Stock Transactions And Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Sep. 27, 2019	Mar. 01, 2019	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018	Apr. 15, 2022	Dec. 31, 2018	Jul. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized shares to be repurchased, shares									20,000,000
Stock repurchase program, remaining number of shares authorized to be repurchased, shares	20,000,000		20,000,000		20,000,000
Common stock, proceeds from issuance					$ 1,443.2	$ 0.0
Preferred stock, shares issued	1,650,000		1,650,000		1,650,000			0
Preferred stock, dividend rate, percent	4.75%
Preferred stock, proceeds from the issuance					$ 1,599.6	$ 0.0
Common shares reserved for issuance under the 2007 Omnibus Incentive Plan, shares	46,000,000		46,000,000		46,000,000
Restricted stock units (“RSUs”)/performance stock units (“PSUs”)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	$ 192.0		$ 192.0		$ 192.0
Weighted average period for cost to be recognized	2 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	$ 178.0		$ 178.0		$ 178.0
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			0	0	1,700,000	0
Payments of stock issuance costs		$ 50.0
Preferred stock, shares issued		1,650,000
Preferred stock, dividend rate, percent		4.75%
Preferred stock, liquidation preference per share		$ 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		$ 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							6.6382
Preferred stock | Scenario, forecast | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Convertible preferred stock, shares issued upon conversion							8.1318
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock		12,100,000	0	0	12,100,000	0
Common stock issued, price per share		$ 123.00
Common stock, proceeds from issuance		$ 1,400.0
Payments of stock issuance costs		$ 45.0