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Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Other Revenue									$ 559.0	$ 590.2	$ 994.3
Revenue	$ 9,988.6	$ 10,429.5	$ 10,150.8	$ 9,181.3	$ 8,872.0	$ 8,543.0	$ 8,086.2	$ 8,194.3	39,750.3	33,695.5	27,015.8
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									5,120.1	4,436.8	3,484.5
Revenue									5,537.2	4,923.0	4,271.1
EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									9,353.4	7,428.1	5,792.8
Revenue									9,721.9	7,553.3	6,018.6
LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									3,173.6	2,619.8	2,065.1
North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									21,544.2	18,620.6	14,679.1
Aviation segment
Disaggregation of Revenue [Line Items]
Revenue									19,119.7	14,538.2	10,914.4
Aviation segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									1,564.6	1,086.8	788.6
Aviation segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									3,641.4	2,532.1	1,587.8
Aviation segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									1,931.6	1,365.5	985.5
Aviation segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									12,025.7	9,644.5	7,607.4
Land segment
Disaggregation of Revenue [Line Items]
Revenue									11,381.1	10,958.0	8,918.8
Land segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									3.3	3.0	0.4
Land segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									2,563.6	2,290.7	2,152.3
Land segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									631.8	705.6	586.9
Land segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									8,038.0	7,912.8	6,203.1
Marine segment
Disaggregation of Revenue [Line Items]
Revenue									9,249.5	8,199.3	7,182.5
Marine segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									3,552.1	3,347.0	2,695.5
Marine segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									3,148.3	2,605.2	2,052.7
Marine segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									610.2	548.8	492.7
Marine segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606									$ 1,480.5	$ 1,063.3	$ 868.6

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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.

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