CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($)
$ in Millions |
Total |
Total Share- holders’ Equity |
Common Shares Issued at Par Value |
Capital Surplus |
Retained Earnings |
Accumulated Other Comprehensive Loss |
Non-controlling Interest |
| Balance, beginning of period at Dec. 31, 2023 |
$ 1,360.3
|
$ 1,357.8
|
$ 56.9
|
$ 398.2
|
$ 960.7
|
$ (58.0)
|
$ 2.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Net income |
64.8
|
64.8
|
|
|
64.8
|
|
|
| Cash dividends |
(11.7)
|
(11.7)
|
|
|
(11.7)
|
|
|
| Exercise of stock options, net of shares reacquired |
2.5
|
2.5
|
0.1
|
2.4
|
|
|
|
| Impact from settlement of share-based awards, net of shares acquired |
(11.0)
|
(11.0)
|
0.1
|
(11.1)
|
|
|
|
| Impact from settlement of liability PRSUs (Note 1) |
6.1
|
6.1
|
|
6.1
|
|
|
|
| Stock-based compensation expense |
5.4
|
5.4
|
|
5.4
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
3.0
|
3.0
|
|
|
|
3.0
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
(12.4)
|
(12.3)
|
|
|
|
(12.3)
|
(0.1)
|
| Balance, end of period at Mar. 31, 2024 |
$ 1,407.0
|
1,404.6
|
57.1
|
401.0
|
1,013.8
|
(67.3)
|
2.4
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.205
|
|
|
|
|
|
|
| Balance, beginning of period at Dec. 31, 2023 |
$ 1,360.3
|
1,357.8
|
56.9
|
398.2
|
960.7
|
(58.0)
|
2.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
9.0
|
|
|
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
9.6
|
|
|
|
|
|
|
| Balance, end of period at Sep. 30, 2024 |
$ 1,576.9
|
1,574.4
|
57.2
|
417.3
|
1,139.3
|
(39.4)
|
2.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.615
|
|
|
|
|
|
|
| Balance, beginning of period at Mar. 31, 2024 |
$ 1,407.0
|
1,404.6
|
57.1
|
401.0
|
1,013.8
|
(67.3)
|
2.4
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Net income |
71.6
|
71.6
|
|
|
71.6
|
|
|
| Cash dividends |
(11.7)
|
(11.7)
|
|
|
(11.7)
|
|
|
| Exercise of stock options, net of shares reacquired |
3.6
|
3.6
|
0.1
|
3.5
|
|
|
|
| Impact from settlement of share-based awards, net of shares acquired |
(0.2)
|
(0.2)
|
|
(0.2)
|
|
|
|
| Stock-based compensation expense |
5.7
|
5.7
|
|
5.7
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
3.0
|
3.0
|
|
|
|
3.0
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
(3.3)
|
(3.3)
|
|
|
|
(3.3)
|
|
| Balance, end of period at Jun. 30, 2024 |
$ 1,475.7
|
1,473.3
|
57.2
|
410.0
|
1,073.7
|
(67.6)
|
2.4
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.205
|
|
|
|
|
|
|
| Net income |
$ 77.3
|
77.3
|
|
|
77.3
|
|
|
| Cash dividends |
(11.7)
|
(11.7)
|
|
|
(11.7)
|
|
|
| Exercise of stock options, net of shares reacquired |
1.8
|
1.8
|
|
1.8
|
|
|
|
| Impact from settlement of share-based awards, net of shares acquired |
(0.2)
|
(0.2)
|
|
(0.2)
|
|
|
|
| Stock-based compensation expense |
5.7
|
5.7
|
|
5.7
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
3.0
|
3.0
|
|
|
|
3.0
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
25.3
|
25.2
|
|
|
|
25.2
|
0.1
|
| Balance, end of period at Sep. 30, 2024 |
