Employee Benefit Plans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Percentage of Medical Coverage Cost Payable by Participants	100.00%
Contributions to defined contribution plans	$ 14,800,000	[1]	$ 13,700,000	[1]	$ 13,200,000	[1]
U.S.-based pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	88.00%
Plan assets	87.00%
Long-term rate of return on assets assumption	8.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.94%
Components of fair value in our plan assets	88.00%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense	6,500,000	[2]	11,800,000	[2]	20,500,000	[2]
Estimated prior service (cost) credits	(200,000)
Estimated actuarial gains (losses)	(10,300,000)
Long-term rate of return on assets assumption	8.00%		8.00%		8.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.04%		4.88%
U.S. non-qualified pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.30%
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense	(1,400,000)	[2]	(1,400,000)	[2]	(700,000)	[2]
Estimated prior service (cost) credits	2,800,000
Estimated actuarial gains (losses)	(1,400,000)
Long-term rate of return on assets assumption	0.00%		0.00%		0.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.23%		3.57%
Canadian Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Components of fair value in our plan assets	6.00%
United Kingdom Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Components of fair value in our plan assets	6.00%
Fixed income [Member] | United Kingdom Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average maturity period	5 years
Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined contribution plans	0		400,000		2,000,000
Pension expense	$ 0	[2]	$ 200,000	[2]	$ 6,900,000	[2]

[1] Contributions of $0.4 million and $2.0 million were included in Loss from discontinued operations for the years ended December 31, 2013 and 2012, respectively.

[2] Pension expense of $0.2 million and $6.9 million was included in Loss for discontinued operations for the years ended December 31, 2013 and 2012, respectively.