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Debt - Schedule of Long Term Debt (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands | Dec. 31, 2018 USD ($) | Dec. 31, 2018 AUD ($) | Mar. 27, 2018 AUD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 AUD ($) | Nov. 30, 2017 GBP (£) | Sep. 30, 2017 USD ($) | Aug. 21, 2017 USD ($) | May 31, 2017 EUR (€) | Sep. 30, 2016 CAD ($) | Sep. 28, 2016 AUD ($) | May 31, 2016 USD ($)
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Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 8,229,430 |  |  | $ 7,129,511 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (86,607) |  |  | (86,240) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 8,142,823 |  |  | 7,043,271 |  |  |  |  |  |  |  |
Debt, current portion | (126,406) |  |  | (146,300) |  |  |  |  |  |  |  |
Unamortized deferred financing costs, current portion | 0 |  |  | 0 |  |  |  |  |  |  |  |
Carrying amount, current portion | (126,406) |  |  | (146,300) |  |  |  |  |  |  |  |
Long-term debt, net of current portion | 8,103,024 |  |  | 6,983,211 |  |  |  |  |  |  |  |
Unamortized deferred financing costs | (86,607) |  |  | (86,240) |  |  |  |  |  |  |  |
Long-term debt, net of current portion | $ 8,016,417 |  |  | 6,896,971 |  |  |  |  |  |  |  |
Capital stock of subsidiaries pledged to secure debt (as a percent) | 66.00% | 66.00% |  |  |  |  |  |  |  |  |  |
Unamortized original issue discount | $ 3,271 |  |  |  |  |  |  |  |  |  |  |
Ownership in U.S. subsidiaries that are considered guarantor (as a percent) | 100.00% | 100.00% |  |  |  |  |  |  |  |  |  |
Capital lease obligations | $ 447,173 |  |  | 436,285 |  |  |  |  |  |  |  |
Revolving Credit Facility | New Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 793,832 |  |  | 466,593 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (14,117) |  |  | (14,407) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 779,715 |  |  | 452,186 |  |  |  |  |  |  |  |
Fair Value | 793,832 |  |  | 466,593 |  |  |  |  |  |  |  |
Revolving Credit Facility | UK Bilateral Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 178,299 |  |  | 0 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (2,357) |  |  | 0 |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 175,942 |  |  | 0 |  |  |  |  |  |  |  |
Fair Value | 178,299 |  |  | 0 |  |  |  |  |  |  |  |
Term Loan Facility | New Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) |  |  |  |  |  |  |  | $ 250,000 |  |  |  |
Term Loan Facility | Term Loan A |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 240,625 |  |  | 243,750 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | 0 |  |  | 0 |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 240,625 |  |  | 243,750 |  |  |  |  |  |  |  |
Fair Value | 240,625 |  |  | 243,750 |  |  |  |  |  |  |  |
Term Loan Facility | Term Loan B |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 693,169 |  |  | 0 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (8,742) |  |  | 0 |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 684,427 |  |  | 0 |  |  |  |  |  |  |  |
Fair Value | 660,013 |  |  | 0 |  |  |  |  |  |  |  |
Unamortized original issue discount | 1,581 |  |  |  |  |  |  |  |  |  |  |
Australian Dollar Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 233,955 |  | $ 350,000 | 187,504 |  |  |  |  |  |  | $ 250,000 |
Unamortized Deferred Financing Costs | (3,084) |  |  | (3,382) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 230,871 |  |  | 184,122 |  |  |  |  |  |  |  |
Fair Value | 235,645 | $ 334,063 |  | 189,049 | $ 242,188 |  |  |  |  |  |  |
Unamortized original issue discount | 1,690 |  |  | 1,545 |  |  |  |  |  |  |  |
Senior Notes 4.375 Percent due 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 500,000 |  |  | 500,000 |  |  |  |  |  |  |  | $ 500,000
Unamortized Deferred Financing Costs | (4,155) |  |  | (5,874) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 495,845 |  |  | 494,126 |  |  |  |  |  |  |  |
Fair Value | $ 488,750 |  |  | 507,500 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.375% | 4.375% |  |  |  |  |  |  |  |  |  |
Senior Notes 6 Percent Due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 600,000 |  |  | 600,000 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (5,126) |  |  | (6,224) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 594,874 |  |  | 593,776 |  |  |  |  |  |  |  |
Fair Value | $ 606,000 |  |  | 625,500 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 6.00% | 6.00% |  |  |  |  |  |  |  |  |  |
CAD 5.375 Percent Senior Notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 183,403 |  |  | 199,171 |  |  |  |  |  | $ 250,000 |  |
Unamortized Deferred Financing Costs | (2,506) |  |  | (3,295) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 180,897 |  |  | 195,876 |  |  |  |  |  |  |  |
