| **Investments in and advances to non-consolidated affiliates (Details) (USD $)In Millions, unless otherwise specified** | 12 Months Ended | 11 Months Ended | 12 Months Ended |
|-------------------------------------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|
||
| **Schedule of Equity Method Investments [Line Items]**                                                                  |            |            |            |   |   |
| Sales to affiliates                                                                                                     | $ 25            | $ 107           | $ 121           |   |   |
| Equity Method Investment Summarized Financial Information Undistributed Earnings                                        | (68)            | (32)            |            |   |   |
| Due from Affiliates                                                                                                     | 32              | 30              |            |   |   |
| Equity Method Investment, Summarized Financial Information, Current Assets                                              | 271             | 214             |            |   |   |
| Investments in and Advances to Affiliates, at Fair Value, Gross Additions                                               | 39              | 65              |            |   |   |
| **Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]**                             |            |            |            |   |   |
| Net revenue                                                                                                             | 704             | 938             | 659             | 235 | 63 |
| Net expenses                                                                                                            |            |            |            | 318 | 135 |
| Loss before tax expense                                                                                                 |            |            |            | (83) | (72) |
| Net loss                                                                                                                | (22)            | (131)           | (96)            | (83) | (72) |
| Equity Method Investment, Summarized Financial Information, Cost of Sales, Expenses and Income Tax Expense              | 726             | 1,069           | 755             |   |   |
| Equity Method Investment, Summarized Financial Information, Noncurrent Assets                                           | 199             | 238             |            |   |   |
| Equity Method Investment, Summarized Financial Information, Assets                                                      | 470             | 452             |            |   |   |
| Equity Method Investment, Summarized Financial Information, Current Liabilities                                         | 195             | 118             |            |   |   |
| Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities                                      | 91              | 117             |            |   |   |
| Equity Method Investment, Summarized Financial Information, Liabilities                                                 | 286             | 235             |            |   |   |
| Equity Method Investment, Summarized Financial Information, Equity or Capital                                           | 55              | 73              |            |   |   |
| Equity Method Investment, Summarized Financial Information, Noncontrolling Interest                                     | 129             | 144             |            |   |   |
| Equity Method Investment Summarized Financial Information, Equity                                                       | 184             | 217             |            |   |   |
| Equity Method Investment, Summarized Financial Information, Liabilities and Equity                                      | 470             | 452             |            |   |   |
| Related Party Transaction, Expenses from Transactions with Related Party                                                | 370             | 426             | 394             |   |   |
| Due to Affiliate                                                                                                        | $ 29            | $ 29            |            |   |   |

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| - Definition
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The amount of income (loss) continuing operations before taxes reported by an equity method investment of the entity.
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The total amount of expenses, including cost of sales, reported by an equity method investment of the entity.
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| - Definition
The amount of undistributed earnings of the unconsolidated affiliates included in consolidated retained earnings.
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| - Definition
For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.
+ References
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| - Definition
Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.
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| - Definition
The amount of assets reported by an equity method investment of the entity.
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| - Definition
The amount of current assets reported by an equity method investment of the entity.
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| - Definition
The amount of current liabilities reported by an equity method investment of the entity.
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| - Definition
Amount of equity, including noncontrolling interest, reported by an equity method investment of the entity.
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Amount of equity, excluding noncontrolling interest, attributable to the equity method investment of the entity.
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| - Definition
The amount of liabilities reported by an equity method investment of the entity.
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| - Definition
The amount of liabilities and equity reported by an equity method investment of the entity.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of equity attributable to noncontrolling interests of an equity method investment of the entity.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of net income (loss) reported by an equity method investment of the entity.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of noncurrent assets reported by an equity method investment of the entity.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of noncurrent liabilities reported by an equity method investment of the entity.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.
+ References
No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Gross additions to the investment in and advance to the affiliate.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.
+ References
No definition available.
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