Debt - Long-Term Debt (Parenthetical) (Detail)	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Nov. 30, 2011
Term Loan [Member]
Debt Disclosure [Line Items]
Due year	2019	2019
7.375% Senior Notes, Due 2021 [Member]
Debt Disclosure [Line Items]
Interest rate of debt	7.375%	7.375%	7.375%
Due year	2021	2021
Revolving Credit Facility, Due 2018 [Member]
Debt Disclosure [Line Items]
Due year	2018	2018
6.10% Senior Notes, Due 2028 [Member]
Debt Disclosure [Line Items]
Interest rate of debt	6.10%	6.10%
Due year	2028	2028