Preliminary Estimates of Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	$ 1,571.0	$ 1,484.2	$ 1,008.3
Aerospace Corp. and Interturbine
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade	10.9
Inventories	3.9
Other current and non-current assets	0.2
Property and equipment	34.3
Goodwill	58.7
Identified intangibles	17.1
Accounts payable	(9.9)
Other current and non-current liabilities	(0.6)
Total purchase price	$ 114.6