Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Other revenues (excluded from ASC 606)	$ 131.9	$ 163.3	$ 302.5	$ 351.0
Revenue	10,150.8	8,086.2	19,332.2	16,280.4
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	1,168.5	1,094.1	2,361.1	2,246.4
EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	2,430.6	1,828.2	4,417.9	3,542.9
LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	761.6	592.1	1,591.3	1,250.0
North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	5,658.2	4,408.3	10,659.4	8,890.1
Aviation segment
Disaggregation of Revenue [Line Items]
Revenue	4,900.7	3,508.4	9,193.6	6,825.8
Aviation segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	363.6	248.5	755.6	507.1
Aviation segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	962.8	616.6	1,632.8	1,069.9
Aviation segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	477.2	301.7	967.4	632.5
Aviation segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	3,157.6	2,295.6	5,920.6	4,551.5
Marine segment
Disaggregation of Revenue [Line Items]
Revenue	2,289.9	2,013.8	4,317.7	4,107.3
Marine segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	804.1	845.3	1,603.6	1,738.7
Marine segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	832.2	681.5	1,469.6	1,340.7
Marine segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	128.1	132.4	283.3	288.5
Marine segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	358.0	246.4	637.9	476.8
Land segment
Disaggregation of Revenue [Line Items]
Revenue	2,960.2	2,564.0	5,820.9	5,347.4
Land segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	0.8	0.3	1.9	0.6
Land segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	635.7	530.2	1,315.5	1,132.4
Land segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	156.3	158.0	340.6	329.0
Land segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	$ 2,142.6	$ 1,866.3	$ 4,100.9	$ 3,861.8