| Statement [Line Items] | Period [Axis] | 
|---|
| 2015-08-01 - 2016-07-31 | 
|---|
| Change in Benefit Obligation | 
 Change in Benefit
 Obligation 
   
 
 |  |  |  |  |  |  |  |  |  |  
 |  |  | For the Year ended July 31, |  |  
 |  |  | 2016 |  |  | 2015 |  |  
 | (in millions) |  |  |  |  |  |  |  
 | Balance at beginning of
 year |  | $ | 17.0 |  |  | $ | 18.1 |  |  
 | Current service
 cost |  |  | 0.6 |  |  |  | 1.3 |  |  
 | Foreign currency exchange
 loss (gain) |  |  | 0.1 |  |  |  | (3.2 | ) |  
 | Interest cost |  |  | 0.7 |  |  |  | 0.7 |  |  
 | Net actuarial
 loss |  |  | 2.1 |  |  |  | 0.3 |  |  
 | Plan participant
 contributions |  |  | 0.1 |  |  |  | 0.2 |  |  
 | Benefit payments |  |  | (1.5 | ) |  |  | (0.4 | ) |  
 | Transfer from other
 plans |  |  | 0.2 |  |  |  | — |  |  
 |  |  |  |  |  |  |  |  |  |  
 | Balance at end of
 year |  | $ | 19.3 |  |  | $ | 17.0 |  |  
 |  |  |  |  |  |  |  |  |  |  | 
| Change in Plan Assets | 
 Change in Plan
 Assets 
   
 
 |  |  |  |  |  |  |  |  |  |  
 |  |  | 2016 |  |  | 2015 |  |  
 | (in millions) |  |  |  |  |  |  |  
 | Fair value at beginning of
 year |  | $ | 15.0 |  |  | $ | 15.7 |  |  
 | Actual return on plan
 assets |  |  | 0.4 |  |  |  | 1.5 |  |  
 | Employer
 contributions |  |  | 1.0 |  |  |  | 0.8 |  |  
 | Plan participant
 contributions |  |  | 0.1 |  |  |  | 0.2 |  |  
 | Benefits paid |  |  | (1.5 | ) |  |  | (0.4 | ) |  
 | Foreign currency exchange
 gain (loss) |  |  | 0.1 |  |  |  | (2.8 | ) |  
 | Transfer from other
 plans |  |  | 0.2 |  |  |  | — |  |  
 |  |  |  |  |  |  |  |  |  |  
 | Fair value at end of
 year |  | $ | 15.3 |  |  | $ | 15.0 |  |  
 |  |  |  |  |  |  |  |  |  |  
 | Funded status |  | $ | (4.0 | ) |  | $ | (2.0 | ) |  
 |  |  |  |  |  |  |  |  |  |  
 | Recognized Long-term
 liability |  | $ | (4.0 | ) |  | $ | (2.0 | ) |  
 |  |  |  |  |  |  |  |  |  |  | 
| Net Periodic Benefit Cost | 
 
 The components
 of our net periodic benefit cost are as follows: 
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 |  |  | For the Year ended July 31, |  |  
 |  |  | 2016 |  |  | 2015 |  |  | 2014 |  |  
 | (in millions) |  |  |  |  |  |  |  |  |  |  
 | Service cost |  | $ | 0.6 |  |  | $ | 1.3 |  |  | $ | 1.1 |  |  
 | Interest cost |  |  | 0.7 |  |  |  | 0.7 |  |  |  | 0.6 |  |  
 | Expected return on plan
 assets |  |  | (0.9 | ) |  |  | (0.9 | ) |  |  | (0.8 | ) |  
 | Amortization of net
 actuarial loss recognized |  |  | 0.1 |  |  |  | 0.2 |  |  |  | 0.1 |  |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | Total net periodic benefit
 cost |  | $ | 0.5 |  |  | $ | 1.3 |  |  | $ | 1.0 |  |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Amounts Recognized in Accumulated Other Comprehensive Income, Pretax | 
 Amounts Recognized in
 Accumulated Other Comprehensive Income, Pretax 
   
 
 |  |  |  |  |  |  |  |  |  |  
 |  |  | For the Year ended July 31, |  |  
 |  |  | 2016 |  |  | 2015 |  |  
 | (in millions) |  |  |  |  |  |  |  
 | Net loss |  | $ | 6.4 |  |  | $ | 3.9 |  |  
 |  |  |  |  |  |  |  |  |  |  
 | Accumulated other
 comprehensive loss |  | $ | 6.4 |  |  | $ | 3.9 |  |  
 |  |  |  |  |  |  |  |  |  |  | 
| Actuarial Assumptions | 
 
