Pension and Postretirement Benefit Plans (Detail 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Qualified and Non-qualified Pension Benefits
Weighted-average assumptions used to determine net cost for years ended
Contributions made to the Company's plans	$ 556	$ 1,259
Expected future employer contributions in next fiscal year, low end of range	400
Expected future employer contributions in next fiscal year, high end of range	600
United States Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	201	183	192
Interest cost	638	619	597
Expected return on plan assets	(929)	(906)	(889)
Amortization of prior service cost (benefit)	13	16	15
Amortization of net actuarial (gain) loss	221	99	58
Net periodic benefit cost (benefit)	144	11	(27)
Settlements, curtailments, special termination benefits and other		26	7
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	144	37	(20)
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Prior service cost (benefit)			9
Amortization of prior service cost (benefit)	(13)	(16)	(15)
Net actuarial (gain) loss	227	585	2,337
Amortization of net actuarial (gain) loss	(221)	(99)	(58)
Total recognized in other comprehensive (income) loss	(7)	470	2,273
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	137	507	2,253
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of prior service cost (benefit)	11
Amortization of net actuarial (gain) loss	334
Total amortization expected over the next fiscal year	345
Weighted-average assumptions used to determine benefit obligations
Discount rate	5.23%	5.77%	6.14%
Compensation rate increase	4.00%	4.30%	4.30%
Percentage decrease in discount rate obligation from the prior year	0.54%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	5.77%	6.14%	6.00%
Expected return on assets	8.50%	8.50%	8.50%
Compensation rate increase	4.30%	4.30%	4.30%
Amount of company's common stock contributed by company		600
United States Qualified Pension Benefits
Asset Allocation assumption
Global equities	37.00%
Private equities	16.00%
Fixed-income securities	26.00%
Absolute return investments	16.00%
Commodities	5.00%
Company's assumption for the expected return on plan assets
Global equities	8.00%
Private equities	12.00%
Fixed-income securities	4.20%
Absolute return investments	6.00%
Commodities	5.80%
Expected rate of return on plan assets in next fiscal year	8.50%
Rate of return on plan assets	14.40%	12.60%	(13.60%)
Average annual actual return on plan assets over the past 10 years	6.40%
Average annual actual return on plan assets over the past 25 years	11.20%
International Qualified and Non-qualified Pension Benefits
Net periodic benefit cost (benefit)
Service cost	105	98	120
Interest cost	241	235	252
Expected return on plan assets	(278)	(260)	(305)
Amortization of transition (asset) obligation	1	3	3
Amortization of prior service cost (benefit)	(4)	(4)	(2)
Amortization of net actuarial (gain) loss	84	42	38
Net periodic benefit cost (benefit)	149	114	106
Settlements, curtailments, special termination benefits and other	(22)	25	3
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	127	139	109
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Transition (asset) obligation	(1)	(2)	(1)
Amortization of transition (asset) obligation	(1)	(3)	(3)
Prior service cost (benefit)	(91)	19	(37)
Amortization of prior service cost (benefit)	4	4	2
Net actuarial (gain) loss	104	224	622
Amortization of net actuarial (gain) loss	(84)	(42)	(38)
Foreign currency	(19)	(101)	202
Total recognized in other comprehensive (income) loss	(88)	99	747
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	39	238	856
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)	(13)
Amortization of net actuarial (gain) loss	112
Total amortization expected over the next fiscal year	98
Weighted-average assumptions used to determine benefit obligations
Discount rate	5.04%	5.30%	5.53%
Compensation rate increase	3.59%	3.72%	3.50%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	5.30%	5.53%	5.39%
Expected return on assets	6.90%	6.86%	7.19%
Compensation rate increase	3.72%	3.50%	3.82%
Postretirement Benefits
Net periodic benefit cost (benefit)
Service cost	55	51	53
Interest cost	88	97	100
Expected return on plan assets	(83)	(86)	(104)
Amortization of prior service cost (benefit)	(94)	(81)	(97)
Amortization of net actuarial (gain) loss	85	66	64
Net periodic benefit cost (benefit)	51	47	16
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	51	47	16
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Prior service cost (benefit)	69	(169)	(148)
Amortization of prior service cost (benefit)	94	81	97
Net actuarial (gain) loss	89	36	385
Amortization of net actuarial (gain) loss	(85)	(66)	(64)
Foreign currency	(1)	(1)	2
Total recognized in other comprehensive (income) loss	166	(119)	272
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	217	(72)	288
Amounts expected to be amortized from accumulated other comprehensive income into net periodic benefit costs over next fiscal year
Amortization of prior service cost (benefit)	(72)
Amortization of net actuarial (gain) loss	103
Total amortization expected over the next fiscal year	31
Weighted-average assumptions used to determine benefit obligations
Discount rate	5.09%	5.62%	6.14%
Percentage decrease in discount rate obligation from the prior year	0.53%
Weighted-average assumptions used to determine net cost for years ended
Discount rate	5.62%	6.14%	6.00%
Expected return on assets	7.30%	7.24%	8.60%
Contributions made to the Company's plans	$ 62	$ 133

