Stock-Based Compensation (Schedule Of Aggregate Number Of Shares And Cash That Could Be Awarded To Key Executives) (Details) shares in Thousands	Jun. 30, 2018 shares
2017-2019 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	8
2017-2019 [Member] | Target [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	19
2017-2019 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	37
2018-2020 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	3
2018-2020 [Member] | Target [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	8
2018-2020 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	16
2019-2021 [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	3
2019-2021 [Member] | Target [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	6
2019-2021 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares	12