Pension and Other Benefit Plans - Weighted-Average Assumed Discount Rate, Compensation Increases and Expected Long-Term Rate of Return on Plan Assets Used to Determine Net Pension Cost for US and International Plans (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.15%	4.85%
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.85%	4.25%	5.50%
Compensation increases	4.00%	4.00%	4.00%
Return on plan assets	7.25%	7.50%	7.50%
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.76%	4.38%	4.95%
Compensation increases	4.80%	4.83%	4.91%
Return on plan assets	7.50%	7.50%	7.50%