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Financing Arrangements (Details) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Short-term Debt [Line Items] |  |
Total notes payable | $ 834 | $ 34
Commercial paper |  |
Short-term Debt [Line Items] |  |
Total notes payable | 735 | 0
Short-term borrowings to banks |  |
Short-term Debt [Line Items] |  |
Total notes payable | $ 99 | $ 34

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