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Debt Schedule of Long Term Debt (Details) $ in Thousands, $ in Thousands | Jun. 30, 2018 USD ($) | Jun. 30, 2018 AUD ($) | Mar. 27, 2018 AUD ($) | Dec. 31, 2017 USD ($) | Sep. 28, 2016 AUD ($)
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | $ 8,177,420 |  |  | $ 7,129,511 |
Unamortized Debt Issuance Expense | (91,841) |  |  | (86,240) |
Long-term Debt | 8,085,579 |  |  | 7,043,271 |
Long-term Debt, Gross, Current Maturities | (123,818) |  |  | (146,300) |
Unamortized Debt Issuance Expense, Current | 0 |  |  | 0 |
Long-term Debt, Current Maturities | (123,818) |  |  | (146,300) |
Long Term Debt, Gross, Net of Current Portion | 8,053,602 |  |  | 6,983,211 |
Unamortized Debt Issuance Expense, Net | 91,841 |  |  | 86,240 |
Long-term Debt, Excluding Current Maturities | 7,961,761 |  |  | 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 | $ 496,250 |  |  | $ 507,500 |
Stated interest rate (as a percent) | 4.375% | 4.375% |  | 4.375% |
Unamortized Debt Issuance Expense | $ (5,015) |  |  | $ (5,874) |
Long-term Debt | $ 494,985 |  |  | 494,126 |
Australian Dollar Term Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Average interest rate (as a percent) | 6.00% | 6.00% |  |  |
Debt Instrument, Unamortized Discount | $ 2,011 |  |  | 1,545 |
Long-term Debt, Gross | 248,670 |  | $ 350,000 | 187,504 | $ 250,000
Fair Value | 250,681 |  |  | 189,049 |
Unamortized Debt Issuance Expense | (3,433) |  |  | (3,382) |
Long-term Debt | 245,237 | $ 338,438 |  | 184,122 |
6% Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 600,000 |  |  | 600,000 |
Fair Value | $ 613,500 |  |  | $ 625,500 |
Stated interest rate (as a percent) | 6.00% | 6.00% |  | 6.00% |
Unamortized Debt Issuance Expense | $ (5,675) |  |  | $ (6,224) |
Long-term Debt | 594,325 |  |  | 593,776 |
CAD 5.375 Percent Senior Notes due 2023 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 190,330 |  |  | 199,171 |
Fair Value | $ 191,519 |  |  | $ 208,631 |
Stated interest rate (as a percent) | 5.375% | 5.375% |  | 5.375% |
Unamortized Debt Issuance Expense | $ (2,875) |  |  | $ (3,295) |
Long-term Debt | 187,455 |  |  | 195,876 |
The 5 3/4% Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 1,000,000 |  |  | 1,000,000 |
Fair Value | $ 980,000 |  |  | $ 1,012,500 |
Stated interest rate (as a percent) | 5.75% | 5.75% |  | 5.75% |
Unamortized Debt Issuance Expense | $ (8,469) |  |  | $ (9,156) |
Long-term Debt | 991,531 |  |  | 990,844 |
Euro Notes 3 Percent due 2025 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 350,508 |  |  | 359,386 |
Fair Value | $ 346,582 |  |  | $ 364,776 |
Stated interest rate (as a percent) | 3.00% | 3.00% |  | 3.00% |
Unamortized Debt Issuance Expense | $ (4,419) |  |  | $ (4,691) |
Long-term Debt | 346,089 |  |  | 354,695 |
GBP Notes due 2025 3.875 Percent [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 528,296 |  |  | 539,702 |
Fair Value | $ 499,240 |  |  | $ 527,559 |
Stated interest rate (as a percent) | 3.875% | 3.875% |  | 3.875% |
Unamortized Debt Issuance Expense | $ (7,104) |  |  | $ (7,718) |
Long-term Debt | 521,192 |  |  | 531,984 |
Senior Notes 5.375 Percent due 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 250,000 |  |  | 250,000 |
Fair Value | $ 238,125 |  |  | $ 256,875 |
Stated interest rate (as a percent) | 5.375% | 5.375% |  | 5.375% |
Unamortized Debt Issuance Expense | $ (3,400) |  |  | $ (3,615) |
Long-term Debt | 246,600 |  |  | 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 | $ 921,250 |  |  | $ 1,000,000 |
Stated interest rate (as a percent) | 4.875% | 4.875% |  | 4.875% |
Unamortized Debt Issuance Expense | $ (13,153) |  |  | $ (13,866) |
Long-term Debt | 986,847 |  |  | 986,134 |
Senior Notes due 2028 5.25 Percent [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 825,000 |  |  | 825,000 |
Fair Value | $ 767,250 |  |  | $ 826,031 |
Stated interest rate (as a percent) | 5.25% | 5.25% |  | 5.25% |
Unamortized Debt Issuance Expense | $ (11,511) |  |  | $ (11,817) |
Long-term Debt | $ 813,489 |  |  | 813,183 |
Accounts Receivable Securitization Program |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Average interest rate (as a percent) | 3.00% | 3.00% |  |  |
Long-term Debt, Gross | $ 248,473 |  |  | 258,973 |
Fair Value | 248,473 |  |  | 258,973 |
Unamortized Debt Issuance Expense | (287) |  |  | (356) |
Long-term Debt | 248,186 |  |  | 258,617 |
Real Estate Mortgages, Capital Leases and Other |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Long-term Debt, Gross | 614,145 |  |  | 649,432 |
Fair Value | 614,145 |  |  | 649,432 |
Unamortized Debt Issuance Expense | (316) |  |  | (566) |
Long-term Debt | $ 613,829 |  |  | 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 | (1,200) |  |  | (1,273) |
Long-term Debt | $ 48,800 |  |  | 48,727 |
New Credit Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Average interest rate (as a percent) | 3.50% | 3.50% |  |  |
New Credit Agreement | Revolving Credit Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Average interest rate (as a percent) | 3.50% | 3.50% |  |  |
Long-term Debt, Gross | $ 828,567 |  |  | 466,593 |
Fair Value | 828,567 |  |  | 466,593 |
Unamortized Debt Issuance Expense | (15,617) |  |  | (14,407) |
Long-term Debt | $ 812,950 |  |  | 452,186 |
Term Loan A [Member] | Term Loan Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Average interest rate (as a percent) | 3.80% | 3.80% |  |  |
Long-term Debt, Gross | $ 246,875 |  |  | 243,750 |
Fair Value | 246,875 |  |  | 243,750 |
Unamortized Debt Issuance Expense | 0 |  |  | 0 |
Long-term Debt | $ 246,875 |  |  | 243,750 |
Term Loan B [Member] | Term Loan Facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Average interest rate (as a percent) | 3.80% | 3.80% |  |  |
Debt Instrument, Unamortized Discount | $ 1,694 |  |  |  |
Long-term Debt, Gross | 696,556 |  |  | 0 |
Fair Value | 686,031 |  |  | 0 |
Unamortized Debt Issuance Expense | (9,367) |  |  | 0 |
Long-term Debt | $ 687,189 |  |  | $ 0 |

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