Stock Transactions And Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions			3 Months Ended		6 Months Ended
	Jun. 28, 2019 USD ($) shares	Mar. 01, 2019 USD ($) $ / shares shares	Jun. 28, 2019 USD ($) shares	Jun. 29, 2018 shares	Jun. 28, 2019 USD ($) shares	Jun. 29, 2018 USD ($) shares	Apr. 15, 2022 shares	Jul. 16, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized shares to be repurchased, shares | shares								20,000,000
Stock repurchase program, remaining number of shares authorized to be repurchased, shares | shares	20,000,000		20,000,000		20,000,000
Common stock, proceeds from issuance | $					$ 1,443.2	$ 0.0
Preferred stock, proceeds from the issuance | $					$ 1,599.6	$ 0.0
Common shares reserved for issuance under the 2007 Omnibus Incentive Plan, shares | shares	47,000,000		47,000,000		47,000,000
Restricted stock units (“RSUs”)/performance stock units (“PSUs”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost | $	$ 219.0		$ 219.0		$ 219.0
Weighted average period for cost to be recognized	3 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost | $	$ 194.0		$ 194.0		$ 194.0
Weighted average period for cost to be recognized	3 years
Preferred stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock | shares			0	0	1,700,000	0
Payments of stock issuance costs | $		$ 50.0
Preferred stock, shares issued | shares		1,650,000
Preferred stock, dividend rate, percent		4.75%
Preferred stock, liquidation preference per share | $ / shares		$ 1,000
Preferred stock, proceeds from the issuance | $		$ 1,600.0
Convertible preferred stock, threshold consecutive trading days		20
Preferred stock, annual liquidation preference, per share | $ / shares		$ 47.50
Preferred stock | Scenario, forecast | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion | shares							6.6373
Preferred stock | Scenario, forecast | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion | shares							8.1306
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock | shares		12,100,000	0	0	12,100,000	0
Common stock issued, price per share | $ / shares		$ 123.00
Common stock, proceeds from issuance | $		$ 1,400.0
Payments of stock issuance costs | $		$ 45.0