SUPPLEMENTAL GUARANTOR AND NON-GUARANTOR CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,857,096	$ 1,607,570	$ 1,634,194	$ 1,628,408
Accounts receivable	2,162,750	2,044,757
Inventories	3,493,617	3,491,656
Inter company receivable	0	0
Other current assets	1,100,159	1,171,143
Total current assets	8,613,622	8,315,126
Property and equipment, net	2,321,536	2,257,633
Goodwill and other intangible assets, net	1,337,321	1,345,820
Other assets	530,570	466,402
Investment in subsidiaries	0	0
Total assets	12,803,049	12,384,981
Current liabilities:
Bank borrowings and current portion of long-term debt	68,856	65,166
Accounts payable	4,699,734	4,248,292
Accrued payroll	357,922	353,547
Inter company payable	0	0
Other current liabilities	1,751,245	1,905,200
Total current liabilities	6,877,757	6,572,205
Long term liabilities	3,283,795	3,207,246
Flex Ltd. shareholders’ equity (deficit)	2,599,895	2,570,872
Noncontrolling interests	41,602	34,658
Total shareholders’ equity	2,641,497	2,605,530
Total liabilities and shareholders’ equity	12,803,049	12,384,981
Reportable legal entities | Parent
Current assets:
Cash and cash equivalents	943,807	734,869	868,114	608,971
Accounts receivable	0	0
Inventories	0	0
Inter company receivable	10,504,971	9,105,728
Other current assets	5,796	2,951
Total current assets	11,454,574	9,843,548
Property and equipment, net	0	0
Goodwill and other intangible assets, net	1,214	175
Other assets	2,211,872	2,249,145
Investment in subsidiaries	2,562,818	2,815,426
Total assets	16,230,478	14,908,294
Current liabilities:
Bank borrowings and current portion of long-term debt	63,365	58,836
Accounts payable	0	0
Accrued payroll	0	0
Inter company payable	10,728,155	9,562,405
Other current liabilities	28,349	33,008
Total current liabilities	10,819,869	9,654,249
Long term liabilities	2,810,714	2,683,173
Flex Ltd. shareholders’ equity (deficit)	2,599,895	2,570,872
Noncontrolling interests	0	0
Total shareholders’ equity	2,599,895	2,570,872
Total liabilities and shareholders’ equity	16,230,478	14,908,294
Reportable legal entities | Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	63,698	148,201	187,362	168,272
Accounts receivable	815,141	729,331
Inventories	1,521,272	1,482,410
Inter company receivable	7,802,175	5,568,392
Other current assets	187,215	180,842
Total current assets	10,389,501	8,109,176
Property and equipment, net	584,382	553,072
Goodwill and other intangible assets, net	85,894	60,895
Other assets	276,492	267,034
Investment in subsidiaries	3,456,295	3,038,002
Total assets	14,792,564	12,028,179
Current liabilities:
Bank borrowings and current portion of long-term debt	0	946
Accounts payable	1,734,186	1,401,835
Accrued payroll	99,464	114,509
Inter company payable	10,528,081	7,999,335
Other current liabilities	785,866	869,470
Total current liabilities	13,147,597	10,386,095
Long term liabilities	2,042,092	2,063,988
Flex Ltd. shareholders’ equity (deficit)	(397,125)	(421,904)
Noncontrolling interests	0	0
Total shareholders’ equity	(397,125)	(421,904)
Total liabilities and shareholders’ equity	14,792,564	12,028,179
Reportable legal entities | Non-Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	849,591	724,500	578,718	851,165
Accounts receivable	1,347,609	1,315,426
Inventories	1,972,345	2,009,246
Inter company receivable	14,601,712	12,404,722
Other current assets	907,148	987,350
Total current assets	19,678,405	17,441,244
Property and equipment, net	1,737,154	1,704,561
Goodwill and other intangible assets, net	1,250,213	1,284,750
Other assets	2,000,849	2,004,437
Investment in subsidiaries	17,947,038	18,175,348
Total assets	42,613,659	40,610,340
Current liabilities:
Bank borrowings and current portion of long-term debt	5,491	5,384
Accounts payable	2,965,548	2,846,457
Accrued payroll	258,458	239,038
Inter company payable	11,652,622	9,517,102
Other current liabilities	937,030	1,002,722
Total current liabilities	15,819,149	13,610,703
Long term liabilities	2,389,632	2,514,299
Flex Ltd. shareholders’ equity (deficit)	24,363,276	24,450,680
Noncontrolling interests	41,602	34,658
Total shareholders’ equity	24,404,878	24,485,338
Total liabilities and shareholders’ equity	42,613,659	40,610,340
Eliminations
Current assets:
Cash and cash equivalents	0	0	$ 0	$ 0
Accounts receivable	0	0
Inventories	0	0
Inter company receivable	(32,908,858)	(27,078,842)
Other current assets	0	0
Total current assets	(32,908,858)	(27,078,842)
Property and equipment, net	0	0
Goodwill and other intangible assets, net	0	0
Other assets	(3,958,643)	(4,054,214)
Investment in subsidiaries	(23,966,151)	(24,028,776)
Total assets	(60,833,652)	(55,161,832)
Current liabilities:
Bank borrowings and current portion of long-term debt	0	0
Accounts payable	0	0
Accrued payroll	0	0
Inter company payable	(32,908,858)	(27,078,842)
Other current liabilities	0	0
Total current liabilities	(32,908,858)	(27,078,842)
Long term liabilities	(3,958,643)	(4,054,214)
Flex Ltd. shareholders’ equity (deficit)	(23,966,151)	(24,028,776)
Noncontrolling interests	0	0
Total shareholders’ equity	(23,966,151)	(24,028,776)
Total liabilities and shareholders’ equity	$ (60,833,652)	$ (55,161,832)