Earnings Per Share (Schedule Of Computation Of Earnings Per Share And Effect On Weighted-Average Number Of Shares) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Earnings Per Share [Line Items]
Net income attributable to Trimble Navigation Ltd.	$ 54,469	$ 53,364	$ 158,858	$ 157,874
Weighted average number of common shares used in basic earnings per share	257,037	251,742	256,135	250,404
Effect of dilutive securities	4,100	5,016	4,529	5,884
Weighted average number of common shares and dilutive potential common shares used in diluted earnings per share	261,137	256,758	260,664	256,288
Basic earnings per share	$ 0.21	$ 0.21	$ 0.62	$ 0.63
Diluted earnings per share	$ 0.21	$ 0.21	$ 0.61	$ 0.62

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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-URI http://asc.fasb.org/extlink&oid=6528421

+ Details