loss) on Derivative

Gain (Loss) on Hedged Item

(Millions)

Recognized in Income

Recognized in Income

Derivatives in Fair Value Hedging Relationships

Location

Amount

Location

Amount

Interest rate swap contracts

Interest expense

$

-21

Interest expense

$

21

Total

$

-21

$

21

Year ended December 31, 2012

Gain (Loss) on Derivative

Gain (Loss) on Hedged Item

(Millions)

Recognized in Income

Recognized in Income

Derivatives in Fair Value Hedging Relationships

Location

Amount

Location

Amount

Interest rate swap contracts

Interest expense

$

-5

Interest expense

$

5

Total

$

-5

$

5

Gain (loss) on derivative and non-derivative instruments designated as net investment hedges

Year ended December 31, 2014

Derivative and Nonderivative Instruments in Net Investment Hedging Relationships

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

Ineffective Portion of Gain (Loss) on Instrument and Amount Excluded from Effectiveness Testing Recognized in Income

(Millions)

Amount

Location

Amount

Foreign currency denominated debt

$

152

N/A

$

―

Foreign currency forward contracts

94

Cost of sales

1

Total

$

246

$

1

Year ended December 31, 2013

Derivative and Nonderivative Instruments in Net Investment Hedging Relationships

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

Ineffective Portion of Gain (Loss) on Instrument and Amount Excluded from Effectiveness Testing Recognized in Income

(Millions)

Amount

Location

Amount

Foreign currency denominated debt

$

-82

N/A

$

―

Foreign currency forward contracts

12

Cost of sales

―

Total

$

-70

$

―

Year ended December 31, 2012

Derivative and Nonderivative Instruments in Net Investment Hedging Relationships

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

Ineffective Portion of Gain (Loss) on Instrument and Amount Excluded from Effectiveness Testing Recognized in Income

(Millions)

Amount

Location

Amount

Foreign currency denominated debt

$

-29

N/A

$

―

Total

$

-29

$

―

Gain (loss) on derivative instruments not designated as hedging instruments

Derivatives Not Designated as Hedging Instruments

Year ended December 31, 2014

Year ended December 31, 2013

Gain (Loss) on Derivative Recognized in Income

Gain (Loss) on Derivative Recognized in Income

(Millions)

Location

Amount

Location

Amount

Foreign currency forward/option contracts

Cost of sales

$

10

Cost of sales

$

20

Foreign currency forward contracts

Interest expense

-40

Interest expense

-43

Commodity price swap contracts

Cost of sales

―

Cost of sales

-1

Total

$

-30

$

-24

Derivatives Not Designated as Hedging Instruments

Year ended December 31, 2012

Gain (Loss) on Derivative Recognized in Income

(Millions)

Location

Amount

Foreign currency forward/option contracts

Cost of sales

$

-24

Foreign currency forward contracts

Interest expense

22

Total

$

-2

Location and Fair Value of Derivative Instruments

31-Dec-14

(Millions)

Assets

Liabilities

Fair Value of Derivative Instruments

Location

Amount

Location

Amount

Derivatives designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

116

Other current liabilities

$

2

Foreign currency forward/option contracts

Other assets

47

Other liabilities

1

Commodity price swap contracts

Other current assets

―

Other current liabilities

4

Interest rate swap contracts

Other assets

27

Other liabilities

3

Total derivatives designated as

hedging instruments

$

190

$

10

Derivatives not designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

66

Other current liabilities

$

33

Total derivatives not designated as

hedging instruments

$

66

$

33

Total derivative instruments

$

256

$

43

December 31, 2013

(Millions)

Assets

Liabilities

Fair Value of Derivative Instruments

Location

Amount

Location

Amount

Derivatives designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

24

Other current liabilities

$

35

Commodity price swap contracts

Other current assets

1

Other current liabilities

―

Interest rate swap contracts

Other assets

8

Other liabilities

7

Total derivatives designated as

hedging instruments

$

33

$

42

Derivatives not designated as hedging instruments

Foreign currency forward/option contracts

Other current assets

$

51

Other current liabilities

$

68

Total derivatives not designated as

hedging instruments

$

51

$

68

Total derivative instruments

$

84

$

110

Offsetting Assets

Offsetting of Financial Assets/Liabilities under Master Netting Agreements with Derivative Counterparties

31-Dec-14

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Assets Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Liabilities

Cash Collateral Received

Net Amount of Derivative Assets

Derivatives subject to master

netting agreements

$

256

$

20

$

―

$

236

Derivatives not subject to master

netting agreements

―

―

Total

$

256

$

236

31-Dec-13

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Assets Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Liabilities

Cash Collateral Received

Net Amount of Derivative Assets

Derivatives subject to master

netting agreements

$

83

$

51

$

―

$

32

Derivatives not subject to master

netting agreements

1

1

Total

$

84

$

33

Offsetting Liabilities

31-Dec-14

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Liabilities Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Assets

Cash Collateral Pledged

Net Amount of Derivative Liabilities

Derivatives subject to master

netting agreements

$

36

$

20

$

―

$

16

Derivatives not subject to master

netting agreements

7

7

Total

$

43

$

23

31-Dec-13

Gross Amounts not Offset in the Consolidated Balance Sheet that are Subject to Master Netting Agreements

(Millions)

Gross Amount of Derivative Liabilities Presented in the Consolidated Balance Sheet

Gross Amount of Eligible Offsetting Recognized Derivative Assets

Cash Collateral Pledged

Net Amount of Derivative Liabilities

Derivatives subject to master

netting agreements

$

110

$

51

$

―

$

59

Derivatives not subject to master

netting agreements

―

―

Total

$

110

$

59

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Measurements

Fair Value, Assets and Liabilities Measured on Recurring Basis

Fair Value Measurements

(Millions)

Fair Value at

Using Inputs Considered as

Description

Dec. 31, 2014

Level 1

Level 2

Level 3

Assets:

Available-for-sale:

Marketable securities:

U.S. government agency securities

$

108

$

―

$

108

$

―

Foreign government agency securities

95

―

95

―

Corporate debt securities

619

―

619

―

Certificates of deposit/time deposits

41

―

41

―

Asset-backed securities:

Automobile loan related

282

―

282

―

Credit card related

162

―

162

―

Equipment lease related

48

―

48

―

Other

46

―

46

―

U.S. treasury securities

38

38

―

―

U.S. municipal securities

15

―

―

15

Investments

1

1

―

―

Derivative instruments — assets:

Foreign currency forward/option contracts

229

―

229

―

Interest rate swap contracts

27

―

27

―

Liabilities:

Derivative instruments — liabilities:

Foreign currency forward/option contracts

36

―

36

―

Commodity price swap contracts

4

―

4

―

Interest rate swap contracts

3

―

3

―

Fair Value Measurements

(Millions)

Fair Value at

Using Inputs Considered as

Description

Dec. 31, 2013

Level 1

Level 2

Level 3

Assets:

Available-for-sale:

Marketable securities:

U.S. government agency securities

$

234

$

―

$

234

$

―

Foreign government agency securities

125

―

125

―

Corporate debt securities

781

―

781

―

Certificates of deposit/time deposits

40

―

40

―

Commercial paper

60

―

60

―

Asset-backed securities:

Automobile loan related

585

―

585

―

Credit card related

180

―

180

―

Equipment lease related

67

―

67

―

Other

75

―

75

―

U.S. treasury securities

49

49

―

―

U.S. municipal securities

2

―

2

―

Auction rate securities

11

―

―

11

Investments

2

2

―

―

Derivative instruments — assets:

Foreign currency forward/option contracts

75

―

75

―

Commodity price swap contracts

1

―

1

―

Interest rate swap contracts

8

―

8

―

Liabilities:

Derivative instruments — liabilities:

Foreign currency forward/option contracts

103

―

103

―

Interest rate swap contracts

7

―

7

―

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

(Millions)

Marketable securities – auction rate securities and certain U.S. municipal securities only

2014

2013

2012

Beginning balance

$

11

$

7

$

4

Total gains or losses:

Included in earnings

-1

―

―

Included in other comprehensive income

2

4

3

Purchases and issuances

15

―

―

Sales and settlements

-12

―

―

Transfers in and/or out of level 3

―

―

―

Ending balance (December 31)

15

11

7

Change in unrealized gains or losses for the period included in

earnings for securities held at the end of the reporting period

―

―

―

Fair Value of Financial Instruments by Balance Sheet Grouping

31-Dec-14

31-Dec-13

Carrying

Fair

Carrying

Fair

(Millions)

Value

Value

Value

Value

Eurobond securities (repaid July 2014)

$

―

$

―

$

1,424

$

1,447

Long-term debt, excluding current portion

6,731

7,203

4,326

4,463

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies
Minimum lease payments under capital and operating leases with non-cancelable terms in excess of one year			Capital Leases		Operating Leases
	(Millions)
	2015		$	11	$	225
	2016			11		164
	2017			7		126
	2018			4		75
	2019			3		54
	After 2019			37		187
		Total	$	73	$	831
	Less: Amounts representing interest			6
	Present value of future minimum lease payments			67
	Less: Current obligations under capital leases			8
	Long-term obligations under capital leases		$	59

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Stock-Based Compensation
Stock-Based Compensation Expense	Stock-Based Compensation Expense
			Years ended December 31
	(Millions)		2014			2013			2012
	Cost of sales		$	47		$	27		$	27
	Selling, general and administrative expenses			192			183			167
	Research, development and related expenses			41			30			29
	Stock-based compensation expenses		$	280		$	240		$	223
	Income tax benefits		$	-79		$	-71		$	-67
	Stock-based compensation expenses, net of tax		$	201		$	169		$	156
Stock Option Activity	Stock Option Program
	The following table summarizes stock option activity for the years ended December 31:
					2014					2013					2012
					Number of Options		Weighted Average Exercise Price			Number of Options		Weighted Average Exercise Price			Number of Options		Weighted Average Exercise Price
	Under option —
		January 1			43,938,778		$	83.84		56,565,030		$	80.33		64,148,415		$	77.28
		Granted:
			Annual		5,736,183			126.77		6,220,810			101.55		5,770,190			87.91
			Progressive (Reload)		―			―		140,447			109.83		110,065			89.65
			Other		―			―		191			119.62		51,661			89.25
		Exercised			-10,219,261			82.37		-18,825,218			79.25		-13,123,617			68.78
		Canceled			-220,143			105.11		-162,482			89.92		-391,684			83.65
		31-Dec			39,235,557		$	90.38		43,938,778		$	83.84		56,565,030		$	80.33
	Options exercisable
		31-Dec			27,502,208		$	81.42		32,038,228		$	79.58		45,207,143		$	78.78
Stock Option Assumptions	Stock Option Assumptions
			Annual												Progressive (Reload)
			2014				2013				2012				2014				2013			2012
	Exercise price		$	126.72			$	101.49			$	87.89			$	―			$	109.84		$	87.89
	Risk-free interest rate			1.9	%			1.2	%			1.1	%			―	%			0.2	%		0.2	%
	Dividend yield			2.6	%			2.7	%			2.6	%			―	%			2.7	%		2.6	%
	Volatility			20.8	%			20	%			24.5	%			―	%			16.3	%		23.4	%
	Expected life (months)			75				75				74				―				12			19
	Black-Scholes fair value		$	19.63			$	13.46			$	14.94			$	―			$	6.42		$	8.5
Restricted Stock Units and Restricted Stock Activity	Restricted Stock and Restricted Stock Units
	The following table summarizes restricted stock and restricted stock unit activity for the years ended December 31:
						2014					2013					2012
								Weighted Average					Weighted Average					Weighted Average
						Number of		Grant Date			Number of		Grant Date			Number of		Grant Date
						Awards		Fair Value			Awards		Fair Value			Awards		Fair Value
	Nonvested balance —
		As of January 1				3,105,361		$	92.31		3,261,562		$	85.17		4,858,972		$	73.02
			Granted
				Annual		798,615			126.79		946,774			101.57		968,522			87.92
				Other		78,252			152.74		44,401			111.19		99,337			85.07
			Vested			-1,100,675			90.37		-1,100,095			79.93		-2,594,468			63.51
			Forfeited			-63,767			97.23		-47,281			90.82		-70,801			82.65
		As of December 31				2,817,786		$	104.41		3,105,361		$	92.31		3,261,562		$	85.17
Performance Shares Activity	The following table summarizes performance share activity for the years ended December 31:
						2014					2013					2012
								Weighted Average					Weighted Average					Weighted Average
						Number of		Grant Date			Number of		Grant Date			Number of		Grant Date
						Awards		Fair Value			Awards		Fair Value			Awards		Fair Value
	Undistributed balance —
		As of January 1				895,635		$	88.12		1,089,084		$	79.27		878,872		$	78.55
			Granted			305,225			124.89		353,734			96.87		467,531			81.55
			Distributed			-277,358			84.74		-507,083			75.16		―			―
			Performance change			212,461			109.74		-6,949			77.01		-178,838			81.27
			Forfeited			-36,212			109.44		-33,151			91.34		-78,481			80.21
		As of December 31				1,099,752		$	102.65		895,635		$	88.12		1,089,084		$	79.27
General Employees' Stock Purchase Plan (GESPP)	General Employees' Stock Purchase Plan
						2014					2013					2012
								Weighted					Weighted					Weighted
								Average					Average					Average
						Shares		Exercise Price			Shares		Exercise Price			Shares		Exercise Price
	Options granted					1,073,956		$	118.73		1,259,247		$	93.46		1,455,545		$	75.32
	Options exercised					-1,073,956			118.73		-1,259,247			93.46		-1,455,545			75.32
	Shares available for grant -
		31-Dec				29,112,004					30,185,960					31,445,207

Business_Segments_Tables

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2014
Business Segments
Business Segment Information	Business Segment Products
	Business Segment	Major Products
	Industrial	Tapes, coated, nonwoven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, filtration products, closure systems for personal hygiene products, acoustic systems products, automotive components, abrasion-resistant films, structural adhesives and paint finishing and detailing products
	Safety and Graphics	Personal protection products, traffic safety and security products, commercial graphics systems, commercial cleaning and protection products, floor matting, and roofing granules for asphalt shingles
	Electronics and Energy	Optical films solutions for electronic displays, packaging and interconnection devices, insulating and splicing solutions for the electronics, telecommunications and electrical industries, touch screens and touch monitors, renewable energy component solutions, and infrastructure protection products
	Health Care	Medical and surgical supplies, skin health and infection prevention products, drug delivery systems, dental and orthodontic products, health information systems and food safety products
	Consumer	Sponges, scouring pads, high-performance cloths, consumer and office tapes, repositionable notes, indexing systems, construction and home improvement products, home care products, protective material products, and consumer and office tapes and adhesives
	Business Segment Information
		Net Sales						Operating Income
	(Millions)	2014		2013		2012		2014		2013		2012
	Industrial	$	10,990	$	10,657	$	10,008	$	2,389	$	2,307	$	2,244
	Safety and Graphics		5,732		5,584		5,406		1,296		1,227		1,210
	Electronics and Energy		5,604		5,393		5,458		1,115		954		1,026
	Health Care		5,572		5,334		5,138		1,724		1,672		1,641
	Consumer		4,523		4,435		4,386		995		945		943
	Corporate and Unallocated		4		8		4		-251		-321		-472
	Elimination of Dual Credit		-604		-540		-496		-133		-118		-109
	Total Company	$	31,821	$	30,871	$	29,904	$	7,135	$	6,666	$	6,483
		Assets						Depreciation & Amortization						Capital Expenditures
	(Millions)	2014		2013		2012		2014		2013		2012		2014		2013		2012
	Industrial	$	8,508	$	8,833	$	8,614	$	383	$	373	$	324	$	395	$	511	$	416
	Safety and Graphics		4,939		5,122		5,085		234		255		237		221		207		189
	Electronics and Energy		5,116		5,336		5,512		271		260		266		232		261		350
	Health Care		4,344		4,329		4,296		181		171		169		169		120		113
	Consumer		2,434		2,516		2,445		108		106		110		111		128		105
	Corporate and Unallocated		5,928		7,414		7,924		231		206		182		365		438		311
	Total Company	$	31,269	$	33,550	$	33,876	$	1,408	$	1,371	$	1,288	$	1,493	$	1,665	$	1,484

Geographic_Areas_Tables

Geographic Areas (Tables)	12 Months Ended
	Dec. 31, 2014
Geographic Areas Disclosure
Geographic Areas														Property, Plant and Equipment - net
		Net Sales						Operating Income
	(Millions)	2014		2013		2012		2014		2013		2012		2014		2013
	United States	$	11,714	$	11,151	$	10,571	$	2,540	$	2,210	$	1,938	$	4,619	$	4,478
	Asia Pacific		9,418		9,047		9,092		2,487		2,386		2,450		1,798		1,943
	Europe, Middle East and Africa		7,198		7,085		6,730		1,234		1,168		1,163		1,502		1,636
	Latin America and Canada		3,504		3,611		3,529		867		908		936		570		595
	Other Unallocated		-13		-23		-18		7		-6		-4		―		―
	Total Company	$	31,821	$	30,871	$	29,904	$	7,135	$	6,666	$	6,483	$	8,489	$	8,652

