Employee Benefit Plans (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Pension plans
Employee Benefit Plans
Non-funded plan, current underfunded status	$ 166.3
Change in plan assets:
Fair value of plan assets - end of year	1,115.2	1,095.3
Domestic Pension Plans
Change in projected benefit obligation:
Projected benefit obligation - beginning of year	1,148.3	1,091.7
Service cost	9.9	9.3	8.0
Interest cost	57.4	61.1	66.2
Actuarial losses (gains)	53.0	63.9
Curtailment gain	(0.1)
Acquisitions	1.0
Benefits paid	(76.0)	(77.7)
Projected benefit obligation - end of year	1,193.5	1,148.3	1,091.7
Change in plan assets:
Fair value of plan assets - beginning of year	867.5	713.3
Return on plan assets	71.8	107.6
Benefits paid	(76.0)	(77.7)
Contributions (employer and employee)	4.2	124.3
Acquisitions	0.7
Fair value of plan assets - end of year	868.2	867.5	713.3
Funded status at year-end	(325.3)	(280.8)
Amounts recognized in the balance sheet consist of:
Accrued expenses	(6.4)	(4.2)
Other long-term liabilities	(318.9)	(276.6)
Net amount recognized	(325.3)	(280.8)
Amounts recognized in accumulated other comprehensive loss (pre-tax) consist of:
Net actuarial loss	616.4	593.3
Net prior service costs (credits)	(0.7)	(1.6)
Total accumulated comprehensive loss (pre-tax)	615.7	591.7
Foreign Pension Plans
Change in projected benefit obligation:
Projected benefit obligation - beginning of year	254.5	267.8
Service cost	2.5	2.2
Interest cost	14.0	14.0
Employee contributions	0.2	0.1
Actuarial losses (gains)	9.6	(13.0)
Curtailment gain	(0.1)
Acquisitions	16.1
Plan amendments		0.1
Benefits paid	(13.7)	(11.8)
Foreign exchange and other	(2.7)	(4.9)
Projected benefit obligation - end of year	280.4	254.5
Change in plan assets:
Fair value of plan assets - beginning of year	227.8	207.0
Return on plan assets	12.0	22.9
Benefits paid	(13.7)	(11.8)
Contributions (employer and employee)	10.9	12.7
Acquisitions	11.8
Foreign exchange and other	(1.8)	(3.0)
Fair value of plan assets - end of year	247.0	227.8
Funded status at year-end	(33.4)	(26.7)
Amounts recognized in the balance sheet consist of:
Other assets	23.7	22.3
Accrued expenses	(2.3)	(2.2)
Other long-term liabilities	(54.8)	(46.8)
Net amount recognized	(33.4)	(26.7)
Amounts recognized in accumulated other comprehensive loss (pre-tax) consist of:
Net actuarial loss	51.3	39.8
Net prior service costs (credits)	0.1
Total accumulated comprehensive loss (pre-tax)	51.4	39.8
Postretirement Plans
Change in projected benefit obligation:
Projected benefit obligation - beginning of year	152.5	152.3
Service cost	0.4	0.3	0.2
Interest cost	7.0	8.0	9.9
Actuarial losses (gains)	(3.9)	7.8
Acquisitions	7.0
Benefits paid	(14.3)	(15.9)
Projected benefit obligation - end of year	148.7	152.5	152.3
Change in plan assets:
Benefits paid	(14.3)	(15.9)
Funded status at year-end	(148.7)	(152.5)
Amounts recognized in the balance sheet consist of:
Accrued expenses	(15.7)	(16.2)
Other long-term liabilities	(133.0)	(136.3)
Net amount recognized	(148.7)	(152.5)
Amounts recognized in accumulated other comprehensive loss (pre-tax) consist of:
Net actuarial loss	44.9	53.3
Net prior service costs (credits)	(3.1)	(4.5)
Total accumulated comprehensive loss (pre-tax)	$ 41.8	$ 48.8