Subsequent Events (Detail 1) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Mar. 01, 2015	Jan. 30, 2015	Mar. 17, 2015
Maximum
Subsequent Event [Line Items]
Credit Agreement, leverage ratio		325.00%
Minimum
Subsequent Event [Line Items]
Credit Agreement, interest coverage ratio		350.00%
Subsequent Event | Maximum
Subsequent Event [Line Items]
Credit Agreement, leverage ratio			3.25%
Subsequent Event | Maximum | Until July 31, 2016
Subsequent Event [Line Items]
Credit Agreement, leverage ratio			4.00%
Subsequent Event | Maximum | After July 31, 2016
Subsequent Event [Line Items]
Credit Agreement, leverage ratio			3.75%
Subsequent Event | Minimum
Subsequent Event [Line Items]
Credit Agreement, interest coverage ratio			3.50%
Subsequent Event | Scitor Holdings
Subsequent Event [Line Items]
Definitive agreement to acquire business, purchase price	$ 790
Definitive agreement to acquire business, expected closing period	second quarter of fiscal 2016
Subsequent Event | Scitor Holdings | Secured Debt
Subsequent Event [Line Items]
Expected increase in term loan facility			670