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Receivables (Details) |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 30, 2012 USD ($) | Jun. 30, 2019 USD ($) agreement | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Schedule Of Financial Receivables [Line Items] |  |  |  |
Number of arrangement with different financial institution to sell customer receivables | agreement |  | 3 |  |
Funding of customer receivables sold |  | $ 0 |  |
Sale of customer receivables | $ 304,000,000 |  |  |
Cash received for receivables | 50,000,000 | 417,000,000 | $ 420,000,000 |
Deferred purchase program receivable | $ 254,000,000 | 426,000,000 |  | $ 234,000,000
Net cash funding received during the period |  | 300,000,000 |  |
Amount of cash draws under arrangement during the period |  | 3,258,000,000 |  |
Amount of cash repayments under arrangement during the period |  | (2,958,000,000) |  |
Amount of cash draws under arrangement since inception |  | 300,000,000 |  |
Amount of cash repayments under arrangement since inception |  | (300,000,000) |  |
Gross amount of receivables sold |  | 45,626,000,000 |  |
Cash collections of other receivables |  | 44,921,000,000 |  |
Maximum |  |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |  |
Funding of customer receivables sold |  | $ 400,000,000 |  |

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- Definition Repayments for receivable funding during the period. + References No definition available. + Details
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- Definition Amount of cash inflow from the collection of receivables classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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