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Lines of Credit and Financing Arrangements (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Outstanding debt obligations | The following tables summarize our outstanding debt obligations and the classification in the accompanying Consolidated Balance Sheets (in millions):
| As of December 31,
| 2018 |  | 2017
Short-Term Debt: |  |  |
Foreign obligations | $ | — |  |  | $ | 0.9 |
Total short-term debt | $ | — |  |  | $ | 0.9 |
Current maturities of long-term debt: |  |  |
Asset Securitization Program | $ | 268.0 |  |  | $ | — |
Capital lease obligations | 3.5 |  |  | 3.2 |
Domestic credit facility | 30.0 |  |  | 30.0 |
Debt issuance costs | (0.7 | ) |  | (0.6 | )
Total current maturities of long-term debt | $ | 300.8 |  |  | $ | 32.6 |
Long-Term Debt: |  |  |
Asset Securitization Program | $ | — |  |  | $ | 276.0 |
Capital lease obligations | 15.7 |  |  | 11.9 |
Domestic credit facility | 378.0 |  |  | 337.0 |
Senior unsecured notes | 350.0 |  |  | 350.0 |
Debt issuance costs | (3.2 | ) |  | (4.4 | )
Total long-term debt | $ | 740.5 |  |  | $ | 970.5 |
Total debt | $ | 1,041.3 |  |  | $ | 1,004.0 |
Aggregate amounts of required principal payments on total debt | As of December 31, 2018, the aggregate amounts of required principal payments on total debt were as follows (in millions):
2019 | $ | 301.5 |
2020 | 32.6 |
2021 | 349.3 |
2022 | 0.1 |
2023 | 350.0 |
Thereafter | 11.7 |
Eligible amounts available and beneficial interests sold | The eligible amounts available and beneficial interests sold were as follows (in millions):
| As of December 31,
| 2018 |  | 2017
Eligible amount available under the ASP on qualified accounts receivable | $ | 290.0 |  |  | $ | 290.0 |
Less: Beneficial interest transferred | (268.0 | ) |  | (276.0 | )
Remaining amount available | $ | 22.0 |  |  | $ | 14.0 |
Summary of weighted average borrowing rate facility | Our weighted average borrowing rate on the facility was as follows:
| As of December 31,
| 2018 |  | 2017
Weighted average borrowing rate | 3.74 | % |  | 2.76 | %
Required ratios under the domestic credit facility | The required ratios under our Domestic Credit Facility are detailed below:
Consolidated Indebtedness to Adjusted EBITDA Ratio no greater than | 3.5 : 1.0
Cash Flow to Interest Expense Ratio no less than | 3.0 : 1.0

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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