Quarterly_Data_Unaudited_Table

Quarterly Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Data (Unaudited)
Schedule of Quarterly Financial Information
	(Millions, except per-share amounts)		First		Second		Third		Fourth		Year
	2014		Quarter		Quarter		Quarter		Quarter		2014
	Net sales		$	7,831	$	8,134	$	8,137	$	7,719	$	31,821
	Cost of sales			4,031		4,184		4,205		4,027		16,447
	Net income including noncontrolling interest			1,225		1,283		1,311		1,179		4,998
	Net income attributable to 3M			1,207		1,267		1,303		1,179		4,956
	Earnings per share attributable to 3M
		common shareholders - basic		1.83		1.94		2.02		1.85		7.63
	Earnings per share attributable to 3M
		common shareholders - diluted		1.79		1.91		1.98		1.81		7.49
	(Millions, except per-share amounts)		First		Second		Third		Fourth		Year
	2013		Quarter		Quarter		Quarter		Quarter		2013
	Net sales		$	7,634	$	7,752	$	7,916	$	7,569	$	30,871
	Cost of sales			3,969		4,013		4,148		3,976		16,106
	Net income including noncontrolling interest			1,147		1,213		1,245		1,116		4,721
	Net income attributable to 3M			1,129		1,197		1,230		1,103		4,659
	Earnings per share attributable to 3M
		common shareholders - basic		1.63		1.74		1.81		1.65		6.83
	Earnings per share attributable to 3M
		common shareholders - diluted		1.61		1.71		1.78		1.62		6.72

Significant_Accounting_Policie3

Significant Accounting Policies (Details)	3 Months Ended								12 Months Ended				3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Jun. 30, 2014
	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	USD ($)	VEF	Business Segments
													Electronics and Energy
													Divisions
Basis Of Presentation
Number of existing divisions affected by division combination													3
Number of affected divisions that exist after the division combination													2
Foreign Currency Translation
Threshold percentage used to determine if economic environment is highly inflationary									100.00%
Number of years used to determine if economic environment is highly inflationary									3 years
Operating income of Venezuelan subsidiary as percent of consolidated amount high end of range									1.00%
Cumulative inflation rate of Venezuela in November 2009 and since, low end of range									100.00%
Maximum balance of company's net monetary liabilities in Venezuelan bolivars												150
Maximum balance of intercompany receivables due to 3M Company from its Venezuelan subsidiary	20								20
Exchange rate established by Venezuelan government from bolivars to dollars - SICAD1	10								10
Exchange rate established by Venezuelan government from bolivars to dollars - SICAD2	50								50
Earnings per share
Options outstanding not included in computation of diluted earnings per share (in shares)									1.4	2	12.6
Numerator:
Net income attributable to 3M	$1,179	$1,303	$1,267	$1,207	$1,103	$1,230	$1,197	$1,129	$4,956	$4,659	$4,444
Denominator:
Denominator for weighted average 3M common shares outstanding - basic (in shares)									649.2	681.9	693.9
Dilution associated with the Company's stock-based compensation plans (in shares)									12.8	11.7	9.4
Denominator for weighted average 3M common shares outstanding - diluted (in shares)									662	693.6	703.3
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$1.85	$2.02	$1.94	$1.83	$1.65	$1.81	$1.74	$1.63	$7.63	$6.83	$6.40
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$1.81	$1.98	$1.91	$1.79	$1.62	$1.78	$1.71	$1.61	$7.49	$6.72	$6.32

Significant_Accounting_Policie4

Significant Accounting Policies (Details 2) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash and cash equivalents
Cash and cash equivalents classification when acquired, maximum maturity period	3 months
Marketable securities
Marketable securities classification, minimum holding period for classification as non-current	1 year
Finite Lived Intangible Assets
Asset retirement obligation liability	$96	$90
Advertising and merchandising expense	407	423	482
Research, development and related expenses	1,770	1,715	1,634
Research and development expense	1,193	1,150	1,079
Deferred tax assets valuation allowance	$22	$23
Maximum
Finite Lived Intangible Assets
Intangible assets useful life	20 years
Maximum | Customer related intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	10 years
Maximum | Patents
Finite Lived Intangible Assets
Intangible assets useful life	10 years
Maximum | Other technology-based intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	12 years
Maximum | Definite-lived tradenames
Finite Lived Intangible Assets
Intangible assets useful life	20 years
Maximum | Other amortizable intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	10 years
Minimum
Finite Lived Intangible Assets
Intangible assets useful life	1 year
Minimum | Customer related intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	2 years
Minimum | Patents
Finite Lived Intangible Assets
Intangible assets useful life	5 years
Minimum | Other technology-based intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	5 years
Minimum | Definite-lived tradenames
Finite Lived Intangible Assets
Intangible assets useful life	2 years
Minimum | Other amortizable intangible assets
Finite Lived Intangible Assets
Intangible assets useful life	2 years
Buildings and improvements | Maximum
Property, plant and equipment - at cost
Estimated useful life	40 years
Estimated useful life, majority of the assets	40 years
Buildings and improvements | Minimum
Property, plant and equipment - at cost
Estimated useful life	10 years
Estimated useful life, majority of the assets	20 years
Machinery and equipment | Maximum
Property, plant and equipment - at cost
Estimated useful life	15 years
Estimated useful life, majority of the assets	10 years
Machinery and equipment | Minimum
Property, plant and equipment - at cost
Estimated useful life	3 years
Estimated useful life, majority of the assets	5 years
Internal use software | Maximum
Property, plant and equipment - at cost
Estimated useful life	7 years
Internal use software | Minimum
Property, plant and equipment - at cost
Estimated useful life	3 years

Acquisitions_Details

Acquisitions (Details)	12 Months Ended			1 Months Ended	12 Months Ended								1 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2012
	USD ($)	USD ($)	USD ($)	Sumitomo 3M Limited [Member]	Maximum [Member]	Maximum [Member]	Minimum [Member]	Minimum [Member]	Weighted Average [Member]	Weighted Average [Member]	Static control business	Other Acquisitions	Federal Signal Technologies Group	Ceradyne Inc.
	Acquisition	Acquisition	Acquisition	JPY (¥)							USD ($)	USD ($)	USD ($)	USD ($)
Business Acquisitions Information
Accounts receivable			$84,000,000									$29,000,000		$55,000,000
Inventory			125,000,000									13,000,000		112,000,000
Other current assets			37,000,000									1,000,000		36,000,000
Marketable securities			250,000,000									0		250,000,000
Property, plant and equipment			241,000,000									3,000,000		238,000,000
Purchased finite-lived intangible assets	34,000,000		213,000,000									86,000,000		127,000,000
Purchased indefinite-lived intangible assets			2,000,000									2,000,000		0
Purchased goodwill			339,000,000									141,000,000		198,000,000
Accounts payable and other liabilities, net of other assets			-127,000,000									-27,000,000		-100,000,000
Interest bearing debt			-96,000,000									-3,000,000		-93,000,000
Deferred tax asset/(liability)			-22,000,000									3,000,000		-25,000,000
Net assets acquired			1,046,000,000									248,000,000		798,000,000
Supplemental information:
Cash paid			1,098,000,000									248,000,000		850,000,000
Less: Cash acquired			52,000,000									0		52,000,000
Cash paid, net of cash acquired	94,000,000	0	1,046,000,000									248,000,000	104,000,000	798,000,000
Number of business combinations completed	1	0	3
Sales of static business											46,000,000
Finite Lived Intangible Assets
Intangible assets useful life					10 years	20 years	3 years	2 years	6 years	12 years
Transactions with 3M subsidiaries that have non controlling interests
Percent of interest acquired of Sumitomo 3M Limited				25.00%
Amount of acquisition for remaining non-controlling interest				¥ 90,000,000,000

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Goodwill balance by business segment) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Acquisition	Acquisition	Acquisition
Goodwill Information
Goodwill acquired during the period which is deductible for tax purposes	$0
Increase (decrease) in goodwill related to preliminary allocation of purchase price for prior acquisitions		10,000,000
Goodwill
Balance at the beginning of the period	7,345,000,000	7,385,000,000
Acquisition activity	65,000,000	10,000,000
Translation and other	-360,000,000	-50,000,000
Balance at the end of the period	7,050,000,000	7,345,000,000	7,385,000,000
Number of business combinations completed	1	0	3
Amount of Goodwill impairment	0	0
Industrial
Goodwill
Balance at the beginning of the period	2,166,000,000	2,174,000,000
Acquisition activity	0	10,000,000
Translation and other	-129,000,000	-18,000,000
Balance at the end of the period	2,037,000,000	2,166,000,000
Safety and Graphics
Goodwill
Balance at the beginning of the period	1,740,000,000	1,751,000,000
Acquisition activity	0	0
Translation and other	-90,000,000	-11,000,000
Balance at the end of the period	1,650,000,000	1,740,000,000
Electronics and Energy
Goodwill
Balance at the beginning of the period	1,612,000,000	1,622,000,000
Acquisition activity	0	0
Translation and other	-53,000,000	-10,000,000
Balance at the end of the period	1,559,000,000	1,612,000,000
Health Care
Goodwill
Balance at the beginning of the period	1,596,000,000	1,598,000,000
Acquisition activity	65,000,000	0
Translation and other	-72,000,000	-2,000,000
Balance at the end of the period	1,589,000,000	1,596,000,000
Consumer
Goodwill
Balance at the beginning of the period	231,000,000	240,000,000
Acquisition activity	0	0
Translation and other	-16,000,000	-9,000,000
Balance at the end of the period	$215,000,000	$231,000,000

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Acquired Intangible Assets) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Acquired intangible assets disclosures
Total gross carrying amount	$2,958	$3,047
Total accumulated amortization	-1,646	-1,488
Total finite-lived intangible assets - net	1,312	1,559
Non-amortizable intangible assets (primarily tradenames)	123	129
Total intangible assets - net	1,435	1,688
Purchased finite-lived intangible assets	34		213
Customer related intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	1,348	1,411
Total accumulated amortization	-597	-514
Patents
Acquired intangible assets disclosures
Total gross carrying amount	581	602
Total accumulated amortization	-472	-458
Other technology-based intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	407	406
Total accumulated amortization	-215	-179
Definite-lived tradenames
Acquired intangible assets disclosures
Total gross carrying amount	401	411
Total accumulated amortization	-195	-178
Other amortizable intangible assets
Acquired intangible assets disclosures
Total gross carrying amount	221	217
Total accumulated amortization	($167)	($159)

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets (Schedules for Amortization Expense) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite Lived Intangible Assets
Amortization expense for acquired intangible assets	$228	$236	$233
Expected amortization expense for acquired intangible assets recorded as of balance sheet date
2015	204
2016	176
2017	154
2018	139
2019	128
After 2019	$511

Supplemental_Balance_Sheet_Inf2

Supplemental Balance Sheet Information (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Other current assets
Prepaid expenses and other	$595	$602
Deferred income taxes	444	502
Derivative assets-current	182	76
Insurance related receivables prepaid expenses and other	77	99
Total other current assets	1,298	1,279
Investments
Equity method	58	69
Cost method	41	45
Other investments	3	8
Total investments	102	122
Other assets
Deferred income taxes	889	360
Insurance related receivables and other	89	96
Cash surrender value of life insurance policies	245	236
Other	331	288
Total other assets	1,554	980
Other current liabilities
Accrued trade payables	533	547
Deferred income	541	521
Derivative liabilities	39	103
Dividends payable	648	567
Employee benefits and withholdings	172	195
Contingent liability claims and other	157	119
Property and other taxes	90	88
Pension and postretirement benefits	60	61
Deferred income taxes	34	37
Other	644	653
Total other current liabilities	2,918	2,891
Other liabilities
Long term income taxes payable	519	472
Employee benefits	262	315
Contingent liability claims and other	300	314
Long-term obligations under capital leases	59	58
Deferred income	21	19
Deferred income taxes	141	538
Other	253	268
Total other liabilities	1,555	1,984
Drafts payable
Drafts payable on demand included in Accounts payable	$1	$24

Supplemental_Balance_Sheet_Inf3

Supplemental Balance Sheet Information (Details 1) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Property Plant And Equipment [Line Items]
Gross property, plant and equipment	$22,841	$23,068
Less: Accumulated depreciation	-14,352	-14,416
Property, Plant and Equipment - net	8,489	8,652
Accumulated depreciation for capital leases included in Accumulated depreciation	87	85
Land
Property Plant And Equipment [Line Items]
Gross property, plant and equipment	368	411
Buildings and leasehold improvements
Property Plant And Equipment [Line Items]
Gross property, plant and equipment	6,943	7,062
Machinery and equipment
Property Plant And Equipment [Line Items]
Gross property, plant and equipment	14,684	14,665
Construction in progress
Property Plant And Equipment [Line Items]
Gross property, plant and equipment	679	772
Capital leases
Property Plant And Equipment [Line Items]
Gross property, plant and equipment	$167	$158

Supplemental_Equity_and_Compre2

Supplemental Equity and Comprehensive Income Information (Details 1) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Equity and Comprehensive Income Information
Common stock, par value per share (in dollars per share)	$0.01	$0.01
Common stock, shares authorized (in shares)	3,000,000,000
Common stock, shares issued (in shares)	944,033,056
Treasury stock (in shares)	308,898,462	280,736,817	256,941,406	249,063,015
Preferred stock, shares authorized	10,000,000

Supplemental_Equity_and_Compre3

Supplemental Equity and Comprehensive Income Information (Details 2) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss)
Balance at Beginning of Period	($3,913)	($4,750)	($5,025)
Other comprehensive income (loss), before tax:
Amounts before reclassification	-3,321	801	-62
Amounts reclassified out	357	691	543
Total other comprehensive income (loss), before tax	-2,964	1,492	481
Tax effect	563	-655	-206
Total other comprehensive income (loss), net of tax	-2,401	837	275
Impact From Purchase Of Subsidiary Shares	25
Balance at End of Period	-6,289	-3,913	-4,750
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at Beginning of Period	-188	230	114
Other comprehensive income (loss), before tax:
Amounts before reclassification	-856	-462	133
Amounts reclassified out	0	0	0
Total other comprehensive income (loss), before tax	-856	-462	133
Tax effect	-92	44	-17
Total other comprehensive income (loss), net of tax	-948	-418	116
Impact From Purchase Of Subsidiary Shares	41
Balance at End of Period	-1,095	-188	230
Defined Benefit Pension and Postretirement Plans Adjustment
Accumulated Other Comprehensive Income (Loss)
Balance at Beginning of Period	-3,715	-4,955	-5,155
Other comprehensive income (loss), before tax:
Amounts before reclassification	-2,638	1,361	-204
Amounts reclassified out	360	569	615
Total other comprehensive income (loss), before tax	-2,278	1,930	411
Tax effect	716	-690	-211
Total other comprehensive income (loss), net of tax	-1,562	1,240	200
Impact From Purchase Of Subsidiary Shares	-16
Balance at End of Period	-5,293	-3,715	-4,955
Debt and Equity Securities, Unrealized Gain (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance at Beginning of Period	-2	-2	-6
Other comprehensive income (loss), before tax:
Amounts before reclassification	2	0	6
Amounts reclassified out	1	0	0
Total other comprehensive income (loss), before tax	3	0	6
Tax effect	-1	0	-2
Total other comprehensive income (loss), net of tax	2	0	4
Impact From Purchase Of Subsidiary Shares	0
Balance at End of Period	0	-2	-2
Cash Flow Hedging Instruments Unrealized Gain (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance at Beginning of Period	-8	-23	22
Other comprehensive income (loss), before tax:
Amounts before reclassification	171	-98	3
Amounts reclassified out	-4	122	-72
Total other comprehensive income (loss), before tax	167	24	-69
Tax effect	-60	-9	24
Total other comprehensive income (loss), net of tax	107	15	-45
Impact From Purchase Of Subsidiary Shares	0
Balance at End of Period	$99	($8)	($23)

