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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement [Abstract] |  |  |
Operating revenue | $ 3,362.2 | $ 3,144.9 | $ 2,663.6
Operating expenses: |  |  |
Cost of services (exclusive of depreciation and amortization below) | 1,210.7 | 1,113.4 | 887.4
Selling, general and administrative expenses | 1,039.1 | 948.2 | 884.3
Depreciation and amortization | 287.8 | 265.4 | 198.0
Total operating expenses | 2,537.6 | 2,327.0 | 1,969.7
Operating income | 824.6 | 817.9 | 693.9
Interest expense | (92.8) | (92.1) | (63.8)
Other income, net | 14.8 | 2.4 | 6.5
Consolidated income before income taxes | 746.6 | 728.2 | 636.6
Provision for income taxes | (148.6) | (233.1) | (201.8)
Consolidated net income | 598.0 | 495.1 | 434.8
Less: Net income attributable to noncontrolling interests including redeemable noncontrolling interests | (10.7) | (6.3) | (5.7)
Net income attributable to Equifax | $ 587.3 | $ 488.8 | $ 429.1
Basic earnings per common share: |  |  |
Net income attributable to Equifax (in dollars per share) | $ 4.89 | $ 4.10 | $ 3.61
Weighted-average shares used in computing basic earnings per share (in shares) | 120.1 | 119.3 | 118.7
Diluted earnings per common share: |  |  |
Net income attributable to Equifax (in dollars per share) | $ 4.83 | $ 4.04 | $ 3.55
Weighted-average shares used in computing diluted earnings per share (in shares) | 121.5 | 121.1 | 120.9
Dividends per common share (in dollars per share) | $ 1.56 | $ 1.32 | $ 1.16

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