CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Millions, $ in Millions | Total | Cumulative Effect, Period Of Adoption, Adjustment | Common Stock | Treasury Stock | Additional Paid in Capital | Retained Earnings | Retained EarningsCumulative Effect, Period Of Adoption, Adjustment | Accumulated Other Comprehensive Loss | Non-controlling Interest |
Balance at beginning of period (in shares) at Dec. 31, 2018 | | | 99.2 | 44.7 | | | | | |
Balance at beginning of period at Dec. 31, 2018 | $ 217.5 | | $ 1 | $ (1,737) | $ 532.1 | $ 1,513.8 | | $ (95.3) | $ 2.9 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income | 143.3 | | | | | 143.3 | | | |
Net income attributable to non-controlling interests | 0 | | | | | | | | |
Repurchase of interest in subsidiary | (1.9) | | | | | | | | (1.9) |
Foreign currency adjustments, net of tax | 0.3 | | | | | | | 0.3 | |
Exercise of stock options (in shares) | | | | (0.3) | | | | | |
Exercise of stock options | 12.8 | | | $ 3.6 | 9.2 | | | | |
Issuances of PRSUs, RSUs, and DSUs (in shares) | | | | (0.2) | | | | | |
Issuances of PRSUs, RSUs, and DSUs | 0 | | | $ 3.6 | (3.6) | | | | |
Treasury stock repurchased (in shares) | | | | 0.7 | | | | | |
Treasury stock repurchased | (52.3) | | | $ (52.3) | | | | | |
Treasury stock repurchased - PRSU/RSU/DSU releases (in shares) | | | | 0.1 | | | | | |
Treasury stock repurchased - PRSU/RSU/DSU releases | (3.2) | | | $ (3.2) | | | | | |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 20 | | | | 20 | | | | |
Balance at ending of period (in shares) at Sep. 30, 2019 | | | 99.2 | 45 | | | | | |
Balance at end of period at Sep. 30, 2019 | 336.5 | | $ 1 | $ (1,785.3) | 557.7 | 1,657.1 | | (95) | 1 |
Balance at beginning of period (in shares) at Jun. 30, 2019 | | | 99.2 | 44.4 | | | | | |
Balance at beginning of period at Jun. 30, 2019 | 305.9 | | $ 1 | $ (1,737.3) | 545.6 | 1,583.8 | | (88.3) | 1.1 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income | 73.3 | | | | | 73.3 | | | |
Net income attributable to non-controlling interests | (0.1) | | | | | | | | (0.1) |
Foreign currency adjustments, net of tax | (6.7) | | | | | | | (6.7) | |
Exercise of stock options (in shares) | | | | (0.1) | | | | | |
Exercise of stock options | 7.3 | | | $ 1.9 | 5.4 | | | | |
Issuances of PRSUs, RSUs, and DSUs | 0 | | | $ 0.1 | (0.1) | | | | |
Treasury stock repurchased (in shares) | | | | 0.7 | | | | | |
Treasury stock repurchased | (50) | | | $ (50) | | | | | |
Treasury stock repurchased - PRSU/RSU/DSU releases | 0 | | | | | | | | |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 6.8 | | | | 6.8 | | | | |
Balance at ending of period (in shares) at Sep. 30, 2019 | | | 99.2 | 45 | | | | | |
Balance at end of period at Sep. 30, 2019 | 336.5 | | $ 1 | $ (1,785.3) | 557.7 | 1,657.1 | | (95) | 1 |
Balance at beginning of period (in shares) at Dec. 31, 2019 | | | 99.2 | 45.4 | | | | | |
Balance at beginning of period at Dec. 31, 2019 | 360.4 | $ (6.5) | $ 1 | $ (1,832.8) | 575.7 | 1,703.3 | $ (6.5) | (87.7) | 0.9 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income | 204.1 | | | | | 204.1 | | | |
Net income attributable to non-controlling interests | 0.1 | | | | | | | | 0.1 |
Dividend paid to non-controlling interest in subsidiary | 0 | | | | | | | | |
Acquisition of non-controlling interest in subsidiary | 0 | | | | | | | | |
Foreign currency adjustments, net of tax | (0.2) | | | | | | | (0.2) | |
Exercise of stock options | 2.4 | | | $ 0.5 | 1.9 | | | | |
Issuances of PRSUs, RSUs, and DSUs (in shares) | | | | (0.4) | | | | | |
Issuances of PRSUs, RSUs, and DSUs | 0 | | | $ 5.8 | (5.8) | | | | |
Treasury stock repurchased (in shares) | | | | 2.6 | | | | | |
Treasury stock repurchased | (187.5) | | | $ (187.5) | | | | | |
Treasury stock repurchased - PRSU/RSU/DSU releases (in shares) | | | | 0.1 | | | | | |
Treasury stock repurchased - PRSU/RSU/DSU releases | (12.1) | | | $ (12.1) | | | | | |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 86.6 | | | | 86.6 | | | | |
Balance at ending of period (in shares) at Sep. 30, 2020 | | | 99.2 | 47.7 | | | | | |
Balance at end of period at Sep. 30, 2020 | 447.3 | | $ 1 | $ (2,026.1) | 658.4 | 1,900.9 | | (87.9) | 1 |
Redeemable noncontrolling interest, beginning balance at Dec. 31, 2019 | 0 | | | | | | | | |
Increase (Decrease) in Temporary Equity [Roll Forward] | | | | | | | | | |
Net income attributable to non-controlling interests | 0.6 | | | | | | | | |
Acquisition of non-controlling interest in subsidiary | 8.4 | | | | | | | | |
Dividend paid to non-controlling interest in subsidiary | (0.1) | | | | | | | | |
Redeemable noncontrolling interest, ending balance at Sep. 30, 2020 | 8.9 | | | | | | | | |
Balance at beginning of period (in shares) at Jun. 30, 2020 | | | 99.2 | 47.7 | | | | | |
Balance at beginning of period at Jun. 30, 2020 | 241 | | $ 1 | $ (2,026.3) | 586 | 1,779.5 | | (100) | 0.8 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net income | 121.4 | | | | | 121.4 | | | |
Net income attributable to non-controlling interests | 0.2 | | | | | | | | 0.2 |
Foreign currency adjustments, net of tax | 12.1 | | | | | | | 12.1 | |
Exercise of stock options | 0.9 | | | 0.2 | 0.7 | | | | |
Issuances of PRSUs, RSUs, and DSUs | 0 | | | 0.1 | (0.1) | | | | |
Treasury stock repurchased - PRSU/RSU/DSU releases | (0.1) | | | $ (0.1) | | | | | |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 71.8 | | | | 71.8 | | | | |
Balance at ending of period (in shares) at Sep. 30, 2020 | | | 99.2 | 47.7 | | | | | |
Balance at end of period at Sep. 30, 2020 | 447.3 | | $ 1 | $ (2,026.1) | $ 658.4 | $ 1,900.9 | | $ (87.9) | $ 1 |
Redeemable noncontrolling interest, beginning balance at Jun. 30, 2020 | 8.7 | | | | | | | | |
Increase (Decrease) in Temporary Equity [Roll Forward] | | | | | | | | | |
Net income attributable to non-controlling interests | 0.2 | | | | | | | | |
Redeemable noncontrolling interest, ending balance at Sep. 30, 2020 | $ 8.9 | | | | | | | | |