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Description of Business, Basis of Presentation and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Description of Business, Basis of Presentation and Significant Accounting Policies [Abstract] |
Schedule of Depreciation Expense | Total depreciation expense on the Company’s property and equipment for December 31 was as follows:
In millions | 2022 |  | 2021 |  | 2020
Depreciation expense | $ | 127 |  |  | $ | 139 |  |  | $ | 138 |
Schedule of Activities Relating to Capitalized Software | The following table identifies the activity relating to capitalized software for the following periods:
| Internal-use Software |  | External-use Software
In millions | 2022 |  | 2021 |  | 2020 |  | 2022 |  | 2021 |  | 2020
Beginning balance at January 1 | $ | 10 |  |  | $ | 13 |  |  | $ | 13 |  |  | $ | — |  |  | $ | — |  |  | $ | 23 |
Capitalized | 3 |  |  | 3 |  |  | 7 |  |  | — |  |  | — |  |  | — |
Amortization | (5) |  |  | (6) |  |  | (7) |  |  | — |  |  | — |  |  | (23) |
Ending balance at December 31 | $ | 8 |  |  | $ | 10 |  |  | $ | 13 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Aggregate Amortization Expense for Internal and External-Use Software | The aggregate amortization expense (actual and estimated) for internal-use software for the following periods is:
| Actual |  | For the years ended (estimated)
In millions | 2022 |  | 2023 |  | 2024 |  | 2025 |  | 2026 |  | 2027
Internal-use software amortization expense | $ | 5 |  |  | $ | 5 |  |  | $ | 4 |  |  | $ | 3 |  |  | $ | 3 |  |  | $ | 3 |
Schedule of Basic and Diluted Earnings Per Share | The components of basic and diluted earnings per share for the years ended December 31 are as follows:
In millions, except earnings per share | 2022 |  | 2021 |  | 2020
Net income attributable to common stockholders | $ | 33 |  |  | $ | 147 |  |  | $ | 129 |
Weighted average outstanding shares of common stock | 103.2 |  |  | 108.6 |  |  | 109.3 |
Dilutive effect of employee stock options, restricted shares and other stock awards | 2.6 |  |  | 4.3 |  |  | 2.3 |
Common stock and common stock equivalents | 105.8 |  |  | 112.9 |  |  | 111.6 |
Earnings per share: |  |  |  |  |
Basic | $ | 0.32 |  |  | $ | 1.35 |  |  | $ | 1.18 |
Diluted | $ | 0.31 |  |  | $ | 1.30 |  |  | $ | 1.16 |

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