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Accounting Developments Accounting Developments (Tables) | 3 Months Ended
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Mar. 31, 2018
Accounting Changes and Error Corrections [Abstract] |
Accounting Updates Adopted in 2018 | Summary of Financial Statement Impacts of Accounting Updates Adopted in 2018:
| For the Three Months Ended March 31, 2017
| Historical Accounting Method |  | As Adjusted |  | Effect of Change
| (in millions of dollars)
Adjustments due to ASC 230 |  |  |  |  |
Consolidated Statements of Cash Flow |  |  |  |  |
Cash Flows from Operating Activities |  |  |  |  |
Other, Net | $ | 2.2 |  |  | $ | 4.4 |  |  | $ | 2.2 |
Cash Flows from Investing Activities |  |  |  |  |
Proceeds from Sales and Maturities of Other Investments | 48.7 |  |  | 46.5 |  |  | (2.2 | )
Adjustments due to ASC 715 |  |  |  |  |
Consolidated Statements of Income |  |  |  |  |
Compensation Expense | 207.0 |  |  | 209.0 |  |  | 2.0 |
Other Expenses | 230.8 |  |  | 228.8 |  |  | (2.0 | )
| Balance at December 31, 2017 |  | Balance at January 1, 2018 |  | Effect of Change
| (in millions of dollars)
Adjustments due to ASC 825 |  |  |  |  |
Consolidated Balance Sheets |  |  |  |  |
Assets |  |  |  |  |
Other Long-term Investments | $ | 646.8 |  |  | $ | 643.0 |  |  | $ | (3.8 | )
Liabilities |  |  |  |  |
Deferred Income Tax | 199.0 |  |  | 198.2 |  |  | (0.8 | )
Stockholders' Equity |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) | 127.5 |  |  | 110.0 |  |  | (17.5 | )
Retained Earnings | 9,542.2 |  |  | 9,556.7 |  |  | 14.5 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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