Retirement Plans (Schedule Of Expected Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2012	$ 180.9
2013	185.4
2014	188.6
2015	193.1
2016	198.9
2017-2021	1,131.7
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2012	32.8
2013	31.4
2014	31.2
2015	30.9
2016	30.8
2017-2021	145.3
Estimated Medicare Subsidy Reimbursements [Member]
Defined Benefit Plan Disclosure [Line Items]
2012	1.5
2013
2014
2015
2016
2017-2021