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Business Segments, Geographic Information, and Major Customers - Income Statement Items (Details) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Information concerning revenue, gross profit and income from operations by segment |  |  |  |  |  |  |  |  |  |  |
Number of reportable operating business segments | segment |  |  |  |  |  |  |  |  | 3 |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 9,988,600,000 | $ 10,429,500,000 | $ 10,150,800,000 | $ 9,181,300,000 | $ 8,872,000,000.0 | $ 8,543,000,000.0 | $ 8,086,200,000 | $ 8,194,300,000 | $ 39,750,300,000 | $ 33,695,500,000 | $ 27,015,800,000
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit | 262,200,000 | $ 266,700,000 | $ 246,200,000 | $ 243,400,000 | 229,900,000 | $ 239,900,000 | $ 231,000,000.0 | $ 231,400,000 | 1,018,500,000 | 932,200,000 | 899,000,000.0
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 259,700,000 | 45,600,000 | 188,900,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 81,500,000 | 86,000,000.0 | 82,300,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 72,300,000 | 54,000,000.0 | 37,700,000
Restructuring charges | 17,100,000 |  |  |  | $ 59,600,000 |  |  |  |  | 59,600,000 | 0
Impairment of intangible assets |  |  |  |  |  |  |  |  | 0 |  |
Operating Segments |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 336,300,000 | 127,200,000 | 261,500,000
Corporate |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | (76,600,000) | (81,600,000) | (72,700,000)
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 5,300,000 | 3,500,000 | 4,400,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 18,800,000 | 19,100,000 | 14,500,000
Restructuring charges | 4,500,000 |  |  |  |  |  |  |  |  |  |
Aviation segment |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 19,119,700,000 | 14,538,200,000 | 10,914,400,000
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 507,800,000 | 440,500,000 | 401,000,000.0
Aviation segment | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 250,600,000 | 192,900,000 | 160,500,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 27,500,000 | 26,800,000 | 24,200,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 19,700,000 | 12,300,000 | 4,900,000
Restructuring charges | 1,600,000 |  |  |  |  |  |  |  |  |  |
Land segment |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 11,381,100,000 | 10,958,000,000.0 | 8,918,800,000
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 364,900,000 | 365,800,000 | 348,500,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 17,100,000 | 52,400,000 |
Impairment of intangible assets |  |  |  |  |  |  |  |  |  | 12,800,000 |
Land segment | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 47,800,000 | (7,900,000) | 70,800,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 46,500,000 | 49,800,000 | 47,100,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | 30,900,000 | 21,000,000.0 | 12,300,000
Restructuring charges | 6,500,000 |  |  |  |  |  |  |  |  |  |
Marine segment |  |  |  |  |  |  |  |  |  |  |
Revenue: |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 9,249,500,000 | 8,199,300,000 | 7,182,500,000
Gross profit: |  |  |  |  |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |  |  | 145,800,000 | 126,000,000.0 | 149,500,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 1,400,000 |
Goodwill impairment and intangible asset impairment |  |  |  |  |  |  |  |  |  | 79,100,000 |
Marine segment | Operating Segments |  |  |  |  |  |  |  |  |  |  |
Income from operations: |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | 37,800,000 | (57,800,000) | 30,200,000
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,200,000 | 5,800,000 | 6,600,000
Capital expenditures: |  |  |  |  |  |  |  |  |  |  |
Total capital expenditures |  |  |  |  |  |  |  |  | $ 2,900,000 | $ 1,500,000 | $ 6,100,000
Restructuring charges | $ 4,500,000 |  |  |  |  |  |  |  |  |  |

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