Other Events (Details 6) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2009
Status of involuntary severance liabilities
Workforce reduction costs	$ 12.6
Q1 2009 Program
Status of involuntary severance liabilities
Positions eliminated	180
Initial severance liability balance	10.8
Additional expenses recorded in 2009	1.8
Net cash severance liability	12.6
Cash severance payments	(12.0)
Severance liability balance	0.6
Q4 2008 Program
Status of involuntary severance liabilities
Initial severance liability balance	19.7
Amounts recorded as pension and postretirement liabilities	(3.0)
Net cash severance liability	16.7
Cash severance payments	(15.8)
Severance liability balance	$ 0.9