Business Combinations and Investments, Goodwill and Acquired Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Weighted Average Useful Life in Years	9 years 6 months
Proprietary Technology [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Weighted Average Useful Life in Years	10 years
Customer List/Relationships [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Weighted Average Useful Life in Years	12 years
Backlog [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Weighted Average Useful Life in Years	9 months 18 days
RESON A/S [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Intangibles subject to amortization	17.5
Intangibles not subject to amortization	8.0
Total acquired intangible assets	25.5
RESON A/S [Member] | Proprietary Technology [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Intangibles subject to amortization	10.3
RESON A/S [Member] | Customer List/Relationships [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Intangibles subject to amortization	6.8
RESON A/S [Member] | Backlog [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Intangibles subject to amortization	0.4
RESON A/S [Member] | Trademarks and Trade Names [Member]
Schedule of Acquired Intangible Asset by Major Class [Line Items]
Intangibles not subject to amortization	8.0