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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenue Recognition |  |  |  |  |
Cost in excess of billings | $ 100.8 | $ 124.4 | $ 100.8 | $ 124.4 |
Billings in excess of cost | 38.1 | 61.1 | 38.1 | 61.1 |
Research and development |  |  |  |  |
Research and development |  |  | 125.8 | 93.6 | 78.2
Goodwill and identifiable intangible assets |  |  |  |  |
Goodwill planning period |  |  | 6 years |  |
Perpetual growth rate |  |  | 3.00% |  |
Impairment charges, related to trade names | 11.0 | 60.7 | 11.0 | 60.7 | 0
Goodwill and intangible assets | 6,910.3 |  | 6,910.3 |  |
Goodwill and intangible assets as a percentage of total assets | 59.00% |  | 59.00% |  |
Equity and cost method investments |  |  |  |  |
Investments in and loans to equity method investees | 12.2 | 10.3 | 12.2 | 10.3 |
Aggregate balance cost method investments | 8.3 | 6.9 | 8.3 | 6.9 |
Insurance subsidiary |  |  |  |  |
Reserve for policy claims | 51.1 | 42.9 | 51.1 | 42.9 |
Minimum |  |  |  |  |
Basis of presentation |  |  |  |  |
Equity method investment, ownership percentage | 20.00% |  | 20.00% |  |
Goodwill and identifiable intangible assets |  |  |  |  |
Discounted cash flows discount rate | 11.50% |  | 11.50% |  |
Maximum |  |  |  |  |
Basis of presentation |  |  |  |  |
Equity method investment, ownership percentage | 50.00% |  | 50.00% |  |
Goodwill and identifiable intangible assets |  |  |  |  |
Discounted cash flows discount rate | 12.50% |  | 12.50% |  |
Income taxes |  |  |  |  |
Percentage of recognized income tax positions that could be realized at the largest amount | 50.00% |  | 50.00% |  |
Other Current Liabilities |  |  |  |  |
Insurance subsidiary |  |  |  |  |
Reserve for policy claims | 13.2 | 13.3 | 13.2 | 13.3 |
Other Noncurrent Liabilities |  |  |  |  |
Insurance subsidiary |  |  |  |  |
Reserve for policy claims | 37.9 | 29.6 | 37.9 | 29.6 |
Credit Concentration Risk |  |  |  |  |
Trade receivables and concentration of credit risk |  |  |  |  |
Customer receivable balances to total trade receivables |  |  | 10.00% | 10.00% |
Number of customers | 0 | 0 | 0 | 0 |
Process Technologies |  |  |  |  |
Goodwill and identifiable intangible assets |  |  |  |  |
Pre-tax non-cash Impairment charge on goodwill |  |  |  |  | 200.5
Impairment charges, related to trade names |  |  |  | $ 23.2 |

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