Consolidated Statements of Equity - USD ($) $ in Millions | Total | Total SunCoke Energy, Inc. Equity | Common Stock | Treasury Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Loss | Retained (Deficit) Earnings | Non-controlling Interests |
Beginning balance (in shares) at Dec. 31, 2021 | | | 98,496,809 | | | | | |
Beginning balance at Dec. 31, 2021 | $ 535.4 | $ 498.1 | $ 1 | $ (184) | $ 721.2 | $ (16.7) | $ (23.4) | $ 37.3 |
Treasury stock, beginning balance (in shares) at Dec. 31, 2021 | | | | 15,404,482 | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income | 49.6 | 47.5 | | | | | 47.5 | 2.1 |
Reclassifications of prior service benefit and actuarial loss amortization to earnings, net of tax | 0.2 | 0.2 | | | | 0.2 | | |
Currency translation adjustment | 0.3 | 0.3 | | | | 0.3 | | |
Share-based compensation | 4.4 | 4.4 | | | 4.4 | | | |
Share issuances, net of shares withheld for taxes (in shares) | | | 299,016 | | | | | |
Share issuances, net of shares withheld for taxes | (1.2) | (1.2) | | | (1.2) | | | |
Dividends | (10.2) | (10.2) | | | | | (10.2) | |
Cash distribution to noncontrolling interests | (4.4) | | | | | | | (4.4) |
Ending balance (in shares) at Jun. 30, 2022 | | | 98,795,825 | | | | | |
Ending balance at Jun. 30, 2022 | 574.1 | 539.1 | $ 1 | $ (184) | 724.4 | (16.2) | 13.9 | 35 |
Treasury stock, ending balance (in shares) at Jun. 30, 2022 | | | | 15,404,482 | | | | |
Beginning balance (in shares) at Mar. 31, 2022 | | | 98,754,995 | | | | | |
Beginning balance at Mar. 31, 2022 | 561.9 | 525 | $ 1 | $ (184) | 722.3 | (15.3) | 1 | 36.9 |
Treasury stock, beginning balance (in shares) at Mar. 31, 2022 | | | | 15,404,482 | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income | 19 | 18 | | | | | 18 | 1 |
Reclassifications of prior service benefit and actuarial loss amortization to earnings, net of tax | 0.1 | 0.1 | | | | 0.1 | | |
Currency translation adjustment | (1) | (1) | | | | (1) | | |
Share-based compensation | 1.9 | 1.9 | | | 1.9 | | | |
Share issuances, net of shares withheld for taxes (in shares) | | | 40,830 | | | | | |
Share issuances, net of shares withheld for taxes | 0.2 | 0.2 | | | 0.2 | | | |
Dividends | (5.1) | (5.1) | | | | | (5.1) | |
Cash distribution to noncontrolling interests | (2.9) | | | | | | | (2.9) |
Ending balance (in shares) at Jun. 30, 2022 | | | 98,795,825 | | | | | |
Ending balance at Jun. 30, 2022 | 574.1 | 539.1 | $ 1 | $ (184) | 724.4 | (16.2) | 13.9 | 35 |
Treasury stock, ending balance (in shares) at Jun. 30, 2022 | | | | 15,404,482 | | | | |
Beginning balance (in shares) at Dec. 31, 2022 | | | 98,815,780 | | | | | |
Beginning balance at Dec. 31, 2022 | $ 622.7 | 585.6 | $ 1 | $ (184) | 728.1 | (13) | 53.5 | 37.1 |
Treasury stock, beginning balance (in shares) at Dec. 31, 2022 | 15,404,482 | | | 15,404,482 | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income | $ 39.7 | 36.7 | | | | | 36.7 | 3 |
Reclassifications of prior service benefit and actuarial loss amortization to earnings, net of tax | 0.1 | 0.1 | | | | 0.1 | | |
Currency translation adjustment | 0.5 | 0.5 | | | | 0.5 | | |
Share-based compensation | 3.2 | 3.2 | | | 3.2 | | | |
Share issuances, net of shares withheld for taxes (in shares) | | | 344,919 | | | | | |
Share issuances, net of shares withheld for taxes | (3.4) | (3.4) | | | (3.4) | | | |
Dividends | (13.7) | (13.7) | | | | | (13.7) | |
Cash distribution to noncontrolling interests | (6.7) | | | | | | | (6.7) |
Ending balance (in shares) at Jun. 30, 2023 | | | 99,160,699 | | | | | |
Ending balance at Jun. 30, 2023 | $ 642.4 | 609 | $ 1 | $ (184) | 727.9 | (12.4) | 76.5 | 33.4 |
Treasury stock, ending balance (in shares) at Jun. 30, 2023 | 15,404,482 | | | 15,404,482 | | | | |
Beginning balance (in shares) at Mar. 31, 2023 | | | 99,124,637 | | | | | |
Beginning balance at Mar. 31, 2023 | $ 628.3 | 593.5 | $ 1 | $ (184) | 726.3 | (12.8) | 63 | 34.8 |
Treasury stock, beginning balance (in shares) at Mar. 31, 2023 | | | | 15,404,482 | | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | |
Net income | 22 | 20.4 | | | | | 20.4 | 1.6 |
Currency translation adjustment | 0.4 | 0.4 | | | | 0.4 | | |
Share-based compensation | 1.6 | 1.6 | | | 1.6 | | | |
Share issuances, net of shares withheld for taxes (in shares) | | | 36,062 | | | | | |
Dividends | (6.9) | (6.9) | | | | | (6.9) | |
Cash distribution to noncontrolling interests | (3) | | | | | | | (3) |
Ending balance (in shares) at Jun. 30, 2023 | | | 99,160,699 | | | | | |
Ending balance at Jun. 30, 2023 | $ 642.4 | $ 609 | $ 1 | $ (184) | $ 727.9 | $ (12.4) | $ 76.5 | $ 33.4 |
Treasury stock, ending balance (in shares) at Jun. 30, 2023 | 15,404,482 | | | 15,404,482 | | | | |