Supplemental_Equity_and_Compre4

Supplemental Equity and Comprehensive Income Information (Details 3) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amount Reclassified from Accumulated Other Comprehensive Income
Selling, general and administrative expenses	($6,469)	($6,384)	($6,102)
Total before tax	-2,964	1,492	481
Tax effect	-2,028	-1,841	-1,840
Net of tax	2,555	5,496	4,719
Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Net of tax	-236	-449	-350
Defined Benefit Pension and Postretirement Plans Adjustment
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	-2,278	1,930	411
Defined Benefit Pension and Postretirement Plans Adjustment | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Transition asset	1	1	1
Prior service benefit	59	77	84
Net actuarial loss	-420	-647	-700
Total before tax	-360	-569	-615
Tax effect	122	197	219
Net of tax	-238	-372	-396
Debt and Equity Securities, Unrealized Gain (Loss)
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	3	0	6
Debt and Equity Securities, Unrealized Gain (Loss) | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Selling, general and administrative expenses	-1	0	0
Total before tax	-1	0	0
Tax effect	0	0	0
Net of tax	-1	0	0
Cash Flow Hedging Instruments Unrealized Gain (Loss)
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	167	24	-69
Cash Flow Hedging Instruments Unrealized Gain (Loss) | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Total before tax	4	-122	72
Tax effect	-1	45	-26
Net of tax	3	-77	46
Cash Flow Hedging Instruments Unrealized Gain (Loss) | Foreign currency forward/option contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	3	-11	41
Cash Flow Hedging Instruments Unrealized Gain (Loss) | Foreign currency forward contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Interest expense	0	-108	42
Cash Flow Hedging Instruments Unrealized Gain (Loss) | Commodity price swap contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	2	-2	-10
Cash Flow Hedging Instruments Unrealized Gain (Loss) | Interest rate swap contracts | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Amount Reclassified from Accumulated Other Comprehensive Income
Interest expense	($1)	($1)	($1)

Supplemental_Equity_and_Compre5

Supplemental Equity and Comprehensive Income Information (Details 4)	12 Months Ended				1 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Mar. 31, 2014	Sep. 30, 2014
	USD ($)	Common Stock and Additional Paid-in Capital	Noncontrolling Interest	3M India Limited	Sumitomo 3M Limited
		USD ($)	USD ($)		JPY (¥)
Transactions with 3M subsidiaries that have non controlling interests
3M's effective ownership before transaction (as a percent)				76.00%
3M's effective ownership after transaction (as a percent)				75.00%	100.00%
Minimum percentage of public shareholding required by an amendment to Indian Securities regulations to comply with the sale of shares for 3M India Limited				25.00%
Sale of subsidiary shares	$8,000,000	$7,000,000	$1,000,000
Percent of interest acquired of Sumitomo 3M Limited					25.00%
Amount of acquisition for remaining non-controlling interest					¥ 90,000,000,000

Supplemental_Equity_and_Compre6

Supplemental Equity and Comprehensive Income Information (Details 5) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effect of noncontrolling interest transactions on equity attributable to 3M Company shareholders
Net income attributable to 3M	$1,179	$1,303	$1,267	$1,207	$1,103	$1,230	$1,197	$1,129	$4,956	$4,659	$4,444
Impact of purchase of subsidiary shares									-409
Change in 3M Company shareholder's equity from net income attributable to 3M and impact of purchase of subsidiary shares									$4,547

Supplemental_Equity_and_Compre7

Supplemental Equity and Comprehensive Income Information (Details 7) (USD $)	1 Months Ended		3 Months Ended				12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Equity and Comprehensive Income Information
Dividends that have been declared but not yet paid (in dollars per share)	$1.02	$0.86
Dividends declared in current period (in dollars per share)			$0.86	$0.86	$0.86		$3.59	$3.40	$2.36
Dividends paid in current period (in dollars per share)						$0.86	$3.42	$2.54	$2.36

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flow Elements
Cash income tax payments, net of refunds	$1,968	$1,803	$1,717
Cash interest payments	178	169	166
Capitalized interest	$15	$21	$23

Supplemental_Cash_Flow_Informa3

Supplemental Cash Flow Information (Details 1) (USD $)	1 Months Ended		3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Jun. 30, 2014
Transactions related to investing activities with significant non-cash components
Dividends that have been declared but not yet paid (in dollars per share)	$1.02	$0.86
Increase of Current Liabilities due to dividend declared but not paid	$648	$567
Sumitomo 3M Limited administrative headquarters sale
Transactions related to investing activities with significant non-cash components
Note receivable due				78
Deferred profit from sale of Sumitomo 3M Limited				49
Non-strategic equity interest sale within Health Care
Transactions related to investing activities with significant non-cash components
Note receivable due			24
Gain on sale of non-strategic equity investment within Health Care Business Group			18
City of Nevada, MO
Transactions related to investing activities with significant non-cash components
City of Nevada, MO Municipal Bond Value	$15

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Before Income Taxes
United States	$3,815	$3,194	$2,902
International	3,211	3,368	3,449
Income before income taxes	$7,026	$6,562	$6,351

Income_Taxes_Details_1

Income Taxes (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Currently payable
Federal	$1,103	$948	$743
State	108	91	75
International	1,008	901	918
Deferred
Federal	-171	-123	-3
State	-9	-2	10
International	-11	26	97
Total provision for income taxes	$2,028	$1,841	$1,840

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Accruals not currently deductible
Employee benefit costs	$148	$140
Product and other claims	152	155
Miscellaneous accruals	137	130
Pension costs	1,312	447
Stock-based compensation	290	322
Net operating/capital loss carryforwards	175	225
Foreign tax credits	360	316
Inventory	221	221
Gross deferred tax assets	2,795	1,956
Valuation allowance	-22	-23
Total deferred tax assets	2,773	1,933
Deferred tax liabilities:
Product and other insurance receivables	-31	-46
Accelerated depreciation	-804	-813
Intangible amortization	-719	-780
Other	-61	-7
Total deferred tax liabilities	-1,615	-1,646
Net deferred tax asset	$1,158	$287

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Effective Income Tax Rate
Statutory U.S. tax rate	35.00%	35.00%	35.00%
State income taxes--net of federal benefit	0.90%	0.90%	0.90%
International income taxes - net	-5.80%	-6.30%	-4.20%
U.S. research and development credit	-0.40%	-0.70%	0.00%
Reserves for tax contingencies	0.60%	1.20%	-1.90%
Domestic manufacturer's deduction	-1.30%	-1.60%	-1.20%
All other--net	-0.10%	-0.40%	0.40%
Effective tax rate (as a percent)	28.90%	28.10%	29.00%
Federal, State and Foreign Tax
Gross UTB Balance at January 1	$659	$528	$594
Additions based on tax positions related to the current year	201	97	80
Additions for tax positions of prior years	30	158	114
Reductions for tax positions of prior years	-74	-29	-120
Settlements (UTB decreases)	-154	-17	-50
Reductions due to lapse of applicable statute of limitations	-79	-78	-90
Gross UTB Balance at December 31	583	659	528
Income tax
Net UTB impacting the effective tax rate	265	262	185
Period discussed over which the Company is not able to reasonably estimate the amount by which the liability for unrecognized tax benefits could change as a result of ongoing income tax authority examinations	12 months
Interest and penalties related to unrecognized tax benefits, expense (benefit) recognized on a gross basis	-14	22	-12
Interest and penalties related to unrecognized tax benefits, accrued on a gross basis	44	62
Change in effective income tax rate from prior reporting period to current reporting period (as a percent)	0.80%	-0.90%
Impact of factors that decreased the effective tax rate from prior reporting period to current reporting period (as a percent)	-0.80%	-4.00%
Impact of factors that increased the effective tax rate from prior reporting period to current reporting period (as a percent)	1.60%	3.10%
Amount of years inclusion of US R&D credit due to reinstatement in 2013		2 years
Deferred tax assets valuation allowance	22	23
Federal
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers	24
Federal | Maximum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	16 years
Federal | Minimum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	15 years
State
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers	3
State | Maximum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	10 years
State | Minimum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	5 years
International
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers	$148
Tax effected operating loss, capital loss, and tax credit carryovers, expiration dates majority of high end of range	5 years
International | Minimum
Tax effected operating loss, capital loss, and tax credit carryovers
Tax effected operating loss, capital loss, and tax credit carryovers, expiration date	1 year

Income_Taxes_Details_5

Income Taxes (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes
Income tax benefits attributable to reduced tax rates or exemptions in foreign locations	$111,000,000	$87,000,000	$64,000,000
EPS impact of reduced tax rates or exemptions in foreign locations (in dollars per diluted share)	$0.17	$0.13	$0.09
Undistributed earnings of non-U.S. subsidiaries	$11,200,000,000

Marketable_Securities_Narrativ

Marketable Securities (Narratives) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	CreditRatingAgency
Marketable Securities
Gross unrealized losses (pre-tax) on marketable securities	$1	$5
Gross unrealized gains (pre-tax) on marketable securities	1	1
Percentage of asset-backed securities rated AAA/A-1+, Aaa/P-1, or AAA/F1+	96.60%
Estimated fair value of current plus long term asset backed securities	$538
Number of rating agencies for which asset backed securities must be rated	2
Number of rating agencies for asset backed securities that must be either Moody's or Standard and Poor's	1

Marketable_Securities_current_

Marketable Securities (current and non-current) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Marketable securities classification
Current marketable securities	$626	$756
Non-current marketable securities	828	1,453
Total marketable securities	1,454	2,209
U.S. government agency securities
Marketable securities classification
Current marketable securities	67	103
Non-current marketable securities	41	131
Foreign government agency securities
Marketable securities classification
Current marketable securities	75	30
Non-current marketable securities	20	95
Corporate debt securities
Marketable securities classification
Current marketable securities	241	143
Non-current marketable securities	378	638
Commercial paper
Marketable securities classification
Current marketable securities	0	60
Certificates of deposit/time deposits
Marketable securities classification
Current marketable securities	41	20
Non-current marketable securities	0	20
U.S. treasury securities
Marketable securities classification
Non-current marketable securities	38	49
U.S. municipal securities
Marketable securities classification
Current marketable securities	0	2
Non-current marketable securities	15	0
Asset-backed securities
Marketable securities classification
Current marketable securities	202	398
Non-current marketable securities	336	509
Asset-backed securities Automobile loan related
Marketable securities classification
Current marketable securities	122	287
Non-current marketable securities	160	298
Asset-backed securities Credit card related
Marketable securities classification
Current marketable securities	59	52
Non-current marketable securities	103	128
Asset-backed securities Equipment lease related
Marketable securities classification
Current marketable securities	21	30
Non-current marketable securities	27	37
Asset-backed securities Other asset-backed securities
Marketable securities classification
Current marketable securities	0	29
Non-current marketable securities	46	46
Auction rate securities
Marketable securities classification
Non-current marketable securities	$0	$11

Marketable_Securities_Contract

Marketable Securities (Contractual maturity) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Marketable securities by contractual maturity
Due in one year or less	$367
Due after one year through five years	1,064
Due after five years through ten years	8
Due after ten years	15
Total marketable securities	$1,454	$2,209

LongTerm_Debt_and_ShortTerm_Bo2

Long-Term Debt and Short-Term Borrowings (Details)

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Jun. 30, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2004

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Jul. 31, 2007

Dec. 31, 2013

Dec. 31, 2007

Dec. 31, 2014

Nov. 30, 2013

USD ($)

USD ($)

Current portion of long-term debt

Current portion of long-term debt

Commercial paper

Commercial paper

Other borrowings

Other borrowings

Fixed-rate debt

Fixed-rate debt

Floating-rate debt

Floating-rate debt

Fixed rate Eurobond which matured in July 2014

Fixed rate Eurobond which matured in July 2014

Fixed rate Eurobond which matured in July 2014

Floating rate Eurobond which matured in July 2014

Floating rate Eurobond which matured in July 2014

Floating rate Eurobond which matured in July 2014

Fixed rate Medium term note due 2016

Fixed rate Medium term note due 2016

Fixed rate Euro Medium term note due 2026

Fixed rate Euro Medium term note due 2026

Fixed rate Euro Medium term note due 2026

Fixed rate Eurobond Due 2021

Fixed rate Eurobond Due 2021

Fixed rate Eurobond Due 2021

Floating rate Eurobond Due 2021

Floating rate Eurobond Due 2021

Floating rate Eurobond Due 2021

Fixed rate 30-year bond due 2037

Fixed rate 30-year bond due 2037

Fixed rate medium term note due 2017

Fixed rate medium term note due 2017

Fixed rate medium term note due 2019

Fixed rate medium term note due 2019

Fixed rate medium term note due 2019

Floating rate medium term note due 2019

Floating rate medium term note due 2019

Floating rate Euro Medium term note due 2018

Floating rate Euro Medium term note due 2018

Floating rate Euro Medium term note due 2018

Fixed rate medium term note due 2022

Fixed rate medium term note due 2022

Fixed rate 30-year debenture due 2028

Fixed rate 30-year debenture due 2028

Fixed rate medium term note due 2044

Fixed rate medium term note due 2044

Floating Rate UK Borrowing repaid December 2014

Floating Rate UK Borrowing repaid December 2014

Floating Rate UK Borrowing repaid December 2014

Floating rate note due 2041

Floating rate note due 2041

Floating rate note due 2044

Floating rate note due 2044

Floating rate note due 2044

Various fixed and floating rate Other borrowings due 2015-2040

Various fixed and floating rate Other borrowings due 2015-2040

Eurobond 750 Million Euros Issued July 2007

Eurobond 750 Million Euros Issued July 2007

Eurobond 275 Million Euros Issued December 2007

Eurobond 275 Million Euros Issued December 2007

Eurobond 600 Million Euros Issued November 2013

Eurobond 600 Million Euros Issued November 2013

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

EUR (€)

USD ($)

EUR (€)

Long-Term Debt

Principal amount

€ 775,000,000

€ 250,000,000

$1,000,000,000

€ 750,000,000

€ 300,000,000

€ 300,000,000

$750,000,000

$650,000,000

$600,000,000

$625,000,000

$25,000,000

€ 500,000,000

$600,000,000

$330,000,000

$325,000,000

£ 66,000,000

$96,000,000

$55,000,000

$60,000,000

$1,042,000,000

€ 750,000,000

$382,000,000

€ 275,000,000

$753,000,000

€ 600,000,000

Interest rate - effective

2.46%

2.74%

3.19%

0.53%

0.48%

1.62%

1.71%

1.71%

1.97%

1.97%

0.40%

0.40%

5.73%

1.10%

0.28%

1.74%

0.31%

0.31%

2.17%

6.01%

4.05%

4.17%

Total long-term debt

55,000,000

1,586,000,000

4,933,000,000

4,821,000,000

1,853,000,000

1,091,000,000

0

1,075,000,000

0

349,000,000

997,000,000

995,000,000

897,000,000

0

363,000,000

411,000,000

390,000,000

404,000,000

748,000,000

748,000,000

649,000,000

648,000,000

594,000,000

0

25,000,000

0

608,000,000

0

593,000,000

592,000,000

344,000,000

346,000,000

315,000,000

0

0

109,000,000

96,000,000

97,000,000

55,000,000

59,000,000

112,000,000

79,000,000

Long-term debt - excluding current portion - carrying value

6,731,000,000

4,326,000,000

Short-Term Borrowings and Current Portion of Long-Term Debt

Total short-term borrowings and current portion of long-term debt

106,000,000

1,683,000,000

0

0

51,000,000

97,000,000

Maturities of long-term debt

2015

55,000,000

2016

1,109,000,000

2017

745,000,000

2018

608,000,000

2019

622,000,000

After 2019

3,647,000,000

Floating rate note payments due in 2015

55,000,000

Floating rate note payments due in 2016

71,000,000

Floating rate note payments due in 2017

$96,000,000

LongTerm_Debt_and_ShortTerm_Bo3

Long-Term Debt and Short-Term Borrowings (Details 1)

31-May-14

Sep. 30, 2011

Jul. 31, 2007

Dec. 31, 2013

Aug. 31, 2010

Jul. 31, 2007

Dec. 31, 2007

Dec. 31, 2013

Nov. 30, 2013

Dec. 31, 2014

Sep. 30, 2011

Dec. 31, 2014

Jun. 30, 2012

Dec. 31, 2014

Jun. 30, 2014

Dec. 31, 2014

Nov. 30, 2014

Dec. 31, 2014

Nov. 30, 2014

Dec. 31, 2014

Jun. 30, 2012

Dec. 31, 2014

Jun. 30, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Mar. 31, 2007

Dec. 31, 2014

Dec. 31, 1998

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2004

Dec. 31, 2014

Aug. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2014

Mar. 31, 2014

Medium-term notes program

Medium-term notes program

Eurobond 750 Million Euros Issued July 2007

Eurobond 750 Million Euros Issued July 2007

Eurobond 750 Million Euros Issued July 2007

Eurobond 750 Million Euros Issued July 2007

Eurobond 275 Million Euros Issued December 2007

Eurobond 275 Million Euros Issued December 2007

Eurobond 600 Million Euros Issued November 2013

Eurobond 600 Million Euros Issued November 2013

Fixed rate Medium term note due 2016

Fixed rate Medium term note due 2016

Fixed rate medium term note due 2017

Fixed rate medium term note due 2017

Fixed rate medium term note due 2019

Fixed rate medium term note due 2019

Floating rate Euro Medium term note due 2018

Floating rate Euro Medium term note due 2018

Fixed rate Euro Medium term note due 2026

Fixed rate Euro Medium term note due 2026

Fixed rate medium term note due 2022

Fixed rate medium term note due 2022

Fixed rate medium term note due 2044

Fixed rate medium term note due 2044

Floating rate notes due in 2027, 2040 and 2041

Floating rate notes due in 2027, 2040 and 2041

Floating rate notes due in 2027, 2040 and 2041

Fixed rate 30-year bond due 2037

Fixed rate 30-year bond due 2037

Fixed rate 30-year debenture due 2028

Fixed rate 30-year debenture due 2028

Eurobond notes which matured in 2014

Fixed rate Eurobond Due 2021

Floating rate Eurobond Due 2021

Floating rate note due 2044

Floating rate note due 2044

Five-year credit facility agreement

Five-year credit facility agreement

Stand alone letters of credit

Bank guarantees issued and outstanding

Three-year credit facility agreement with JP Morgan Chase Bank

Three-year credit facility agreement with JP Morgan Chase Bank

Three-year credit facility agreement with JP Morgan Chase Bank

Three-year credit facility agreement with JP Morgan Chase Bank

USD ($)

