Intangible Assets by Major Asset Class (Detail) (USD $) In Millions, unless otherwise specified				9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Customer contracts and relationships	Sep. 30, 2014 Customer contracts and relationships Minimum	Sep. 30, 2014 Customer contracts and relationships Maximum	Sep. 30, 2014 Acquired technologies	Sep. 30, 2014 Acquired technologies Minimum	Sep. 30, 2014 Acquired technologies Maximum	Sep. 30, 2014 Replacement parts annuity and product approvals	Sep. 30, 2014 Replacement parts annuity and product approvals Minimum	Sep. 30, 2014 Replacement parts annuity and product approvals Maximum	Sep. 30, 2014 Technical qualifications, plans and drawings	Sep. 30, 2014 Technical qualifications, plans and drawings Minimum	Sep. 30, 2014 Technical qualifications, plans and drawings Maximum	Sep. 30, 2014 Trademarks and patents	Sep. 30, 2014 Trademarks and patents Minimum	Sep. 30, 2014 Trademarks and patents Maximum	Sep. 30, 2014 Covenants not to compete and other identified intangibles	Sep. 30, 2014 Covenants not to compete and other identified intangibles Minimum	Sep. 30, 2014 Covenants not to compete and other identified intangibles Maximum	Sep. 30, 2014 Trade names	Sep. 30, 2014 Trade names Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, original cost	$ 860.9
Useful life (years)				P8Y	P-30Y		P5Y	P-34Y		P7Y	P-22Y		P10Y	P-22Y		P3Y	P-20Y		P4Y	P-5Y		P15Y
Finite lived intangible assets, original cost			582.0			152.1			7.8			17.7			24.9			36.7			39.7
Accumulated Amortization	209.4	179.8	106.3			57.9			6.5			15.4			16.3			5.7			1.3
Intangible assets, net book value	651.5	472.2
Finite lived intangible assets, net book value			$ 475.7			$ 94.2			$ 1.3			$ 2.3			$ 8.6			$ 31.0			$ 38.4