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v3.10.0.1

Selected Quarterly Financial Results (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 4,074.8 | $ 4,373.2 | $ 4,186.1 | $ 3,606.4 | $ 3,752.1 | $ 3,933.2 | $ 3,891.7 | $ 3,256.0 | $ 16,240.5 | $ 14,832.9 | $ 13,672.7
Gross profit | 693.8 | 713.6 | 695.6 | 603.9 | 613.7 | 642.2 | 640.8 | 553.5 | 2,706.9 | 2,450.2 | 2,328.3
Income (loss) from operations | 242.9 | 274.8 | 265.5 | 204.1 | 221.1 | 244.0 | 230.8 | 170.7 | 987.3 | 866.5 | 820.0
Net income | $ 159.3 | $ 183.7 | $ 173.0 | $ 127.0 | $ 194.8 | $ 129.3 | $ 140.9 | $ 58.2 | $ 643.0 | $ 523.1 | $ 425.1
Earnings per share, basic (in dollars per share) | $ 1.07 | $ 1.22 | $ 1.14 | $ 0.83 | $ 1.28 | $ 0.84 | $ 0.90 | $ 0.36 | $ 4.26 | $ 3.37 | $ 2.60
Earnings per share, diluted (in dollars per share) | 1.05 | 1.20 | 1.12 | 0.82 | 1.25 | 0.83 | 0.89 | 0.36 | 4.19 | 3.31 | 2.56
Cash dividends declared per common share (in dollars per share) | $ 0.295 | $ 0.210 | $ 0.210 | $ 0.210 | $ 0.210 | $ 0.160 | $ 0.160 | $ 0.160 | $ 0.9250 | $ 0.6900 | $ 0.4825
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 1,836.4 | $ 1,706.5 | $ 1,733.8 | $ 1,565.8 | $ 1,599.3 | $ 1,552.8 | $ 1,580.1 | $ 1,440.6 |  |  |
Small Business |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | 362.5 | 340.0 | 329.5 | 327.6 | 308.1 | 305.4 | 315.0 | 292.0 |  |  |
Public |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | 1,414.2 | 1,875.1 | 1,635.4 | 1,230.0 | 1,426.1 | 1,693.9 | 1,632.8 | 1,153.7 |  |  |
Public | Government |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | 546.0 | 639.3 | 493.5 | 418.5 | 619.9 | 591.9 | 523.4 | 374.6 |  |  |
Public | Education |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | 425.0 | 793.1 | 712.1 | 397.2 | 395.2 | 691.3 | 704.9 | 393.2 |  |  |
Public | Healthcare |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | 443.2 | 442.7 | 429.8 | 414.3 | 411.0 | 410.7 | 404.5 | 385.9 |  |  |
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 461.7 | $ 451.6 | $ 487.4 | $ 483.0 | $ 418.6 | $ 381.1 | $ 363.8 | $ 369.7 |  |  |

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