USD ($)

EUR (€)

USD ($)

Interest rate swap contracts

Interest rate swap contracts

EUR (€)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

EUR (€)

USD ($)

USD ($)

Maximum

Minimum

USD ($)

USD ($)

EUR (€)

EUR (€)

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

GBP (£)

GBP (£)

GBP (£)

EUR (€)

EUR (€)

Long-Term Debt

Term of debt instrument

7 years

7 years

8 years

5 years

5 years

5 years

4 years

12 years

10 years

30 years

30 years

30 years

40 years

Medium-term notes program established in connection with a "well-known seasoned issuer" shelf registration

$9,000,000,000

$3,000,000,000

Principal amount

750,000,000

1,042,000,000

275,000,000

382,000,000

600,000,000

753,000,000

1,000,000,000

650,000,000

625,000,000

600,000,000

500,000,000

750,000,000

600,000,000

325,000,000

750,000,000

330,000,000

1,025,000,000

300,000,000

300,000,000

60,000,000

55,000,000

Amount of notes under medium term note program that were previously issued

2,250,000,000

Interest rate, stated percentage (as a percent)

5.00%

5.00%

1.88%

1.38%

1.00%

1.63%

1.50%

2.00%

3.88%

5.70%

6.01%

Repurchase price of floating rate notes (as a percent)

100.00%

99.00%

100.00%

Derivative notional amount

400,000,000

300,000,000

600,000,000

Termination of notional amount of fixed-to-floating interest rate swap

150,000,000

Notional amount remaining after partial termination of fixed-to-floating interest rate swap

250,000,000

Number of years after date of issuance that put options commence

10 years

Number of years after put options commence when additional put options occur on each anniversary thereafter until final maturity

3 years

Line of Credit Facility

Term of credit facility

5 years

3 years

3 years

Credit facility amount prior to new agreement

1,500,000,000

Current borrowing capacity

2,250,000,000

106,000,000

66,000,000

Maximum increase available subject to lender approval

2,250,000,000

Maximum borrowing capacity including portion subject to lender approval

4,500,000,000

Amount of letters of credit outstanding utilized in connection with normal business activities

219,000,000

Repayment of Lines of Credit

$18,000,000

£ 30,000,000

£ 36,000,000

Required minimum EBITDA to Interest Ratio

3

Actual EBITDA to Interest Ratio

60

Number of consecutive quarters over which the ratio of required EBITDA to Interest Ratio is calculated

4

Pension_and_Postretirement_Ben2

Pension and Postretirement Benefit Plans (Narratives) (Details) (USD $)	3 Months Ended			12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2011
			Participants			LimitedPartner
Benefit Plan Information
Special termination benefits - number of additional years of pension service			1 year
Special termination benefits - number of additional years of age for certain benefit calculations			1 year
Special termination benefits - number of participants			616
Special termination benefits charge			$26
Projected benefit obligation (PBO) term vested 2014 liability reduction estimate	266	270
Pension benefit obligation (PBO) term vested liability reduction as percent of term vested eligible		34.00%
Pension benefit obligation (PBO) term vested liability reduction as percent of overall U.S. pension PBO liability		2.00%
Pension expense impact to income statement in 2014 from Lump Sum Payout		0
Number of additional limited partners of WG Trading Company, in addition to 3M, who objected and appealed the court's order to the United States Court of Appeals for the Second Circuit						6
Percentage of WG Trading Company holdings in relation to total fair value of the company's total plan assets, high end of range (as a percent)	1.00%			1.00%
Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions year to date				210	476
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions year to date				45	53
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions year to date				165	423
Postretirement Benefits
Benefit Plan Information
Company contributions year to date				$5	$6

Pension_and_Postretirement_Ben3

Pension and Postretirement Benefit Plans (Narratives) (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Benefit Plan Information
Maximum amount of certain nonqualified unfunded pension and postretirement benefit plans obligations not included in benefit obligation reconciliation	$30	$30
Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company-sponsored retirement plans, minimum number of worldwide plans	80
Company-sponsored retirement plans, number of countries	28
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Percentage of funding target for defined benefit pension plans, of the target liability by 2011	100.00%
United States Qualified and Non-qualified Pension Benefits | Long/short equity
Benefit Plan Information
Reclassification of pension assets from Level 3 to Level 2		67
United States Qualified and Non-qualified Pension Benefits | Absolute return
Benefit Plan Information
Reclassification of pension assets from Level 3 to Level 2		$100
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company-sponsored retirement plans, minimum number of international plans	70
Company-sponsored retirement plans, number of countries	27

Pension_and_Postretirement_Ben4

Pension and Postretirement Benefit Plans (Narratives) (Details 2) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S. Defined Contribution Plan
Schedule Of Defined Contribution Plans Disclosures
Company match of eligible compensation, high end of range	6.00%
Company match of eligible compensation, percent for employees hired on or after January 1, 2009	100.00%
Company contribution to employer retirement income account for employees hired on or after January 1, 2009	3.00%
Expenses related to defined contribution plans	$153	$136	$124
U.S. Defined Contribution Plan | Maximum
Schedule Of Defined Contribution Plans Disclosures
Employer match of employee contributions, pre January 1, 2009	75.00%
U.S. Defined Contribution Plan | Minimum
Schedule Of Defined Contribution Plans Disclosures
Employer match of employee contributions, pre January 1, 2009	60.00%
Foreign Defined Contribution Plan
Schedule Of Defined Contribution Plans Disclosures
Expenses related to defined contribution plans	$75	$71	$58

Pension_and_Postretirement_Ben5

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	$46	$577
Accrued benefit cost
Current liabilities	-60	-61
Non-current liabilities	-3,843	-1,794
Qualified and Non-qualified Pension Benefits
Change in plan assets
Company contributions	210	476
United States Qualified and Non-qualified Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	13,967	14,830
Acquisitions	0	15
Service cost	241	258	254
Interest cost	676	598	587
Participant contributions	0	0
Foreign exchange rate changes	0	0
Plan amendments	-266	0
Actuarial (gain) loss	2,874	-986
Medicare Part D Reimbursement	0	0
Benefit payments	-1,039	-747
Settlements, curtailments, special termination benefits and other	-1	-1
Benefit obligation at end of year	16,452	13,967	14,830
Change in plan assets
Fair value, beginning balance	13,889	13,781
Actual return on plan assets	1,749	803
Company contributions	45	53
Participant contributions	0	0
Foreign exchange rate changes	0	0
Benefit payments	-1,039	-747
Settlements, curtailments, special termination benefits and other	-1	-1
Fair value, ending balance	14,643	13,889	13,781
Funded status at end of year	-1,809	-78
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	3	399
Accrued benefit cost
Current liabilities	-46	-47
Non-current liabilities	-1,766	-430
Ending balance	-1,809	-78
Amounts recognized in accumulated other comprehensive income
Net transition obligation (asset)	0	0
Net actuarial loss (gain)	5,462	3,537
Prior service cost (credit)	-251	20
Ending balance	5,211	3,557
Accumulated benefit obligations in excess of plan assets
Projected benefit obligation	16,435	486
Accumulated benefit obligation	15,319	463
Fair value of plan assets	14,623	9
Total Accumulated Benefit Obligation	15,335	13,357
International Qualified and Non-qualified Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	6,346	6,414
Acquisitions	0	0
Service cost	141	147	124
Interest cost	252	238	247
Participant contributions	10	8
Foreign exchange rate changes	-663	-79
Plan amendments	3	3
Actuarial (gain) loss	1,128	-163
Medicare Part D Reimbursement	0	0
Benefit payments	-235	-222
Settlements, curtailments, special termination benefits and other	-3	0
Benefit obligation at end of year	6,979	6,346	6,414
Change in plan assets
Fair value, beginning balance	5,758	5,222
Actual return on plan assets	813	421
Company contributions	165	423
Participant contributions	10	8
Foreign exchange rate changes	-554	-94
Benefit payments	-235	-222
Settlements, curtailments, special termination benefits and other	0	0
Fair value, ending balance	5,957	5,758	5,222
Funded status at end of year	-1,022	-588
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	43	178
Accrued benefit cost
Current liabilities	-10	-10
Non-current liabilities	-1,055	-756
Ending balance	-1,022	-588
Amounts recognized in accumulated other comprehensive income
Net transition obligation (asset)	-3	-4
Net actuarial loss (gain)	2,200	1,949
Prior service cost (credit)	-93	-117
Ending balance	2,104	1,828
Accumulated benefit obligations in excess of plan assets
Projected benefit obligation	2,588	2,198
Accumulated benefit obligation	2,335	1,960
Fair value of plan assets	1,636	1,547
Total Accumulated Benefit Obligation	6,401	5,825
Postretirement Benefits
Change in benefit obligation
Benefit obligation at beginning of year	2,017	2,205
Acquisitions	0	0
Service cost	65	80	78
Interest cost	97	88	86
Participant contributions	18	30
Foreign exchange rate changes	-11	-13
Plan amendments	0	-20
Actuarial (gain) loss	415	-225
Medicare Part D Reimbursement	1	2
Benefit payments	-140	-130
Settlements, curtailments, special termination benefits and other	0	0
Benefit obligation at end of year	2,462	2,017	2,205
Change in plan assets
Fair value, beginning balance	1,405	1,321
Actual return on plan assets	148	178
Company contributions	5	6
Participant contributions	18	30
Foreign exchange rate changes	0	0
Benefit payments	-140	-130
Settlements, curtailments, special termination benefits and other	0	0
Fair value, ending balance	1,436	1,405	1,321
Funded status at end of year	-1,026	-612
Amounts recognized in the Consolidated Balance Sheet
Non-current assets	0	0
Accrued benefit cost
Current liabilities	-4	-4
Non-current liabilities	-1,022	-608
Ending balance	-1,026	-612
Amounts recognized in accumulated other comprehensive income
Net transition obligation (asset)	0	0
Net actuarial loss (gain)	914	616
Prior service cost (credit)	-102	-151
Ending balance	$812	$465

Pension_and_Postretirement_Ben6

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 2) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
United States Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	$241	$258	$254
Interest cost	676	598	587
Expected return on plan assets	-1,043	-1,046	-992
Amortization of transition (asset) obligation	0	0	0
Amortization of prior service cost (benefit)	4	5	5
Amortization of net actuarial (gain) loss	243	399	470
Net periodic benefit cost (benefit)	121	214	324
Settlements, curtailments, special termination benefits and other	0	0	26
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	121	214	350
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation	0	0	0
Prior service cost (benefit)	-266	0	0
Amortization of prior service cost (benefit)	-4	-5	-5
Net actuarial (gain) loss	2,167	-743	-470
Amortization of net actuarial (gain) loss	-243	-399	-470
Foreign currency	0	0	0
Total recognized in other comprehensive income (loss)	1,654	-1,147	-945
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	1,775	-933	-595
International Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	141	147	124
Interest cost	252	238	247
Expected return on plan assets	-312	-291	-295
Amortization of transition (asset) obligation	-1	-1	-1
Amortization of prior service cost (benefit)	-16	-16	-17
Amortization of net actuarial (gain) loss	121	153	122
Net periodic benefit cost (benefit)	185	230	180
Settlements, curtailments, special termination benefits and other	4	2	4
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	189	232	184
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation	1	1	1
Prior service cost (benefit)	3	3	-7
Amortization of prior service cost (benefit)	16	16	17
Net actuarial (gain) loss	592	-294	707
Amortization of net actuarial (gain) loss	-121	-153	-122
Foreign currency	-215	-47	24
Total recognized in other comprehensive income (loss)	276	-474	620
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	465	-242	804
Postretirement Benefits
Net periodic benefit cost (benefit)
Service cost	65	80	78
Interest cost	97	88	86
Expected return on plan assets	-90	-90	-84
Amortization of transition (asset) obligation	0	0	0
Amortization of prior service cost (benefit)	-47	-66	-72
Amortization of net actuarial (gain) loss	56	95	108
Net periodic benefit cost (benefit)	81	107	116
Settlements, curtailments, special termination benefits and other	0	0	0
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	81	107	116
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition (asset) obligation	0	0	0
Prior service cost (benefit)	0	-20	0
Amortization of prior service cost (benefit)	47	66	72
Net actuarial (gain) loss	358	-313	-33
Amortization of net actuarial (gain) loss	-56	-95	-108
Foreign currency	-1	-2	-1
Total recognized in other comprehensive income (loss)	348	-364	-70
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	$429	($257)	$46

Pension_and_Postretirement_Ben7

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 3) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Company's assumption for the expected return on plan assets
Maximum percentage of medical inflation absorbed by the company in year	3.00%
Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions	$210	$476
Qualified and Non-qualified Pension Benefits | Maximum
Company's assumption for the expected return on plan assets
Estimated pension contributions for next fiscal year	200
Qualified and Non-qualified Pension Benefits | Minimum
Company's assumption for the expected return on plan assets
Estimated pension contributions for next fiscal year	100
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions	45	53
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of transition (asset) obligation	0
Amortization of prior service cost (benefit)	-24
Amortization of net actuarial (gain) loss	408
Total amortization expected over the next fiscal year	384
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.10%	4.98%	4.14%
Compensation rate increase	4.10%	4.00%	4.00%
Percentage increase (decrease) in discount rate obligation from the prior year	-0.88%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	4.98%	4.14%	4.15%
Expected return on assets	7.75%	8.00%	8.25%
Compensation rate increase	4.00%	4.00%	4.00%
United States Qualified Pension Benefits
Company's assumption for the expected return on plan assets
Expected return on assets for next fiscal year	7.75%
Rate of return on plan assets	13.00%	6.00%	13.60%
Average annual actual return on plan assets over the past 10 years	8.70%
Average annual actual return on plan assets over the past 25 years	10.00%
United States Qualified Pension Benefits | Global equities
Asset Allocation assumption
Asset allocation assumption for next fiscal year	26.00%
Company's assumption for the expected return on plan assets
Expected return on assets for next fiscal year	7.00%
United States Qualified Pension Benefits | Private equities
Asset Allocation assumption
Asset allocation assumption for next fiscal year	17.00%
Company's assumption for the expected return on plan assets
Expected return on assets for next fiscal year	12.00%
United States Qualified Pension Benefits | Fixed income securities
Asset Allocation assumption
Asset allocation assumption for next fiscal year	44.00%
Company's assumption for the expected return on plan assets
Expected return on assets for next fiscal year	4.50%
United States Qualified Pension Benefits | Absolute return investments
Asset Allocation assumption
Asset allocation assumption for next fiscal year	13.00%
Company's assumption for the expected return on plan assets
Expected return on assets for next fiscal year	6.75%
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Company contributions	165	423
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of transition (asset) obligation	-1
Amortization of prior service cost (benefit)	-15
Amortization of net actuarial (gain) loss	154
Total amortization expected over the next fiscal year	138
Weighted-average assumptions used to determine benefit obligations
Discount rate	3.11%	4.02%	3.78%
Compensation rate increase	3.33%	3.35%	3.31%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	4.02%	3.78%	4.58%
Expected return on assets	5.83%	5.87%	6.38%
Compensation rate increase	3.35%	3.31%	3.52%
Postretirement Benefits
Benefit Plan Information
Company contributions	5	6
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of transition (asset) obligation	0
Amortization of prior service cost (benefit)	-33
Amortization of net actuarial (gain) loss	77
Total amortization expected over the next fiscal year	$44
Weighted-average assumptions used to determine benefit obligations
Discount rate	4.07%	4.83%	4.00%
Percentage increase (decrease) in discount rate obligation from the prior year	-0.76%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	4.83%	4.00%	4.04%
Expected return on assets	7.11%	7.19%	7.30%

