Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Notes and Loans Payable [Abstract]
Long-term Debt, Gross	$ 351		$ 356
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(3)		(4)
Long-term debt	348		352
Current portion of long-term debt	0		(5)
Long term debt, Gross, Noncurrent	351		351
Long-term debt, excluding current portion	348		347
Senior unsecured notes, maturing 2024 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 350
Notes and Loans Payable [Abstract]
Debt, interest rate, stated percentage	4.875%
Long-term Debt, Gross	$ 350		350
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(3)		(4)
Long-term debt	347		346
Chilean term credit facility, maturing 2019 [Member]
Notes and Loans Payable [Abstract]
Long-term Debt, Gross	0		5
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	0		0
Long-term debt	0		5
Other Debt Obligations [Member]
Notes and Loans Payable [Abstract]
Long-term Debt, Gross	1		1
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net		$ 0	0
Long-term debt	$ 1		$ 1

Long term debt, Gross, Noncurrent

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Face (par) amount of debt instrument at time of issuance.

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- Definition

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

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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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Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

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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.

+ References

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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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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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