Debt Obligations (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Due Within One Year	$ 3,875	$ 3,716
Long-term debt	94	99
ABL Facility [Domain]
Debt Instrument [Line Items]
Due Within One Year	296	137
Long-term debt	0	0
6.625% First Priority Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Due Within One Year	1,550	1,550
Long-term debt	$ 0
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]
Debt Instrument [Line Items]
Due Within One Year	$ 315	$ 315
Long-term debt	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	10.00%	10.00%
10.375% First-Priority Senion Secured Notes due 2022 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 560	$ 560
Long-term debt	$ 0	$ 0
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]
Debt Instrument [Line Items]
Due Within One Year	$ 225	$ 225
Long-term debt	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	13.75%	13.75%
9.00% Second-Priority Senior Secured Notes Due 2020 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 574	$ 574
Long-term debt	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	9.00%	9.00%
Debt Instrument, Maturity Date	Nov. 15, 2020
9.2% Debentures Due 2021 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 74	$ 74
Long-term debt	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	9.20%	9.20%
Debt Instrument, Maturity Date	Mar. 15, 2021
7.875% Debentures Due 2023 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 189	$ 189
Long-term debt	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	7.875%	7.875%
Debt Instrument, Maturity Date	Feb. 15, 2023
Australia Facility Due 2021 [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 4	$ 4
Long-term debt	$ 30	30
Debt Instrument, Maturity Date	Dec. 05, 2021
Brazilian Bank Loans [Member]
Debt Instrument [Line Items]
Due Within One Year	$ 42	41
Long-term debt	11	12
Capital Leases [Member]
Debt Instrument [Line Items]
Due Within One Year	9	10
Long-term debt	52	56
Other [Member]
Debt Instrument [Line Items]
Due Within One Year	37	37
Long-term debt	$ 1	$ 1

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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