Financing Agreements - Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total	$ 1,592		$ 1,659
Less: current maturities	26		46
Total long-term debt	$ 1,566		$ 1,613
Senior Notes Due February 2019 [Member]
Debt Instrument [Line Items]
Interest rate	6.50%		6.50%
Total	$ 0		$ 55
Senior Notes Due February 2021 [Member]
Debt Instrument [Line Items]
Interest rate	6.75%		6.75%
Total	$ 350		$ 350
Senior Notes Due September 2021 [Member]
Debt Instrument [Line Items]
Interest rate	5.375%		5.375%
Total	$ 450		$ 450
Senior Notes Due September 2023 [Member]
Debt Instrument [Line Items]
Interest rate	6.00%		6.00%
Total	$ 300		$ 300
Senior Notes Due December 2024 [Member]
Debt Instrument [Line Items]
Interest rate	5.50%	5.50%	5.50%
Total	$ 425		$ 425
Other indebtedness [Member]
Debt Instrument [Line Items]
Total	$ 67		$ 79

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

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+ References

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 6

-Section H

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt and capital lease obligations including current maturities.

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