Property, plant and equipment - Net book value of property, plant and equipment (Details) - ZAR (R) R in Thousands | 12 Months Ended |
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017 |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | R 334,038 | R 294,120 | |
Additions | 224,026 | 238,248 | |
Transfers | 0 | 0 | |
Assets classified as held for sale | | (17,058) | |
Impairment (notes 5, 24, 30, 32.2) | | (9) | |
Disposals | (1,636) | (1,936) | |
Depreciation charge (notes 5, 24, 32.2) | (183,478) | (151,945) | R (98,508) |
Currency translation differences | 53,928 | (27,382) | |
Property, plant and equipment | 457,446 | 334,038 | 294,120 |
Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 334,038 | | |
Additions | 208,910 | | |
Transfers | 0 | | |
Disposals | (1,636) | | |
Depreciation charge (notes 5, 24, 32.2) | (171,755) | | |
Currency translation differences | 48,095 | | |
Property, plant and equipment | 417,652 | 334,038 | |
Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 15,116 | | |
Depreciation charge (notes 5, 24, 32.2) | (11,723) | | |
Currency translation differences | 5,833 | | |
Property, plant and equipment | 39,794 | 0 | |
Gross carrying amount | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 614,517 | 517,049 | |
Currency translation differences | 79,532 | (38,627) | |
Property, plant and equipment | | 614,517 | 517,049 |
Gross carrying amount | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 70,935 | | |
Property, plant and equipment | 833,081 | | |
Gross carrying amount | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 8,320 | | |
Property, plant and equipment | 69,247 | | |
Accumulated depreciation and impairments | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | (280,479) | (222,929) | |
Currency translation differences | (25,604) | 11,245 | |
Property, plant and equipment | | (280,479) | (222,929) |
Accumulated depreciation and impairments | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | (22,840) | | |
Property, plant and equipment | (415,429) | | |
Accumulated depreciation and impairments | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | (2,487) | | |
Property, plant and equipment | (29,453) | | |
Property | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | 17,511 | |
Additions | 14,674 | 0 | |
Transfers | 0 | 0 | |
Assets classified as held for sale | | (17,058) | |
Impairment (notes 5, 24, 30, 32.2) | | 0 | |
Disposals | 0 | 0 | |
Depreciation charge (notes 5, 24, 32.2) | (10,947) | (453) | |
Currency translation differences | 5,668 | 0 | |
Property, plant and equipment | 38,668 | 0 | 17,511 |
Property | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 0 | | |
Transfers | 0 | | |
Disposals | 0 | | |
Depreciation charge (notes 5, 24, 32.2) | 0 | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | 0 | |
Property | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 14,674 | | |
Depreciation charge (notes 5, 24, 32.2) | (10,947) | | |
Currency translation differences | 5,668 | | |
Property, plant and equipment | 38,668 | 0 | |
Property | Gross carrying amount | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | 22,288 | |
Currency translation differences | 8,298 | 0 | |
Property, plant and equipment | | 0 | 22,288 |
Property | Gross carrying amount | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
Property | Gross carrying amount | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 8,298 | | |
Property, plant and equipment | 66,502 | | |
Property | Accumulated depreciation and impairments | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | (4,777) | |
Currency translation differences | (2,630) | 0 | |
Property, plant and equipment | | 0 | (4,777) |
Property | Accumulated depreciation and impairments | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
Property | Accumulated depreciation and impairments | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | (2,630) | | |
Property, plant and equipment | (27,834) | | |
Plant, equipment, vehicles and other | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 12,219 | 14,871 | |
Additions | 6,068 | 4,090 | |
Transfers | (12) | (613) | |
Assets classified as held for sale | | 0 | |
Impairment (notes 5, 24, 30, 32.2) | | (6) | |
Disposals | (223) | (606) | |
Depreciation charge (notes 5, 24, 32.2) | (5,438) | (5,237) | |
Currency translation differences | 432 | (280) | |
Property, plant and equipment | 14,341 | 12,219 | 14,871 |
Plant, equipment, vehicles and other | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 12,219 | | |
Additions | 5,626 | | |
Transfers | (12) | | |
Disposals | (223) | | |
Depreciation charge (notes 5, 24, 32.2) | (4,662) | | |
Currency translation differences | 267 | | |
Property, plant and equipment | 13,215 | 12,219 | |
Plant, equipment, vehicles and other | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 442 | | |
Depreciation charge (notes 5, 24, 32.2) | (776) | | |
Currency translation differences | 165 | | |
