Pension Plans and Other Postretirement Benefits (Details1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	$ 10.0	$ 8.8	$ 30.0	$ 26.3
Interest cost on benefits earned in prior years	30.3	33.1	90.9	99.3
Expected return on plan assets	(43.8)	(45.4)	(131.4)	(136.1)
Amortization of prior service cost (credit)	0.8	1.6	2.3	4.8
Amortization of net actuarial loss	29.2	26.3	87.6	78.9
Total retirement benefit expense	26.5	24.4	79.4	73.2
Other Postretirement Benefit Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	0.8	0.8	2.4	2.4
Interest cost on benefits earned in prior years	5.6	6.5	16.8	19.5
Expected return on plan assets	(0.1)	(0.2)	(0.3)	(0.6)
Amortization of prior service cost (credit)	(4.6)	(4.5)	(13.7)	(13.6)
Amortization of net actuarial loss	4.3	3.6	12.9	10.9
Total retirement benefit expense	$ 6.0	$ 6.2	$ 18.1	$ 18.6