Debt Obligations Level 4 (Details) Debt Outstanding - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Synthetic Letter of Credit Facility	$ 47
ABL Facility [Domain]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	165
Non-Affiliated Debt [Abstract]
Long-term Debt	0	$ 81
Due Within One Year	137	0
6.625% First Priority Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Premium	1	2
Non-Affiliated Debt [Abstract]
Long-term Debt	0	1,552
Due Within One Year	$ 1,550	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	6.625%	6.625%
Debt Instrument, Maturity Date	Apr. 15, 2020
10.00% First Priority Senior Notes Due 2020 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ 315
Due Within One Year	$ 315	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	10.00%	10.00%
Debt Instrument, Maturity Date	Apr. 15, 2020
10.375% First-Priority Senion Secured Notes due 2022 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ 560
Due Within One Year	$ 560	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	10.375%	10.375%
Debt Instrument, Maturity Date	Feb. 01, 2022
13.75% Senior Secured Notes due 2022 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ 225
Due Within One Year	$ 225	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	13.75%	13.75%
Debt Instrument, Maturity Date	Feb. 01, 2022
9.00% Second-Priority Senior Secured Notes Due 2020 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ 574
Due Within One Year	$ 574	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	9.00%	9.00%
Debt Instrument, Maturity Date	Nov. 15, 2020
9.2% Debentures Due 2021 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ 74
Due Within One Year	$ 74	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	9.20%	9.20%
Debt Instrument, Maturity Date	Mar. 15, 2021
7.875% Debentures Due 2023 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ 189
Due Within One Year	$ 189	$ 0
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	7.875%	7.875%
Debt Instrument, Maturity Date	Feb. 15, 2023
Australia Facility Due 2021 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 30
Due Within One Year	4
Affiliated Debt [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 7
Debt Instrument, Interest Rate, Stated Percentage	4.80%
Australia Facility Due 2017 [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt		$ 0
Due Within One Year		$ 50
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage		4.60%
Brazilian Bank Loans [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 12	$ 9
Due Within One Year	$ 41	$ 34
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	10.00%	9.90%
Capital Leases [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 56	$ 44
Due Within One Year	10	5
Other [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	1	2
Due Within One Year	$ 37	$ 36
Affiliated Debt [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	5.30%	5.00%
Unamortized debt issuance costs [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	$ 0	$ (41)
Unamortized debt issuance costs
Non-Affiliated Debt [Abstract]
Due Within One Year	0	0
Total non-affiliated debt [Member]
Non-Affiliated Debt [Abstract]
Long-term Debt	99	3,584
Due Within One Year	$ 3,716	$ 125

Affiliated Debt [Abstract]

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- Definition

Non-Affiliated Debt [Abstract]

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No definition available.

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- Definition

synthetic letter of credit facility

+ References

No definition available.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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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No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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Amount, after accumulated amortization, of debt premium.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Balance Type:	credit
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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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