Property, plant and equipment | 1,126 | 0 | |
Plant, equipment, vehicles and other | Gross carrying amount | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 47,066 | 48,186 | |
Currency translation differences | 2,315 | (1,103) | |
Property, plant and equipment | | 47,066 | 48,186 |
Property, plant and equipment retired and removed from accounting records | 1,400 | 1,200 | |
Plant, equipment, vehicles and other | Gross carrying amount | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 2,016 | | |
Property, plant and equipment | 50,262 | | |
Plant, equipment, vehicles and other | Gross carrying amount | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 22 | | |
Property, plant and equipment | 2,745 | | |
Plant, equipment, vehicles and other | Accumulated depreciation and impairments | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | (34,847) | (33,315) | |
Currency translation differences | (1,883) | 823 | |
Property, plant and equipment | | (34,847) | (33,315) |
Plant, equipment, vehicles and other | Accumulated depreciation and impairments | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | (1,749) | | |
Property, plant and equipment | (37,047) | | |
Plant, equipment, vehicles and other | Accumulated depreciation and impairments | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 143 | | |
Property, plant and equipment | (1,619) | | |
Computer and radio equipment | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 10,370 | 12,320 | |
Additions | 6,474 | 4,630 | |
Transfers | 12 | 613 | |
Assets classified as held for sale | | 0 | |
Impairment (notes 5, 24, 30, 32.2) | | (3) | |
Disposals | (58) | (165) | |
Depreciation charge (notes 5, 24, 32.2) | (5,418) | (6,772) | |
Currency translation differences | 356 | (253) | |
Property, plant and equipment | 11,736 | 10,370 | 12,320 |
Computer and radio equipment | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 10,370 | | |
Additions | 6,474 | | |
Transfers | 12 | | |
Disposals | (58) | | |
Depreciation charge (notes 5, 24, 32.2) | (5,418) | | |
Currency translation differences | 356 | | |
Property, plant and equipment | 11,736 | 10,370 | |
Computer and radio equipment | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 0 | | |
Depreciation charge (notes 5, 24, 32.2) | 0 | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | 0 | |
Computer and radio equipment | Gross carrying amount | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 46,735 | 58,048 | |
Currency translation differences | 1,911 | (985) | |
Property, plant and equipment | | 46,735 | 58,048 |
Property, plant and equipment retired and removed from accounting records | 200 | 14,700 | |
Computer and radio equipment | Gross carrying amount | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 1,911 | | |
Property, plant and equipment | 51,853 | | |
Computer and radio equipment | Gross carrying amount | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
Computer and radio equipment | Accumulated depreciation and impairments | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | (36,365) | (45,728) | |
Currency translation differences | (1,555) | 732 | |
Property, plant and equipment | | (36,365) | (45,728) |
Computer and radio equipment | Accumulated depreciation and impairments | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | (1,555) | | |
Property, plant and equipment | (40,117) | | |
Computer and radio equipment | Accumulated depreciation and impairments | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
In-vehicle devices uninstalled | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 50,171 | 55,470 | |
Additions | 196,810 | 229,528 | |
Transfers | (175,473) | (232,050) | |
Assets classified as held for sale | | 0 | |
Impairment (notes 5, 24, 30, 32.2) | | 0 | |
Disposals | 0 | 0 | |
Depreciation charge (notes 5, 24, 32.2) | 0 | 0 | |
Currency translation differences | 5,005 | (2,777) | |
Property, plant and equipment | 76,513 | 50,171 | 55,470 |
In-vehicle devices uninstalled | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 50,171 | | |
Additions | 196,810 | | |
Transfers | (175,473) | | |
Disposals | 0 | | |
Depreciation charge (notes 5, 24, 32.2) | 0 | | |
Currency translation differences | 5,005 | | |
Property, plant and equipment | 76,513 | 50,171 | |
In-vehicle devices uninstalled | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 0 | | |
Depreciation charge (notes 5, 24, 32.2) | 0 | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | 0 | |
In-vehicle devices uninstalled | Gross carrying amount | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 50,171 | 55,470 | |
Currency translation differences | 5,005 | (2,777) | |
Property, plant and equipment | | 50,171 | 55,470 |
In-vehicle devices uninstalled | Gross carrying amount | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 5,005 | | |
Property, plant and equipment | 76,513 | | |