Pension_and_Postretirement_Ben8

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 4) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
United States Qualified and Non-qualified Pension Benefits
Future Pension and Postretirement Benefit Payments
2015 Benefit Payments	$946
2016 Benefit Payments	964
2017 Benefit Payments	983
2018 Benefit Payments	1,010
2019 Benefit Payments	1,037
Following five years	5,381
International Qualified and Non-qualified Pension Benefits
Future Pension and Postretirement Benefit Payments
2015 Benefit Payments	209
2016 Benefit Payments	226
2017 Benefit Payments	237
2018 Benefit Payments	256
2019 Benefit Payments	273
Following five years	1,563
Postretirement Benefits
Future Pension and Postretirement Benefit Payments
2015 Benefit Payments	127
2016 Benefit Payments	139
2017 Benefit Payments	156
2018 Benefit Payments	160
2019 Benefit Payments	162
Following five years	$860

Pension_and_Postretirement_Ben9

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 5) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
United States Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Total, before other items to reconcile	$14,818	$13,895
Other items to reconcile to fair value of plan assets	-175	-6
Fair value of plan assets	14,643	13,889	13,781
United States Qualified and Non-qualified Pension Benefits | Level 1
Benefit Plan Information
Total, before other items to reconcile	4,367	4,182
United States Qualified and Non-qualified Pension Benefits | Level 2
Benefit Plan Information
Total, before other items to reconcile	6,574	6,229
United States Qualified and Non-qualified Pension Benefits | Level 3
Benefit Plan Information
Total, before other items to reconcile	3,877	3,484	3,531
United States Qualified and Non-qualified Pension Benefits | Equities
Benefit Plan Information
Total, before other items to reconcile	3,587	3,538
United States Qualified and Non-qualified Pension Benefits | Equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	2,980	2,919
United States Qualified and Non-qualified Pension Benefits | Equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	223	222
United States Qualified and Non-qualified Pension Benefits | Equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	384	397	421
United States Qualified and Non-qualified Pension Benefits | U.S. equities
Benefit Plan Information
Total, before other items to reconcile	1,769	1,601
United States Qualified and Non-qualified Pension Benefits | U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,766	1,595
United States Qualified and Non-qualified Pension Benefits | U.S. equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	3	3
United States Qualified and Non-qualified Pension Benefits | U.S. equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	3
United States Qualified and Non-qualified Pension Benefits | Non-U.S. equities
Benefit Plan Information
Total, before other items to reconcile	1,215	1,325
United States Qualified and Non-qualified Pension Benefits | Non-U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,214	1,324
United States Qualified and Non-qualified Pension Benefits | Non-U.S. equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	1	1
United States Qualified and Non-qualified Pension Benefits | Non-U.S. equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Index funds
Benefit Plan Information
Total, before other items to reconcile	150	152
United States Qualified and Non-qualified Pension Benefits | Index funds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Index funds | Level 2
Benefit Plan Information
Total, before other items to reconcile	148	151
United States Qualified and Non-qualified Pension Benefits | Index funds | Level 3
Benefit Plan Information
Total, before other items to reconcile	2	1
United States Qualified and Non-qualified Pension Benefits | Long/short equity
Benefit Plan Information
Total, before other items to reconcile	453	460
United States Qualified and Non-qualified Pension Benefits | Long/short equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Long/short equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	71	67
United States Qualified and Non-qualified Pension Benefits | Long/short equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	382	393
United States Qualified and Non-qualified Pension Benefits | Fixed income
Benefit Plan Information
Total, before other items to reconcile	5,652	4,670
United States Qualified and Non-qualified Pension Benefits | Fixed income | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,059	941
United States Qualified and Non-qualified Pension Benefits | Fixed income | Level 2
Benefit Plan Information
Total, before other items to reconcile	4,593	3,727
United States Qualified and Non-qualified Pension Benefits | Fixed income | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	2	2
United States Qualified and Non-qualified Pension Benefits | U.S. government securities
Benefit Plan Information
Total, before other items to reconcile	1,622	1,509
United States Qualified and Non-qualified Pension Benefits | U.S. government securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,032	908
United States Qualified and Non-qualified Pension Benefits | U.S. government securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	590	601
United States Qualified and Non-qualified Pension Benefits | U.S. government securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities
Benefit Plan Information
Total, before other items to reconcile	3	4
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	3	0
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	4
United States Qualified and Non-qualified Pension Benefits | Preferred and convertible securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	2,558	2,060
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds | Level 1
Benefit Plan Information
Total, before other items to reconcile	8	14
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	2,550	2,046
United States Qualified and Non-qualified Pension Benefits | U.S. corporate bonds | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Non-U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	478	412
United States Qualified and Non-qualified Pension Benefits | Non-U.S. corporate bonds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Non-U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	478	412
United States Qualified and Non-qualified Pension Benefits | Non-U.S. corporate bonds | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Non-U.S. government securities
Benefit Plan Information
Total, before other items to reconcile	388	336
United States Qualified and Non-qualified Pension Benefits | Non-U.S. government securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	7	20
United States Qualified and Non-qualified Pension Benefits | Non-U.S. government securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	381	316
United States Qualified and Non-qualified Pension Benefits | Non-U.S. government securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Asset-backed securities
Benefit Plan Information
Total, before other items to reconcile	20	26
United States Qualified and Non-qualified Pension Benefits | Asset-backed securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Asset-backed securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	20	26
United States Qualified and Non-qualified Pension Benefits | Asset-backed securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Collateralized mortgage obligations
Benefit Plan Information
Total, before other items to reconcile	29	28
United States Qualified and Non-qualified Pension Benefits | Collateralized mortgage obligations | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Collateralized mortgage obligations | Level 2
Benefit Plan Information
Total, before other items to reconcile	29	28
United States Qualified and Non-qualified Pension Benefits | Collateralized mortgage obligations | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Other securities
Benefit Plan Information
Total, before other items to reconcile	31	37
United States Qualified and Non-qualified Pension Benefits | Other securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Other securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	31	37
United States Qualified and Non-qualified Pension Benefits | Other securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Private placements
Benefit Plan Information
Total, before other items to reconcile	391	253
United States Qualified and Non-qualified Pension Benefits | Private placements | Level 1
Benefit Plan Information
Total, before other items to reconcile	3	0
United States Qualified and Non-qualified Pension Benefits | Private placements | Level 2
Benefit Plan Information
Total, before other items to reconcile	388	251
United States Qualified and Non-qualified Pension Benefits | Private placements | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	2
United States Qualified and Non-qualified Pension Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	132	5
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 1
Benefit Plan Information
Total, before other items to reconcile	6	-1
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 2
Benefit Plan Information
Total, before other items to reconcile	126	6
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Private equity
Benefit Plan Information
Total, before other items to reconcile	2,502	2,448
United States Qualified and Non-qualified Pension Benefits | Private equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	15	21
United States Qualified and Non-qualified Pension Benefits | Private equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Private equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	2,487	2,427	2,136
United States Qualified and Non-qualified Pension Benefits | Buyouts
Benefit Plan Information
Total, before other items to reconcile	700	737
United States Qualified and Non-qualified Pension Benefits | Buyouts | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Buyouts | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Buyouts | Level 3
Benefit Plan Information
Total, before other items to reconcile	700	737
United States Qualified and Non-qualified Pension Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	-74	-97
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Derivative instruments | Level 3
Benefit Plan Information
Total, before other items to reconcile	-74	-97
United States Qualified and Non-qualified Pension Benefits | Direct investments
Benefit Plan Information
Total, before other items to reconcile	516	467
United States Qualified and Non-qualified Pension Benefits | Direct investments | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Direct investments | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Direct investments | Level 3
Benefit Plan Information
Total, before other items to reconcile	516	467
United States Qualified and Non-qualified Pension Benefits | Distressed debt
Benefit Plan Information
Total, before other items to reconcile	202	211
United States Qualified and Non-qualified Pension Benefits | Distressed debt | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Distressed debt | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Distressed debt | Level 3
Benefit Plan Information
Total, before other items to reconcile	202	211
United States Qualified and Non-qualified Pension Benefits | Growth equity
Benefit Plan Information
Total, before other items to reconcile	198	191
United States Qualified and Non-qualified Pension Benefits | Growth equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	15	21
United States Qualified and Non-qualified Pension Benefits | Growth equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Growth equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	183	170
United States Qualified and Non-qualified Pension Benefits | Mezzanine
Benefit Plan Information
Total, before other items to reconcile	116	83
United States Qualified and Non-qualified Pension Benefits | Mezzanine | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Mezzanine | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Mezzanine | Level 3
Benefit Plan Information
Total, before other items to reconcile	116	83
United States Qualified and Non-qualified Pension Benefits | Real estate
Benefit Plan Information
Total, before other items to reconcile	147	156
United States Qualified and Non-qualified Pension Benefits | Real estate | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Real estate | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Real estate | Level 3
Benefit Plan Information
Total, before other items to reconcile	147	156
United States Qualified and Non-qualified Pension Benefits | Secondary
Benefit Plan Information
Total, before other items to reconcile	145	152
United States Qualified and Non-qualified Pension Benefits | Secondary | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Secondary | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Secondary | Level 3
Benefit Plan Information
Total, before other items to reconcile	145	152
United States Qualified and Non-qualified Pension Benefits | Venture capital
Benefit Plan Information
Total, before other items to reconcile	552	548
United States Qualified and Non-qualified Pension Benefits | Venture capital | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Venture capital | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Venture capital | Level 3
Benefit Plan Information
Total, before other items to reconcile	552	548
United States Qualified and Non-qualified Pension Benefits | Absolute return
Benefit Plan Information
Total, before other items to reconcile	2,173	1,833
United States Qualified and Non-qualified Pension Benefits | Absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	26	0
United States Qualified and Non-qualified Pension Benefits | Absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	1,141	1,175
United States Qualified and Non-qualified Pension Benefits | Absolute return | Level 3
Benefit Plan Information
Total, before other items to reconcile	1,006	658	865
United States Qualified and Non-qualified Pension Benefits | Commodities
Benefit Plan Information
Total, before other items to reconcile	0	88
United States Qualified and Non-qualified Pension Benefits | Commodities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
United States Qualified and Non-qualified Pension Benefits | Commodities | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	88
United States Qualified and Non-qualified Pension Benefits | Commodities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0	107
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents
Benefit Plan Information
Total, before other items to reconcile	904	1,318
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents | Level 1
Benefit Plan Information
Total, before other items to reconcile	287	301
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents | Level 2
Benefit Plan Information
Total, before other items to reconcile	617	1,017
United States Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits
Benefit Plan Information
Total, before other items to reconcile	5,998	5,757
Other items to reconcile to fair value of plan assets	-41	1
Fair value of plan assets	5,957	5,758	5,222
International Qualified and Non-qualified Pension Benefits | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,583	1,750
International Qualified and Non-qualified Pension Benefits | Level 2
Benefit Plan Information
Total, before other items to reconcile	3,813	3,340
International Qualified and Non-qualified Pension Benefits | Level 3
Benefit Plan Information
Total, before other items to reconcile	602	667	597
International Qualified and Non-qualified Pension Benefits | Equities
Benefit Plan Information
Total, before other items to reconcile	2,131	2,282
International Qualified and Non-qualified Pension Benefits | Equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1,286	1,405
International Qualified and Non-qualified Pension Benefits | Equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	841	872
International Qualified and Non-qualified Pension Benefits | Equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	5	5
International Qualified and Non-qualified Pension Benefits | Growth equities
Benefit Plan Information
Total, before other items to reconcile	848	923
International Qualified and Non-qualified Pension Benefits | Growth equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	672	733
International Qualified and Non-qualified Pension Benefits | Growth equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	176	190
International Qualified and Non-qualified Pension Benefits | Growth equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Value equities
Benefit Plan Information
Total, before other items to reconcile	618	667
International Qualified and Non-qualified Pension Benefits | Value equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	595	653
International Qualified and Non-qualified Pension Benefits | Value equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	23	14
International Qualified and Non-qualified Pension Benefits | Value equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Core equities
Benefit Plan Information
Total, before other items to reconcile	665	692
International Qualified and Non-qualified Pension Benefits | Core equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	19	19
International Qualified and Non-qualified Pension Benefits | Core equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	642	668
International Qualified and Non-qualified Pension Benefits | Core equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	5
International Qualified and Non-qualified Pension Benefits | Fixed income
Benefit Plan Information
Total, before other items to reconcile	2,915	2,565
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 1
Benefit Plan Information
Total, before other items to reconcile	133	228
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 2
Benefit Plan Information
Total, before other items to reconcile	2,763	2,300
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 3
Benefit Plan Information
Total, before other items to reconcile	19	37	36
International Qualified and Non-qualified Pension Benefits | Domestic government debt
Benefit Plan Information
Total, before other items to reconcile	632	741
International Qualified and Non-qualified Pension Benefits | Domestic government debt | Level 1
Benefit Plan Information
Total, before other items to reconcile	87	199
International Qualified and Non-qualified Pension Benefits | Domestic government debt | Level 2
Benefit Plan Information
Total, before other items to reconcile	542	539
International Qualified and Non-qualified Pension Benefits | Domestic government debt | Level 3
Benefit Plan Information
Total, before other items to reconcile	3	3
International Qualified and Non-qualified Pension Benefits | Foreign government debt
Benefit Plan Information
Total, before other items to reconcile	861	686
International Qualified and Non-qualified Pension Benefits | Foreign government debt | Level 1
Benefit Plan Information
Total, before other items to reconcile	45	28
International Qualified and Non-qualified Pension Benefits | Foreign government debt | Level 2
Benefit Plan Information
Total, before other items to reconcile	816	657
International Qualified and Non-qualified Pension Benefits | Foreign government debt | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	1
International Qualified and Non-qualified Pension Benefits | Corporate debt securities
Benefit Plan Information
Total, before other items to reconcile	621	659
International Qualified and Non-qualified Pension Benefits | Corporate debt securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	1
International Qualified and Non-qualified Pension Benefits | Corporate debt securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	615	638
International Qualified and Non-qualified Pension Benefits | Corporate debt securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	5	20
International Qualified and Non-qualified Pension Benefits | Mortgage backed debt
Benefit Plan Information
Total, before other items to reconcile	82	75
International Qualified and Non-qualified Pension Benefits | Mortgage backed debt | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Mortgage backed debt | Level 2
Benefit Plan Information
Total, before other items to reconcile	82	75
International Qualified and Non-qualified Pension Benefits | Mortgage backed debt | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Other - debt obligations
Benefit Plan Information
Total, before other items to reconcile	719	404
International Qualified and Non-qualified Pension Benefits | Other - debt obligations | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Other - debt obligations | Level 2
Benefit Plan Information
Total, before other items to reconcile	708	391
International Qualified and Non-qualified Pension Benefits | Other - debt obligations | Level 3
Benefit Plan Information
Total, before other items to reconcile	11	13
International Qualified and Non-qualified Pension Benefits | Private equity
Benefit Plan Information
Total, before other items to reconcile	154	165
International Qualified and Non-qualified Pension Benefits | Private equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	3	3
International Qualified and Non-qualified Pension Benefits | Private equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	73	87
International Qualified and Non-qualified Pension Benefits | Private equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	78	75	71
International Qualified and Non-qualified Pension Benefits | Private equity funds
Benefit Plan Information
Total, before other items to reconcile	23	22
International Qualified and Non-qualified Pension Benefits | Private equity funds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Private equity funds | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Private equity funds | Level 3
Benefit Plan Information
Total, before other items to reconcile	23	22
International Qualified and Non-qualified Pension Benefits | Real estate
Benefit Plan Information
Total, before other items to reconcile	131	143
International Qualified and Non-qualified Pension Benefits | Real estate | Level 1
Benefit Plan Information
Total, before other items to reconcile	3	3
International Qualified and Non-qualified Pension Benefits | Real estate | Level 2
Benefit Plan Information
Total, before other items to reconcile	73	87
International Qualified and Non-qualified Pension Benefits | Real estate | Level 3
Benefit Plan Information
Total, before other items to reconcile	55	53
International Qualified and Non-qualified Pension Benefits | Absolute return
Benefit Plan Information
Total, before other items to reconcile	605	619
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	2
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	104	67
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 3
Benefit Plan Information
Total, before other items to reconcile	501	550	485
International Qualified and Non-qualified Pension Benefits | Hedge funds
Benefit Plan Information
Total, before other items to reconcile	117	118
International Qualified and Non-qualified Pension Benefits | Hedge funds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Hedge funds | Level 2
Benefit Plan Information
Total, before other items to reconcile	95	62
International Qualified and Non-qualified Pension Benefits | Hedge funds | Level 3
Benefit Plan Information
Total, before other items to reconcile	22	56
International Qualified and Non-qualified Pension Benefits | Insurance
Benefit Plan Information
Total, before other items to reconcile	476	492
International Qualified and Non-qualified Pension Benefits | Insurance | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Insurance | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Insurance | Level 3
Benefit Plan Information
Total, before other items to reconcile	476	492
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return
Benefit Plan Information
Total, before other items to reconcile	-4	5
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	2
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	-4	3
International Qualified and Non-qualified Pension Benefits | Derivatives - absolute return | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Other - absolute return
Benefit Plan Information
Total, before other items to reconcile	16	4
International Qualified and Non-qualified Pension Benefits | Other - absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
International Qualified and Non-qualified Pension Benefits | Other - absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	13	2
International Qualified and Non-qualified Pension Benefits | Other - absolute return | Level 3
Benefit Plan Information
Total, before other items to reconcile	3	2
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents
Benefit Plan Information
Total, before other items to reconcile	193	126
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents | Level 1
Benefit Plan Information
Total, before other items to reconcile	161	112
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents | Level 2
Benefit Plan Information
Total, before other items to reconcile	32	14
International Qualified and Non-qualified Pension Benefits | Cash and Cash Equivalents | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits
Benefit Plan Information
Total, before other items to reconcile	1,428	1,394
Other items to reconcile to fair value of plan assets	8	11
Fair value of plan assets	1,436	1,405	1,321
Postretirement Benefits | Level 1
Benefit Plan Information
Total, before other items to reconcile	724	709
Postretirement Benefits | Level 2
Benefit Plan Information
Total, before other items to reconcile	494	482
Postretirement Benefits | Level 3
Benefit Plan Information
Total, before other items to reconcile	210	203	218
Postretirement Benefits | Equities
Benefit Plan Information
Total, before other items to reconcile	676	670
Postretirement Benefits | Equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	621	610
Postretirement Benefits | Equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	41	44
Postretirement Benefits | Equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	14	16	16
Postretirement Benefits | U.S. equities
Benefit Plan Information
Total, before other items to reconcile	565	552
Postretirement Benefits | U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	565	552
Postretirement Benefits | U.S. equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | U.S. equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Non-U.S. equities
Benefit Plan Information
Total, before other items to reconcile	56	58
Postretirement Benefits | Non-U.S. equities | Level 1
Benefit Plan Information
Total, before other items to reconcile	56	58
Postretirement Benefits | Non-U.S. equities | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Non-U.S. equities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Index funds
Benefit Plan Information
Total, before other items to reconcile	38	44
Postretirement Benefits | Index funds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Index funds | Level 2
Benefit Plan Information
Total, before other items to reconcile	38	44
Postretirement Benefits | Index funds | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Long/short equity
Benefit Plan Information
Total, before other items to reconcile	17	16
Postretirement Benefits | Long/short equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Long/short equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	3	0
Postretirement Benefits | Long/short equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	14	16
Postretirement Benefits | Fixed income
Benefit Plan Information
Total, before other items to reconcile	457	427
Postretirement Benefits | Fixed income | Level 1
Benefit Plan Information
Total, before other items to reconcile	68	63
Postretirement Benefits | Fixed income | Level 2
Benefit Plan Information
Total, before other items to reconcile	389	364
Postretirement Benefits | Fixed income | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0	0
Postretirement Benefits | U.S. government securities
Benefit Plan Information
Total, before other items to reconcile	254	264
Postretirement Benefits | U.S. government securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	68	62
Postretirement Benefits | U.S. government securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	186	202
Postretirement Benefits | U.S. government securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	119	96
Postretirement Benefits | U.S. corporate bonds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	119	96
Postretirement Benefits | U.S. corporate bonds | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Non-U.S. corporate bonds
Benefit Plan Information
Total, before other items to reconcile	24	21
Postretirement Benefits | Non-U.S. corporate bonds | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Non-U.S. corporate bonds | Level 2
Benefit Plan Information
Total, before other items to reconcile	24	21
Postretirement Benefits | Non-U.S. corporate bonds | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Non-U.S. government securities
Benefit Plan Information
Total, before other items to reconcile	17	15
Postretirement Benefits | Non-U.S. government securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	1
Postretirement Benefits | Non-U.S. government securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	17	14
Postretirement Benefits | Non-U.S. government securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Asset-backed securities
Benefit Plan Information
Total, before other items to reconcile	7	9
Postretirement Benefits | Asset-backed securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Asset-backed securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	7	9
Postretirement Benefits | Asset-backed securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Collateralized mortgage obligations
Benefit Plan Information
Total, before other items to reconcile	5	5
Postretirement Benefits | Collateralized mortgage obligations | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Collateralized mortgage obligations | Level 2
Benefit Plan Information
Total, before other items to reconcile	5	5
Postretirement Benefits | Collateralized mortgage obligations | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Other securities
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Other securities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Other securities | Level 2
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Other securities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Private placements
Benefit Plan Information
Total, before other items to reconcile	25	16
Postretirement Benefits | Private placements | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Private placements | Level 2
Benefit Plan Information
Total, before other items to reconcile	25	16
Postretirement Benefits | Private placements | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	5	0
Postretirement Benefits | Derivative instruments | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Derivative instruments | Level 2
Benefit Plan Information
Total, before other items to reconcile	5	0
Postretirement Benefits | Derivative instruments | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Private equity
Benefit Plan Information
Total, before other items to reconcile	160	162
Postretirement Benefits | Private equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Private equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Private equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	159	161	170
Postretirement Benefits | Buyouts
Benefit Plan Information
Total, before other items to reconcile	56	58
Postretirement Benefits | Buyouts | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Buyouts | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Buyouts | Level 3
Benefit Plan Information
Total, before other items to reconcile	56	58
Postretirement Benefits | Derivative instruments
Benefit Plan Information
Total, before other items to reconcile	-3	-3
Postretirement Benefits | Derivative instruments | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Derivative instruments | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Derivative instruments | Level 3
Benefit Plan Information
Total, before other items to reconcile	-3	-3
Postretirement Benefits | Direct investments
Benefit Plan Information
Total, before other items to reconcile	19	16
Postretirement Benefits | Direct investments | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Direct investments | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Direct investments | Level 3
Benefit Plan Information
Total, before other items to reconcile	19	16
Postretirement Benefits | Distressed debt
Benefit Plan Information
Total, before other items to reconcile	8	7
Postretirement Benefits | Distressed debt | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Distressed debt | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Distressed debt | Level 3
Benefit Plan Information
Total, before other items to reconcile	8	7
Postretirement Benefits | Growth equity
Benefit Plan Information
Total, before other items to reconcile	8	7
Postretirement Benefits | Growth equity | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	1
Postretirement Benefits | Growth equity | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Growth equity | Level 3
Benefit Plan Information
Total, before other items to reconcile	7	6
Postretirement Benefits | Mezzanine
Benefit Plan Information
Total, before other items to reconcile	4	3
Postretirement Benefits | Mezzanine | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Mezzanine | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Mezzanine | Level 3
Benefit Plan Information
Total, before other items to reconcile	4	3
Postretirement Benefits | Real estate
Benefit Plan Information
Total, before other items to reconcile	5	5
Postretirement Benefits | Real estate | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Real estate | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Real estate | Level 3
Benefit Plan Information
Total, before other items to reconcile	5	5
Postretirement Benefits | Secondary
Benefit Plan Information
Total, before other items to reconcile	5	5
Postretirement Benefits | Secondary | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Secondary | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Secondary | Level 3
Benefit Plan Information
Total, before other items to reconcile	5	5
Postretirement Benefits | Venture capital
Benefit Plan Information
Total, before other items to reconcile	58	64
Postretirement Benefits | Venture capital | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Venture capital | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Venture capital | Level 3
Benefit Plan Information
Total, before other items to reconcile	58	64
Postretirement Benefits | Absolute return
Benefit Plan Information
Total, before other items to reconcile	79	63
Postretirement Benefits | Absolute return | Level 1
Benefit Plan Information
Total, before other items to reconcile	1	0
Postretirement Benefits | Absolute return | Level 2
Benefit Plan Information
Total, before other items to reconcile	41	37
Postretirement Benefits | Absolute return | Level 3
Benefit Plan Information
Total, before other items to reconcile	37	26	28
Postretirement Benefits | Commodities
Benefit Plan Information
Total, before other items to reconcile	0	3
Postretirement Benefits | Commodities | Level 1
Benefit Plan Information
Total, before other items to reconcile	0	0
Postretirement Benefits | Commodities | Level 2
Benefit Plan Information
Total, before other items to reconcile	0	3
Postretirement Benefits | Commodities | Level 3
Benefit Plan Information
Total, before other items to reconcile	0	0	4
Postretirement Benefits | Cash and Cash Equivalents
Benefit Plan Information
Total, before other items to reconcile	56	69
Postretirement Benefits | Cash and Cash Equivalents | Level 1
Benefit Plan Information
Total, before other items to reconcile	33	35
Postretirement Benefits | Cash and Cash Equivalents | Level 2
Benefit Plan Information
Total, before other items to reconcile	23	34
Postretirement Benefits | Cash and Cash Equivalents | Level 3
Benefit Plan Information
Total, before other items to reconcile	$0	$0

