Debt (Detail) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Principal amount	$ 4,012,382	$ 3,732,583
Long-term debt issuance cost	40,445	46,534
Long-term debt, current maturities	405,390	178,364
Long-term debt, excluding current maturities	$ 3,566,547	3,507,685
Revolving Loan Facility
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	2.99%
Principal amount	$ 211,000	0
Term Loan A
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	2.95%
Principal amount	$ 605,625	655,469
Term Loan B
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	3.74%
Principal amount	$ 318,625	318,625
Australian Term A-1 Loan Facility
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	3.15%
Principal amount	$ 156,974	143,544
Australian Term A-2 Loan Facility
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	0.00%
Principal amount	$ 0	143,544
4.875% Senior Notes
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	4.875%
Principal amount	$ 900,000	900,000
4.625% Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	4.625%
Principal amount	$ 900,000	900,000
3.50% Senior Notes
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	3.50%
Principal amount	$ 587,268	520,617
European Revolving Loan Facility
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	1.50%
Principal amount	$ 79,868	62,474
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Interest rate as of September 30, 2017	2.12%
Principal amount	$ 250,995	44,521
Other International Debt
Debt Instrument [Line Items]
Principal amount	$ 2,027	$ 43,789
Debt Instrument, Interest Rate Terms	Various

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
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