Condensed Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 30, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Amortization of retirement benefits adjustments, tax	$ 9	$ 26
Foreign currency translation adjustments, tax	$ (1)	$ (4)

Tax effect of the income statement impact of the reclassification adjustment for prior service costs recognized as a component of net period benefit cost.

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+ Details

- Definition

Amount of tax effect, net of reclassification adjustments, on the result from the process of expressing in the reporting currency of the reporting entity those amounts that are denominated or measured in a different currency.

+ References

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+ Details