Segment Data - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of geographic segments	3
Long-lived tangible assets in Europe	$ 1,288.8	$ 1,224.7	$ 1,210.7
Share of revenue from an individual country in net sales	Less than 10 percent
Switzerland [Member]
Segment Reporting Information [Line Items]
Long-lived tangible assets in Europe	198.7
US [Member]
Segment Reporting Information [Line Items]
Sales from United States region	$ 2,397.9	$ 2,418.2	$ 2,280.7