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Restructuring Charges (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring charges | $ 59,600,000 | $ 59,600,000 | $ 0 | $ 0
Restructuring charges included in accrued expenses and other current liabilities | 32,000,000.0 | 32,000,000.0 |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business line exit costs | 50,300,000 |  |  |
Employee and facility-related | 9,400,000 |  |  |
Restructuring charges | 59,600,000 | 59,600,000 | $ 0 | $ 0
Corporate |  |  |  |
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring charges | 5,100,000 |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business line exit costs | 0 |  |  |
Employee and facility-related | 5,100,000 |  |  |
Restructuring charges | 5,100,000 |  |  |
Aviation segment | Operating Segments |  |  |  |
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring charges | 900,000 |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business line exit costs | 0 |  |  |
Employee and facility-related | 900,000 |  |  |
Restructuring charges | 900,000 |  |  |
Land segment | Operating Segments |  |  |  |
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring charges | 52,400,000 | 52,400,000 |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business line exit costs | 50,300,000 |  |  |
Employee and facility-related | 2,100,000 |  |  |
Restructuring charges | 52,400,000 | 52,400,000 |  |
Marine segment | Operating Segments |  |  |  |
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring charges | 1,400,000 | 1,400,000 |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Business line exit costs | 0 |  |  |
Employee and facility-related | 1,400,000 |  |  |
Restructuring charges | 1,400,000 | $ 1,400,000 |  |
Write off of notes due |  |  |  |
Restructuring and Related Activities [Abstract] |  |  |  |
Restructuring charges | 26,000,000.0 |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 26,000,000.0 |  |  |

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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