Stock Transactions And Stock-Based Compensation (Summary of Share Activity) (Details) - shares shares in Millions		3 Months Ended
	Mar. 01, 2019	Apr. 03, 2020	Mar. 29, 2019
Preferred stock - shares issued:
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period		1.7	0.0
Issuance of stock		0.0	1.7
Balance, end of period		1.7	1.7
Common stock - shares issued:
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period		835.5	817.9
Issuance of stock	12.1	0.0	12.1
Common stock-based compensation awards		1.8	2.0
Common stock issued in connection with LYONs’ conversions		0.0	0.5
Balance, end of period		837.3	832.5