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Financing Arrangements - Maturities (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Long-term debt maturities |  |
Long-term debt | $ 1,931 | $ 1,744
Guaranteed obligations of consolidated subsidiaries | 57 | $ 56
Long-term debt maturing in 2020 |  |
Long-term debt maturities |  |
Long-term debt | 600 |
Long-term debt maturing in 2026 |  |
Long-term debt maturities |  |
Long-term debt | 500 |
Long-term debt maturing in 2037 |  |
Long-term debt maturities |  |
Long-term debt | 250 |
Long-term debt maturing in 2019 |  |
Long-term debt maturities |  |
Long-term debt | $ 165 |

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