| **Restructuring (Details) (USD $)In Millions, unless otherwise specified**                                                                                             | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended |        |        | 12 Months Ended |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|-----------------|----------------|--------|--------|-----------------|
||
| **Restructuring Cost and Reserve [Line Items]**                                                                                                                        |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Restructuring charges (benefit)                                                                                                                                        | $ 92            |                | $ (15)          |                | $ 59            |                |            |           | $ 59            |           | $ 29            | $ 9            |            |           |            |           |            |           |            |           | $ (17)          |           |            | $ 29           |   |   |            | $ 13 | $ 5 | $ 7 | $ 6 |   | $ 4 | $ 21 | $ 7 | $ 4 | $ 33 | $ 4 | $ 16 | $ (4) |   | $ 9 | $ 48 | $ 10 | $ 58 | $ 59 |   | $ 8 | $ (16) |   | $ 21 |   |   |   |   |   |   |   |   |
| Other related restructuring charges                                                                                                                                    |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            | 35             |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Expected restructuring and related charges                                                                                                                             |            |                |            |                |            |                |            |           |            |           |            |           |            |           | 30              | 70             |            |           | 10              | 20             |            |           |            |           | 70     | 90     |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Length of payment period (years)                                                                                                                                       |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            | 2 years        |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Impairment of Long-Lived Assets Held-for-use                                                                                                                           |            |                |            |                |            |                |            |           |            |           |            |           | 8               | 26             |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Impairment of Intangible Assets (Excluding Goodwill)                                                                                                                   |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           | 51              |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Proceeds from Legal Settlements                                                                                                                                        |            |                |            |                |            |                | 200             |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Warranty liability reversed                                                                                                                                            | 0               | [1]            | 0               | [1]            | 75              | [1]            | 75              |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Noncontrolling Interest, Ownership Percentage by Parent                                                                                                                |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 75.00% | 75.00% |   |   |   |   |   |
| Business Acquisition, Preexisting Relationship, Gain (Loss) Recognized                                                                                                 |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 23 |   |   |   |   |   |   |   |
| Valuation Allowances and Reserves, Charged to Cost and Expense                                                                                                         |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 105 | 81 | 24 |
| Warranty Recoveries                                                                                                                                                    |            |                |            |                |            |                |            | 29             | 29              |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 3 | 26 |   |   |   |
| Valuation Allowances and Reserves, Adjustments                                                                                                                         |            |                |            |                |            |                |            | 27             |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Payments for Legal Settlements                                                                                                                                         |            |                |            |                |            |                |            | 18             |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Gain (Loss) Related to Litigation Settlement                                                                                                                           |            |                |            |                |            |                |            | 2              |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Restructuring Reserve [Roll Forward]**                                                                                                                               |            |                |            |                |            |                |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |            |           |   |   |            |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Restructuring liability, balance at beginning of period                                                                                                                |            |                |            |                |            |                |            |           |            | 5              |            |           |            |           |            |           |            |           |            |           | 41              | 41             |            |           |   |   | 5               |   |   |   |   | 20 |   |   |   |   |   |   |   |   | 0 |   |   |   |   |   | 0 |   | 21 | 21 |   |   |   |   |   |   |   |   |   |
| Additions                                                                                                                                                              |            |                |            |                |            |                |            |           |            | 48             |            |           |            |           |            |           |            |           |            |           |            | 0              |            |           |   |   | 31              |   |   |   |   | 0 |   |   |   |   |   |   |   |   | 9 |   |   |   |   |   | 8 |   |   | 0 |   |   |   |   |   |   |   |   |   |
| Payments                                                                                                                                                               |            |                |            |                |            |                |            |           |            | (14)           |            |           |            |           |            |           |            |           |            |           |            | (17)           |            |           |   |   | (5)             |   |   |   |   | (12) |   |   |   |   |   |   |   |   | (9) |   |   |   |   |   | 0 |   |   | (5) |   |   |   |   |   |   |   |   |   |
| Adjustments                                                                                                                                                            |            |                |            |                |            |                |            |           |            | 0              |            |           |            |           |            |           |            |           |            |           |            | (24)           | (6)             |           |   |   | 0               |   |   |   |   | (8) |   | 3 |   |   |   |   |   |   | 0 |   |   |   |   |   | 0 |   |   | (16) |   |   |   |   |   |   |   |   |   |
| Restructuring liability, balance at end of period                                                                                                                      |            |                |            |                |            |                |            |           |            | $ 39           |            |           |            |           |            |           |            |           |            |           |            | $ 0            |            |           |   |   | $ 31            |   |   |   |   | $ 0 |   |   |   |   |   |   |   |   | $ 0 |   |   |   |   |   | $ 8 |   |   | $ 0 |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                        |
| [1]See Note 2, Restructurings and impairments, under Ford related restructuring activity for discussion regarding warranty adjustments related to the Ford Settlement. |

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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Income (expense) and gain (loss) recognized from the settlement of a preexisting relationship between the acquirer and the acquiree.
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| - Definition
The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation  liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.
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| - Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.
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| - Definition
The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).
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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.
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| - Definition
The amount of cash paid for the settlement of litigation or for other legal issues during the period.
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| - Definition
Cash received for the settlement of litigation during the current period.
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| - Definition
Amount expected to be charged against earnings in the current and future periods for the specified restructuring cost.
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Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.
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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
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| - Definition
Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.
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Reserve increase representing the amount charged against earnings in the period for a specified incurred and estimated type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
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Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.
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Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.
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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses.
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