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Financing Arrangements and Derivative Financial Instruments - Long Term Debt and Finance Leases, Net of Unamortized Discounts, and Interest Rates (Parenthetical) (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Aug. 16, 2020 | May 18, 2020 | Dec. 31, 2019
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Non-cash financing additions | $ 3 |  |  |
8.75% Due 2020 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 8.75% | 8.75% |  | 8.75%
5.125% due 2023 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 5.125% |  |  | 5.125%
3.75% Euro Notes due 2023 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 3.75% |  |  |
3.75% Euro Notes due 2023 | Euro Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 3.75% |  |  | 3.75%
9.5% due 2025 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 9.50% |  | 9.50% | 9.50%
5% due 2026 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 5.00% |  |  | 5.00%
4.875% due 2027 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 4.875% |  |  | 4.875%
7% due 2028 | Senior Notes |  |  |  |
Long-term Debt and Lease Obligation [Abstract] |  |  |  |
Interest rate, stated percentage | 7.00% |  |  | 7.00%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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