Pension Plans and Other Postretirement Benefits (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 41.2	$ 21.9	$ 24.3
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	22.8	29.4	39.0
Interest cost on benefits earned in prior years	121.0	133.6	122.8
Expected return on plan assets	(168.3)	(184.2)	(176.0)
Amortization of prior service cost (credit)	1.3	2.3	3.0
Amortization of net actuarial loss	60.4	74.0	111.8
Curtailment (gain) loss	0.0	0.5	0.0
Termination benefits	0.0	0.3	4.8
Total retirement benefit expense	37.2	55.9	105.4
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the year	2.7	2.9	3.2
Interest cost on benefits earned in prior years	17.9	24.0	22.4
Expected return on plan assets	(0.1)	(0.3)	(0.5)
Amortization of prior service cost (credit)	4.9	(3.0)	(18.2)
Amortization of net actuarial loss	14.6	14.1	17.2
Curtailment (gain) loss	0.0	(25.5)	0.0
Termination benefits	0.0	0.0	1.3
Total retirement benefit expense	$ 40.0	12.2	25.4
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized		$ 2.6	$ 4.6