Fair Value Measurement (Schedule Of Acquisition-Related Contingent Consideration) (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
	Jan. 28, 2020	Jun. 30, 2020	Jun. 30, 2020
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Weighted Average Cost of Capital			11.50%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low		$ 0.0	$ 0.0
Business Combination, Contingent Consideration, Arrangements, Range of Outcomes, Value, High		908.3	908.3
Business Combination, Contingent Consideration, Liability		374.7	374.7
Acquisition-Related Contingent Consideration [Roll Forward]
Asset Acquisition, Contingent Consideration, Milestone Payments		160.7
Acquisition-related contingent consideration | Level 3
Acquisition-Related Contingent Consideration [Roll Forward]
Balance at beginning of period			192.4
Change in fair value		21.6
Balance at end of period		$ 374.7	$ 374.7
Acquisition-related contingent consideration | Minimum | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Cost of Debt	2.10%		0.40%
Fair Value Inputs, Weighted Average Cost of Capital			9.00%
Acquisition-related contingent consideration | Maximum | Level 3
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Cost of Debt	2.30%		0.70%