Acquisitions - Additional Information (Detail)	3 Months Ended								12 Months Ended						0 Months Ended	12 Months Ended		0 Months Ended				0 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Nov. 14, 2014 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2014 Masternaut Group Holdings Limited [Member]	Nov. 14, 2014 Comdata Inc. [Member] USD ($)	Dec. 31, 2014 Comdata Inc. [Member] USD ($)	Dec. 31, 2013 Comdata Inc. [Member] USD ($)	Mar. 25, 2013 GE Capital's Fleet Card [Member]	Apr. 29, 2014 Card Link [Member] USD ($)	Apr. 29, 2014 Card Link [Member] Foreign Line of Credit New Zealand [Member] NZD	Dec. 31, 2013 Russian Fuel Card Company [Member] USD ($)	Jul. 03, 2012 CTF Technologies [Member] USD ($)	Dec. 31, 2012 All 2012 Acquisitions [Member] USD ($)	Nov. 14, 2014 Ceridian Llc [Member] Common Stock [Member]	Dec. 31, 2014 All 2013 Acquisitions [Member] USD ($)	Dec. 31, 2013 All 2013 Acquisitions [Member] USD ($)	Dec. 31, 2013 All 2013 Acquisitions [Member] Accrued Expenses and Other Long Term Liabilities [Member] USD ($)	Dec. 31, 2013 All 2013 Acquisitions [Member] Other Noncurrent Assets [Member] USD ($)	Dec. 31, 2013 Minimum [Member] USD ($)	Dec. 31, 2013 Maximum [Member] USD ($)
Business Acquisition [Line Items]
Aggregate purchase price									$ 3,670,000,000	$ 839,300,000	$ 207,400,000				$ 3,420,000,000							$ 156,000,000
Cash acquired									165,800,000	35,600,000													1,900,000
Equity method investment, ownership percentage														44.00%
Business acquisition date															Nov. 14, 2014
Issuance of new debt in acquisition												2,400,000,000
Common shares issued to finance acquisition															7,625,380									7,625,380
Revenues, net	376,697,000	295,283,000	273,502,000	253,908,000	255,501,000	225,150,000	220,869,000	193,651,000	1,199,390,000	895,171,000	707,534,000					69,800,000
Net loss	109,540,000	95,509,000	88,549,000	75,109,000	68,120,000	78,620,000	73,099,000	64,662,000	368,707,000	284,501,000	216,199,000					19,100,000
Legal settlement included in proforma net income																	100,000,000
Acquisition related costs									29,200,000	6,000,000	2,500,000
Deferred payment					36,800,000					36,800,000	11,300,000										11,300,000		11,300,000		23,200,000
Contingent consideration	43,486,000				80,476,000				43,486,000	80,476,000	4,900,000												4,900,000		42,900,000	83,100,000	49,200,000
Adjustments to the estimated fair value of contingent consideration									28,100,000
Customer relationships with regards to fuel cards																		33.33%
Facility used for acquisition	9,400,000								9,400,000										9,400,000	12,000,000
Uncertain tax positions	18,641,000				21,601,000				18,641,000	21,601,000	7,077,000		4,994,000													11,300,000
Indemnification asset recorded																									$ 45,300,000			$ 45,300,000	$ 60,400,000	$ 89,600,000