 Actuarial
 assumptions for the Analogic Canada Plan are described below. The
 discount rates at July 31 were used to measure the fiscal year
 end benefit obligations and the earnings effects for the subsequent
 year. The discount rate is based on high quality corporate bond
 spot rates with cash flows that match the timing and amount of
 expected benefit payments. 
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 |  |  | For the Year ended
 July 31, |  |  
 |  |  | 2016 |  |  | 2015 |  |  | 2014 |  |  
 | Discount rate |  |  | 4.0 | % |  |  | 4.2 | % |  |  | 4.8 | % |  
 | Expected return on
 assets |  |  | 6.0 | % |  |  | 6.0 | % |  |  | 6.0 | % |  | 
| Plan Assets Held in Trust | 
 
 The Analogic
 Canada Plan assets are held in trust, as follows: 
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 |  |  | July 31,
 2016 |  |  | July 31, 2015 |  |  
 | (in millions) |  | Target Allocation
 |  |  | Actual Allocation
 |  |  | Actual Allocation
 |  |  
 | Equity securities |  |  | 60.0 | % |  |  | 61.1 | % |  |  | 59.9 | % |  
 | Debt securities |  |  | 40.0 | % |  |  | 38.9 | % |  |  | 40.1 | % |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | Total |  |  | 100.0 | % |  |  | 100.0 | % |  |  | 100.0 | % |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Fair Value of Analogic Canada Plan Pension Assets by Asset Category | 
 
 The fair value
 of the Analogic Canada Plan pension assets by asset category at
 July 31, 2016 and 2015 are as follows: 
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | (in millions) |  | Fair Value Measurements
 at July 31, 2016 |  |  
 |  |  | Total |  |  | Quoted Prices in Active 
 Markets
 for Identical
 Assets (Level 1)
 |  |  | Significant Other
 Observable
 Inputs
 (Level
 2)
 |  |  | Significant Unobservable
 Inputs
 (Level
 3)
 |  |  
 | Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | Mutual funds (a) |  | $ | 15.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 15.3 |  |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | Total assets at fair
 value |  | $ | 15.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 15.3 |  |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
   
 
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | (in millions) |  | Fair Value Measurements
 at July 31, 2015 |  |  
 |  |  | Total |  |  | Quoted Prices in Active 
 Markets
 for Identical
 Assets (Level 1)
 |  |  | Significant Other
 Observable
 Inputs
 (Level
 2)
 |  |  | Significant Unobservable
 Inputs
 (Level
 3)
 |  |  
 | Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | Mutual funds (a) |  | $ | 15.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 15.0 |  |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 | Total assets at fair
 value |  | $ | 15.0 |  |  | $ | — |  |  | $ | — |  |  | $ | 15.0 |  |  
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
   
 
 | (a) | This comprises units of
 segregated pooled funds with an insurance company. These funds have
 underlying values primarily derived from mutual funds that have
 debt and equity securities, which are traded on an active market
 based on the closing price of each trading day. |  | 
| Fair Value Measurements Using Significant Unobservable Inputs | 
 
 
 |  |  |  |  |  |  |  |  |  |  
 |  |  | Fair Value Measurements
 Using
 Significant
 Unobservable
 Inputs
 (Level
 3)
 |  |  
 | (in millions) |  | July 31, 2016
 |  |  | July 31, 2015
 |  |  
 | Balance at beginning of
 fiscal year |  | $ | 15.0 |  |  | $ | 15.7 |  |  
 | Actual return on plan
 assets |  |  |  |  |  |  |  |  |  
 | Relating to assets still
 held at end of fiscal year |  |  | 0.4 |  |  |  | 1.5 |  |  
 | Purchases, sales and
 settlements |  |  | (0.2 | ) |  |  | 0.6 |  |  
 | Foreign currency exchange
 losses |  |  | 0.1 |  |  |  | (2.8 | ) |  
 |  |  |  |  |  |  |  |  |  |  
 | Balance at end of fiscal
 year |  | $ | 15.3 |  |  | $ | 15.0 |  |  
 |  |  |  |  |  |  |  |  |  |  | 
| Estimated Future Benefit Payments | 
 Estimated Future Benefit
 Payments 
 Estimated future
 benefit payments under the Analogic Canada Plan are as
 follows: 
   
 
 |  |  |  |  |  |  
 | (in millions) |  |  |  |  
 | 2017 |  | $ | 0.3 |  |  
 | 2018 |  |  | 0.4 |  |  
 | 2019 |  |  | 0.4 |  |  
 | 2020 |  |  | 0.4 |  |  
 | 2021 |  |  | 0.4 |  |  
 | 2022-2026 |  |  | 2.5 |  |  |