Earnings Per Share (Schedule Of Weighted Average Number Of Shares Outstanding Excluded From The Computation Of Diluted Earnings Per Share) (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted earnings	1.2	4.0	1.8	4.4
Performance-Based Restricted Stock Units (PBRSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted earnings	1.4	0.6	1.4	0.6
Performance Condition Unmet | Performance Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted earnings	5.5	2.7	6.1	2.7