Borrowings (Additional Information) (Detail)		9 Months Ended
	Jun. 23, 2015 USD ($)	Sep. 30, 2015 USD ($) covenant	Dec. 31, 2014 USD ($)	Dec. 31, 2011
Line of Credit Facility [Line Items]
Applicable margin over LIBOR		1.10%
Number of financial covenants | covenant		2
2.58% Senior Euro Notes, due June 2015
Line of Credit Facility [Line Items]
Stated interest rate		2.58%
4.5% Senior Notes, due December 2020
Line of Credit Facility [Line Items]
Stated interest rate				4.50%
4.2% Senior Notes, due December 2021
Line of Credit Facility [Line Items]
Stated interest rate				4.20%
Minimum
Line of Credit Facility [Line Items]
Applicable margin over LIBOR		0.91%
Minimum | Other borrowings
Line of Credit Facility [Line Items]
Stated interest rate		0.20%
Minimum | 2.58% Senior Euro Notes, due June 2015
Line of Credit Facility [Line Items]
Interest coverage ratio		3.0
Maximum
Line of Credit Facility [Line Items]
Applicable margin over LIBOR		1.50%
Maximum | Other borrowings
Line of Credit Facility [Line Items]
Stated interest rate		1.10%
Revolving Facility
Line of Credit Facility [Line Items]
Current borrowings under revolving facility		$ 203,000,000	$ 115,000,000
Outstanding letters of credit		7,300,000
Revolving Facility, amount available to borrow		$ 489,700,000
Revolving Facility | Maximum
Line of Credit Facility [Line Items]
Leverage ratio		3.50
Other borrowings
Line of Credit Facility [Line Items]
Other borrowings		$ 1,750,000	$ 2,170,000
Existing Credit Agreement
Line of Credit Facility [Line Items]
Expiration period		5 years
Revolving facility principal amount		$ 700,000,000
Expiration date		Jun. 27, 2016
Credit Agreement
Line of Credit Facility [Line Items]
Expiration date	Jun. 23, 2020
Borrowing capacity	$ 700,000,000
Extension period	1 year
Aggregate lending commitments	$ 350,000,000
Credit Agreement | Maximum
Line of Credit Facility [Line Items]
Leverage ratio		3.50
Credit Agreement | Letters Of Credit
Line of Credit Facility [Line Items]
Borrowing capacity	75,000,000
Credit Agreement | Swing line Loans
Line of Credit Facility [Line Items]
Borrowing capacity	$ 50,000,000