Stock Transactions And Stock-Based Compensation (Summary of Share Activity) (Details) - shares shares in Millions	3 Months Ended
Apr. 02, 2021	Apr. 03, 2020
Preferred stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	3.4	1.7
Balance, end of period	3.4	1.7
Common stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period	851.3	835.5
Common stock-based compensation awards	1.5	1.8
Common stock issued in connection with LYONs’ conversions	0.9	0.0
Balance, end of period	853.7	837.3

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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