Expected rate of return on plan assets in next fiscal year.

Name:	mmm_DefinedBenefitExpectedRateOfReturnOnAssetsPercentageNextFiscalYear
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage, expected long-term rate of return on absolute return investments

+ Details

Name:	mmm_DefinedBenefitExpectedReturnOnAssetsPercentageAbsoluteReturnInvestments
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage, expected long-term rate of return on commodities

+ Details

Name:	mmm_DefinedBenefitExpectedReturnOnAssetsPercentageCommodities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage, expected long-term rate of return on fixed-income securities

+ Details

Name:	mmm_DefinedBenefitExpectedReturnOnAssetsPercentageDebtSecurities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage, expected long-term rate of return on global equity securities

+ Details

Name:	mmm_DefinedBenefitExpectedReturnOnAssetsPercentageGlobalEquitySecurities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage, expected long-term rate of return on global equity securities

+ Details

Name:	mmm_DefinedBenefitExpectedReturnOnAssetsPercentagePrivateEquitySecurities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the actual return on the plan assets.

+ Details

Name:	mmm_DefinedBenefitPlanActualAverageAnnualReturn
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	mmm_DefinedBenefitPlanAssetsExpectedLongTermRateOfReturnAbstract
Namespace Prefix:	mmm
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The average annual actual return on plan assets over the past ten years, percentage.

+ Details

Name:	mmm_DefinedBenefitPlanAverageAnnualActualReturnOnPlanAssetsOverTenYearsPercentage
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The average annual actual return on plan assets over the past twenty-five years, percentage.

+ Details

Name:	mmm_DefinedBenefitPlanAverageAnnualActualReturnOnPlanAssetsOverTwentyFiveYearsPercentage
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position, high end of range.

+ Details

Name:	mmm_DefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYearHighEndOfRange
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ Details

Name:	mmm_DefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYearLowEndOfRange
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period, including the portions recognized in earnings and the portions recognized in other comprehensive income during the reporting period.

+ Details

Name:	mmm_DefinedBenefitPlanNetPeriodicBenefitCostIncludingPortionReceognizedInOtherComprehensiveIncome
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period, not including the costs for settlements, curtailments and special termination benefits.

+ Details

Name:	mmm_DefinedBenefitPlanNetPeriodicCostBeforeSettlementsCurtailmentsAndSpecialTerminationBenefits
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the percentage decrease in assumed discount rate from the prior year used in calculating the benefit obligation.

+ Details

Name:	mmm_DefinedBenefitPlanPercentageDecreaseInDiscountRateUsedCalculatingBenefitObligationFromPreviousFiscalyear
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The change in the benefit obligation of the defined benefit plan(s) due to settlements, curtailments, and special termination benefits.

+ Details

Name:	mmm_DefinedBenefitPlanSettlementsCurtailmentsAndSpecialTerminationBenefits
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Target allocation percentage of investments in private equity securities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ Details

Name:	mmm_DefinedBenefitPlanTargetAllocationPercentageOfAssetsAbsoluteReturnInvestments
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Target allocation percentage of investments in commodities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ Details

Name:	mmm_DefinedBenefitPlanTargetAllocationPercentageOfAssetsCommodities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Target allocation percentage of investments in global equity securities to total plan assets presented on a weighted-average basis, as of the measurement date of the latest statement of financial position.

+ Details

Name:	mmm_DefinedBenefitPlanTargetAllocationPercentageOfAssetsGlobalEquitySecurities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

+ Details

Name:	mmm_DefinedBenefitPlanTargetAllocationPercentageOfAssetsPrivateEquitySecurities
Namespace Prefix:	mmm
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The value of company's common stock shares contributed by the entity to fund its pension plans.

