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Pension Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended					12 Months Ended							12 Months Ended
	Jun. 30, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2013 United Kingdom Government Gilts [Member]	Dec. 31, 2012 United Kingdom Government Gilts [Member]	Dec. 31, 2013 Debt Securities [Member]	Dec. 31, 2013 Equity Securities [Member]	Dec. 31, 2013 United Kingdom Plan [Member]	Dec. 31, 2012 United Kingdom Plan [Member]	Dec. 31, 2011 United Kingdom Plan [Member]	Dec. 31, 2013 United Kingdom Plan [Member] Index-Tracking Funds [Member]	Dec. 31, 2012 United Kingdom Plan [Member] Index-Tracking Funds [Member]	Dec. 31, 2013 United Kingdom Plan [Member] Debt Securities [Member]	Dec. 31, 2012 United Kingdom Plan [Member] Debt Securities [Member]	Dec. 31, 2011 United Kingdom Plan [Member] Debt Securities [Member]	Dec. 31, 2013 United Kingdom Plan [Member] Equity Securities [Member]	Dec. 31, 2012 United Kingdom Plan [Member] Equity Securities [Member]	Dec. 31, 2011 United Kingdom Plan [Member] Equity Securities [Member]	Dec. 31, 2013 German Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Retirement age of service		65 years
Reduced in Projected Benefit Obligation (PBO)	$ 17.1
Remaining life expectancy of Plan pensioners				15 years
Average remaining life expectancy of the inactive participants		24 years
Annual cash contribution		11
Percentage change in discount rate		0.25%
Amount change in PBO due to discount rate		28
Amount change in net pension charge due to discount rate		0.5
Amount change in PBO due to change price inflation		22
Amount change in net pension charge due to change price inflation		1.7
Percentage change in price inflation		0.25%
Percentage of asset allocation, actual					25.00%	25.00%						55.00%	55.00%
Asset allocation							65.00%	35.00%	100.00%	100.00%	100.00%			61.00%	61.00%	66.00%	35.00%	33.00%	29.00%
Maximum percentage of Plan's assets invested in individual company's investment funds		5.00%
Accumulated benefit obligation for the Plan		819.8	805.3
Amount of unrecognized actuarial net losses																				1.6
Amount of unrecognized actuarial net losses, net of tax																				0.6
Amount of contributions to defined contribution schemes		$ 7.7	$ 7.4

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Amount of contributions to defined contribution schemes.

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Annual cash contribution.

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Average Remaining Life Expectancy Of Inactive Participants

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Defined benefit plan benefit obligation period decrease due to pension increase exchange program.

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Defined benefit plan benefit prior service credit amortization period.

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Definite benefit plan employee retirement age.

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Definite benefit plan expected change in discount rate.

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Definite benefit plan expected change project benefit obligation due to discount rate change.

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Definite benefit plan expected change project benefit obligation due to inflation rate change.

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Definite benefit plan expected net pension cost due change in discount rate.

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Definite benefit plan expected net pension cost due change in inflation rate.

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Maximum Percent of investment in individual securities.

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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-Publisher FASB

-Name Accounting Standards Codification

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The interest rate used to adjust for the time value of money for the plan.

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Target allocation of investments of this type to total plan assets presented on a weighted average basis.

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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

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Amount after tax of (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

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Amount of tax expense (benefit) related to (increase) decrease in the value of the projected benefit obligation related to a change in an actuarial assumption and increase (decrease) in the value of the plan assets resulting from experience different from that assumed, that has not been recognized in net periodic benefit (cost) credit.

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