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Material breach cure period

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Ownership Percentage Transferred

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The percentage ownership of equity in the investee.

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Total equity from shareholders' initial capital contribution

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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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.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value portion of investments accounted under the cost method.

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Amount of investment in equity security without readily determinable fair value.

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Fair value of the amount outstanding under the credit facility.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Recent Transactions and Events (Details) $ in Millions			1 Months Ended	3 Months Ended
Recent Transactions and Events (Details) $ in Millions	May 06, 2020 USD ($)	Jan. 02, 2019	Apr. 29, 2020	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 30, 2020 USD ($)	Oct. 30, 2019	May 31, 2019 USD ($)
Business Acquisition [Line Items]
Asset impairment cost				$ 9	$ 0
Payments for business acquired				2	10
Delphi Technologies PLC
Business Acquisition [Line Items]
Delphi Technologies' draw on credit facility						$ 500
Romeo Systems, Inc.
Business Acquisition [Line Items]
Payments for investments in equity securities								$ 50
Rinehart Motion Systems LLC and AM Racing LLC
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Jan. 02, 2019
Business Combination, Consideration Transferred					15
Payments for business acquired				2	$ 10
Business Combination, Contingent Consideration, Liability				$ 3
Romeo Systems, Inc.
Business Acquisition [Line Items]
Ownership Percentage in Investee				20.00%
Asset impairment cost				$ 9
Cost method investment fair value				41
BorgWarner Romeo Power LLC [Member]
Business Acquisition [Line Items]
Total equity from shareholders' initial capital contribution				$ 10
BorgWarner Romeo Power LLC [Member]
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent				60.00%
Subsequent Event [Member] \| Delphi Technologies PLC
Business Acquisition [Line Items]
Material breach cure period			30 days
Subsequent Event [Member] \| Forecast [Member] \| Delphi Technologies PLC
Business Acquisition [Line Items]
Delphi Technologies revised exchange ratio	0.4307
Maximum amount of line of credit facility outstanding, net of cash balances	$ 115
Line of credit facility, maximum amount outstanding	$ 225
Ownership percentage of combined company	85.00%
Subsequent Event [Member] \| Forecast [Member] \| Delphi Technologies PLC \| Delphi Technologies PLC
Business Acquisition [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	15.00%
BorgWarner Morse TEC LLC [Member]
Business Acquisition [Line Items]
Ownership percentage transferred							100.00%