+ Details

Name:	mmm_EmployerContributionToPensionPlansValueOfStock
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	mmm_OtherChangesInPlanAssetsAndBenefitObligationsRecognizedInOtherComprehensiveIncomeLossAbstract
Namespace Prefix:	mmm
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the foreign currency adjustment related to defined benefit plan activity included in other comprehensive income during the period.

+ Details

Name:	mmm_OtherComprehensiveIncomeDefinedBenefitPlanForeignCurrencyAdjustmentRecognizedInNetPeriodicBenefitCostBeforeTax
Namespace Prefix:	mmm
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of gains or losses recognized in net periodic benefit cost

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h

+ Details

Name:	us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph s

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7
-Subparagraph d

+ Details

Name:	us-gaap_DefinedBenefitPlanAmortizationOfNetGainsLosses
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amounts in accumulated other comprehensive income related to transition assets (obligations), origination from the adoption of FAS 87 and 106, expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h

+ Details

Name:	us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the transition obligation or asset recognized in net periodic benefit cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h

+ Details

Name:	us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented (including the net gain or loss, net prior service cost or credit, and net transition asset or obligation).

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYear
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYearAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The interest rate used to adjust for the time value of money for the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The interest rate used to adjust for the time value of money.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph j

+ Details

Name:	us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h

+ Details

Name:	us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanInterestCost
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain or loss, prior service cost or credit, transition asset or obligation, and gain or loss due to settlements or curtailments).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph h

+ Details

Name:	us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanServiceCost
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Target allocation percentage of investments in debt securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph d(2)

+ Details

Name:	us-gaap_DefinedBenefitPlanTargetAllocationPercentageOfAssetsDebtSecurities
Namespace Prefix:	us-gaap
Data Type:	us-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The net prior service cost or credit recognized in other comprehensive income that is a reclassification adjustment of other comprehensive income as a result of being recognized as a component of net periodic benefit cost for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 17, 19, 24

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4
-Subparagraph c, d

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph i

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7
-Subparagraph a

+ Details

Name:	us-gaap_OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostCreditRecognizedInNetPeriodicBenefitCostBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The pretax cost (credit) of benefit changes attributable to plan participants' prior service resulting from a plan amendment or plan initiation that occurred during the period. The cost has not yet been recognized in net periodic benefit cost. A plan amendment includes provisions that grant increased (decreased) benefits based on services rendered in prior periods.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 17, 19, 24

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4
-Subparagraph c, d

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph i

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 37

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7
-Subparagraph a

+ Details

Name:	us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amounts recognized in other comprehensive income (but not yet recognized in net periodic benefit cost), including the net gain (loss) and net prior service cost (credit) arising during the period. Also includes reclassification adjustments out of other comprehensive income as a result of being recognized as components of net periodic benefit cost for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph C3

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 22, 26

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7
-Subparagraph a

+ Details

Name:	us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPeriodIncreaseDecrease
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Pretax change in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan, that has not been recognized in net periodic benefit cost.

+ References

+ Details

Name:	us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The pretax amount of the change in the additional minimum pension liability not yet recognized pursuant to FAS 87 as a net periodic pension cost. If the additional pension liability required to be recognized exceeds the unrecognized prior service costs, then the excess (which is the net loss not yet recognized as net periodic pension cost) is to be recorded as a separate component in other comprehensive income, before adjusting for tax effects. In a subsequent measurement, the elimination or adjustment to the amount of the minimum pension liability recorded in accumulated other comprehensive income is included in this line. Eliminated upon adoption of FAS 158.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 24
-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 19

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph B36

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph c(5)

+ Details

Name:	us-gaap_OtherComprehensiveIncomeMinimumPensionLiabilityNetAdjustmentBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net transition asset or obligation recognized, before tax, as a reclassification adjustment of other comprehensive income as a result of being recognized as a component of net periodic benefit cost for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7
-Subparagraph a

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4
-Subparagraph c, d

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph i

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

+ Details

Name:	us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The net gain or loss previously recognized in other comprehensive income that is a reclassification adjustment of other comprehensive income as a result of being recognized as a component of net periodic benefit cost for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 4
-Subparagraph d

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph i

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7
-Subparagraph a

+ Details

Name:	us-gaap_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

+ Details

Name:	us-gaap_PensionContributions
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration