Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
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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.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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Carrying value as of the balance sheet date of the portion of long-term notes having the highest claim on the assets of the issuer in case of bankruptcy or liquidation, due within one year or the normal operating cycle, if longer. Senior note holders are paid off in full before any payments are made to debt holders having a lesser priority of repayment.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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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(19)(a))
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Section S99
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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Debt - Components (Details) - USD ($) $ in Millions	Jun. 30, 2017	Jan. 31, 2017	Dec. 31, 2016
Short-term debt:
Total short-term debt	$ 1,114		$ 1,715
Long-term debt:
Senior notes, net of unamortized discounts and debt issuance costs of $72 and $76, respectively	9,878		9,874
Other long-term debt	162		250
Total long-term debt	10,040		10,124
Total debt	11,154		11,839
Other long-term debt
Long-term debt:
Other long-term debt	$ 3		$ 3
Commercial paper notes
Long-term debt:
Weighted average interest rate, long-term	2.00%		1.60%
Other long-term debt	$ 159		$ 247
Senior notes
Long-term debt:
Unamortized discounts and debt issuance costs	72		76
Senior notes, net of unamortized discounts and debt issuance costs of $72 and $76, respectively	$ 9,878		$ 9,874
Commercial paper notes
Short-term debt:
Weighted average interest rate, short-term	2.00%		1.60%
Short-term debt	$ 677		$ 563
Other
Short-term debt:
Total short-term debt	$ 137		$ 2
Senior secured hedged inventory facility \| Credit facility
Short-term debt:
Weighted average interest rate, short-term	2.30%		1.80%
Short-term debt	$ 300		$ 750
6.13% senior notes due January 2017 \| Senior notes
Short-term debt:
Debt instrument, interest rate		6.13%	6.13%
Senior notes, current			$ 400
6.50% senior notes due May 2018 \| Senior notes
Short-term debt:
Debt instrument, interest rate	6.50%