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Goodwill and Identifiable Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Identifiable intangible assets |  |  |
Gross Carrying Amount | $ 331.2 | $ 310.5 |
Accumulated Amortization | 152.2 | 124.8 |
Net | 179.0 | 185.7 |
Total intangible assets, Gross carrying value | 363.1 | 342.4 |
Total intangible assets, Net carrying value | 210.9 | 217.6 |
Intangible amortization expense | 28.3 | 29.1 | $ 22.4
Future estimated amortization of identifiable intangible assets |  |  |
2016 | 32.3 |  |
2017 | 27.5 |  |
2018 | 23.8 |  |
2019 | 19.6 |  |
2020 | 16.8 |  |
Thereafter | 59.0 |  |
Land Segment |  |  |
Identifiable intangible assets |  |  |
Total intangible assets, Net carrying value | 140.2 | 137.5 |
Aviation Segment |  |  |
Identifiable intangible assets |  |  |
Total intangible assets, Net carrying value | 64.7 | 72.9 |
Trademark/trade name rights |  |  |
Identifiable intangible assets |  |  |
Indefinite lived Intangible Assets | 31.9 | 31.9 |
Customer relationships |  |  |
Identifiable intangible assets |  |  |
Gross Carrying Amount | 255.5 | 243.1 |
Accumulated Amortization | 125.4 | 104.4 |
Net | 130.1 | 138.7 |
Supplier agreements |  |  |
Identifiable intangible assets |  |  |
Gross Carrying Amount | 38.5 | 33.7 |
Accumulated Amortization | 10.7 | 9.1 |
Net | 27.8 | 24.6 |
Other |  |  |
Identifiable intangible assets |  |  |
Gross Carrying Amount | 37.2 | 33.7 |
Accumulated Amortization | 16.1 | 11.3 |
Net | $ 21.1 | $ 22.4 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: 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=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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