Employee Benefit Plans (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Employee Benefit Plans
Direct benefit, net of federal subsidies paid to unfunded plan	$ 2.3
United States Pension Plans, Defined Benefit
Estimated minimum benefit payments, net of subsidies:
2013	80.5
2014	80.3
2015	145.0
2016	79.8
2017	80.3
Subsequent five years	406.7
Qualified pension plans
Employee Benefit Plans
Contributions made	35.4
Expected minimum required funding contributions in 2013	27.9
Non-qualified pension plans
Employee Benefit Plans
Contributions made	4.5
Expected minimum required funding contributions in 2013	6.0
Foreign Pension Plans
Employee Benefit Plans
Contributions made	10.4
Expected minimum required funding contributions in 2013	17.7
Expected direct benefit payments in next fiscal year	2.8
Estimated minimum benefit payments, net of subsidies:
2013	12.2
2014	12.6
2015	13.4
2016	14.0
2017	14.9
Subsequent five years	77.6
Foreign Pension Plans | Discontinued operations
Employee Benefit Plans
Contributions made	1.8
Expected minimum required funding contributions in 2013	2.5
Postretirement Plans
Employee Benefit Plans
Direct benefit, net of federal subsidies paid to unfunded plan	13.8
Amount of federal subsidies	1.7
Estimated minimum benefit payments, net of subsidies:
2013	14.8
2014	14.2
2015	13.6
2016	12.9
2017	12.2
Subsequent five years	51.2
Postretirement Subsidies
2013	1.5
2014	1.5
2015	1.5
2016	1.5
2017	1.4
Subsequent five years	$ 6.1