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Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Other revenues (excluded from ASC 606)	$ 111.3	$ 131.9	$ 204.8	$ 302.5
Revenue	9,459.4	10,150.8	18,138.2	19,332.2
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	1,064.5	1,168.5	2,142.6	2,361.1
EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	2,314.9	2,430.6	4,329.2	4,417.9
LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	907.6	761.6	1,783.7	1,591.3
North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	5,061.0	5,658.2	9,677.9	10,659.4
Aviation
Disaggregation of Revenue [Line Items]
Revenue	4,785.0	4,900.7	9,037.7	9,193.6
Aviation | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	340.8	363.6	705.2	755.6
Aviation | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	1,008.8	962.8	1,727.9	1,632.8
Aviation | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	614.6	477.2	1,160.3	967.4
Aviation | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	2,828.5	3,157.6	5,476.5	5,920.6
Land
Disaggregation of Revenue [Line Items]
Revenue	2,663.0	2,960.2	5,156.6	5,820.9
Land | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	4.1	0.8	9.0	1.9
Land | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	569.7	635.7	1,210.2	1,315.5
Land | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	149.6	156.3	288.5	340.6
Land | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	1,884.6	2,142.6	3,519.0	4,100.9
Marine
Disaggregation of Revenue [Line Items]
Revenue	2,011.4	2,289.9	3,943.9	4,317.7
Marine | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	719.5	804.1	1,428.4	1,603.6
Marine | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	736.3	832.2	1,391.1	1,469.6
Marine | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	143.4	128.1	334.9	283.3
Marine | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	$ 347.9	$ 358.0	$ 682.4	$ 637.9

X

- Definition

Other Revenue

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-Section S99
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