Retirement Plans (Amounts Recognized On The Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost (included in accrued liabilities)	$ (347.8)	$ (356.6)
Pension liability	(1,076.3)	(533.0)
Postretirement benefits	(227.3)	(287.4)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension cost (included in other noncurrent assets)	9.5	4.4
Accrued benefit cost (included in accrued liabilities)	(7.2)	(24.9)
Pension liability	(1,076.3)	(533.0)
Postretirement benefits
Net liability recognized in the consolidated balance sheets	(1,074.0)	(553.5)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension cost (included in other noncurrent assets)
Accrued benefit cost (included in accrued liabilities)	(1.1)	(11.0)
Pension liability
Postretirement benefits	(227.3)	(287.4)
Net liability recognized in the consolidated balance sheets	$ (228.4)	$ (298.4)