Condensed Consolidated Statements of Stockholders' Deficit - USD ($) shares in Millions, $ in Millions | Total | Common stock | Paid-in capital | Retained earnings | Accumulated other comprehensive (loss) income |
Common stock outstanding, at beginning of period (shares) at Sep. 30, 2021 | | 180.3 | | | |
Balance at beginning of period at Sep. 30, 2021 | $ 134.5 | $ 1.8 | $ 35.2 | $ 90 | $ 7.5 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net income | 87 | | | 87 | |
Dividends paid | (22.5) | | 0.1 | (22.6) | |
Stock-based compensation, net of issuances (in shares) | | 0.2 | | | |
Stock-based compensation, net of issuances | (2.4) | | (2.4) | | |
Stock repurchased and retired during period, shares (in shares) | | 0.9 | | | |
Repurchases of common stock | (31.4) | | | (31.4) | |
Other comprehensive income, net of tax | 2.1 | | | | 2.1 |
Common stock outstanding, at end of period (shares) at Dec. 31, 2021 | | 179.6 | | | |
Balance at end of period at Dec. 31, 2021 | 167.3 | $ 1.8 | 32.9 | 123 | 9.6 |
Common stock outstanding, at beginning of period (shares) at Sep. 30, 2021 | | 180.3 | | | |
Balance at beginning of period at Sep. 30, 2021 | 134.5 | $ 1.8 | 35.2 | 90 | 7.5 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net income | 168.4 | | | | |
Other comprehensive income, net of tax | 7.3 | | | | |
Common stock outstanding, at end of period (shares) at Mar. 31, 2022 | | 178.6 | | | |
Balance at end of period at Mar. 31, 2022 | 200.3 | $ 1.8 | 36.8 | 146.9 | 14.8 |
Common stock outstanding, at beginning of period (shares) at Dec. 31, 2021 | | 179.6 | | | |
Balance at beginning of period at Dec. 31, 2021 | 167.3 | $ 1.8 | 32.9 | 123 | 9.6 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net income | 81.4 | | | 81.4 | |
Dividends paid | (22.5) | | (0.1) | (22.6) | |
Stock-based compensation, net of issuances | 3.8 | | 3.8 | | |
Stock repurchased and retired during period, shares (in shares) | | 1 | | | |
Repurchases of common stock | (34.9) | | | (34.9) | |
Other comprehensive income, net of tax | 5.2 | | | | 5.2 |
Common stock outstanding, at end of period (shares) at Mar. 31, 2022 | | 178.6 | | | |
Balance at end of period at Mar. 31, 2022 | $ 200.3 | $ 1.8 | 36.8 | 146.9 | 14.8 |
Common stock outstanding, at beginning of period (shares) at Sep. 30, 2022 | 176.1 | 176.1 | | | |
Balance at beginning of period at Sep. 30, 2022 | $ 306.6 | $ 1.8 | 44.1 | 282 | (21.3) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net income | 81.9 | | | 81.9 | |
Dividends paid | (21.8) | | (0.1) | (21.9) | |
Stock-based compensation, net of issuances (in shares) | | 0.3 | | | |
Stock-based compensation, net of issuances | (3.4) | | (3.4) | | |
Stock repurchased and retired during period, shares (in shares) | | 2.9 | | | |
Repurchases of common stock | (87.5) | $ (0.1) | | (87.4) | |
Other comprehensive income, net of tax | 13.5 | | | | 13.5 |
Common stock outstanding, at end of period (shares) at Dec. 31, 2022 | | 173.5 | | | |
Balance at end of period at Dec. 31, 2022 | $ 289.3 | $ 1.7 | 40.8 | 254.6 | (7.8) |
Common stock outstanding, at beginning of period (shares) at Sep. 30, 2022 | 176.1 | 176.1 | | | |
Balance at beginning of period at Sep. 30, 2022 | $ 306.6 | $ 1.8 | 44.1 | 282 | (21.3) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net income | 1,309.2 | | | | |
Other comprehensive income, net of tax | $ 39.2 | | | | |
Common stock outstanding, at end of period (shares) at Mar. 31, 2023 | 168.7 | 168.7 | | | |
Balance at end of period at Mar. 31, 2023 | $ 1,372.4 | $ 1.7 | 42.6 | 1,310.2 | 17.9 |
Common stock outstanding, at beginning of period (shares) at Dec. 31, 2022 | | 173.5 | | | |
Balance at beginning of period at Dec. 31, 2022 | 289.3 | $ 1.7 | 40.8 | 254.6 | (7.8) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net income | 1,227.3 | | | 1,227.3 | |
Stock-based compensation, net of issuances (in shares) | | 0.1 | | | |
Stock-based compensation, net of issuances | 1.8 | | 1.8 | | |
Stock repurchased and retired during period, shares (in shares) | | 4.9 | | | |
Repurchases of common stock | (171.7) | $ (170) | | (171.7) | |
Other comprehensive income, net of tax | $ 25.7 | | | | 25.7 |
Common stock outstanding, at end of period (shares) at Mar. 31, 2023 | 168.7 | 168.7 | | | |
Balance at end of period at Mar. 31, 2023 | $ 1,372.4 | $ 1.7 | $ 42.6 | $ 1,310.2 | $ 17.9 |