Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan employer contribution	$ 3.5	$ 3.4	$ 3.4
Net periodic benefit cost: [Abstract]
Curtailment gain, net	(0.2)
Settlement loss	0.8
Other changes in plan assets and benefit obligations recognized in other comprehensive income, pre-tax: [Abstract]
Curtailment gain, net	0.2
Settlement loss	0.8
Amounts recognized in balance sheet [Abstract]
Current liabilities	(2.3)	(2.1)
Noncurrent liabilities	(126.0)	(87.2)
Estimated future benefit payment [Abstract]
2012	16.7
2013	18.1
2014	21.0
2015	22.5
2016	24.4
2017 to 2021	144.3
Total	247.0
Minimum ERISA funding requirement, U.S. qualified plan	17.2
Allocation range [Abstract]
Assumed healthcare cost trend rate used to determine benefit obligations (in hundredths)	8.50%
Ultimate health care cost trend rate (in hundredths)	5.00%
Year that rate reaches ultimate trend rate	2,019
One percentage point increase - effect on post-retirement benefit obligation	1.1
One percentage point decrease - effect on post-retirement benefit obligation	1.0
Assumed healthcare cost trend rate used to determine net periodic benefit cost (in hundredths)	9.00%
Ultimate health care cost trend rate for net periodic benefit cost (in hundredths)	5.00%
Year that rate reaches ultimate trend rate, net periodic benefit cost	2,019
One percentage point change in the rate - effect on service and interest cost components	0.2
Cash [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	0.2
Fair value of assets	0.2
Allocation range [Abstract]
Fair value of assets	0.2
Cash Overdrafts [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end		(0.6)
Fair value of assets		(0.6)
Allocation range [Abstract]
Fair value of assets		(0.6)
Balanced Mutual Fund [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	4.0
Fair value of assets	4.0
Allocation range [Abstract]
Fair value of assets	4.0
Indexed Mutual Funds, Equity [Members]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	102.2	108.1
Fair value of assets	102.2	108.1
Allocation range [Abstract]
Fair value of assets	102.2	108.1
International Mutual Funds, Equity [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	40.0	37.7
Fair value of assets	40.0	37.7
Allocation range [Abstract]
Fair value of assets	40.0	37.7
Fixed Income Mutual Funds [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	65.6	65.6
Fair value of assets	65.6	65.6
Allocation range [Abstract]
Fair value of assets	65.6	65.6
Insurance Contract [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	1.3	1.5
Fair value of assets	1.3	1.5
Allocation range [Abstract]
Fair value of assets	1.3	1.5
Level 1 [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	212.0	210.8
Fair value of assets	212.0	210.8
Allocation range [Abstract]
Fair value of assets	212.0	210.8
Level 1 [Member] | Cash [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	0.2
Fair value of assets	0.2
Allocation range [Abstract]
Fair value of assets	0.2
Level 1 [Member] | Cash Overdrafts [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end		(0.6)
Fair value of assets		(0.6)
Allocation range [Abstract]
Fair value of assets		(0.6)
Level 1 [Member] | Balanced Mutual Fund [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	4.0
Fair value of assets	4.0
Allocation range [Abstract]
Fair value of assets	4.0
Level 1 [Member] | Indexed Mutual Funds, Equity [Members]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	102.2	108.1
Fair value of assets	102.2	108.1
Allocation range [Abstract]
Fair value of assets	102.2	108.1
Level 1 [Member] | International Mutual Funds, Equity [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	40.0	37.7
Fair value of assets	40.0	37.7
Allocation range [Abstract]
Fair value of assets	40.0	37.7
Level 1 [Member] | Fixed Income Mutual Funds [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	65.6	65.6
