Pension and Savings Plans (Details 1) (Pension Plans, Defined Benefit [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plans, Defined Benefit [Member]
Amounts recognized in accumulated other comprehensive loss
Net actuarial loss arising during year	$ 67.6	$ 144.2	$ 13.1
Amortization:
Actuarial loss	(48.6)	(30.1)	(21.9)
Prior service cost	(1.0)	(1.0)	(1.4)
Total recognized in other comprehensive loss (income)	18.0	113.1	(10.2)
Net periodic pension cost	34.6	18.2	17.0
Total recognized in net periodic pension cost and other comprehensive loss (income)	$ 52.6	$ 131.3	$ 6.8