Fair Value | $ 186,154 |  |  | 208,631 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 5.375% | 5.375% |  |  |  |  |  |  |  |  |  |
Senior Subordinated Notes 5.75 Percent due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 1,000,000 |  |  | 1,000,000 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (7,782) |  |  | (9,156) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 992,218 |  |  | 990,844 |  |  |  |  |  |  |  |
Fair Value | $ 940,000 |  |  | 1,012,500 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 5.75% | 5.75% |  |  |  |  |  |  |  |  |  |
Euro Notes 3 Percent due 2025 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 343,347 |  |  | 359,386 |  |  |  |  | € 300,000 |  |  |
Unamortized Deferred Financing Costs | (4,098) |  |  | (4,691) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 339,249 |  |  | 354,695 |  |  |  |  |  |  |  |
Fair Value | $ 321,029 |  |  | 364,776 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |
GBP Notes due 2025 3.875 Percent |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 509,425 |  |  | 539,702 |  | £ 400,000 |  |  |  |  |  |
Unamortized Deferred Financing Costs | (6,573) |  |  | (7,718) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 502,852 |  |  | 531,984 |  |  |  |  |  |  |  |
Fair Value | $ 453,811 |  |  | 527,559 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 3.875% | 3.875% |  |  |  |  |  |  |  |  |  |
Senior Notes 5.375 Percent due 2026 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 250,000 |  |  | 250,000 |  |  |  |  |  |  |  | $ 250,000
Unamortized Deferred Financing Costs | (3,185) |  |  | (3,615) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 246,815 |  |  | 246,385 |  |  |  |  |  |  |  |
Fair Value | $ 224,375 |  |  | 256,875 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 5.375% | 5.375% |  |  |  |  |  |  |  |  |  |
Senior Notes 4.875 Percent due 2027 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 1,000,000 |  |  | 1,000,000 |  |  | $ 1,000,000 |  |  |  |  |
Unamortized Deferred Financing Costs | (12,442) |  |  | (13,866) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 987,558 |  |  | 986,134 |  |  |  |  |  |  |  |
Fair Value | $ 855,000 |  |  | 1,000,000 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.875% | 4.875% |  |  |  |  |  |  |  |  |  |
Senior Notes due 2028 5.25 Percent |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 825,000 |  |  | 825,000 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (10,923) |  |  | (11,817) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 814,077 |  |  | 813,183 |  |  |  |  |  |  |  |
Fair Value | $ 713,625 |  |  | 826,031 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 5.25% | 5.25% |  |  |  |  |  |  |  |  |  |
Real Estate Mortgages, Capital Leases and Other |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | $ 606,702 |  |  | 649,432 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (171) |  |  | (566) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 606,531 |  |  | 648,866 |  |  |  |  |  |  |  |
Fair Value | 606,702 |  |  | 649,432 |  |  |  |  |  |  |  |
Accounts Receivable Securitization Program |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 221,673 |  |  | 258,973 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (218) |  |  | (356) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 221,455 |  |  | 258,617 |  |  |  |  |  |  |  |
Fair Value | 221,673 |  |  | 258,973 |  |  |  |  |  |  |  |
Mortgage Securitization Program |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt (inclusive of discount) | 50,000 |  |  | 50,000 |  |  |  |  |  |  |  |
Unamortized Deferred Financing Costs | (1,128) |  |  | (1,273) |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | 48,872 |  |  | 48,727 |  |  |  |  |  |  |  |
Fair Value | $ 50,000 |  |  | 50,000 |  |  |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capital stock of subsidiaries pledged to secure debt (as a percent) | 66.00% | 66.00% |  |  |  |  |  |  |  |  |  |
Mortgages |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | $ 18,576 |  |  | $ 20,183 |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.10% | 4.10% |  | 4.30% | 4.30% |  |  |  |  |  |  |
Capital Lease Obligations |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) | 5.70% | 5.70% |  | 4.90% | 4.90% |  |  |  |  |  |  |
Other Notes And Obligations |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Long-term Debt (including current portion) | $ 140,953 |  |  | $ 192,964 |  |  |  |  |  |  |  |
Weighted average interest rate (as a percent) | 11.10% | 11.10% |  | 11.20% | 11.20% |  |  |  |  |  |  |

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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