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Quarterly Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2012
Quarterly Data (Unaudited) [Abstract] |
Quarterly data |
|  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |  | Total |
Year Ended December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  | $ | 5,096.4 |  | $ | 5,206.7 |  | $ | 5,172.3 |  | $ | 5,202.6 |  | $ | 20,678.0 |
Gross profit |  |  | 847.4 |  |  | 861.7 |  |  | 856.2 |  |  | 876.7 |  |  | 3,442.0 |
Operating profit(a) |  |  | 93.8 |  |  | 94.4 |  |  | 118.6 |  |  | 104.9 |  |  | 411.7 |
Net earnings |  |  | 40.2 |  |  | 41.0 |  |  | 63.1 |  |  | 53.3 |  |  | 197.6 |
Net earnings per share — basic |  | $ | 0.50 |  | $ | 0.51 |  | $ | 0.79 |  | $ | 0.68 |  | $ | 2.49 |
Net earnings per share — diluted(b) |  |  | 0.50 |  |  | 0.51 |  |  | 0.79 |  |  | 0.68 |  |  | 2.47 |
Dividends per share |  |  | — |  |  | 0.43 |  |  | — |  |  | 0.43 |  |  | 0.86 |
Market price: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 47.37 |  | $ | 47.90 |  | $ | 41.65 |  | $ | 42.93 |  |  |  |
Low |  |  | 36.76 |  |  | 33.99 |  |  | 32.41 |  |  | 35.18 |  |  |  |
Year Ended December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from services |  | $ | 5,072.4 |  | $ | 5,667.3 |  | $ | 5,782.3 |  | $ | 5,484.0 |  | $ | 22,006.0 |
Gross profit |  |  | 857.6 |  |  | 962.2 |  |  | 951.3 |  |  | 935.2 |  |  | 3,706.3 |
Operating profit(c) |  |  | 85.6 |  |  | 150.8 |  |  | 158.0 |  |  | 129.8 |  |  | 524.2 |
Net earnings |  |  | 35.7 |  |  | 72.7 |  |  | 79.6 |  |  | 63.6 |  |  | 251.6 |
Net earnings per share — basic |  | $ | 0.44 |  | $ | 0.89 |  | $ | 0.97 |  | $ | 0.79 |  | $ | 3.08 |
Net earnings per share — diluted(d) |  |  | 0.43 |  |  | 0.87 |  |  | 0.97 |  |  | 0.78 |  |  | 3.04 |
Dividends per share |  |  | — |  |  | 0.40 |  |  | — |  |  | 0.40 |  |  | 0.80 |
Market price: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 68.67 |  | $ | 68.14 |  | $ | 58.62 |  | $ | 45.92 |  |  |  |
Low |  |  | 58.60 |  |  | 52.37 |  |  | 32.32 |  |  | 32.63 |  |  |  |
(a) | Included reorganization charges of $0.1, $20.9, $1.2 and $26.6 recorded in the first, second, third and fourth quarters, respectively.
(b) | Included in the results are reorganization costs of ($0.17) per diluted share in the second quarter and ($0.23) per diluted share in the fourth quarter.
(c) | Included reorganization charges of $0.2, $1.4, $0.5 and $21.0 recorded in the first, second, third and fourth quarters, respectively.
(d) | Included in the results are reorganization costs of ($0.02) per diluted share in the second quarter and ($0.20) per diluted share in the fourth quarter.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306 + Details
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