Pension and Other Post-Retirement Benefits (Details 9) $ in Millions	Dec. 31, 2015 USD ($)
Qualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	$ 42.9
2017	27.9
2018	28.1
2019	28.2
2020	28.6
Years 2021-2025	144.5
Total	300.2
Nonqualified Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	2.5
2017	2.6
2018	2.6
2019	3.2
2020	3.5
Years 2021-2025	18.3
Total	32.7
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2016	3.9
2017	3.8
2018	3.3
2019	2.8
2020	2.6
Years 2021-2025	11.6
Total	$ 28.0