Stock-Based Compensation Plans (Schedule Of Future Share-Based Compensation Cost) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2016	$ 6.7
2017	4.1
2018	3.0
2019	2.3
2020	1.9
Thereafter	3.9
Total	21.9
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2016	2.2
2017	1.6
2018	1.3
2019	1.2
2020	1.1
Thereafter	3.4
Total	10.8
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2016	4.5
2017	2.5
2018	1.7
2019	1.1
2020	0.8
Thereafter	0.5
Total	$ 11.1