Employee Benefit Plans (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Percentage of Medical Coverage Cost Payable by Participants	100.00%
Contributions to defined contribution plans	$ 13,200,000	[1]	$ 14,300,000	[1]	$ 13,600,000	[1]
Over funded amount included in Non Current Pension Liability			0
Percentage of fixed income invest in inflation indexed bonds	80.00%
U.S.-based pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	88.00%
Plan assets	89.00%
Long-term rate of return on assets assumption	8.00%
Discount rate assumption	4.02%
Components of fair value in our plan assets	89.00%
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense	20,500,000	[2]	13,300,000	[2]	10,100,000	[2]
Estimated prior service (cost) credits	(500,000)
Estimated actuarial gains (losses)	(10,500,000)
Long-term rate of return on assets assumption	8.00%		8.00%		8.00%
Discount rate assumption	3.97%		4.83%
U.S. non-qualified pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate assumption	3.46%
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense	(700,000)	[2]	1,000,000	[2]	700,000	[2]
Estimated prior service (cost) credits	3,100,000
Estimated actuarial gains (losses)	(1,500,000)
Long-term rate of return on assets assumption	0.00%		0.00%		0.00%
Discount rate assumption	2.72%		4.64%
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	5.00%
Loss from Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined contribution plans	2,000,000		2,700,000		3,300,000
Pension expense	$ 6,900,000	[2]	$ 800,000	[2]	$ 800,000	[2]
Fixed income [Member] | United Kingdom Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average maturity period	5 years
Fixed income [Member] | Minimum [Member] | U.S.-based pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average maturity period	7 years
Fixed income [Member] | Maximum [Member] | U.S.-based pension plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average maturity period	20 years

[1] Contributions of $2.0 million, $2.7 million and $3.3 million are included in Loss for discontinued operations for the years ended December 31, 2012, 2011 and 2010 respectively.

[2] Pension expense of $6.9 million, $0.8 million and $0.8 million is included in Loss for discontinued operations for the years ended December 31, 2012, 2011 and 2010 respectively.