$ 1,576.9
|
1,574.4
|
57.2
|
417.3
|
1,139.3
|
(39.4)
|
2.5
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.205
|
|
|
|
|
|
|
| Balance, beginning of period at Dec. 31, 2024 |
$ 1,641.0
|
1,638.7
|
57.3
|
425.5
|
1,217.8
|
(61.9)
|
2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Net income |
107.1
|
107.1
|
|
|
107.1
|
|
|
| Cash dividends |
(13.2)
|
(13.2)
|
|
|
(13.2)
|
|
|
| Exercise of stock options, net of shares reacquired |
4.1
|
4.1
|
0.1
|
4.0
|
|
|
|
| Impact from settlement of share-based awards, net of shares acquired |
(14.5)
|
(14.5)
|
0.1
|
(14.6)
|
|
|
|
| Impact from settlement of liability PRSUs (Note 1) |
5.7
|
5.7
|
|
5.7
|
|
|
|
| Stock-based compensation expense |
8.0
|
8.0
|
|
8.0
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
2.7
|
2.7
|
|
|
|
2.7
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
18.3
|
18.3
|
|
|
|
18.3
|
|
| Balance, end of period at Mar. 31, 2025 |
$ 1,759.2
|
1,756.9
|
57.5
|
428.6
|
1,311.7
|
(40.9)
|
2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.23
|
|
|
|
|
|
|
| Balance, beginning of period at Dec. 31, 2024 |
$ 1,641.0
|
1,638.7
|
57.3
|
425.5
|
1,217.8
|
(61.9)
|
2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
8.1
|
|
|
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
51.8
|
|
|
|
|
|
|
| Balance, end of period at Sep. 30, 2025 |
$ 1,968.5
|
1,966.2
|
57.6
|
447.6
|
1,463.0
|
(2.0)
|
2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.69
|
|
|
|
|
|
|
| Balance, beginning of period at Mar. 31, 2025 |
$ 1,759.2
|
1,756.9
|
57.5
|
428.6
|
1,311.7
|
(40.9)
|
2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Net income |
86.4
|
86.4
|
|
|
86.4
|
|
|
| Cash dividends |
(13.2)
|
(13.2)
|
|
|
(13.2)
|
|
|
| Exercise of stock options, net of shares reacquired |
1.7
|
1.7
|
0.0
|
1.7
|
|
|
|
| Impact from settlement of share-based awards, net of shares acquired |
(0.2)
|
(0.2)
|
|
(0.2)
|
|
|
|
| Stock-based compensation expense |
10.3
|
10.3
|
|
10.3
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
2.7
|
2.7
|
|
|
|
2.7
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
41.7
|
41.7
|
|
|
|
41.7
|
0.0
|
| Balance, end of period at Jun. 30, 2025 |
$ 1,888.6
|
1,886.3
|
57.5
|
440.4
|
1,384.9
|
3.5
|
2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.23
|
|
|
|
|
|
|
| Net income |
$ 91.4
|
91.4
|
|
|
91.4
|
|
|
| Cash dividends |
(13.3)
|
(13.3)
|
|
|
(13.3)
|
|
|
| Exercise of stock options, net of shares reacquired |
3.0
|
3.0
|
0.1
|
2.9
|
|
|
|
| Stock-based compensation expense |
4.3
|
4.3
|
|
4.3
|
|
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
2.7
|
2.7
|
|
|
|
2.7
|
|
| Changes in pension and postretirement plan assets and benefit obligation, net of tax |
(8.2)
|
(8.2)
|
|
|
|
(8.2)
|
0.0
|
| Balance, end of period at Sep. 30, 2025 |
$ 1,968.5
|
$ 1,966.2
|
$ 57.6
|
$ 447.6
|
$ 1,463.0
|
$ (2.0)
|
$ 2.3
|
| Increase (Decrease) in Stockholders' Equity [Roll Forward] |
|
|
|
|
|
|
|
| Dividends per share (in dollars per share) |
$ 0.23
|
|
|
|
|
|
|