Guarantor Subsidiaries - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 |
Operating activities | | | | |
Cash provided by operating activities | | | $ 145 | $ 171.5 |
Investing activities | | | | |
Expenditures for property, plant and equipment | $ (4.8) | $ (8.5) | (14) | (24.4) |
Acquisitions, net of cash acquired | | | (3.4) | (59.4) |
Proceeds from dispositions of long-lived assets | | | 13 | 2.1 |
Cash used for investing activities | | | (4.4) | (81.7) |
Financing activities | | | | |
Proceeds from borrowings of debt | | | 0 | 325 |
Repayments of debt | | | (1.1) | (250.6) |
Repurchase of common stock | | | (0.9) | (80.7) |
Payment of common stock dividends | | | (21.6) | (19.4) |
Proceeds from exercise of stock options | | | 19.4 | 25.5 |
Taxes withheld and paid on employees' share-based payment awards | | | (1.4) | (9.4) |
Cash used for financing activities | | | (5.6) | (9.6) |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | 0.1 | (3.8) |
(Decrease) increase in cash, cash equivalents and restricted cash | | | 135.1 | 76.4 |
Cash, cash equivalents and restricted cash at beginning of period | | | 255.6 | 277 |
Cash, cash equivalents and restricted cash at end of period | 390.7 | 353.4 | 390.7 | 353.4 |
Eliminations | | | | |
Operating activities | | | | |
Cash provided by operating activities | | | 0 | 0 |
Investing activities | | | | |
Expenditures for property, plant and equipment | | | 0 | 0 |
Acquisitions, net of cash acquired | | | 0 | 0 |
Proceeds from dispositions of long-lived assets | | | 0 | 0 |
Cash used for investing activities | | | 0 | 0 |
Financing activities | | | | |
Proceeds from borrowings of debt | | | | 0 |
Repayments of debt | | | 0 | 0 |
Repurchase of common stock | | | 0 | 0 |
Payment of common stock dividends | | | 0 | 0 |
Proceeds from exercise of stock options | | | 0 | 0 |
Taxes withheld and paid on employees' share-based payment awards | | | 0 | 0 |
Cash used for financing activities | | | 0 | 0 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | 0 | 0 |
(Decrease) increase in cash, cash equivalents and restricted cash | | | 0 | 0 |
Cash, cash equivalents and restricted cash at beginning of period | | | 0 | 0 |
Cash, cash equivalents and restricted cash at end of period | 0 | 0 | 0 | 0 |
Parent | Reportable Legal Entities | | | | |
Operating activities | | | | |
Cash provided by operating activities | | | 4 | 84 |
Investing activities | | | | |
Expenditures for property, plant and equipment | | | 0 | 0 |
Acquisitions, net of cash acquired | | | 0 | 0 |
Proceeds from dispositions of long-lived assets | | | 0 | 0 |
Cash used for investing activities | | | 0 | 0 |
Financing activities | | | | |
Proceeds from borrowings of debt | | | | 0 |
Repayments of debt | | | 0 | 0 |
Repurchase of common stock | | | (0.9) | (80.7) |
Payment of common stock dividends | | | (21.6) | (19.4) |
Proceeds from exercise of stock options | | | 19.4 | 25.5 |
Taxes withheld and paid on employees' share-based payment awards | | | (1.4) | (9.4) |
Cash used for financing activities | | | (4.5) | (84) |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | 0 | 0 |
(Decrease) increase in cash, cash equivalents and restricted cash | | | (0.5) | 0 |
Cash, cash equivalents and restricted cash at beginning of period | | | 0.5 | 0 |
Cash, cash equivalents and restricted cash at end of period | 0 | 0 | 0 | 0 |
Issuer | Reportable Legal Entities | | | | |
Operating activities | | | | |
Cash provided by operating activities | | | 0 | 0.3 |
Investing activities | | | | |
Expenditures for property, plant and equipment | | | 0 | 0 |
Acquisitions, net of cash acquired | | | 0 | 0 |
Proceeds from dispositions of long-lived assets | | | 0 | 0 |
Cash used for investing activities | | | 0 | 0 |
Financing activities | | | | |
Proceeds from borrowings of debt | | | | 250 |
Repayments of debt | | | 0 | (250) |
Repurchase of common stock | | | 0 | 0 |
Payment of common stock dividends | | | 0 | 0 |
Proceeds from exercise of stock options | | | 0 | 0 |
Taxes withheld and paid on employees' share-based payment awards | | | 0 | 0 |
Cash used for financing activities | | | 0 | 0 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | 0 | 0 |
(Decrease) increase in cash, cash equivalents and restricted cash | | | 0 | 0.3 |
Cash, cash equivalents and restricted cash at beginning of period | | | 0.2 | 0 |
Cash, cash equivalents and restricted cash at end of period | 0.2 | 0.3 | 0.2 | 0.3 |
Guarantor Subsidiaries | Reportable Legal Entities | | | | |
Operating activities | | | | |
Cash provided by operating activities | | | 113.2 | 44.3 |
Investing activities | | | | |
Expenditures for property, plant and equipment | | | (7.2) | (17.9) |
Acquisitions, net of cash acquired | | | (3.4) | (59.4) |
Proceeds from dispositions of long-lived assets | | | 6 | 1.2 |
Cash used for investing activities | | | (4.6) | (76.1) |
Financing activities | | | | |
Proceeds from borrowings of debt | | | | 75 |
Repayments of debt | | | (1.1) | (0.2) |
Repurchase of common stock | | | 0 | 0 |
Payment of common stock dividends | | | 0 | 0 |
Proceeds from exercise of stock options | | | 0 | 0 |
Taxes withheld and paid on employees' share-based payment awards | | | 0 | 0 |
Cash used for financing activities | | | (1.1) | 74.8 |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | 0 | 0 |
(Decrease) increase in cash, cash equivalents and restricted cash | | | 107.5 | 43 |
Cash, cash equivalents and restricted cash at beginning of period | | | 46.7 | 117.4 |
Cash, cash equivalents and restricted cash at end of period | 154.2 | 160.4 | 154.2 | 160.4 |
Non-Guarantor Subsidiaries | Reportable Legal Entities | | | | |
Operating activities | | | | |
Cash provided by operating activities | | | 27.8 | 42.9 |
Investing activities | | | | |
Expenditures for property, plant and equipment | | | (6.8) | (6.5) |
Acquisitions, net of cash acquired | | | 0 | 0 |
Proceeds from dispositions of long-lived assets | | | 7 | 0.9 |
Cash used for investing activities | | | 0.2 | (5.6) |
Financing activities | | | | |
Proceeds from borrowings of debt | | | | 0 |
Repayments of debt | | | 0 | (0.4) |
Repurchase of common stock | | | 0 | 0 |
Payment of common stock dividends | | | 0 | 0 |
Proceeds from exercise of stock options | | | 0 | 0 |
Taxes withheld and paid on employees' share-based payment awards | | | 0 | 0 |
Cash used for financing activities | | | 0 | (0.4) |
Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | 0.1 | (3.8) |
(Decrease) increase in cash, cash equivalents and restricted cash | | | 28.1 | 33.1 |
Cash, cash equivalents and restricted cash at beginning of period | | | 208.2 | 159.6 |
Cash, cash equivalents and restricted cash at end of period | $ 236.3 | $ 192.7 | $ 236.3 | $ 192.7 |