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Supplemental Data (unaudited) Supplemental Data (unaudited) | 12 Months Ended
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Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Additional Financial Information Disclosure [Text Block] | Supplemental data under senior note indentures (unaudited) The Company previously disclosed certain unaudited supplemental data concerning entities that do not constitute “Subsidiaries” as defined in the indentures governing the Company’s senior notes with its consolidated financial statements, as required by those indentures. As a result of the sale of the DMG business to Optum on June 19, 2019, the Company no longer has subsidiaries large enough to require this additional unaudited supplemental disclosure under the terms of its senior note indentures.

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