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Debt Schedule of Long Term Debt (Details) $ in Thousands, $ in Thousands	Sep. 30, 2018 USD ($)	Sep. 30, 2018 AUD ($)	Mar. 27, 2018 AUD ($)	Dec. 31, 2017 USD ($)	Sep. 28, 2016 AUD ($)
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 8,321,365			$ 7,129,511
Unamortized Debt Issuance Expense	(90,491)			(86,240)
Long-term Debt	8,230,874			7,043,271
Long-term Debt, Gross, Current Maturities	(121,695)			(146,300)
Unamortized Debt Issuance Expense, Current	0			0
Long-term Debt, Current Maturities	(121,695)			(146,300)
Long Term Debt, Gross, Net of Current Portion	8,199,670			6,983,211
Unamortized Debt Issuance Expense, Net	(90,491)			(86,240)
Long-term Debt, Excluding Current Maturities	8,109,179			6,896,971
Senior Notes 4.375 Percent due 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	500,000			500,000
Fair Value	$ 500,000			$ 507,500
Stated interest rate (as a percent)	4.375%	4.375%		4.375%
Unamortized Debt Issuance Expense	$ (4,585)			$ (5,874)
Long-term Debt	$ 495,415			494,126
Australian Dollar Term Loan [Member]
Debt Instrument [Line Items]
Average interest rate (as a percent)	5.90%	5.90%
Debt Instrument, Unamortized Discount	$ 1,845			1,545
Long-term Debt, Gross	240,970		$ 350,000	187,504	$ 250,000
Fair Value	242,815			189,049
Unamortized Debt Issuance Expense	(3,201)			(3,382)
Long-term Debt	237,769	$ 336,250		184,122
6% Notes
Debt Instrument [Line Items]
Long-term Debt, Gross	600,000			600,000
Fair Value	$ 615,000			$ 625,500
Stated interest rate (as a percent)	6.00%	6.00%		6.00%
Unamortized Debt Issuance Expense	$ (5,400)			$ (6,224)
Long-term Debt	594,600			593,776
CAD 5.375 Percent Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	193,766			199,171
Fair Value	$ 193,766			$ 208,631
Stated interest rate (as a percent)	5.375%	5.375%		5.375%
Unamortized Debt Issuance Expense	$ (2,787)			$ (3,295)
Long-term Debt	190,979			195,876
The 5 3/4% Notes
Debt Instrument [Line Items]
Long-term Debt, Gross	1,000,000			1,000,000
Fair Value	$ 990,000			$ 1,012,500
Stated interest rate (as a percent)	5.75%	5.75%		5.75%
Unamortized Debt Issuance Expense	$ (8,126)			$ (9,156)
Long-term Debt	991,874			990,844
Euro Notes 3 Percent due 2025 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	348,140			359,386
Fair Value	$ 342,483			$ 364,776
Stated interest rate (as a percent)	3.00%	3.00%		3.00%
Unamortized Debt Issuance Expense	$ (4,257)			$ (4,691)
Long-term Debt	343,883			354,695
GBP Notes due 2025 3.875 Percent [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	521,173			539,702
Fair Value	$ 495,380			$ 527,559
Stated interest rate (as a percent)	3.875%	3.875%		3.875%
Unamortized Debt Issuance Expense	$ (6,742)			$ (7,718)
Long-term Debt	514,431			531,984
Senior Notes 5.375 Percent due 2026
Debt Instrument [Line Items]
Long-term Debt, Gross	250,000			250,000
Fair Value	$ 235,938			$ 256,875
Stated interest rate (as a percent)	5.375%	5.375%		5.375%
Unamortized Debt Issuance Expense	$ (3,293)			$ (3,615)
Long-term Debt	246,707			246,385
Senior Notes 4.875 Percent due 2027
Debt Instrument [Line Items]
Long-term Debt, Gross	1,000,000			1,000,000
Fair Value	$ 917,500			$ 1,000,000
Stated interest rate (as a percent)	4.875%	4.875%		4.875%
Unamortized Debt Issuance Expense	$ (12,797)			$ (13,866)
Long-term Debt	987,203			986,134
Senior Notes due 2028 5.25 Percent [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	825,000			825,000
Fair Value	$ 765,188			$ 826,031
Stated interest rate (as a percent)	5.25%	5.25%		5.25%
Unamortized Debt Issuance Expense	$ (11,216)			$ (11,817)
Long-term Debt	$ 813,784			813,183
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Average interest rate (as a percent)	3.00%	3.00%
Long-term Debt, Gross	$ 238,273			258,973
Fair Value	238,273			258,973
Unamortized Debt Issuance Expense	(253)			(356)
Long-term Debt	238,020			258,617
Real Estate Mortgages, Capital Leases and Other
Debt Instrument [Line Items]
Long-term Debt, Gross	611,549			649,432
Fair Value	611,549			649,432
Unamortized Debt Issuance Expense	(237)			(566)
Long-term Debt	$ 611,312			648,866
Mortgage Securitization Program [Member]
Debt Instrument [Line Items]
Average interest rate (as a percent)	3.50%	3.50%
Long-term Debt, Gross	$ 50,000			50,000
Fair Value	50,000			50,000
Unamortized Debt Issuance Expense	(1,164)			(1,273)
Long-term Debt	$ 48,836			48,727
New Credit Agreement
Debt Instrument [Line Items]
Average interest rate (as a percent)	3.60%	3.60%
New Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Average interest rate (as a percent)	3.60%	3.60%
Long-term Debt, Gross	$ 821,470			466,593
Fair Value	821,470			466,593
Unamortized Debt Issuance Expense	(14,902)			(14,407)
Long-term Debt	$ 806,568			452,186
Term Loan A [Member] | Term Loan Facility
Debt Instrument [Line Items]
Average interest rate (as a percent)	3.90%	3.90%
Long-term Debt, Gross	$ 243,750			243,750
Fair Value	243,750			243,750
Unamortized Debt Issuance Expense	0			0
Long-term Debt	$ 243,750			243,750
Term Loan B [Member] | Term Loan Facility
Debt Instrument [Line Items]
Average interest rate (as a percent)	4.00%	4.00%
Debt Instrument, Unamortized Discount	$ 1,637
Long-term Debt, Gross	694,863			0
Fair Value	690,406			0
Unamortized Debt Issuance Expense	(9,055)			0
Long-term Debt	$ 685,808			0
UK Bilateral Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate at Period End	3.00%	3.00%
Long-term Debt, Gross	$ 182,411			0
Fair Value	182,411			0
Unamortized Debt Issuance Expense	(2,476)			0
Long-term Debt	$ 179,935			$ 0

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