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Basis of Presentation - Percentage of revenue from U.S. government contracts (Details)	12 Months Ended
	Dec. 31, 2016
New Accounting Pronouncements
Revenues from contracts with U.S. Government (as a percent)	25.00%

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- Definition

Percentage of revenue from contracts with U.S. Government that will be impacted by the new revenue recognition standard.

+ References

No definition available.

+ Details

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Namespace Prefix:	txt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration