DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - DERIVATIVE POSITIONS (Details) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2020 USD ($) MMBTU day t	Dec. 31, 2019 USD ($) MMBTU day t
Interest rate \| Long \| Swaps
Derivative
Notional amount of derivative	$ 2,236	$ 4,062
Interest rate \| Long \| Forward Rate Agreements
Derivative
Notional amount of derivative	180	213
Interest rate \| Short \| Swaps
Derivative
Notional amount of derivative	625	39
Interest rate \| Short \| Forward Rate Agreements
Derivative
Notional amount of derivative	180	418
Foreign exchange \| Long \| Swaps
Derivative
Notional amount of derivative	471	191
Foreign exchange \| Long \| Forwards
Derivative
Notional amount of derivative	11,780	7,164
Foreign exchange \| Long \| Futures
Derivative
Notional amount of derivative	28	0
Foreign exchange \| Long \| Options
Derivative
Delta	135	132
Foreign exchange \| Short \| Swaps
Derivative
Notional amount of derivative	447	170
Foreign exchange \| Short \| Forwards
Derivative
Notional amount of derivative	13,526	9,983
Foreign exchange \| Short \| Futures
Derivative
Notional amount of derivative	0	16
Foreign exchange \| Short \| Options
Derivative
Delta	$ 194	$ 157
Commodities \| Long \| Swaps
Derivative
Nonmonetary notional amount of derivatives \| t	0	0
Commodities \| Long \| Forwards
Derivative
Nonmonetary notional amount of derivatives \| t	42,058,200	27,914,141
Commodities \| Long \| Futures
Derivative
Nonmonetary notional amount of derivatives \| t	0	0
Commodities \| Long \| Options
Derivative
Nonmonetary notional amount of derivatives \| t	0	0
Commodities \| Short \| Swaps
Derivative
Nonmonetary notional amount of derivatives \| t	0	1,114,704
Commodities \| Short \| Forwards
Derivative
Nonmonetary notional amount of derivatives \| t	43,113,078	25,321,595
Commodities \| Short \| Futures
Derivative
Nonmonetary notional amount of derivatives \| t	12,165,453	1,960,051
Commodities \| Short \| Options
Derivative
Nonmonetary notional amount of derivatives \| t	574,239	115,232
Ocean freight \| Long \| Forwards
Derivative
Nonmonetary notional amount of derivatives \| day	7,878	0
Ocean freight \| Long \| Options
Derivative
Nonmonetary notional amount of derivatives \| day	285	42
Ocean freight \| Short \| Forwards
Derivative
Nonmonetary notional amount of derivatives \| day	0	133
Ocean freight \| Short \| Options
Derivative
Nonmonetary notional amount of derivatives \| day	0	0
Natural gas \| Long \| Swaps
Derivative
Nonmonetary notional amount of derivatives \| MMBTU	525,118	215,640
Natural gas \| Long \| Futures
Derivative
Nonmonetary notional amount of derivatives \| MMBTU	10,985,000	2,802,500
Natural gas \| Short \| Swaps
Derivative
Nonmonetary notional amount of derivatives \| MMBTU	0	0
Natural gas \| Short \| Futures
Derivative
Nonmonetary notional amount of derivatives \| MMBTU	0	0
Energy - other \| Long \| Swaps
Derivative
Nonmonetary notional amount of derivatives \| t	429,703	239,836
Energy - other \| Long \| Forwards
Derivative
Nonmonetary notional amount of derivatives \| t	5,534,290	5,534,290
Energy - other \| Long \| Futures
Derivative
Nonmonetary notional amount of derivatives \| t	1,074	0
Energy - other \| Short \| Swaps
Derivative
Nonmonetary notional amount of derivatives \| t	0	0
Energy - other \| Short \| Forwards
Derivative
Nonmonetary notional amount of derivatives \| t	0	0
Energy - other \| Short \| Futures
Derivative
Nonmonetary notional amount of derivatives \| t	0	0
Other \| Long \| Swaps and futures
Derivative
Notional amount of derivative	$ 20	$ 50
Other \| Short \| Swaps and futures
Derivative
Notional amount of derivative	0	14
Fair Value Hedging \| Interest rate
Derivative
Carrying value of hedged debt	2,782	2,279
Cumulative adjustment to long-term debt from application of hedge accounting	104	37
Notional amount of derivative	2,687	2,249
Fair Value Hedging \| Foreign exchange
Derivative
Carrying value of hedged debt	291	281
Notional amount of derivative	291	281
Cash Flow Hedges \| Foreign exchange
Derivative
Amounts expected to be reclassified from AOCI to earnings in the next twelve months	(3)
Cash Flow Hedges \| Foreign exchange \| Forwards
Derivative
Notional amount of derivative	159	99
Cash Flow Hedges \| Foreign exchange \| Options
Derivative
Notional amount of derivative	115	75
Net Investment Hedges
Derivative
Carrying value of non-derivative hedging instrument	933	895
Net Investment Hedges \| Foreign exchange
Derivative
Notional amount of derivative	$ 1,698	$ 928

This element represents delta equivalent amount of foreign currency derivatives.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Derivative, Nonmonetary Notional Amount, Duration

+ References

No definition available.

+ Details

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Namespace Prefix:	bg_
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Period Type:	duration

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994

+ Details

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Period Type:	duration

- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

+ Details

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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- Definition

Nominal mass used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:massItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

+ Details

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- Definition

Nominal or face amount used to calculate payments on a nonderivative instrument.

+ References

No definition available.

+ Details

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