XML 59 R38.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Employee Stock and Incentive Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Share-Based Compensation Expense [Table Text Block] | The following share-based compensation expense amounts were recognized in our Consolidated Statement of Income for the periods presented.
Share-Based Compensation Expense
Year Ended December 31 | 2021 | 2020 | 2019
Millions |  |  |
Performance Shares | $2.0 |  | $2.2 |  | $2.3 |
Restricted Stock Units | 1.0 |  | 0.9 |  | 0.8 |
Total Share-Based Compensation Expense | $3.0 |  | $3.1 |  | $3.1 |
Income Tax Benefit | $0.9 |  | $0.9 |  | $0.9 |
Performance Shares [Table Text Block] | Performance Shares. The following table presents information regarding our non-vested performance shares.
| 2021 | 2020 | 2019
| Number of Shares | Weighted- Average Grant Date Fair Value | Number of Shares | Weighted- Average Grant Date Fair Value | Number of Shares | Weighted- Average Grant Date Fair Value
Non-vested as of January 1 | 85,284 |  | $80.73 |  | 99,585 |  | $72.78 |  | 129,693 |  | $66.12 |
Granted (a) | 33,304 |  | $73.25 |  | 25,763 |  | $83.17 |  | 60,747 |  | $63.89 |
Awarded | — |  | — |  | (25,304) |  | $62.03 |  | (75,943) |  | $53.44 |
Unearned Grant Award | (33,375) |  | $86.09 |  | (13,625) |  | $62.03 |  | — |  | — |
Forfeited | (4,552) |  | $74.05 |  | (1,135) |  | $79.81 |  | (14,912) |  | $77.14 |
Non-vested as of December 31 | 80,661 |  | $75.80 |  | 85,284 |  | $80.73 |  | 99,585 |  | $72.78 |
(a) Shares granted include accrued dividends.
Restricted Stock Units [Table Text Block] | Restricted Stock Units. The following table presents information regarding our available restricted stock units.
| 2021 | 2020 | 2019
| Number of Shares | Weighted- Average Grant Date Fair Value | Number of Shares | Weighted- Average Grant Date Fair Value | Number of Shares | Weighted- Average Grant Date Fair Value
Available as of January 1 | 37,482 |  | $77.64 |  | 39,943 |  | $69.30 |  | 49,771 |  | $60.74 |
Granted (a) | 16,251 |  | $64.97 |  | 15,169 |  | $83.48 |  | 13,927 |  | $74.93 |
Awarded | (23,631) |  | $74.53 |  | (17,193) |  | $63.41 |  | (21,110) |  | $52.44 |
Forfeited | (1,961) |  | $74.52 |  | (437) |  | $77.52 |  | (2,645) |  | $72.43 |
Available as of December 31 | 28,141 |  | $73.16 |  | 37,482 |  | $77.64 |  | 39,943 |  | $69.30 |
(a) Shares granted include accrued dividends.

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration