CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total World Fuel Shareholders' Equity	Noncontrolling Interest Equity
Beginning balance (in shares) at Dec. 31, 2020		62.9
Beginning balance at Dec. 31, 2020	$ 1,912.9	$ 0.6	$ 204.6	$ 1,836.7	$ (132.6)	$ 1,909.3	$ 3.6
Increase (Decrease) in Shareholders' Equity
Net income (loss)	18.8			18.9		18.9
Cash dividends declared	(7.5)			(7.5)		(7.5)
Amortization of share-based payment awards	8.7		8.7			8.7
Issuance (cancellation) of common stock related to share-based payment awards (in shares)		0.1
Purchases of common stock tendered by employees to satisfy the required withholding taxes related to share-based payment awards	(2.4)		(2.4)			(2.4)
Other comprehensive income (loss)	12.4				12.4	12.4
Other	0.2			0.2		0.2
Ending balance (in shares) at Mar. 31, 2021		63.0
Ending balance at Mar. 31, 2021	1,943.0	$ 0.6	210.8	1,848.3	(120.3)	1,939.5	3.5
Beginning balance (in shares) at Dec. 31, 2020		62.9
Beginning balance at Dec. 31, 2020	1,912.9	$ 0.6	204.6	1,836.7	(132.6)	1,909.3	3.6
Increase (Decrease) in Shareholders' Equity
Net income (loss)	36.4
Other comprehensive income (loss)	8.5
Ending balance (in shares) at Jun. 30, 2021		63.3
Ending balance at Jun. 30, 2021	1,949.7	$ 0.6	211.3	1,858.4	(124.1)	1,946.2	3.5
Beginning balance (in shares) at Mar. 31, 2021		63.0
Beginning balance at Mar. 31, 2021	1,943.0	$ 0.6	210.8	1,848.3	(120.3)	1,939.5	3.5
Increase (Decrease) in Shareholders' Equity
Net income (loss)	17.6			17.6		17.6	(0.1)
Cash dividends declared	(7.6)			(7.6)		(7.6)
Amortization of share-based payment awards	3.3		3.3			3.3
Issuance (cancellation) of common stock related to share-based payment awards (in shares)		0.3
Issuance (cancellation) of common stock related to share-based payment awards	0.3		0.2			0.3
Purchases of common stock tendered by employees to satisfy the required withholding taxes related to share-based payment awards	(3.1)		(3.1)			(3.1)
Other comprehensive income (loss)	(3.8)				(3.8)	(3.8)
Ending balance (in shares) at Jun. 30, 2021		63.3
Ending balance at Jun. 30, 2021	$ 1,949.7	$ 0.6	211.3	1,858.4	(124.1)	1,946.2	3.5
Beginning balance (in shares) at Dec. 31, 2021	61.7	61.7
Beginning balance at Dec. 31, 2021	$ 1,916.8	$ 0.6	168.1	1,880.6	(136.7)	1,912.7	4.1
Increase (Decrease) in Shareholders' Equity
Net income (loss)	26.3			26.3		26.3	(0.1)
Cash dividends declared	(7.6)			(7.6)		(7.6)
Amortization of share-based payment awards	3.7		3.7			3.7
Issuance (cancellation) of common stock related to share-based payment awards (in shares)		0.1
Issuance of common stock for acquisition of a business (in shares)		1.8
Issuance of common stock for acquisition of a business	50.0		50.0			50.0
Purchases of common stock tendered by employees to satisfy the required withholding taxes related to share-based payment awards	(1.3)		(1.3)			(1.3)
Purchases of common stock (in shares)		(0.5)
Purchases of common stock	(13.7)		(13.7)			(13.7)
Other comprehensive income (loss)	(28.7)				(28.7)	(28.7)
Ending balance (in shares) at Mar. 31, 2022		63.0
Ending balance at Mar. 31, 2022	$ 1,945.5	$ 0.6	206.7	1,899.4	(165.4)	1,941.4	4.1
Beginning balance (in shares) at Dec. 31, 2021	61.7	61.7
Beginning balance at Dec. 31, 2021	$ 1,916.8	$ 0.6	168.1	1,880.6	(136.7)	1,912.7	4.1
Increase (Decrease) in Shareholders' Equity
Net income (loss)	51.1
Other comprehensive income (loss)	$ (37.3)
Ending balance (in shares) at Jun. 30, 2022	61.9	61.9
Ending balance at Jun. 30, 2022	$ 1,920.2	$ 0.6	172.8	1,916.4	(174.0)	1,915.7	4.5
Beginning balance (in shares) at Mar. 31, 2022		63.0
Beginning balance at Mar. 31, 2022	1,945.5	$ 0.6	206.7	1,899.4	(165.4)	1,941.4	4.1
Increase (Decrease) in Shareholders' Equity
Net income (loss)	24.8			24.4		24.4	0.4
Cash dividends declared	(7.4)			(7.4)		(7.4)
Amortization of share-based payment awards	3.1		3.1			3.1
Issuance (cancellation) of common stock related to share-based payment awards (in shares)		0.2
Purchases of common stock tendered by employees to satisfy the required withholding taxes related to share-based payment awards (in shares)		0.2
Purchases of common stock tendered by employees to satisfy the required withholding taxes related to share-based payment awards	(2.0)		(2.0)			(2.0)
Purchases of common stock (in shares)		(1.5)
Purchases of common stock	(35.0)		(35.0)			(35.0)
Other comprehensive income (loss)	$ (8.7)				(8.7)	(8.7)
Ending balance (in shares) at Jun. 30, 2022	61.9	61.9
Ending balance at Jun. 30, 2022	$ 1,920.2	$ 0.6	$ 172.8	$ 1,916.4	$ (174.0)	$ 1,915.7	$ 4.5