Retirement Plans and Post Retirement Benefits Pension Costs, Assumptions Used in Net Periodic Costs and Expected Contributions and Payments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2014 Minimum	Mar. 31, 2014 Maximum	Dec. 31, 2012 Supplemental employee retirement plans, defined benefit	Dec. 31, 2013 Quoted Prices in Active Markets for Identical Assets (Level 1)	Dec. 31, 2012 Quoted Prices in Active Markets for Identical Assets (Level 1)	Dec. 31, 2013 Fair Value, Inputs, Level 2	Dec. 31, 2012 Fair Value, Inputs, Level 2	Dec. 31, 2013 Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 Significant Unobservable Inputs (Level 3)	Dec. 31, 2011 Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 Diversified real asset funds		Dec. 31, 2012 Diversified real asset funds		Dec. 31, 2013 Diversified real asset funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 Diversified real asset funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 Diversified real asset funds Fair Value, Inputs, Level 2		Dec. 31, 2012 Diversified real asset funds Fair Value, Inputs, Level 2		Dec. 31, 2013 Diversified real asset funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 Diversified real asset funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2013 Domestic stock funds		Dec. 31, 2012 Domestic stock funds		Dec. 31, 2013 Domestic stock funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 Domestic stock funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 Domestic stock funds Fair Value, Inputs, Level 2		Dec. 31, 2012 Domestic stock funds Fair Value, Inputs, Level 2		Dec. 31, 2013 Domestic stock funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 Domestic stock funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2013 International stock funds		Dec. 31, 2012 International stock funds		Dec. 31, 2013 International stock funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 International stock funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 International stock funds Fair Value, Inputs, Level 2		Dec. 31, 2012 International stock funds Fair Value, Inputs, Level 2		Dec. 31, 2013 International stock funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 International stock funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2013 Domestic bond funds		Dec. 31, 2012 Domestic bond funds		Dec. 31, 2013 Domestic bond funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 Domestic bond funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 Domestic bond funds Fair Value, Inputs, Level 2		Dec. 31, 2012 Domestic bond funds Fair Value, Inputs, Level 2		Dec. 31, 2013 Domestic bond funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 Domestic bond funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2013 International bond funds		Dec. 31, 2012 International bond funds		Dec. 31, 2013 International bond funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 International bond funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 International bond funds Fair Value, Inputs, Level 2		Dec. 31, 2012 International bond funds Fair Value, Inputs, Level 2		Dec. 31, 2013 International bond funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 International bond funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2013 Real Estate		Dec. 31, 2012 Real Estate		Dec. 31, 2013 Real Estate Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 Real Estate Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 Real Estate Fair Value, Inputs, Level 2		Dec. 31, 2012 Real Estate Fair Value, Inputs, Level 2		Dec. 31, 2013 Real Estate Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 Real Estate Significant Unobservable Inputs (Level 3)		Dec. 31, 2011 Real Estate Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 Multi-strategy Funds		Dec. 31, 2012 Multi-strategy Funds		Dec. 31, 2013 Multi-strategy Funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2012 Multi-strategy Funds Quoted Prices in Active Markets for Identical Assets (Level 1)		Dec. 31, 2013 Multi-strategy Funds Fair Value, Inputs, Level 2		Dec. 31, 2012 Multi-strategy Funds Fair Value, Inputs, Level 2		Dec. 31, 2013 Multi-strategy Funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2012 Multi-strategy Funds Significant Unobservable Inputs (Level 3)		Dec. 31, 2011 Multi-strategy Funds Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 Cash and Cash Equivalents	Dec. 31, 2012 Cash and Cash Equivalents	Dec. 31, 2013 Cash and Cash Equivalents Quoted Prices in Active Markets for Identical Assets (Level 1)	Dec. 31, 2012 Cash and Cash Equivalents Quoted Prices in Active Markets for Identical Assets (Level 1)	Dec. 31, 2013 Cash and Cash Equivalents Fair Value, Inputs, Level 2	Dec. 31, 2012 Cash and Cash Equivalents Fair Value, Inputs, Level 2	Dec. 31, 2013 Cash and Cash Equivalents Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 Cash and Cash Equivalents Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 270.3	$ 259.3	$ 247.1				$ 148.7	$ 101.1	$ 79.9	$ 93.5	$ 41.7	$ 64.7	$ 60.9	$ 11.1	[1]	$ 11.8	[1]	$ 11.1	[1]	$ 11.8	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 0	[1]	$ 83.0	[2]	$ 54.6	[2]	$ 68.8	[2]	$ 25.0	[2]	$ 14.2	[2]	$ 29.6	[2]	$ 0	[2]	$ 0	[2]	$ 42.4	[2]	$ 39.6	[2]	$ 14.4	[2]	$ 12.1	[2]	$ 28.0	[2]	$ 27.5	[2]	$ 0	[2]	$ 0	[2]	$ 54.4	[1]	$ 52.2	[2]	$ 54.4	[2]	$ 52.2	[2]	$ 0	[2]	$ 0	[2]	$ 0	[2]	$ 0	[2]	$ 34.2	[1]	$ 34.0	[1]	$ 0	[2]	$ 0	[2]	$ 34.2	[2]	$ 34.0	[2]	$ 0	[2]	$ 0	[2]	$ 16.5	[3]	$ 15.2	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 16.5	[3]	$ 15.2	[3]	$ 14.5	$ 25.2	[4]	$ 49.5	[4]	$ 0	[4]	$ 0	[4]	$ 0	[4]	$ 0	[4]	$ 25.2	[4]	$ 49.5	[4]	$ 46.4	$ 3.5	$ 2.4	$ 0	$ 0	$ 3.5	$ 2.4	$ 0	$ 0
Defined Benefit Plan, Benefits Paid	18.6	27.8				10.4
Maximum benefit amortization period	20 years
Approximate percentage of assets represented by most significant plans	80.00%
Approximate percentage of benefit obligations represented by most significant plans	82.00%
Rate of eligible compensation increase	4.00%
Trust assets, corporate owned life insurance policies	9.7	8.8
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	3.4	3.7	2.9
Interest cost	12.7	14.6	15.9
Expected return on plan assets	(16.5)	(16.8)	(18.2)
Amortization of prior service cost	0.3	0.3	0.3
Amortization of net actuarial loss	7.3	6.6	4.6
Net periodic pension cost	7.2	8.4	5.5
Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	3.80%	4.41%	5.12%
Rate of compensation increase	0.70%	0.70%	0.60%
Expected return on plan assets	6.64%	6.87%	7.04%
Other changes in plan assets and benefit obligations recognized in other comprehensive incom [Abstract]
Net actuarial (gain) loss	(35.9)	11.3	43.2
Amortization of net actuarial loss	(7.3)	(6.6)	(4.6)
Amortization of prior service cost	(0.3)	(0.3)	(0.3)
Settlement	0	(2.2)	0
Foreign exchange rate changes	0.2	0	(0.1)
Total recognized in OCI	(43.3)	2.2	38.2
Expected contribution to pension plans in 2012				2.0	5.0
Benefits Expected to be Paid from Benefit Plans [Abstract]
2014	18.8
2015	19.4
2016	28.3
2017	22.8
2018	19.6
2019 - 2023	$ 108.9

[1] Fixed income investments include investments in funds that are primarily invested in a diversified portfolio of investment grade U.S. and international debt securities.

[2] Equity investments include investments in funds that are primarily invested in large capitalization U.S. and international equity securities and a mutual fund.

[3] Real estate investments are primarily invested in U.S. commercial real estate.

[4] The multi-strategy funds invest in various hedge funds that employ a fund of funds strategy.