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Acquisitions (Tables) | 3 Months Ended
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Mar. 31, 2018
Business Combinations [Abstract] |
Business Acquisition, Pro Forma Information [Table Text Block] | The amounts of revenue and income from operations associated with these investments included in the Consolidated Statements of Income, since the February 1, 2018 acquisition date, were as follows:
(In millions) | Two Months Ended March 31, 2018
Revenues and other income | $ | 265 |
Income from operations | 181 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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