In-vehicle devices uninstalled | Gross carrying amount | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
In-vehicle devices uninstalled | Accumulated depreciation and impairments | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | 0 | |
Currency translation differences | 0 | 0 | |
Property, plant and equipment | | 0 | 0 |
In-vehicle devices uninstalled | Accumulated depreciation and impairments | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
In-vehicle devices uninstalled | Accumulated depreciation and impairments | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
In-vehicle devices installed | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 261,278 | 193,948 | |
Additions | 0 | 0 | |
Transfers | 175,473 | 232,050 | |
Assets classified as held for sale | | 0 | |
Impairment (notes 5, 24, 30, 32.2) | | 0 | |
Disposals | (1,355) | (1,165) | |
Depreciation charge (notes 5, 24, 32.2) | (161,675) | (139,483) | |
Currency translation differences | 42,467 | (24,072) | |
Property, plant and equipment | 316,188 | 261,278 | 193,948 |
In-vehicle devices installed | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 261,278 | | |
Additions | 0 | | |
Transfers | 175,473 | | |
Disposals | (1,355) | | |
Depreciation charge (notes 5, 24, 32.2) | (161,675) | | |
Currency translation differences | 42,467 | | |
Property, plant and equipment | 316,188 | 261,278 | |
In-vehicle devices installed | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Additions | 0 | | |
Depreciation charge (notes 5, 24, 32.2) | 0 | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | 0 | |
In-vehicle devices installed | Gross carrying amount | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 470,545 | 333,057 | |
Currency translation differences | 62,003 | (33,762) | |
Property, plant and equipment | | 470,545 | 333,057 |
Property, plant and equipment retired and removed from accounting records | 55,600 | 63,900 | |
In-vehicle devices installed | Gross carrying amount | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 62,003 | | |
Property, plant and equipment | 654,453 | | |
In-vehicle devices installed | Gross carrying amount | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
In-vehicle devices installed | Accumulated depreciation and impairments | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | (209,267) | (139,109) | |
Currency translation differences | (19,536) | 9,690 | |
Property, plant and equipment | | (209,267) | R (139,109) |
In-vehicle devices installed | Accumulated depreciation and impairments | Owned assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | (19,536) | | |
Property, plant and equipment | (338,265) | | |
In-vehicle devices installed | Accumulated depreciation and impairments | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Currency translation differences | 0 | | |
Property, plant and equipment | 0 | | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 30,568 | | |
Property, plant and equipment | | 30,568 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 30,568 | | |
Property, plant and equipment | | 30,568 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Property | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 29,273 | | |
Property, plant and equipment | | 29,273 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Property | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 29,273 | | |
Property, plant and equipment | | 29,273 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Plant, equipment, vehicles and other | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 1,295 | | |
Property, plant and equipment | | 1,295 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Plant, equipment, vehicles and other | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 1,295 | | |
Property, plant and equipment | | 1,295 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Computer and radio equipment | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Property, plant and equipment | | 0 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | Computer and radio equipment | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Property, plant and equipment | | 0 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | In-vehicle devices uninstalled | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Property, plant and equipment | | 0 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | In-vehicle devices uninstalled | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Property, plant and equipment | | 0 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | In-vehicle devices installed | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | 0 | | |
Property, plant and equipment | | 0 | |
Adjustment on initial application of IFRS 15, IFRS 16 and IFRS 9 | In-vehicle devices installed | Right-of-use assets | | | |
Reconciliation of changes in property, plant and equipment [abstract] | | | |
Property, plant and equipment | R 0 | | |
Property, plant and equipment | | R 0 | |