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Stock-Based Compensation (Summary Of Nonvested Shares) (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Performance Share Units | Market Condition PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares issued per share unit, minimum | 0.00% |  |
Percentage of shares issued per share unit, maximum | 200.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |
Outstanding at January 1, 2022(c) | 828,551 |  |
Granted | 245,475 |  |
Forfeitures | (49,629) |  |
Dividend equivalent(d) | 19,314 |  |
Vested and distributed | (299,438) |  |
Outstanding at December 31, 2022(c) | 744,273 | 828,551 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Weighted-average Fair Value per Unit, Nonvested at beginning of year (in dollars per share) | $ 78.53 |  |
Fair value of share units awarded | 92.75 | $ 87.11 | $ 82.49
Weighted-average Fair Value per Unit, Unearned or forfeited (in dollars per share) | 88.51 |  |
Weighted-average Fair Value per Unit, Dividend Equivalent (in dollars per share) | 87.19 |  |
Weighted-average Fair Value per Unit, Vested and distributed (in dollars per share) | 67.47 |  |
Weighted-average Fair Value per Unit, Nonvested at end of year (in dollars per share) | $ 87.23 | $ 78.53 |
Performance Share Units | Performance Condition PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of shares issued per share unit, minimum | 0.00% |  |
Percentage of shares issued per share unit, maximum | 200.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |
Outstanding at January 1, 2022(c) | 85,096 |  |
Granted | 39,771 |  |
Forfeitures | (8,134) |  |
Dividend equivalent(d) | 3,131 |  |
Vested and distributed | (127) |  |
Outstanding at December 31, 2022(c) | 119,737 | 85,096 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Weighted-average Fair Value per Unit, Nonvested at beginning of year (in dollars per share) | $ 77.39 |  |
Fair value of share units awarded | 87.83 |  |
Weighted-average Fair Value per Unit, Unearned or forfeited (in dollars per share) | 81.78 |  |
Weighted-average Fair Value per Unit, Dividend Equivalent (in dollars per share) | 81.00 |  |
Weighted-average Fair Value per Unit, Vested and distributed (in dollars per share) | 78.67 |  |
Weighted-average Fair Value per Unit, Nonvested at end of year (in dollars per share) | $ 80.65 | $ 77.39 |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |
Outstanding at January 1, 2022(c) | 433,249 |  |
Granted | 146,955 |  |
Forfeitures | (24,386) |  |
Dividend equivalent(d) | 11,126 |  |
Vested and distributed | (130,132) |  |
Outstanding at December 31, 2022(c) | 436,812 | 433,249 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Weighted-average Fair Value per Unit, Nonvested at beginning of year (in dollars per share) | $ 73.98 |  |
Fair value of share units awarded | 88.27 |  |
Weighted-average Fair Value per Unit, Unearned or forfeited (in dollars per share) | 81.78 |  |
Weighted-average Fair Value per Unit, Dividend Equivalent (in dollars per share) | 80.84 |  |
Weighted-average Fair Value per Unit, Vested and distributed (in dollars per share) | 65.87 |  |
Weighted-average Fair Value per Unit, Nonvested at end of year (in dollars per share) | $ 80.94 | $ 73.98 |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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