Retirement Benefits II (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Change in Plan Assets [Rollfoward]
Fair Value Beginning	$ 110.7	$ 104.7
Fair Value Ending	117.8	110.7	104.7
Defined Benefit Plans in Excess of Plan Assets [Abstract]
Projected benefit obligation	764.0	623.3
Accumulated benefit obligation	717.6	586.1
Fair value of plan assets	573.1	517.4
Assumed health care cost trend rates at December 31[Abstract]
Health care cost trend assumed for next year	9.00%	9.00%	8.00%
Rate to which the cost trend is assumed to decline	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2017	2017	2015
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
One Percentage Point Increase Effect on total of service and interest cost	0.1
One Percentage Point Decrease Effect on total of service and interest cost	(0.1)
One Percentage Point Increase Effect on postretirement benefit obligation	1.7
One Percentage Point Decrease Effect on postretirement benefit obligation	(1.5)
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Defined Benefit Plan Target Allocation Percentage Of Assets Equity Securities	38.00%
Defined Benefit Plan Target Allocation Percentage Of Assets Debt Securities	42.00%
Defined Benefit Plan Target Allocation Percentage Of Assets Other	20.00%
Defined Benefit Plan, Actual Plan Asset Allocations [Abstract]
Equity securities	40.00%	44.00%
Debt securities & Cash	41.00%	38.00%
Alternative Investments	19.00%	18.00%
Pension Benefits [Member]
Change in Plan Assets [Rollfoward]
Fair Value Beginning	622.0	575.8
Defined Benefit Plan, Actual Return on Plan Assets	31.7	54.6
Employer contributions	25.4	26.5
Currency impact	(0.6)	(0.9)
Benefits paid change in obligation	(31.6)	(34.7)
Fair Value Ending	647.6	622.0	575.8
Funded status	(184.8)	(100.5)
Amounts recognized in the consolidated balance sheet consist of [Abstract]
Prepaid pensions (included in Other Long-term assets)	6.0	6.2
Accrued benefit liability (short-term and long-term)	(190.8)	(106.7)
Net amount recognized in Balance Sheet	(184.8)	(100.5)
Amounts recognized in Accumulated other comprehensive loss (income) consist of [Abstract]
Net actuarial loss (gain)	245.3	153.8
Prior service cost (credit)	1.0	1.2
Net amount recognized in AOCI	246.3	155.0
Components of net periodic benefit cost [Abstract]
Service cost	13.6	12.7	12.2
Interest cost	38.1	37.8	36.9
Expected return on plan assets	(41.8)	(41.7)	(37.2)
Amortization of prior service cost/(credit)	0.2	0.3	0.3
Amortization of actuarial losses/(gains)	8.4	5.4	7.3
Curtailment and settlement losses (gains)	(0.1)	(0.1)	0.1
Net periodic benefit cost	18.4	14.4	19.6
Changes recognized in other comprehensive loss (income), before tax, (in millions) [Abstract]
Current year net actuarial (gain)/loss	99.8	46.7	(14.8)
Current year prior service (cost)/credit			0
Amortization of prior service (cost)/credit	(0.2)	(0.3)	(0.3)
Amortization of net actuarial loss	(8.4)	(5.4)	(7.3)
Currency Impact Recog In O C I	0.1	(3.3)	0
Other adjustments	0	0.5	0.4
Total recognized in accumulated other comprehensive (income) loss	91.3	38.2	(22.0)
Total recognized in net periodic pension cost and other comprehensive loss (income)	109.7	52.6	(2.4)
Amortization expected to be recognized through income during next year [Abstract]
Amortization of prior service cost/(credit)	0.2
Amortization of net loss	16.6
Total expected to be recognized through income during next fiscal year	16.8
Weighted-average assumptions used to determine benefit obligations at December 31[Abstract]
Discount rate	4.40%	5.40%	6.00%
Rate of compensation increase	3.50%	3.60%	3.60%
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31[Abstract]
Discount rate	5.40%	6.00%	6.50%
Expected return on plan assets	7.00%	7.50%	8.00%
Rate of compensation increase	3.60%	3.60%	4.10%
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Year One	33.9
Year Two	36.3
Year Three	38.3
Year Four	40.3
Year Five	42.6
Thereafter Year Five	242.2
Other Benefits [Member]
Change in Plan Assets [Rollfoward]
Benefits paid change in obligation	(2.4)	(3.2)
Funded status	(33.7)	(33.0)
Amounts recognized in the consolidated balance sheet consist of [Abstract]
Accrued benefit liability (short-term and long-term)	(33.7)	(33.0)
Net amount recognized in Balance Sheet	(33.7)	(33.0)
Amounts recognized in Accumulated other comprehensive loss (income) consist of [Abstract]
Net actuarial loss (gain)	2.6	0.8
Prior service cost (credit)	(8.1)	(9.1)
Net amount recognized in AOCI	(5.5)	(8.3)
Components of net periodic benefit cost [Abstract]
Service cost	0	0.3	0.6
Interest cost	1.6	2.1	1.7
Amortization of prior service cost/(credit)	(1.0)	(0.3)	(0.2)
Curtailment and settlement losses (gains)	0	(0.6)	0
Net periodic benefit cost	0.6	1.5	2.1
Changes recognized in other comprehensive loss (income), before tax, (in millions) [Abstract]
Current year net actuarial (gain)/loss	1.8	2.1	(0.3)
Current year prior service (cost)/credit	0	(7.6)	(0.8)
Amortization of prior service (cost)/credit	1.0	0.9	0.2
Total recognized in accumulated other comprehensive (income) loss	2.8	(4.6)	(0.9)
Total recognized in net periodic pension cost and other comprehensive loss (income)	3.4	(3.1)	1.2
Amortization expected to be recognized through income during next year [Abstract]
Amortization of prior service cost/(credit)	(1.0)
Total expected to be recognized through income during next fiscal year	(1.0)
Weighted-average assumptions used to determine benefit obligations at December 31[Abstract]
Discount rate	4.40%	5.40%	6.00%
Rate of compensation increase	3.50%	3.50%	3.50%
Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31[Abstract]
Discount rate	5.40%	6.00%	6.50%
Rate of compensation increase	3.50%	3.50%	4.00%
Other Benefits Gross [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Year One	2.9
Year Two	2.8
Year Three	2.8
Year Four	2.7
Year Five	2.7
Thereafter Year Five	12.3
Other Benefits Medicare Part D Subsidy [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Year One	0.2
Year Two	0.2
Year Three	0.2
Year Four	0.2
Year Five	0.2
Thereafter Year Five	0.8
Other Benefits Net [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
Year One	2.7
Year Two	2.6
Year Three	2.6
Year Four	2.5
Year Five	2.5
Thereafter Year Five	$ 11.5