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Net Earnings per Common Share - Calculation of Basic and Diluted Net Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | [1] | Sep. 30, 2016 | [1] | Jun. 30, 2016 | [1] | Mar. 31, 2016 | [1] | Dec. 31, 2015 | [2] | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings available to common stockholders |  | $ 171.1 |  | $ 163.3 |  | $ 49.6 |  | $ 102.4 |  | $ 123.5 |  | $ 86.6 |  | $ 28.1 |  | $ 97.2 |  | $ 486.4 |  | $ 335.4 | [3],[4] | $ 258.1 | [3],[4],[5]
Distributed and allocated undistributed net earnings to non- vested restricted stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3.4) |  | (2.2) |  | (1.6) |
Distributed and allocated undistributed net earnings to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 483.0 |  | 333.2 |  | 256.5 |
Distributed net earnings - dividends paid to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (118.7) |  | (106.2) |  | (110.1) |
Allocation of undistributed net earnings to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 364.3 |  | $ 227.0 |  | $ 146.4 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding - basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 194.3 |  | 203.9 |  | 210.0 |
Basic net earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed net earnings to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.61 |  | $ 0.52 |  | $ 0.52 |
Allocated undistributed net earnings to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.87 |  | 1.11 |  | 0.70 |
Net earnings per common share - basic |  | $ 0.89 | [6] | $ 0.84 | [6] | $ 0.25 | [6] | $ 0.51 | [6] | $ 0.63 | [6] | $ 0.43 | [6] | $ 0.13 | [6] | $ 0.46 | [6] | $ 2.49 | [7],[8] | $ 1.63 | [7],[8] | $ 1.22 | [7],[8]
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed and allocated undistributed net earnings to common stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 483.0 |  | $ 333.2 |  | $ 256.5 |
Add: Allocated undistributed net earnings to unvested restricted stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.6 |  | 1.6 |  | 1.0 |
Less: Undistributed net earnings reallocated to non- vested restricted stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2.6) |  | (1.6) |  | (0.9) |
Net earnings available to common stockholders - diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 483.0 |  | $ 333.2 |  | $ 256.6 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding - basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 194.3 |  | 203.9 |  | 210.0 |
Effect of assumed issuance of Settlement agreement shares | [9] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.6 |
Effect of contingently issuable shares | [9] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.2 |  | 1.3 |  | 0.9 |
Effect of unvested restricted stock units | [9] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.7 |  | 0.7 |  | 0.8 |
Weighted average number of common shares outstanding - diluted under two-class |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 196.2 |  | 205.9 |  | 213.3 |
Effect of unvested restricted stock - participating security | [9] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.0 |  | 0.8 |  | 0.6 |
Weighted average number of common shares outstanding - diluted under treasury stock | [7] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 197.2 |  | 206.7 |  | 213.9 |
Diluted net earnings per common share |  | $ 0.87 | [6] | $ 0.83 | [6] | $ 0.25 | [6] | $ 0.51 | [6] | $ 0.62 | [6] | $ 0.42 | [6] | $ 0.13 | [6] | $ 0.46 | [6] | $ 2.46 | [7],[8] | $ 1.62 | [7],[8] | $ 1.20 | [7],[8]
[1] | The Company early adopted ASU 2016-09 on a prospective basis, related to the recognition of excess tax benefits to the income statement which were previously recorded in additional paid-in capital, effective January 1, 2016. This resulted in an additional diluted weighted average number of common shares outstanding of 404,347, 456,352, 377,130 and 536,975 and recognition of excess tax benefits in the income tax provision of $10.6 million, zero, $1.8 million and $5.7 million for the three months ended March 31, 2016, June 30, 2016, September 30, 2016 and December 31, 2016, respectively. As a result, net earnings per common share increased by $0.05 per share, zero, $0.01 per share and $0.04 per share for three months ended March 31, 2016, June 30, 2016, September 30, 2016 and December 31, 2016, respectively. Refer to Note 2, “Recently Issued Accounting Standards” of the Notes to Consolidated Financial Statements for further details.
[2] | During the fourth quarter of 2015, adjustments were made to prior year provisions which resulted in an increase in earnings per share. Refer to Note 16 “Income Taxes” of the Notes to Consolidated Financial Statements for further information.
[3] | Certain amounts related to external payment terms were misclassified in the Consolidated Balance Sheet as of December 31, 2015 and 2014. The revision of this item resulted in a decrease in accounts payable and an increase in short-term borrowings in each year. Additionally, due to changes in the accounting treatment of a factoring agreement the Company reclassified amounts from cash and cash equivalents to other receivables for the years ended December 31, 2015 and 2014. See Note 2 “Summary of Significant Accounting Policies and Recently Issued Accounting Standards” of the Notes to Consolidated Financial Statements under the heading “Reclassifications and Revisions” for further discussion of the revisions.
[4] | During the first quarter of 2015, the Company received the tax refund of $235.2 million related to the Settlement agreement payment. During the first quarter of 2014, we used $929.7 million of cash to fund the cash portion of the Settlement agreement and related accrued interest. We recorded an excess tax benefit of $46.2 million as an out-of-period adjustment in December 2015 and $37.7 million in December 2014 related to the 18 million shares of Common Stock issued in connection with the Settlement agreement. See Note 16 “Income Taxes” of the Notes to Consolidated Financial Statements for further discussion of the out-of-period adjustment.
[5] | Interest payments in 2014 include $416.6 million related to the Settlement agreement.
[6] | The sum of the quarterly per share amounts may not agree to the respective annual amounts due to rounding.
[7] | The Company early adopted ASU 2016-09 on a prospective basis as required, related to the recognition of excess tax benefits to the Consolidated Statement of Operations which were previously recorded in additional paid-in capital, effective January 1, 2016. This resulted in an additional 446,747 diluted weighted average number of common shares outstanding for the year ended December 31, 2016, and recognition of excess tax benefits of $18.1 million in the income tax provision for the year ended December 31, 2016. As a result, net earnings per common share increased by $0.10 per share for the year ended December 31, 2016. Refer to Note 2, “Summary of Significant Accounting Policies and Recently Issued Accounting Standards” of the Notes to the Consolidated Financial Statements for further details.
[8] | The Company early adopted ASU 2016-09 on a prospective basis, related to the recognition of excess tax benefits to the income statement which were previously recorded in additional paid-in capital, effective January 1, 2016. This resulted in an additional 446,747 diluted weighted average number of common shares outstanding for the year ended December 31, 2016 and recognition of excess taxbenefits of $18.1 million in income tax provision for the year ended December 31, 2016. As a result,net earnings per common share increased by $0.10 per share for the year ended December 31, 2016. Refer to Note 2, “Recently Issued Accounting Standards” of the Notes to Consolidated Financial Statements for further details.
[9] | Provides for the following items if their inclusion is dilutive: (i) the effect of the issuance of 18 million shares of common stock reserved for the Settlement agreement as defined and (ii) the effect of non-vested restricted stock, restricted stock units and contingently issuable shares using the treasury stock method.

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