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Derivative Financial Instruments (Narrative) (Details) $ in Thousands	Dec. 29, 2018 USD ($)
Designated as Hedging Instrument | Interest Rate Swaps
Derivative
Notional Amount, Derivative	$ 150,000
Conversion Rate Of Interest Rate Swaps From Variable to Fixed	2.87%
Basis Spread on Variable Rate Derivative	1.63%
Designated as Hedging Instrument | Foreign Currency Contracts
Derivative
Notional Amount, Derivative	$ 63,466
Designated as Hedging Instrument | Net Investment Hedge
Derivative
Notional Amount, Derivative	0
Not Designated as Hedging Instrument | Foreign Currency Contracts
Derivative
Notional Amount, Derivative	$ 95,298

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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Namespace Prefix:	invest_
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Balance Type:	na
Period Type:	instant

X

- Definition

Conversion rate of interest rate swaps.

+ References

No definition available.

+ Details

Name:	mog_ConversionRateOfInterestRateSwapsFromVariableToFixed
Namespace Prefix:	mog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
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X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_NetInvestmentHedgingMember
Namespace Prefix:
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Period Type:

X

- Details

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