Recovered_Sheet1

Pension and Postretirement Benefit Plans (Components of net periodic benefit cost and other information) (Details 6) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
United States Qualified and Non-qualified Pension Benefits
Summary of changes in fair values of assets
Fair value, beginning balance	$13,895
Foreign currency exchange	0	0
Fair value, ending balance	14,818	13,895
United States Qualified and Non-qualified Pension Benefits | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	3,484	3,531
Net transfers into / (out of) level 3	100	-101
Purchases, sales, issuances, and settlements, net	-99	-238
Realized gain (loss)	187	181
Change in unrealized gains/(losses) relating to instruments sold during the period	54	-42
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	151	153
Fair value, ending balance	3,877	3,484
United States Qualified and Non-qualified Pension Benefits | Equities
Summary of changes in fair values of assets
Fair value, ending balance	3,587	3,538
United States Qualified and Non-qualified Pension Benefits | Equities | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	397	421
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	-43	-92
Realized gain (loss)	2	10
Change in unrealized gains/(losses) relating to instruments sold during the period	-12	-5
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	40	63
Fair value, ending balance	384	397
United States Qualified and Non-qualified Pension Benefits | Fixed income
Summary of changes in fair values of assets
Fair value, ending balance	5,652	4,670
United States Qualified and Non-qualified Pension Benefits | Fixed income | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	2	2
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	-1	0
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	0	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	-1	0
Fair value, ending balance	0	2
United States Qualified and Non-qualified Pension Benefits | Private equity
Summary of changes in fair values of assets
Fair value, ending balance	2,502	2,448
United States Qualified and Non-qualified Pension Benefits | Private equity | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	2,427	2,136
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	-260	54
Realized gain (loss)	185	126
Change in unrealized gains/(losses) relating to instruments sold during the period	64	3
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	71	108
Fair value, ending balance	2,487	2,427
United States Qualified and Non-qualified Pension Benefits | Absolute return
Summary of changes in fair values of assets
Fair value, ending balance	2,173	1,833
United States Qualified and Non-qualified Pension Benefits | Absolute return | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	658	865
Net transfers into / (out of) level 3	100	-101
Purchases, sales, issuances, and settlements, net	205	-104
Realized gain (loss)	0	46
Change in unrealized gains/(losses) relating to instruments sold during the period	2	-30
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	41	-18
Fair value, ending balance	1,006	658
United States Qualified and Non-qualified Pension Benefits | Commodities
Summary of changes in fair values of assets
Fair value, ending balance	0	88
United States Qualified and Non-qualified Pension Benefits | Commodities | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	0	107
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	0	-96
Realized gain (loss)	0	-1
Change in unrealized gains/(losses) relating to instruments sold during the period	0	-10
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	0	0
Fair value, ending balance	0	0
International Qualified and Non-qualified Pension Benefits
Summary of changes in fair values of assets
Fair value, beginning balance	5,757
Foreign currency exchange	-554	-94
Fair value, ending balance	5,998	5,757
International Qualified and Non-qualified Pension Benefits | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	667	597
Net transfers into / (out of) level 3	-32	0
Foreign currency exchange	-75	6
Purchases, sales, issuances, and settlements, net	12	49
Realized gain (loss)	2	2
Change in unrealized gains/(losses) relating to instruments sold during the period	-2	1
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	30	12
Fair value, ending balance	602	667
International Qualified and Non-qualified Pension Benefits | Equities
Summary of changes in fair values of assets
Fair value, ending balance	2,131	2,282
International Qualified and Non-qualified Pension Benefits | Equities | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	5	5
Net transfers into / (out of) level 3	0	0
Foreign currency exchange	-1	0
Purchases, sales, issuances, and settlements, net	0	0
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	0	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	0	0
Fair value, ending balance	4	5
International Qualified and Non-qualified Pension Benefits | Fixed income
Summary of changes in fair values of assets
Fair value, ending balance	2,915	2,565
International Qualified and Non-qualified Pension Benefits | Fixed income | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	37	36
Net transfers into / (out of) level 3	0	0
Foreign currency exchange	-4	-2
Purchases, sales, issuances, and settlements, net	-14	-2
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	-1	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	1	5
Fair value, ending balance	19	37
International Qualified and Non-qualified Pension Benefits | Private equity
Summary of changes in fair values of assets
Fair value, ending balance	154	165
International Qualified and Non-qualified Pension Benefits | Private equity | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	75	71
Net transfers into / (out of) level 3	0	0
Foreign currency exchange	-6	-1
Purchases, sales, issuances, and settlements, net	-2	1
Realized gain (loss)	2	2
Change in unrealized gains/(losses) relating to instruments sold during the period	-1	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	10	2
Fair value, ending balance	78	75
International Qualified and Non-qualified Pension Benefits | Absolute return
Summary of changes in fair values of assets
Fair value, ending balance	605	619
International Qualified and Non-qualified Pension Benefits | Absolute return | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	550	485
Net transfers into / (out of) level 3	-32	0
Foreign currency exchange	-64	9
Purchases, sales, issuances, and settlements, net	28	50
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	0	1
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	19	5
Fair value, ending balance	501	550
Postretirement Benefits
Summary of changes in fair values of assets
Fair value, beginning balance	1,394
Foreign currency exchange	0	0
Fair value, ending balance	1,428	1,394
Postretirement Benefits | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	203	218
Net transfers into / (out of) level 3	-2	0
Purchases, sales, issuances, and settlements, net	-39	-38
Realized gain (loss)	29	12
Change in unrealized gains/(losses) relating to instruments sold during the period	-5	-4
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	24	15
Fair value, ending balance	210	203
Postretirement Benefits | Equities
Summary of changes in fair values of assets
Fair value, ending balance	676	670
Postretirement Benefits | Equities | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	16	16
Net transfers into / (out of) level 3	-2	0
Purchases, sales, issuances, and settlements, net	-2	-3
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	0	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	2	3
Fair value, ending balance	14	16
Postretirement Benefits | Fixed income
Summary of changes in fair values of assets
Fair value, ending balance	457	427
Postretirement Benefits | Fixed income | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	0	0
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	0	0
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	0	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	0	0
Fair value, ending balance	0	0
Postretirement Benefits | Private equity
Summary of changes in fair values of assets
Fair value, ending balance	160	162
Postretirement Benefits | Private equity | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	161	170
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	-45	-27
Realized gain (loss)	29	10
Change in unrealized gains/(losses) relating to instruments sold during the period	-5	-3
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	19	11
Fair value, ending balance	159	161
Postretirement Benefits | Absolute return
Summary of changes in fair values of assets
Fair value, ending balance	79	63
Postretirement Benefits | Absolute return | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	26	28
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	8	-4
Realized gain (loss)	0	2
Change in unrealized gains/(losses) relating to instruments sold during the period	0	-1
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	3	1
Fair value, ending balance	37	26
Postretirement Benefits | Commodities
Summary of changes in fair values of assets
Fair value, ending balance	0	3
Postretirement Benefits | Commodities | Level 3
Summary of changes in fair values of assets
Fair value, beginning balance	0	4
Net transfers into / (out of) level 3	0	0
Purchases, sales, issuances, and settlements, net	0	-4
Realized gain (loss)	0	0
Change in unrealized gains/(losses) relating to instruments sold during the period	0	0
Change in unrealized gains/(losses) relating to instruments still held at the reporting date	0	0
Fair value, ending balance	$0	$0

Derivatives_Details

Derivatives (Details)

1 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2011

Dec. 31, 2014

Nov. 30, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Nov. 30, 2014

Aug. 31, 2011

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Aug. 31, 2011

Nov. 30, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Fixed rate Medium term note due 2016

