Intangible Assets by Major Asset Class (Detail) (USD $) In Millions, unless otherwise specified			12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Minimum	Dec. 31, 2012 Maximum	Dec. 31, 2012 Customer contracts and relationships	Dec. 31, 2011 Customer contracts and relationships	Dec. 31, 2012 Customer contracts and relationships Minimum	Dec. 31, 2012 Customer contracts and relationships Maximum	Dec. 31, 2012 Acquired technologies	Dec. 31, 2011 Acquired technologies	Dec. 31, 2012 Acquired technologies Minimum	Dec. 31, 2012 Acquired technologies Maximum	Dec. 31, 2012 Replacement parts annuity and product approvals	Dec. 31, 2011 Replacement parts annuity and product approvals	Dec. 31, 2012 Replacement parts annuity and product approvals Minimum	Dec. 31, 2012 Replacement parts annuity and product approvals Maximum	Dec. 31, 2012 Technical qualifications, plans and drawings	Dec. 31, 2011 Technical qualifications, plans and drawings	Dec. 31, 2012 Technical qualifications, plans and drawings Minimum	Dec. 31, 2012 Technical qualifications, plans and drawings Maximum	Dec. 31, 2012 Trademarks and patents	Dec. 31, 2011 Trademarks and patents	Dec. 31, 2012 Trademarks and patents Minimum	Dec. 31, 2012 Trademarks and patents Maximum	Dec. 31, 2012 Covenants not to compete	Dec. 31, 2011 Covenants not to compete	Dec. 31, 2012 Covenants not to compete Minimum	Dec. 31, 2012 Covenants not to compete Maximum	Dec. 31, 2012 Trade names	Dec. 31, 2011 Trade names
Goodwill and Intangible Assets Disclosure [Line Items]
Useful life (years)			2 years	34 years			8 years	30 years			9 years	34 years			16 years	22 years			15 years	22 years			2 years	20 years			3 years	5 years
Intangible assets, original cost	$ 667.7	$ 568.6
Finite lived intangible assets, original cost					410.8	314.7			127.7	128.5			28.3	39.5			26.9	30.4			27.1	29.9			3.3	5.7
Accumulated Amortization	183.2	178.8			64.0	44.5			50.6	46.5			25.7	36.0			22.7	25.0			19.4	21.2			0.8	5.6
Finite lived intangible assets, net book value					346.8	270.2			77.1	82.0			2.6	3.5			4.2	5.4			7.7	8.7			2.5	0.1
Intangible assets, net book value	484.5	389.8
Indefinite lived intangible assets, net book value																													$ 43.6	$ 19.9