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NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Mar. 31, 2018
General Information About Financial Statements [Abstract]  
Disclosure of estimated useful lives of property, plant and equipment
The estimated useful lives, residual values and depreciation methods are as follows:
 
 
Method
Amortization rate/period
Buildings and improvements
Straight-line
2.5 to 10%/3 to 40 years
Simulators
Straight-line (10% residual)
Not exceeding 25 years
Machinery and equipment
Declining balance/Straight-line
20 to 35%/2 to 10 years
Aircraft
Straight-line (residual not exceeding 15%)
Not exceeding 25 years
Aircraft engines
Based on utilization
Not exceeding 3,500 hours
  
 
 
 
 
 
 
 
 
 
 
 
Assets

 
 
 
 
  
 
 
Buildings
 
 
 
Machinery
 
Aircraft and
 
 
under

 
Assets

 
 
  
 
 
 
and

 
 
 
and

 
aircraft

 
finance

 
under

 
 
 (amounts in millions)
 
Land

improvements
 
Simulators
 
equipment
 
 
engines

 
lease

construction
 
 
Total

Net book value at March 31, 2016
 
$
24.1

 
$
199.6

 
$
925.9

 
$
50.7

 
$
22.1

 
$
153.5

 
$
97.2

 
$
1,473.1

Additions
 
—

 
14.9

 
34.6

 
15.2

 
41.3

 
—

 
116.9

 
222.9

Acquisition of subsidiaries
 
—

 
1.9

 
22.5

 
0.4

 
—

 
13.7

 
—

 
38.5

Disposals
 
—

 
(1.3
)
 
(3.1
)
 
(0.1
)
 
(4.7
)
 
(0.2
)
 
—

 
(9.4
)
Depreciation
 
—

 
(15.9
)
 
(68.9
)
 
(17.1
)
 
(3.6
)
 
(17.3
)
 
—

 
(122.8
)
Transfers and others
 
—

 
(1.4
)
 
113.8

 
(0.2
)
 
—

 
(1.6
)
 
(118.9
)
 
(8.3
)
Exchange differences
 
(0.5
)
 
(1.7
)
 
(12.1
)
 
(0.3
)
 
0.1

 
2.0

 
1.1

 
(11.4
)
Net book value at March 31, 2017
 
$
23.6

 
$
196.1

 
$
1,012.7

 
$
48.6

 
$
55.2

 
$
150.1

 
$
96.3

 
$
1,582.6

Additions
 
—

 
13.3

 
27.8

 
16.5

 
5.6

 
—

 
110.7

 
173.9

Acquisition of subsidiaries (Note 3)
 
—

 
7.8

 
87.0

 
0.4

 
—

 
—

 
32.5

 
127.7

Disposals
 
—

 
(0.1
)
 
(18.0
)
 
(0.1
)
 
(0.5
)
 
(2.2
)
 
—

 
(20.9
)
Depreciation
 
—

 
(15.4
)
 
(66.8
)
 
(18.3
)
 
(3.8
)
 
(16.5
)
 
—

 
(120.8
)
Transfers and others
 
—

 
(1.4
)
 
114.0

 
2.3

 
(0.4
)
 
(7.1
)
 
(78.0
)
 
29.4

Exchange differences
 
0.3

 
2.5

 
29.2

 
0.9

 
(0.7
)
 
(3.1
)
 
2.9

 
32.0

Net book value at March 31, 2018
 
$
23.9

 
$
202.8

 
$
1,185.9

 
$
50.3

 
$
55.4

 
$
121.2

 
$
164.4

 
$
1,803.9

 
 
 
 
 
 
 
 
 
 
 
 
 
Assets

 
 
 
 
 
 
 
Buildings
 
 
 
Machinery
 
Aircraft and
 
 
under

 
Assets

 
 
 
 
 
 
and

 
 
 
and

 
aircraft

 
finance

 
under

 
 
 
 
Land

improvements
 
Simulators
 
equipment
 
 
engines

 
lease

construction
 
 
Total

Cost
 
$
23.6

 
$
375.4

 
$
1,427.2

 
$
218.9

 
$
62.2

 
$
291.5

 
$
96.3

 
$
2,495.1

Accumulated depreciation
 
—

 
(179.3
)
 
(414.5
)
 
(170.3
)
 
(7.0
)
 
(141.4
)
 
—

 
(912.5
)
Net book value at March 31, 2017
 
$
23.6

 
$
196.1

 
$
1,012.7

 
$
48.6

 
$
55.2

 
$
150.1

 
$
96.3

 
$
1,582.6

Cost
 
$
23.9

 
$
401.1

 
$
1,683.9

 
$
223.4

 
$
64.4

 
$
276.1

 
$
164.4

 
$
2,837.2

Accumulated depreciation
 
—

 
(198.3
)
 
(498.0
)
 
(173.1
)
 
(9.0
)
 
(154.9
)
 
—

 
(1,033.3
)
Net book value at March 31, 2018
 
$
23.9

 
$
202.8

 
$
1,185.9

 
$
50.3

 
$
55.4

 
$
121.2

 
$
164.4

 
$
1,803.9
Disclosure of estimated useful lives of intangible assets
Amortization is calculated using the straight-line method for all intangible assets over their estimated useful lives as follows:
 
Amortization period
 
(in years)
Capitalized development costs
5 to 10
Customer relationships
3 to 20
ERP and other software
3 to 10
Technology
3 to 10
Other intangible assets
2 to 40