Fixed rate Medium term note due 2016

Fixed rate Euro Medium term note due 2026

Fixed rate Euro Medium term note due 2026

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

Cash flow hedge

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

Foreign currency forward/option contracts

Foreign currency forward/option contracts

Foreign currency forward/option contracts

Foreign currency forward/option contracts

Foreign currency forward/option contracts

Foreign currency forward/option contracts

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts

Commodity price swap contracts

Commodity price swap contracts

Commodity price swap contracts

Commodity price swap contracts

Commodity price swap contracts

Commodity price swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

USD ($)

USD ($)

USD ($)

Cost of Sales

Cost of Sales

Cost of Sales

USD ($)

USD ($)

Interest expense

Interest expense

USD ($)

USD ($)

USD ($)

Cost of Sales

Cost of Sales

Cost of Sales

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

Fixed rate Medium term note due 2016

Fixed rate Euro Medium term note due 2026

Interest expense

Interest expense

Interest expense

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

USD ($)

Derivatives in Cash Flow Hedging Relationships

Maximum length of time hedged in cash flow hedge

24 months

12 months

Maximum length of time hedged in cash flow hedge prior to current period

12 months

Derivative notional amount

$2,200

$20

$400

€ 500

Principal amount

1,000

750

1,000

750

Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative

171

-98

3

183

9

-35

-108

42

-4

1

-4

-7

-8

0

0

Gain (Loss) on Hedged Item Recognized in Income

4

-122

72

3

-11

41

-108

42

2

-2

-10

-8

-1

-1

-1

Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges

99

-5

-4

-6

The time period estimated for the anticipated transfer of gains (losses), net from accumulated other comprehensive income into earnings

12 months

Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Term of debt instrument

5 years

12 years

5 years

12 years

Term of derivative contract

12 years

5 years

Amount anticipated to be reclassifed within next twelve months

$70

Derivatives_Details_1

Derivatives (Details 1)

Dec. 31, 2014

Jun. 30, 2014

Dec. 31, 2014

Jul. 31, 2007

Jul. 31, 2014

Aug. 31, 2010

Nov. 30, 2013

Jun. 30, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

In Millions, unless otherwise specified

Eurobond repaid July 2014

Fixed rate medium term note due 2019

Fixed rate medium term note due 2019

Fair value hedges

Fair value hedges

Fair value hedges

Fair value hedges

Fair value hedges

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

Derivatives designated as hedging instruments

EUR (€)

USD ($)

USD ($)

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Fair value hedges

Fair value hedges

Fair value hedges

Fair value hedges

Fair value hedges

Fair value hedges

Fair value hedges

Eurobond repaid July 2014

Eurobond repaid July 2014

Eurobond repaid July 2014

Eurobond Due 2021

Fixed rate medium term note due 2019

USD ($)

USD ($)

USD ($)

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

Interest rate swap contracts

EUR (€)

EUR (€)

EUR (€)

EUR (€)

USD ($)

USD ($)

Interest expense

Interest expense

Interest expense

USD ($)

USD ($)

USD ($)

Derivatives in Fair Value Hedging Relationships

Derivative notional amount

$600

€ 400

€ 300

$600

$1,000

Term of debt instrument

5 years

7 years

8 years

5 years

Face amount

1,025

625

600

750

600

625

Termination of notional amount of fixed-to-floating interest rate swap

150

Remaining amount matured from Interest Rate Swap

250

Gain (loss) on termination of fixed-to-floating interest rate swap will be amortized over this debt's remaining life

18

Interest rate, stated percentage (as a percent)

1.63%

1.88%

1.63%

Gain (Loss) on Derivative Recognized in income

11

-21

-5

11

-21

-5

Gain (Loss) on Hedged Item Recognized in Income

($11)

$21

$5

($11)

$21

$5

Derivatives_Details_2

Derivatives (Details 2)

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Nov. 30, 2014

Dec. 31, 2014

Dec. 31, 2013

Nov. 30, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2014

Eurobond repaid July 2014

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

Net Investment Hedges

EUR (€)

USD ($)

USD ($)

USD ($)

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts

Foreign currency forward contracts that matured in November 2013

Foreign Currency Denominated Debt

Foreign Currency Denominated Debt

Foreign Currency Denominated Debt

Foreign Currency Denominated Debt

USD ($)

USD ($)

EUR (€)

EUR (€)

Cost of Sales

Cost of Sales

EUR (€)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

USD ($)

Net investment hedges

Pretax Gain (Loss) Recognized as Cumulative Translation within Other Comprehensive Income on Effective Portion of Instrument

$246,000,000

($70,000,000)

($29,000,000)

$94,000,000

$12,000,000

$152,000,000

($82,000,000)

($29,000,000)

Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income

1,000,000

0

0

1,000,000

0

0

0

0

Face amount

1,025,000,000

Derivative notional amount

200,000,000

1,300,000,000

594,000,000

Face amount of debt dedesignated from net investment hedge

1,850,000,000

Effective portion of net investment hedge reclassified out of other comprehensive income into income

$0

Derivatives_Details_3

Derivatives (Details 3) (Derivatives not designated as hedging instruments, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivatives not designated as hedging instruments
Derivative notional amount	$6,600
Gain (Loss) on Derivative Recognized in income	-30	-24	-2
Foreign currency forward/option contracts | Cost of Sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	10	20	-24
Foreign currency forward contracts | Interest expense
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	-40	-43	22
Commodity price swap contracts | Cost of Sales
Derivatives not designated as hedging instruments
Gain (Loss) on Derivative Recognized in income	$0	($1)

Derivatives_Details_4

Derivatives (Details 4) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
	CounterParties
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	$256	$84
Fair Value of Derivative Instruments, Liabilities	43	110
Year-on-year currency effects impact on net income, including hedging impact	-97	-74
Year-on-year derivative and other transaction gains and (losses) impact	8	-12
Number of primary derivative counterparties	15
Number of master netting agreements supported by primary counterparty's parent guarantee	1
Number of credit support agreements by primary counterparty	14
Derivatives designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	190	33
Fair Value of Derivative Instruments, Liabilities	10	42
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	116	24
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	47
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	2	35
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	1
Derivatives designated as hedging instruments | Commodity price swap contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	0	1
Derivatives designated as hedging instruments | Commodity price swap contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	4	0
Derivatives designated as hedging instruments | Interest rate swap contracts | Other assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	27	8
Derivatives designated as hedging instruments | Interest rate swap contracts | Other liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	3	7
Derivatives not designated as hedging instruments
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	66	51
Fair Value of Derivative Instruments, Liabilities	33	68
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current assets
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Assets	66	51
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities
Location and Fair Value Amount of Derivative Instruments
Fair Value of Derivative Instruments, Liabilities	$33	$68

Derivatives_Details_5

Derivatives (Details 5) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	$256	$84
Net Amounts of Derivative Assets	236	33
Derivatives Subject to Master Netting Agreements
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	256	83
Gross Amount of Eligible Offsetting Recognized Derivative Liabilities	20	51
Cash Collateral Received	0	0
Net Amounts of Derivative Assets	236	32
Derivatives Not Subject to Master Netting Agreements
Offsetting of Financial Assets under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	0	1
Net Amounts of Derivative Assets	$0	$1

Derivatives_Details_6

Derivatives (Details 6) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	$43	$110
Net Amount of Derivative Liabilities	23	59
Derivatives Subject to Master Netting Agreements
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	36	110
Gross Amount of Eligible Offsetting Recognized Derivative Assets	20	51
Cash Collateral Pledged	0	0
Net Amount of Derivative Liabilities	16	59
Derivatives Not Subject to Master Netting Agreements
Offsetting of Financial Liabilities under Master Netting Agreements with Derivative Counterparties
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	7	0
Net Amount of Derivative Liabilities	$7	$0

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	$1,454	$2,209
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	256	84
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	43	110
Fair value on a recurring basis | Fair Value | Foreign currency forward/option contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	229	75
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	36	103
Fair value on a recurring basis | Fair Value | Commodity price swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet		1
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	4
Fair value on a recurring basis | Fair Value | Interest rate swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	27	8
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	3	7
Fair value on a recurring basis | Fair Value | U.S. government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	108	234
Fair value on a recurring basis | Fair Value | Foreign government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	95	125
Fair value on a recurring basis | Fair Value | Corporate debt securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	619	781
Fair value on a recurring basis | Fair Value | Certificates of deposit/time deposits
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	41	40
Fair value on a recurring basis | Fair Value | Commercial paper
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		60
Fair value on a recurring basis | Fair Value | Asset-backed securities Automobile loan related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	282	585
Fair value on a recurring basis | Fair Value | Asset-backed securities Credit card related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	162	180
Fair value on a recurring basis | Fair Value | Asset-backed securities Equipment lease related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	48	67
Fair value on a recurring basis | Fair Value | Asset-backed securities Other asset-backed securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	46	75
Fair value on a recurring basis | Fair Value | U.S. treasury securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	38	49
Fair value on a recurring basis | Fair Value | U.S. municipal securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	15	2
Fair value on a recurring basis | Fair Value | Auction rate securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		11
Fair value on a recurring basis | Fair Value | Investments
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	1	2
Fair value on a recurring basis | Level 1 | Foreign currency forward/option contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	0	0
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	0	0
Fair value on a recurring basis | Level 1 | Commodity price swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet		0
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	0
Fair value on a recurring basis | Level 1 | Interest rate swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	0	0
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	0	0
Fair value on a recurring basis | Level 1 | U.S. government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Foreign government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Corporate debt securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Certificates of deposit/time deposits
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Commercial paper
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		0
Fair value on a recurring basis | Level 1 | Asset-backed securities Automobile loan related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Asset-backed securities Credit card related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Asset-backed securities Equipment lease related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Asset-backed securities Other asset-backed securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | U.S. treasury securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	38	49
Fair value on a recurring basis | Level 1 | U.S. municipal securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 1 | Auction rate securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		0
Fair value on a recurring basis | Level 1 | Investments
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	1	2
Fair value on a recurring basis | Level 2 | Foreign currency forward/option contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	229	75
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	36	103
Fair value on a recurring basis | Level 2 | Commodity price swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet		1
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	4
Fair value on a recurring basis | Level 2 | Interest rate swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	27	8
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	3	7
Fair value on a recurring basis | Level 2 | U.S. government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	108	234
Fair value on a recurring basis | Level 2 | Foreign government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	95	125
Fair value on a recurring basis | Level 2 | Corporate debt securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	619	781
Fair value on a recurring basis | Level 2 | Certificates of deposit/time deposits
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	41	40
Fair value on a recurring basis | Level 2 | Commercial paper
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		60
Fair value on a recurring basis | Level 2 | Asset-backed securities Automobile loan related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	282	585
Fair value on a recurring basis | Level 2 | Asset-backed securities Credit card related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	162	180
Fair value on a recurring basis | Level 2 | Asset-backed securities Equipment lease related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	48	67
Fair value on a recurring basis | Level 2 | Asset-backed securities Other asset-backed securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	46	75
Fair value on a recurring basis | Level 2 | U.S. treasury securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 2 | U.S. municipal securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	2
Fair value on a recurring basis | Level 2 | Auction rate securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		0
Fair value on a recurring basis | Level 2 | Investments
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Foreign currency forward/option contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	0	0
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	0	0
Fair value on a recurring basis | Level 3 | Commodity price swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet		0
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	0
Fair value on a recurring basis | Level 3 | Interest rate swap contracts
Assets and Liabilities Measured on Recurring Basis
Gross Amounts of Derivative Assets Presented in the Consolidated Balance Sheet	0	0
Gross Amounts of Derivative Liabilities Presented in the Consolidated Balance Sheet	0	0
Fair value on a recurring basis | Level 3 | U.S. government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Foreign government agency securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Corporate debt securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Certificates of deposit/time deposits
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Commercial paper
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		0
Fair value on a recurring basis | Level 3 | Asset-backed securities Automobile loan related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Asset-backed securities Credit card related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Asset-backed securities Equipment lease related
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | Asset-backed securities Other asset-backed securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | U.S. treasury securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	0	0
Fair value on a recurring basis | Level 3 | U.S. municipal securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	15	0
Fair value on a recurring basis | Level 3 | Auction rate securities
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities		11
Fair value on a recurring basis | Level 3 | Investments
Assets and Liabilities Measured on Recurring Basis
Available-for-sale marketable securities	$0	$0

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of items measured at fair value on a recurring basis that used significant unobservable inputs (Level 3)
Balance at the beginning of the period	$11	$7	$4
Total gains or losses included in earnings	-1	0	0
Total gains or losses included in other comprehensive income	2	4	3
Purchases and issuances	15	0	0
Sales and settlements	-12	0	0
Transfers in and/or out of Level 3	0	0	0
Balance at the end of the period	15	11	7
Change in unrealized gains or losses for the period included in earnings for securities held at the end of the reporting period	$0	$0	$0

Fair_Value_Measurements_Detail2

Fair Value Measurements (Details 2)	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Eurobond repaid July 2014	Carrying Amount	Carrying Amount	Carrying Amount	Carrying Amount	Fair Value	Fair Value	Fair Value	Fair Value
	EUR (€)	USD ($)	USD ($)	Eurobond repaid July 2014	Eurobond repaid July 2014	USD ($)	USD ($)	Eurobond repaid July 2014	Eurobond repaid July 2014
				USD ($)	USD ($)			USD ($)	USD ($)
Financial Instruments
Eurobond securities repaid July 2014				$0	$1,424			$0	$1,447
Long-term debt, excluding current portion		6,731	4,326			7,203	4,463
Principal amount	€ 1,025

Commitments_and_Contingencies_1

Commitments and Contingencies (Details)	12 Months Ended			3 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2003	Dec. 31, 2014	Dec. 31, 2009	Dec. 31, 2014
	USD ($)	USD ($)	USD ($)	Building in United Kingdom	Building in United Kingdom	IT Investment	City of Nevada, MO leaseback capital lease obligation
				GBP (£)	USD ($)	USD ($)	USD ($)
Capital and Operating Leases:
Rental expense under operating leases	$332	$330	$300
Number of primary capital leases	3
Capital and operating leases with non-cancelable terms, low end of range	1 year
Primary Capital Leases
Capital lease term (in years)				22 years		7 years
Capital lease obligation	67			33.5	52	50	15
Minimum lease payments under capital leases
2015	11
2016	11
2017	7
2018	4
2019	3
After 2019	37
Total	73
Less: Amounts representing interest	6
Less: Current obligations under capital leases	8
Long-term obligations under capital leases	59	58
Minimum lease payments under operating leases
2015	225
2016	164
2017	126
2018	75
2019	54
After 2019	187
Total	831
Warranties/Guarantees:
Accrued product warranty liabilities	30	31
Unconditional Purchase Obligations
Due in 2015	131
Due in 2016	139
Due in 2017	92
Due in 2018	55
Due in 2019	34
Due after 2019	38
Total unconditional purchase obligation commitment	$489

Commitments_and_Contingencies_2

Commitments and Contingencies (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
	Claimant	Claimant
	Claim
Respirator Mask/Asbestos Litigation
Loss contingencies
Insurance receivables	$41,000,000
Total number of named claimants	2,220	2,200
Number of total claims settled and taken to trial	9
Number of total claims tried to verdict	8
Number of total claims settled and tried to verdict	7
Number of total claims dismissed	1
Increase in insurance liabilities	62,000,000
Payments for fees and settlements related to litigation	49,000,000
Respirator Mask/Asbestos Litigation - State of West Virginia
Loss contingencies
Amount of liability recorded for unspecified worker's compensation and healthcare benefits	0
Number of additional defendants	2
Respirator Mask/Asbestos litigation - Excluding Aearo Technologies
Loss contingencies
Accrued loss contingency reserve	140,000,000
Insurance Disclaimer Action
Loss contingencies
Proceeds received in connection with respirator mask/asbestos receivable	17,000,000
Number of insurers who filed a declaratory judgment action against the company	2
Respirator Mask/Asbestos Litigation - Aearo Technologies
Loss contingencies
Accrued loss contingency reserve	24,000,000
Quarterly fee paid to Cabot to retain responsibility and liability for products manufactured before July 11, 1995	100,000
Number of underlying claims concerning whether they were Cabot's responsibility	258
Outstanding issues remaining	2
Environmental Matters - Remediation
Loss contingencies
Accrued loss contingency reserve	28,000,000
Insurance receivables	11,000,000
Number of years remediation payments expected to be paid for applicable sites	20 years
Environmental Matters - Regulatory Activities
Loss contingencies
Number of PFCs the EPA has proposed to have public water suppliers monitor	6
Amount of PFOA in drinking water allowed per provisional health advisories in grams per liter	0.0000004
Amount of PFOS in drinking water allowed per provisional health advisories in grams per liter	0.0000002
Number of years after phase-out decision in May 2000 that the Company stopped manufacturing and using vast majority of perfluorooctanyl compounds	2 years
Environmental Matters - Regulatory Activities | Alabama
Loss contingencies
Wastewater treatment plant sludge containing PFCs surrounding Decatur facility pursuant to a permit	20 years
Environmental Matters - Litigation | Morgan County, Alabama
Loss contingencies
Total number of named claimants	3
Environmental Matters - Litigation | New Jersey
Loss contingencies
Lower end of range of number of companies served with a complaint	250
Number of additional defendants	5
Total cost of cleanup proposed by the EPA, of which the Company believes its applicable share, if any, is likely to be a fraction of one percent	1,000,000,000
Total cost of cleanup proposed by EPA of which company believes its applicable share to be fraction of this maximum percentage (as a percent)	1.00%
Number of commercial drum conditioning facilities used	2
Environmental Matters - Litigation | Metropolitan Council, Minnesota
Loss contingencies
Number of wastewater treatment plants from which PFC-containing sludge and biosolids may allegedly be discharged by Metropolitan Council, low end of range	1
Environmental Matters - Other Environmental Litigation
Loss contingencies
Accrued loss contingency reserve	43,000,000
Insurance receivables	$15,000,000
Number of former disposal sites with PFC present in soil and groundwater in Washington County, Minnesota	2
Environmental Matters - Other Environmental Litigation | Maximum
Loss contingencies
Number of years remediation payments expected to be paid for applicable sites	4 years

