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Debt and Credit Agreements (Long-term Debt Instruments) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 25, 2015 | Dec. 26, 2014
Debt Instrument [Line Items] |  |
Subtotal Long-term Debt (including current portion) | $ 10,703 | $ 9,742
Less Debt Due within One Year | (20) | (228)
Long-term Debt (excluding current portion) | $ 10,683 | 9,514
Notes [Member] |  |
Debt Instrument [Line Items] |  |
Average Interest Rates (in hundredths) | 5.20% |
Subtotal Long-term Debt (including current portion) | $ 10,445 | 9,456
Equipment Obligations [Member] |  |
Debt Instrument [Line Items] |  |
Average Interest Rates (in hundredths) | 6.30% |
Subtotal Long-term Debt (including current portion) | $ 250 | 277
Capital Leases [Member] |  |
Debt Instrument [Line Items] |  |
Average Interest Rates (in hundredths) | 15.00% |
Subtotal Long-term Debt (including current portion) | $ 7 | 8
Convertible Debt [Member] |  |
Debt Instrument [Line Items] |  |
Average Interest Rates (in hundredths) | 1.00% |
Subtotal Long-term Debt (including current portion) | $ 1 | $ 1

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- Definition 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. + References 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 + Details
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- Definition The average effective interest rate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition 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 + Details
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- Definition Amount of long-term debt and capital leases due within one year or 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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