Employee Benefit Plans (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Employee Benefit Plans
Direct benefit, net of federal subsidies paid to unfunded plan	$ 2.3
United States Pension Plans, Defined Benefit
Estimated benefit payments, net of subsidies:
2012	82.2
2013	83.6
2014	81.9
2015	142.1
2016	82.3
Subsequent five years	414.1
Qualified pension plans
Employee Benefit Plans
Expected contributions in 2012	46.8
Non-qualified pension plans
Employee Benefit Plans
Contributions made	4.2
Expected contributions in 2012	6.6
Foreign Pension Plans
Employee Benefit Plans
Contributions made	8.4
Expected contributions in 2012	8.2
Expected direct benefit payments in next fiscal year	2.3
Estimated benefit payments, net of subsidies:
2012	12.4
2013	13.0
2014	13.4
2015	14.0
2016	14.2
Subsequent five years	79.6
Foreign Pension Plans | Discontinued operations
Employee Benefit Plans
Contributions made	1.8
Expected contributions in 2012	1.7
Postretirement Plans
Employee Benefit Plans
Direct benefit, net of federal subsidies paid to unfunded plan	14.3
Amount of federal subsidies	1.6
Estimated benefit payments, net of subsidies:
2012	16.0
2013	15.3
2014	14.6
2015	14.0
2016	13.3
Subsequent five years	55.4
Postretirement Subsidies
2012	1.8
2013	1.8
2014	1.8
2015	1.7
2016	1.6
Subsequent five years	$ 7.1