Commitments_and_Contingencies_3

Commitments and Contingencies (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014
	ClassActions
Commercial Litigation - Ceradyne Inc.
Loss contingencies
Number of purported class actions filed	4
Commercial Litigation - Ceradyne Inc. California Superior Court
Loss contingencies
Number of purported class actions filed	2
Commercial Litigation - Ceradyne Inc. Delaware Chancery Court
Loss contingencies
Number of purported class actions filed	2
Commercial Litigation - TransWeb Corporation
Loss contingencies
Number of counts jury did not rule in favor of Transweb	1
Number of 3M patents unenforceable due to inequitable conduct	2
Potential maximum loss exposure due to judgment against 3M	26,000,000
Accrued loss contingency reserve	0

Commitments_and_Contingencies_4

Commitments and Contingencies (Details 3) (EUR €)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
	Claimant
Product Liability - Filters
Product Liability Litigation
Number of customers who obtained an order in the French Courts against SAS 3M Purification	1
Number of customers who filed a lawsuit against 3M Deutshland GmbH	1
Number of other customers the Company has resolved claims with	2
Product Liability Litigation - EDF
Product Liability Litigation
Number of lawsuits filed	1
Amount of potential damages (minimum) EDF incurred as stated by court appointed expert witness	100
Product Liability Litigation - EDF | Maximum
Product Liability Litigation
Estimated time commercial court may take to render decision	1 year
Product Liability Litigation - EDF | Minimum
Product Liability Litigation
Estimated time commercial court may take to render decision	6 months

StockBased_Compensation_Detail

Stock-Based Compensation (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	31-May-12
	Participants
Share-based Compensation Arrangement by Share-based Payment Award Activity
Number of participants with outstanding options, restricted stock, or restricted stock units	9,525
Retirement age eligibility for employees	55 years
Retirement eligibility for employees, minimum years of service required	5 years
Percent of stock-based compensation related to retiree-eligible population (as a percent)	33.00%
General Employees' Stock Purchase Plan (GESPP)
Share-based Compensation Arrangement by Share-based Payment Award Activity
Number of shares authorized	60,000,000
Number of shares available for grant under the 2008 Long Term Incentive Plan Program (including additional subsequent shareholder approvals)	29,112,004	30,185,960	31,445,207
3M Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award Activity
Number of shares authorized				100,000,000
Awards other than options and Stock Appreciation Rights, number of shares counted for every one share awarded under plan limit with grant dates prior to May 11, 2010	3.38
Awards other than options and Stock Appreciation Rights, number of shares counted for every one share awarded under plan limit with grant dates on or after May 11, 2010 and prior to May 8, 2012	2.87
Awards other than options and Stock Appreciation Rights, number of shares counted for every one share awarded under plan limit with grant dates of May 8, 2012, or later	3.5
Number of shares available for grant under the 2008 Long Term Incentive Plan Program (including additional subsequent shareholder approvals)	28,293,674

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amounts recognized in the financial statements
Stock-based compensation programs expense	$280	$240	$223
Income tax benefits	-79	-71	-67
Stock-based compensation expenses, net of tax	201	169	156
Cost of Sales
Amounts recognized in the financial statements
Stock-based compensation programs expense	47	27	27
Selling, general and administrative expenses
Amounts recognized in the financial statements
Stock-based compensation programs expense	192	183	167
Research, development and related expenses
Amounts recognized in the financial statements
Stock-based compensation programs expense	$41	$30	$29

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 2) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	31-May-12
Share- based compensation assumptions
Stock-based compensation programs expense	$280	$240	$223
Stock Option Program
Stock Option Program
Balance at the beginning of the period	43,938,778	56,565,030	64,148,415
Granted - Annual	5,736,183	6,220,810	5,770,190
Granted - Progressive (Reload)	0	140,447	110,065
Granted - Other	0	191	51,661
Exercised	-10,219,261	-18,825,218	-13,123,617
Canceled	-220,143	-162,482	-391,684
Balance at the end of the period	39,235,557	43,938,778	56,565,030
Weighted average exercise price - Beginning balance	$83.84	$80.33	$77.28
Weighted average exercise price - Granted - Annual	$126.77	$101.55	$87.91
Weighted average exercise price - Granted - Progressive (Reload)	$0	$109.83	$89.65
Weighted average exercise price - Granted - Other	$0	$119.62	$89.25
Weighted average exercise price - Exercised	$82.37	$79.25	$68.78
Weighted average exercise price - Canceled	$105.11	$89.92	$83.65
Weighted average exercise price - Ending balance	$90.38	$83.84	$80.33
Expiration of annual grants	10 years
Options exercisable	27,502,208	32,038,228	45,207,143
Options exercisable, exercise price	$81.42	$79.58	$78.78
Weighted average remaining contractual life for options outstanding	65 months
Aggregate intrinsic value for options outstanding	2,901
Weighted average remaining contractual life for options exercisable	50 months
Aggregate intrinsic value for options exercisable	2,280
Compensation expense yet to be recognized	59
Weighted average life of remaining vesting period	21 months
Total intrinsic value of stock options exercised	615	562	282
Cash received from options exercised	842	1,492	903
Tax benefit realized from exercise of stock options	226	208	98
Stock Option Program | Maximum
Stock Option Program
Vesting period	3 years
Stock Option Program | Minimum
Stock Option Program
Vesting period	1 year
Stock Option Program | Annual Stock Option Program
Share- based compensation assumptions
Weighted average exercise price	$126.72	$101.49	$87.89
Risk-free interest rate (as a percent)	1.90%	1.20%	1.10%
Dividend yield (as a percent)	2.60%	2.70%	2.60%
Expected volatility (as a percent)	20.80%	20.00%	24.50%
Expected life	75 months	75 months	74 months
Black-Scholes fair value	$19.63	$13.46	$14.94
Stock Option Program | Progressive (Reload)
Share- based compensation assumptions
Weighted average exercise price		$109.84	$87.89
Risk-free interest rate (as a percent)		0.20%	0.20%
Dividend yield (as a percent)		2.70%	2.60%
Expected volatility (as a percent)		16.30%	23.40%
Expected life		12 months	19 months
Black-Scholes fair value		$6.42	$8.50
General Employees' Stock Purchase Plan (GESPP)
Stock Option Program
Granted - Annual	1,073,956	1,259,247	1,455,545
Exercised	-1,073,956	-1,259,247	-1,455,545
Weighted average exercise price - Granted - Annual	$118.73	$93.46	$75.32
Weighted average exercise price - Exercised	$118.73	$93.46	$75.32
Share- based compensation assumptions
Black-Scholes fair value	$20.95	$16.49	$13.29
Option price, percentage of market value at date of grant	85.00%
Option price, discount from market value at date of grant	15.00%
Stock-based compensation programs expense	$22	$21	$19
Number of shares authorized	60,000,000
Number of shares available for grant under the 2008 Long Term Incentive Plan Program (including additional subsequent shareholder approvals)	29,112,004	30,185,960	31,445,207
3M Long Term Incentive Plan
Share- based compensation assumptions
Number of shares authorized				100,000,000
Number of shares available for grant under the 2008 Long Term Incentive Plan Program (including additional subsequent shareholder approvals)	28,293,674

StockBased_Compensation_Detail3

Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units and Restricted Stock
Unit and Shares Activity:
Number of Awards - Nonvested - Beginning balance	3,105,361	3,261,562	4,858,972
Number of Awards - Granted - Annual	798,615	946,774	968,522
Number of Awards - Granted - Other	78,252	44,401	99,337
Number of Awards - Vested	-1,100,675	-1,100,095	-2,594,468
Number of Awards - Forfeited	-63,767	-47,281	-70,801
Number of Awards - Nonvested - Ending balance	2,817,786	3,105,361	3,261,562
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Weighted Average Grant Date Fair Value - Nonvested - Beginning balance	$92.31	$85.17	$73.02
Weighted Average Grant Date Fair Value - Granted - Annual	$126.79	$101.57	$87.92
Weighted Average Grant Date Fair Value - Granted - Other	$152.74	$111.19	$85.07
Weighted Average Grant Date Fair Value - Vested	$90.37	$79.93	$63.51
Weighted Average Grant Date Fair Value - Forfeited	$97.23	$90.82	$82.65
Weighted Average Grant Date Fair Value - Nonvested - Ending balance	$104.41	$92.31	$85.17
Vesting period	3 years
Weighted average life of remaining vesting period	26 months
Fair value that vested	$145,000,000	$114,000,000	$228,000,000
Compensation expense yet to be recognized	84,000,000
Tax benefit realized from vesting	54,000,000	43,000,000	86,000,000
Value of dividend equivalents for restricted stock units that are forfeited	0
Impact on basic earnings per share due to restricted stock units dividends	$0
Performance Shares
Unit and Shares Activity:
Number of Awards - Nonvested - Beginning balance	895,635	1,089,084	878,872
Number of Awards - Granted - Annual	305,225	353,734	467,531
Number of Awards - Vested	-277,358	-507,083	0
Number of Awards - Performance Change	212,461	-6,949	-178,838
Number of Awards - Forfeited	-36,212	-33,151	-78,481
Number of Awards - Nonvested - Ending balance	1,099,752	895,635	1,089,084
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Weighted Average Grant Date Fair Value - Nonvested - Beginning balance	$88.12	$79.27	$78.55
Weighted Average Grant Date Fair Value - Granted - Annual	$124.89	$96.87	$81.55
Weighted Average Grant Date Fair Value - Vested	$84.74	$75.16	$0
Weighted Average Grant Date Fair Value - Performance Change	$109.74	$77.01	$81.27
Weighted Average Grant Date Fair Value - Forfeited	$109.44	$91.34	$80.21
Weighted Average Grant Date Fair Value - Nonvested - Ending balance	$102.65	$88.12	$79.27
Weighted average life of remaining vesting period	11 months
Share-based compensation arrangement by share-based payment award, award vesting or performance period	3 years
Fair value that vested	35,000,000	52,000,000	0
Compensation expense yet to be recognized	22,000,000
Tax benefit realized from vesting	$11,000,000	$16,000,000	$0
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Number of shares to be delivered based on percent of each performance share granted upon satisfaction of performance conditions	200.00%
Vesting period	3 years
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures
Number of shares to be delivered based on percent of each performance share granted upon satisfaction of performance conditions	0.00%
Vesting period	1 year

Business_Segments_Narratives_D

Business Segments (Narratives) (Details) (USD $)	12 Months Ended		3 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
	Segment		Divisions
Business Segment Information
Number of operating business segments	5
Business Segments | Industrial
Business Segment Information
Increase (decrease) in net sales due to product transfers		$73
Business Segments | Safety and Graphics
Business Segment Information
Increase (decrease) in net sales due to product transfers		($73)
Business Segments | Electronics and Energy
Business Segment Information
Number of existing divisions affected by division combination			3
Number of affected divisions that exist after the division combination			2

Business_Segments_Segment_info

Business Segments (Segment information) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Segment Information
Net sales	$7,719	$8,137	$8,134	$7,831	$7,569	$7,916	$7,752	$7,634	$31,821	$30,871	$29,904
Operating Income									7,135	6,666	6,483
Assets	31,269				33,550				31,269	33,550	33,876
Depreciation and amortization									1,408	1,371	1,288
Capital expenditures									1,493	1,665	1,484
Business Segments | Industrial
Business Segment Information
Net sales									10,990	10,657	10,008
Operating Income									2,389	2,307	2,244
Assets	8,508				8,833				8,508	8,833	8,614
Depreciation and amortization									383	373	324
Capital expenditures									395	511	416
Business Segments | Safety and Graphics
Business Segment Information
Net sales									5,732	5,584	5,406
Operating Income									1,296	1,227	1,210
Assets	4,939				5,122				4,939	5,122	5,085
Depreciation and amortization									234	255	237
Capital expenditures									221	207	189
Business Segments | Electronics and Energy
Business Segment Information
Net sales									5,604	5,393	5,458
Operating Income									1,115	954	1,026
Assets	5,116				5,336				5,116	5,336	5,512
Depreciation and amortization									271	260	266
Capital expenditures									232	261	350
Business Segments | Health Care
Business Segment Information
Net sales									5,572	5,334	5,138
Operating Income									1,724	1,672	1,641
Assets	4,344				4,329				4,344	4,329	4,296
Depreciation and amortization									181	171	169
Capital expenditures									169	120	113
Business Segments | Consumer
Business Segment Information
Net sales									4,523	4,435	4,386
Operating Income									995	945	943
Assets	2,434				2,516				2,434	2,516	2,445
Depreciation and amortization									108	106	110
Capital expenditures									111	128	105
Corporate and Unallocated
Business Segment Information
Net sales									4	8	4
Operating Income									-251	-321	-472
Assets	5,928				7,414				5,928	7,414	7,924
Depreciation and amortization									231	206	182
Capital expenditures									365	438	311
Elimination of Dual Credit
Business Segment Information
Net sales									-604	-540	-496
Operating Income									($133)	($118)	($109)

Geographic_Areas_Details

Geographic Areas (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales	$7,719	$8,137	$8,134	$7,831	$7,569	$7,916	$7,752	$7,634	$31,821	$30,871	$29,904
Operating Income (Loss)									7,135	6,666	6,483
Property, Plant and Equipment - net	8,489				8,652				8,489	8,652
Geographic Area | United States
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									11,714	11,151	10,571
Operating Income (Loss)									2,540	2,210	1,938
Property, Plant and Equipment - net	4,619				4,478				4,619	4,478
Geographic Area | Asia Pacific
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									9,418	9,047	9,092
Operating Income (Loss)									2,487	2,386	2,450
Property, Plant and Equipment - net	1,798				1,943				1,798	1,943
Geographic Area | Europe, Middle East and Africa
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									7,198	7,085	6,730
Operating Income (Loss)									1,234	1,168	1,163
Property, Plant and Equipment - net	1,502				1,636				1,502	1,636
Geographic Area | Latin America and Canada
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									3,504	3,611	3,529
Operating Income (Loss)									867	908	936
Property, Plant and Equipment - net	570				595				570	595
Other Unallocated
Net Sales, Operating Income and Property, Plant and Equipment - Net
Net sales									-13	-23	-18
Operating Income (Loss)									7	-6	-4
Property, Plant and Equipment - net	$0				$0				$0	$0

Quarterly_Data_Unaudited_Detai

Quarterly Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Data (Unaudited)
Net sales	$7,719	$8,137	$8,134	$7,831	$7,569	$7,916	$7,752	$7,634	$31,821	$30,871	$29,904
Cost of sales	4,027	4,205	4,184	4,031	3,976	4,148	4,013	3,969	16,447	16,106	15,685
Net income including noncontrolling interest	1,179	1,311	1,283	1,225	1,116	1,245	1,213	1,147	4,998	4,721	4,511
Net income attributable to 3M	$1,179	$1,303	$1,267	$1,207	$1,103	$1,230	$1,197	$1,129	$4,956	$4,659	$4,444
Earnings per share attributable to 3M common shareholders - basic (in dollars per share)	$1.85	$2.02	$1.94	$1.83	$1.65	$1.81	$1.74	$1.63	$7.63	$6.83	$6.40
Earnings per share attributable to 3M common shareholders - diluted (in dollars per share)	$1.81	$1.98	$1.91	$1.79	$1.62	$1.78	$1.71	$1.61	$7.49	$6.72	$6.32