Fair value of assets	65.6	65.6
Allocation range [Abstract]
Fair value of assets	65.6	65.6
Level 2 [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	1.3	1.5
Fair value of assets	1.3	1.5
Allocation range [Abstract]
Fair value of assets	1.3	1.5
Level 2 [Member] | Insurance Contract [Member]
Change in benefit obligation: [Roll Forward]
Fair value of assets, period end	1.3	1.5
Fair value of assets	1.3	1.5
Allocation range [Abstract]
Fair value of assets	1.3	1.5
Pension Benefits [Member]
Net periodic benefit cost: [Abstract]
Service cost	8.9	8.6	7.8
Interest cost	16.0	15.7	14.9
Expected return on assets	(16.0)	(14.7)	(11.9)
Amortization of prior service (credit) cost	(1.5)	(1.1)	(1.1)
Amortization of transition obligation	0.1	0.1	0.1
Recognized actuarial losses (gains)	6.0	5.6	7.0
Curtailment gain, net	(0.2)
Settlement loss	0.8
Net periodic benefit cost	14.1	14.2	16.8
Other changes in plan assets and benefit obligations recognized in other comprehensive income, pre-tax: [Abstract]
Net loss (gain) arising during period	46.7	9.1	(2.9)
Prior service credit arising during period		(5.2)
Curtailment	0.2
Settlement effects	(0.8)
Amortization of prior service credit (cost)	1.5	1.1	1.1
Amortization of transition obligation	(0.1)	(0.1)	(0.1)
Amortization of actuarial (loss) gain	(6.0)	(5.6)	(7.0)
Total recognized in other comprehensive income	41.5	(0.7)	(8.9)
Total recognized in net periodic benefit cost and other comprehensive income	55.6	13.5	7.9
Curtailment gain, net	0.2
Settlement loss	0.8
Change in benefit obligation: [Roll Forward]
Benefit obligation, beginning period	(283.5)	(262.8)
Service cost	(8.9)	(8.6)	(7.8)
Interest cost	(16.0)	(15.7)
Actuarial (loss) gain	(27.3)	(15.9)
Amendments/transfers in	(0.4)	5.2
Benefits/expenses paid	16.4	12.4
Curtailment	(0.8)
Foreign currency translation	0.6	1.9
Benefit obligation, period end	(319.9)	(283.5)	(262.8)
Fair value of assets, beginning period	212.3	193.5
Actual return on assets	(2.8)	21.6
Employer contribution	20.4	10.3
Foreign currency translation	(0.2)	(0.6)
Benefits/expenses paid	(16.4)	(12.4)
Fair value of assets, period end	213.3	212.3	193.5
Funded status at end of year	(106.6)	(71.2)
Fair value of assets	213.3	212.3	193.5
Amounts recognized in balance sheet [Abstract]
Current liabilities	(1.2)	(1.1)
Noncurrent liabilities	(105.4)	(70.1)
Total	(106.6)	(71.2)
Amounts in accumulated other comprehensive loss, pre tax [Abstract]
Net actuarial loss (gain)	131.3	92.1
Transition obligation	0.4	0.5
Prior service (credit) cost	(10.2)	(12.7)
Total	121.5	79.9
Net actuarial loss that will be amortized into net pension expense over the next fiscal year	8.3
Transition obligation that will be amortized into net pension expense over the next fiscal year	0.1
Prior service credit that will be amortized into net pension expense over the next fiscal year	(1.4)
Accumulated benefit obligation	316.7	280.4
Estimated future benefit payment [Abstract]
Estimated future employer contributions in next fiscal year	19.8
Weighted-average assumption used to determine net periodic benefit cost [Abstract]
Discount rate (in hundredths)	5.55%	5.92%	6.38%
Rate of compensation increase (in hundredths)	4.33%	4.36%	4.37%
Long-term rate of return on assets (in hundredths)	7.59%	7.60%	7.66%
Weighted-average assumption used to determine benefit obligation [Abstract]
Discount rate (in hundredths)	4.87%	5.61%
Rate of compensation increase (in hundredths)	4.33%	4.36%
Weighted average asset allocations [Abstract]
Equity securities (in hundredths)	68.00%	69.00%
Debt securities (in hundredths)	31.00%	31.00%
Other (in hundredths)	1.00%
Total (in hundredths)	100.00%	100.00%
Allocation range [Abstract]
Fair value of assets	213.3	212.3	193.5
Other Retirement Benefits [Member]
Net periodic benefit cost: [Abstract]
Service cost	1.2	1.1	0.8
