Stock Transactions And Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions				1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Dec. 31, 2019	Mar. 01, 2019	May 31, 2020	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019	Jul. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares to be repurchased									20,000
Remaining number of shares authorized to be repurchased	20,000				20,000		20,000
Common stock, proceeds from issuance							$ 1,728.5	$ 1,443.2
Preferred stock, proceeds from the issuance							$ 1,668.1	$ 1,599.6
Common shares reserved for issuance under the 2007 Omnibus Incentive Plan, shares	54,000				54,000		54,000
RSU/PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost	$ 222.0				$ 222.0		$ 222.0
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	$ 199.0				$ 199.0		$ 199.0
Weighted average period for cost to be recognized	3 years
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock				10,900
Common stock issued, price per share				$ 163.00
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock			12,100		10,900	0	10,900	12,100
Common stock issued, price per share			$ 123.00
Common stock, proceeds from issuance			$ 1,400.0	$ 1,730.0
Payments of stock issuance costs			$ 45.0	54.0
Threshold consecutive trading days			20
Preferred stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of stock					1,700	0	1,700	1,700
Preferred stock | Preferred stock series B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments of stock issuance costs				$ 49.0
Preferred stock, shares issued	1,720	0		1,720	1,720		1,720
Preferred stock, dividend rate, percent	5.00%	0.00%		5.00%
Preferred stock, liquidation preference per share				$ 1,000
Preferred stock, proceeds from the issuance				$ 1,670.0
Preferred stock | Preferred stock series A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments of stock issuance costs			$ 50.0
Preferred stock, shares issued	1,650	1,650	1,650		1,650		1,650
Preferred stock, dividend rate, percent	4.75%	4.75%	4.75%
Preferred stock, liquidation preference per share			$ 1,000
Preferred stock, proceeds from the issuance			$ 1,600.0