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Long-Term Debt (Sale Leaseback Financing Obligation) (Details) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Apr. 04, 2013 company dealer
Debt Disclosure [Abstract] |  |  |
Number of companies completed sale leaseback transaction | company |  |  | 2
Number of dealer operated sites | dealer |  |  | 50
Sale Leaseback Transaction, Imputed Interest Rate | 5.125% |  |
Sale leaseback financing obligation | $ | $ 116 | $ 117 |

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- Definition The liability due as of the balance sheet date for leasebacks accounted for using the deposit method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6456341&loc=d3e50796-112755 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 + Details
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- Definition The financing cost related to leases that have been recorded under the deposit method, as a financing or as a capital leases in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Imputed Interest Rate -URI http://asc.fasb.org/extlink&oid=6515215 + Details
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