Pension Plans and Other Postretirement Benefit Plans (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Funded Status of Pension Plans
Projected benefit obligation	$ 1,955.0		$ 1,757.0
Fair value of plan assets		[1]		[1]		[1]
Estimated Expected Future Benefit Payments Reflecting Future Service and Medicare Subsidy Receipts
Total payments net of subsidy	90.8		88.4		89.7
Total Payments Net of Subsidy
2013	105.5
2014	108.2
2015	110.4
2016	112.2
2017	114.4
2018 - 2022	587.8
Pension Plans
Funded Status of Pension Plans
Projected benefit obligation	1,954.6		1,757.2		1,616.0
Fair value of plan assets	1,445.3		1,250.4		985.1
Net funded status	(509.3)		(506.8)
Benefits paid	(88.2)		(85.1)
Accumulated benefit obligation	1,851		1,673
Pension Plans with Underfunded or Unfunded Accumulated Benefit Obligation
Projected benefit obligation	1,706.8		1,501.6
Accumulated benefit obligation	1,616.3		1,436.6
Fair value of plan assets	1,167.2		962.8
Estimated Expected Future Benefit Payments Reflecting Future Service and Medicare Subsidy Receipts
Medicare Subsidy Receipts
U.S. qualified pension plans
Funded Status of Pension Plans
Projected benefit obligation	1,427.0		1,299.8		1,206.2
Fair value of plan assets	1,131.7		955.3		719.3
Net funded status	(295.3)		(344.5)
Benefits paid	(66.4)		(65.5)
Pension Plans with Underfunded or Unfunded Accumulated Benefit Obligation
Projected benefit obligation	1,427.0		1,299.8
Accumulated benefit obligation	1,375.1		1,254.6
Fair value of plan assets	1,131.7		955.3
Estimated Expected Future Benefit Payments Reflecting Future Service and Medicare Subsidy Receipts
Benefit Payments, actual	66.4		65.5		65.1
Medicare Subsidy Receipts
Benefit Payments
2013	78.5
2014	81.4
2015	82.7
2016	83.3
2017	84.4
2018 - 2022	429.1
Total Payments Net of Subsidy
Funded status less than specified percentage, restriction on lump sum distribution to retiring participants	100.00%
Minimum percentage of plan to be funded and no longer in chapter 11 for lump sum distribution to retiring participants	80.00%
Estimated future benefit payments, amount excluded	28
Discount rate	3.75%
Percentage of high yield bonds in foreign issuers portfolio	30.00%
Expected return on plan assets	6.25%		7.75%
Average annual returns over one year (as a percent)	13.00%
Average annual returns over three years (as a percent)	11.00%
Average annual returns over five years (as a percent)	4.00%
Average annual returns over ten years (as a percent)	8.00%
U.S. qualified pension plans | Fully-Funded pension plans
Funded Status of Pension Plans
Projected benefit obligation		[2]		[2]	0.3	[2]
Fair value of plan assets		[2]		[2]	0.6	[2]
Net funded status		[2]		[2]	0.3	[2]
Benefits paid		[2]		[2]		[2]
Total Payments Net of Subsidy
Discount rate	3.75%		4.50%
U.S. qualified pension plans | Underfunded pension plans
Funded Status of Pension Plans
Projected benefit obligation	1,292.7	[2]	1,170.8	[2]	1,086.4	[2]
Fair value of plan assets	1,131.7	[2]	955.3	[2]	718.7	[2]
Net funded status	(161.0)	[2]	(215.5)	[2]	(367.7)	[2]
Benefits paid	(60.7)	[2]	(59.9)	[2]	(59.6)	[2]
Total Payments Net of Subsidy
Discount rate	3.75%
U.S. Nonqualified pension plans | Unfunded pension plans
Funded Status of Pension Plans
Projected benefit obligation	134.3	[1]	129.0	[1]	119.5	[1]
Fair value of plan assets		[1]		[1]		[1]
Net funded status	(134.3)	[1]	(129.0)	[1]	(119.5)	[1]
Benefits paid	(5.7)	[1]	(5.6)	[1]	(5.5)	[1]
Non-U.S. pension plans
Funded Status of Pension Plans
Projected benefit obligation	527.6		457.4		409.8
Fair value of plan assets	313.6		295.1		265.8
Net funded status	(214.0)		(162.3)
Benefits paid	(21.8)		(19.6)
Pension Plans with Underfunded or Unfunded Accumulated Benefit Obligation
Projected benefit obligation	279.8		201.8
Accumulated benefit obligation	241.2		182.0
Fair value of plan assets	35.5		7.5
Estimated Expected Future Benefit Payments Reflecting Future Service and Medicare Subsidy Receipts
Benefit Payments, actual	23.1		21.2		21.1
Medicare Subsidy Receipts
Benefit Payments
2013	22.7
2014	21.4
2015	22.0
2016	23.3
2017	24.6
2018 - 2022	135.6
Total Payments Net of Subsidy
Discount rate	4.06%		4.83%
Percentage of United Kingdom and German pension plans to total non-U.S. pension plans	84.00%
Expected return on plan assets	4.98%		5.96%
Non-U.S. pension plans | Fully-Funded pension plans
Funded Status of Pension Plans
Projected benefit obligation	235.4	[2]	224.0	[2]	195.8	[2]
Fair value of plan assets	269.2	[2]	261.1	[2]	231.1	[2]
Net funded status	33.8	[2]	37.1	[2]	35.3	[2]
Benefits paid	(11.8)	[2]	(10.2)	[2]	(10.9)	[2]
Total Payments Net of Subsidy
Discount rate	4.06%
Non-U.S. pension plans | Underfunded pension plans
Funded Status of Pension Plans
Projected benefit obligation	63.1	[2]	46.5	[2]	51.0	[2]
Fair value of plan assets	44.4	[2]	34.0	[2]	34.7	[2]
Net funded status	(18.7)	[2]	(12.5)	[2]	(16.3)	[2]
Benefits paid	(3.6)	[2]	(2.2)	[2]	(3.1)	[2]
Non-U.S. pension plans | Unfunded pension plans
Funded Status of Pension Plans
Projected benefit obligation	229.1	[1]	186.9	[1]	163.0	[1]
Net funded status	(229.1)	[1]	(186.9)	[1]	(163.0)	[1]
Benefits paid	(7.7)	[1]	(8.8)	[1]	(7.1)	[1]
Non-U.S. pension plans | United Kingdom
Total Payments Net of Subsidy
Discount rate	(4.25%)
Expected return on plan assets	4.50%
Non-U.S. pension plans | Germany
Total Payments Net of Subsidy
Discount rate	(3.50%)
Postretirement Benefits Other Than Pensions
Funded Status of Pension Plans
Projected benefit obligation	63.9		64.6		70.2
Fair value of plan assets	0		0		0
Net funded status	(63.9)		(64.6)
Benefits paid	(4.6)		(3.6)
Estimated Expected Future Benefit Payments Reflecting Future Service and Medicare Subsidy Receipts
Benefit Payments, actual	4.6		3.6		4.9
Medicare Subsidy Receipts	(3.3)		(1.9)		(1.4)
Benefit Payments
2013	6.2
2014	6.0
2015	5.8
2016	5.7
2017	5.5
2018 - 2022	23.4
Medicare Subsidy Receipts
2013	(1.9)
2014	(0.6)
2015	(0.1)
2016	(0.1)
2017	(0.1)
2018 - 2022	$ (0.3)
Total Payments Net of Subsidy
Discount rate	3.50%		4.00%

[1] Plans intended to be pay-as-you-go.

[2] Plans intended to be advance-funded.