Share-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Compensation expense recorded in net income for share based compensation plans
Compensation expense	$ 71	$ 50	$ 85
Income tax benefit	(26)	(18)	(32)
Total net compensation cost included in net income	45	32	53
Attribution of fair value of options issued and portion of previously granted options for which requisite service has been rendered	23	17	7
Compensation costs associated with unvested awards not recognized	62
Recognize compensation expense for unvested awards subject only to service conditions over a weighted average period	3 years
Stock option activity under the plan
Exercise of stock options (in shares)	(1,159,000)	(177,000)	(336,000)
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Maximum shares awarded to restricted stock or other full value awards	3,000,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Maximum term of options	10 years
Vesting period	3 years
Weighted average assumptions used in Black Scholes
Fair value of options at grant date	$ 10.19	$ 9.84	$ 7.39
Dividend yield (as a percent)	0.30%	0.30%	0.40%
Expected Volatility (as a percent)	40.00%	38.00%	37.00%
Risk free interest rate (as a percent)	0.90%	2.40%	2.60%
Expected term (in years)	5 years 6 months	5 years 6 months	5 years 6 months
Stock option activity under the plan
Outstanding at the beginning of year, number of stock options (in shares)	8,860,000
Grants in periods, number of options (in shares)	3,016,000
Exercise of stock options (in shares)	(1,159,000)
Canceled, expired or forfeited in period, number of options (in shares)	(1,233,000)
Outstanding at the end of year, number of stock options (in shares)	9,484,000	8,860,000
Exercisable options, number (in shares)	4,475,000
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning of Period	$ 27.68
Granted in Period, Weighted Average Exercise Price	$ 27.75
Exercises in Period, Weighted Average Exercise Price	$ (16.03)
Forfeitures and Expirations in Period, Weighted Average Exercise Price	$ (36.49)
Weighted Average Exercise Price, End of Period	$ 27.98	$ 27.68
Exercisable, Weighted Average Exercise Price	$ 29.12
Aggregate intrinsic value of outstanding options	12
Weighted average remaining contractual life of outstanding stock options	7 years
Aggregate intrinsic value of exercisable options	10
Weighted average remaining contractual life of exercisable options	5 years
Aggregate intrinsic value of options exercised	11	2	1
2007 Long term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award
Maximum shares authorized for issuance	12,000,000
Deferred Income Plan
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of base salary of Textron Executives that can be deferred	25.00%
Maximum percentage of annual long term incentive and other compensation of Executives	80.00%
Percentage of premium on amounts deferred	10.00%
Aggregate intrinsic value of amounts paid under the plan	$ 1	$ 1	$ 9

Attribution of fair value and portion of previously granted options for which requisite service has been rendered.

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Represents the aggregate intrinsic values of the amount paid under the plan.

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Percentage of base salary of executives.

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Maximum shares authorized for issuance.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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