Consolidated Balance Sheets - USD ($) $ in Millions		Sep. 30, 2016		Dec. 31, 2015		Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	[1]	$ 872.3		$ 582.5		$ 609.6	$ 302.3
Accounts receivable, net	[1]	2,062.6		1,812.6
Inventories	[1]	484.5		359.1
Prepaid expenses	[1]	57.6		57.9
Short-term derivative assets, net	[1]	34.4		220.4
Other current assets	[1]	241.2		208.0
Current assets held for sale	[1]	0.0		5.5
Total current assets	[1]	3,752.5		3,246.0
Property and equipment, net	[1]	260.3		225.6
Goodwill	[1]	720.0		675.8
Identifiable intangible and other non-current assets	[1]	419.7		341.4
Non-current assets held for sale	[1]	0.0		36.5
Total assets	[1]	5,152.5		4,525.3
Current liabilities:
Short-term debt		28.8	[1]	25.5	[1]	25.5
Accounts payable	[1]	1,558.6		1,349.6
Customer deposits	[1]	106.5		118.3
Accrued expenses and other current liabilities	[1]	254.3		255.2
Current liabilities held for sale	[1]	0.0		5.6
Total current liabilities	[1]	1,948.2		1,754.2
Long-term debt		1,110.1	[1]	746.7	[1]	746.7
Non-current income tax liabilities, net	[1]	86.0		87.7
Other long-term liabilities	[1]	31.4		25.8
Non-current liabilities held for sale	[1]	0.0		5.0
Total liabilities	[1]	3,175.7		2,619.4
Commitments and contingencies	[1]
World Fuel shareholders' equity:
Preferred stock, $1.00 par value; 0.1 shares authorized, none issued	[1]	0.0		0.0
Common stock, $0.01 par value; 100 shares authorized, 70.4 and 70.8 issued and outstanding as of September 30, 2016 and December 31, 2015, respectively	[1]	0.7		0.7
Capital in excess of par value	[1]	418.0		435.3
Retained earnings	[1]	1,681.2		1,569.4
Accumulated other comprehensive loss	[1]	(138.3)		(109.5)
Total World Fuel shareholders' equity	[1]	1,961.6		1,895.9
Noncontrolling interest equity	[1]	15.2		10.0
Total equity	[1]	1,976.8		1,905.9		$ 1,864.4	$ 1,859.4
Total liabilities and equity	[1]	$ 5,152.5		$ 4,525.3

[1] Amounts may not add due to rounding