Interest cost	1.0	0.8	0.9
Amortization of prior service (credit) cost	0.1	0.1	0.1
Recognized actuarial losses (gains)		(0.1)
Net periodic benefit cost	2.3	1.9	1.8
Other changes in plan assets and benefit obligations recognized in other comprehensive income, pre-tax: [Abstract]
Net loss (gain) arising during period	1.3	(1.5)	1.8
Curtailment	0.4
Amortization of prior service credit (cost)	(0.1)	(0.1)	(0.1)
Amortization of actuarial (loss) gain		0.1
Total recognized in other comprehensive income	1.6	(1.5)	1.7
Total recognized in net periodic benefit cost and other comprehensive income	3.9	0.4	3.5
Change in benefit obligation: [Roll Forward]
Benefit obligation, beginning period	(18.1)	(18.1)
Service cost	(1.2)	(1.1)	(0.8)
Interest cost	(1.0)	(0.9)
Participants' contributions	(0.3)	(0.4)
Actuarial (loss) gain	(1.4)	1.5
Benefits/expenses paid	0.7	0.9
Curtailment	(0.4)
Benefit obligation, period end	(21.7)	(18.1)	(18.1)
Employer contribution	0.4	0.5
Participants' contribution	0.3	0.4
Benefits/expenses paid	(0.7)	(0.9)
Funded status at end of year	(21.7)	(18.1)
Amounts recognized in balance sheet [Abstract]
Current liabilities	(1.1)	(1.0)
Noncurrent liabilities	(20.6)	(17.1)
Total	(21.7)	(18.1)
Amounts in accumulated other comprehensive loss, pre tax [Abstract]
Net actuarial loss (gain)	0.2	(1.5)
Prior service (credit) cost	0.1	0.2
Total	0.3	(1.3)
Prior service credit that will be amortized into net pension expense over the next fiscal year	0.1
Estimated future benefit payment [Abstract]
Estimated future employer contributions in next fiscal year	1.1
Weighted-average assumption used to determine net periodic benefit cost [Abstract]
Discount rate (in hundredths)	5.25%	5.25%	6.25%
Weighted-average assumption used to determine benefit obligation [Abstract]
Discount rate (in hundredths)	4.50%	5.25%
U.S. Other Retirement Benefit Plans [Member]
Net periodic benefit cost: [Abstract]
Net periodic benefit cost	2.3	1.9	1.8
International Pension Benefit Plans [Member]
Net periodic benefit cost: [Abstract]
Net periodic benefit cost	2.7	2.5	1.9
Change in benefit obligation: [Roll Forward]
Fair value of assets, beginning period	18.6
Fair value of assets, period end	19.6	18.6
Fair value of assets	19.6	18.6
Amounts in accumulated other comprehensive loss, pre tax [Abstract]
Accumulated benefit obligation	42.6	40.5
Estimated future benefit payment [Abstract]
Estimated future employer contributions in next fiscal year	1.8
Weighted-average assumption used to determine benefit obligation [Abstract]
Discount rate (in hundredths)	4.72%	5.09%
Rate of compensation increase (in hundredths)	2.70%	2.71%
Allocation range [Abstract]
Fair value of assets	19.6	18.6
U.S. Pension Benefit Plans [Member]
Net periodic benefit cost: [Abstract]
Net periodic benefit cost	11.4	11.7	14.9
Weighted-average assumption used to determine net periodic benefit cost [Abstract]
Long-term rate of return on assets (in hundredths)	7.75%	7.75%	7.75%
Weighted-average assumption used to determine benefit obligation [Abstract]
Discount rate (in hundredths)	4.90%	5.70%
Rate of compensation increase (in hundredths)	4.50%	4.50%
Percentage of global plan assets (in hundredths)	91.00%
Target allocation [Abstract]
Equity securities (in hundredths)	65.00%
Debt securities	35.00%
Allocation range [Abstract]
Equity securities, minimum (in hundredths)	60.00%
Equity securities, maximum (in hundredths)	70.00%
Debt securities, minimum (in hundredths)	30.00%
Debt securities, maximum (in hundredths)	40.00%
Other, maximum (in hundredths)	5.00%
U. S. Plans [Member]
Estimated future benefit payment [Abstract]
2012	15.5
2013	16.7
2014	19.4
2015	20.9
2016	22.3
2017 to 2021	130.2
Total	225.0
International Plans [Member]
Estimated future benefit payment [Abstract]
2012	1.2
2013	1.4
2014	1.6
2015	1.6
2016	2.1
2017 to 2021	14.1
Total	$ 22.0