Employee Benefit Plans (Details 2) (USD $) In Millions, unless otherwise specified						12 Months Ended					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Pension Plans, Defined Benefit [Member]	Dec. 31, 2010 Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Private Equity Funds [Member]		Dec. 31, 2011 Private Equity Funds [Member]		Dec. 31, 2012 Private Equity Funds [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2011 Private Equity Funds [Member] Fair Value, Inputs, Level 1 [Member]		Dec. 31, 2012 Private Equity Funds [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2011 Private Equity Funds [Member] Fair Value, Inputs, Level 2 [Member]		Dec. 31, 2012 Private Equity Funds [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2011 Private Equity Funds [Member] Fair Value, Inputs, Level 3 [Member]		Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Common Stock [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Common Stock [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Common Stock [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Common Stock [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Common Stock [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Equity Funds [Member]	Dec. 31, 2011 Equity Funds [Member]	Dec. 31, 2012 Equity Funds [Member] United States Pension Plans of US Entity, Defined Benefit [Member]	Dec. 31, 2012 Equity Funds [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2011 Equity Funds [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2012 Equity Funds [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Equity Funds [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Equity Funds [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2011 Equity Funds [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Fixed Income Funds [Member] United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year						$ 0.2
Defined Benefit Plan, Actual Plan Asset Allocations																																							62.00%							38.00%
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	171.7	140.4	171.7	140.4	134.1		4.7	3.7	162.7	132.8	3.9	3.4	162.7	[1]	132.8	[1]	0	[1]	0	[1]	162.7	[1]	132.8	[1]	0	[1]	0	[1]	4.7	3.7	4.7	3.7	0	0	0	0	4.3	3.9		0	0	0	0	4.3	3.9
Unrealized gains relating to instruments still held at the reporting date											0.4	0.4
Purchases											0	0.1
Fair value of plan assets at end of year	$ 171.7	$ 140.4	$ 171.7	$ 140.4	$ 134.1		$ 4.7	$ 3.7	$ 162.7	$ 132.8	$ 4.3	$ 3.9	$ 162.7	[1]	$ 132.8	[1]	$ 0	[1]	$ 0	[1]	$ 162.7	[1]	$ 132.8	[1]	$ 0	[1]	$ 0	[1]	$ 4.7	$ 3.7	$ 4.7	$ 3.7	$ 0	$ 0	$ 0	$ 0	$ 4.3	$ 3.9		$ 0	$ 0	$ 0	$ 0	$ 4.3	$ 3.9
Assets expected to be returned to the Company during 2012						0

[1] For additional information on the fair value hierarchy, see Note 13.