Common Stock - Additional Information (Detail) - USD ($)			12 Months Ended
	Feb. 04, 2016	Nov. 14, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Payment to acquire business			$ 839,300,000
Subsequent Event [Member]
Class of Stock [Line Items]
Repurchase of common Stock	$ 500,000,000
Comdata Inc. [Member]
Class of Stock [Line Items]
Payment to acquire business		$ 3,400,000,000
Cash consideration		$ 2,400,000,000
Common shares issued to finance acquisition		7,625,380