Borrowings - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended		1 Months Ended	12 Months Ended		0 Months Ended
	Mar. 31, 2008	Mar. 31, 2014 Agreement	Dec. 31, 2014	Sep. 27, 2007	Jul. 12, 2013	Jul. 31, 2009	Dec. 31, 2011	Dec. 31, 2006	Apr. 04, 2013	Apr. 04, 2014	Dec. 31, 2013	Nov. 09, 2011	Dec. 31, 2012
Schedule Of Borrowings [Line Items]
Revolving credit facility										$ 950,000,000
Percentage of aggregate commitments			50.00%
Borrowing terms under new facility			Borrowings under the Credit Facility bear interest at an annual rate of LIBOR plus a margin, currently 112.5 bps, linked to our credit rating.
Covenant terms under new facility			The New Facility contains various affirmative and negative covenants, including the requirement for us to maintain, at the end of each fiscal quarter, a ratio of net debt for borrowed money to adjusted EBITDA (Earnings Before Interest, Taxes, Depreciation and Amortization) in respect of the previous 12-month period of not more than 3.25 to 1.
Ratio of net debt												3.25
Amount still available for additional borrowings			940,400,000
Long-term debt			934,232,000								932,665,000
Current portion of long-term debt			8,090,000								149,000
Bank overdrafts outstanding			3,000,000								72,400,000
Weighted average interest rate of bank loans			4.13%								0.35%
Average interest rate on outstanding borrowings											1.50%
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			0
Maturities on debt outstanding, 2015			0
Number of interest rate swap agreements		3
Realized gain on termination of interest rate swap	18,000,000
Maximum [Member]
Schedule Of Borrowings [Line Items]
Commercial paper term, in days			30 days
Number of one-year periods may be extended												2
Bank overdrafts outstanding			8,000,000								296,000,000		297,000,000
Senior Notes - 2007 [Member]
Schedule Of Borrowings [Line Items]
Senior notes				500,000,000
Interest rate of debt			6.40%
Debt Instrument, Fair Value Disclosure			588,000,000
Senior Notes - 2007 [Member] | Series A Senior Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes				250,000,000
Interest rate of debt				6.25%
Debt Instrument, Maturity Date				Sep. 27, 2017
Senior Notes - 2007 [Member] | Series B Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes				100,000,000
Interest rate of debt				6.35%
Debt Instrument, Maturity Date				Sep. 27, 2019
Senior Notes - 2007 [Member] | Series C Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes				50,000,000
Interest rate of debt				6.50%
Debt Instrument, Maturity Date				Sep. 27, 2022
Senior Notes - 2007 [Member] | Series D Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes				100,000,000
Interest rate of debt				6.79%
Debt Instrument, Maturity Date				Sep. 27, 2027
Senior Notes - 2006 [Member]
Schedule Of Borrowings [Line Items]
Senior notes								375,000,000
Interest rate of debt			6.14%
Repayment of debt					100,000,000	50,000,000	100,000,000
Debt Instrument, Fair Value Disclosure											133,000,000
Senior Notes - 2006 [Member] | Series A Senior Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes								50,000,000
Interest rate of debt								5.89%
Debt Instrument, Maturity Date								Jul. 12, 2009
Senior Notes - 2006 [Member] | Series B Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes								100,000,000
Interest rate of debt								5.96%
Debt Instrument, Maturity Date								Jul. 12, 2011
Senior Notes - 2006 [Member] | Series C Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes								100,000,000
Interest rate of debt								6.05%
Debt Instrument, Maturity Date								Jul. 12, 2013
Senior Notes - 2006 [Member] | Series D Notes [Member]
Schedule Of Borrowings [Line Items]
Senior notes								125,000,000
Interest rate of debt								6.14%
Debt Instrument, Maturity Date								Jul. 12, 2016
Senior Notes - 2013 [Member]
Schedule Of Borrowings [Line Items]
Senior notes									300,000,000.0
Interest rate of debt			3.20%						3.20%
Senior notes discount									300,000
Proceeds related to the issuance of Senior Notes									297,800,000
Underwriting discount									1,900,000
Other deferred financing costs									900,000
Senior notes interest payable description									interest payable on May 1 and November 1 of each year
Debt Instrument, Maturity Date									May 01, 2023
Notice to holders of the Senior Notes									Upon 30 days’ notice to holders of the Senior Notes - 2013, the Company may redeem the Senior Notes - 2013 for cash in whole
Redemptions of the Senior Notes									redemptions of the Senior Notes - 2013 on or after February 1, 2023
Repurchase price of principal amount of Senior Notes in percentage									101.00%
Debt Instrument, Fair Value Disclosure													296,000,000
Senior Notes [Member]
Schedule Of Borrowings [Line Items]
Maturities on debt outstanding, 2015			125,000,000
Maturities on debt outstanding, 2016			250,000,000
Maturities on debt outstanding, 2018			100,000,000
Maturities on debt outstanding, 2019 and thereafter			450,000,000
Deferred realized gains on interest rate swaps [Member]
Schedule Of Borrowings [Line Items]
Deferred realized gains on interest rate swaps			5,205,000								7,094,000
London Interbank Offered Rate (LIBOR) [Member]
Schedule Of Borrowings [Line Items]
Margin on variable rate			1.25%
Tranche A [Member]
Schedule Of Borrowings [Line Items]
Revolving credit facility										456,000,000
Tranche A [Member] | Letter of credit [Member]
Schedule Of Borrowings [Line Items]
Revolving credit facility										25,000,000
Tranche B [Member]
Schedule Of Borrowings [Line Items]
Revolving credit facility										$ 494,000,000