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Stock-Based Compensation (Tables) | 12 Months Ended
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Mar. 31, 2022
Share-based Payment Arrangement [Abstract] |
Schedule of Stock-Based Compensation Expense | Total stock-based compensation expense consists of the following:
| Years Ended 31 March
(Millions of US dollars) | 2022 |  | 2021 |  | 2020
Liability Awards | $ | 3.2 |  |  | $ | 21.7 |  |  | $ | 2.8 |
Equity Awards | 9.0 |  |  | 18.0 |  |  | 10.3 |
Total stock-based compensation expense | $ | 12.2 |  |  | $ | 39.7 |  |  | $ | 13.1 |
Summary of Stock Options Available for Grant | The following table summarizes the Company’s shares available for grant as options, RSUs or other equity instruments under the LTIP and 2001 Plan:
| Shares Available for Grant
Balance at 31 March 2020 | 22,944,379 |
Granted | (856,756) |
Balance at 31 March 2021 | 22,087,623 |
Granted | (597,927) |
Balance at 31 March 2022 | 21,489,696 |
Restricted Stock Unit Activity | The following table summarizes the Company’s RSU activity:
(Units) | Service Vesting (2001 Plan) |  | Performance Vesting (LTIP) |  | Market Conditions (LTIP) |  | Total |  | Weighted Average Fair Value at Grant Date (A$)
Outstanding at 31 March 2020 | 520,632 |  |  | 864,165 |  |  | 1,777,640 |  |  | 3,162,437 |  |  | 14.64 |
Granted | 371,806 |  |  | 190,376 |  |  | 294,574 |  |  | 856,756 |  |  | 26.56 |
Vested | (245,385) |  |  | (174,356) |  |  | (722,156) |  |  | (1,141,897) |  |  | 13.03 |
Forfeited | (53,567) |  |  | (153,897) |  |  | (63,136) |  |  | (270,600) |  |  | 17.05 |
Outstanding at 31 March 2021 | 593,486 |  |  | 726,288 |  |  | 1,286,922 |  |  | 2,606,696 |  |  | 19.01 |
Granted | 233,443 |  |  | 141,015 |  |  | 223,469 |  |  | 597,927 |  |  | 41.73 |
Vested | (313,641) |  |  | (248,202) |  |  | (565,878) |  |  | (1,127,721) |  |  | 14.96 |
Forfeited | (98,613) |  |  | (327,397) |  |  | (450,480) |  |  | (876,490) |  |  | 27.73 |
Outstanding at 31 March 2022 | 414,675 |  |  | 291,704 |  |  | 494,033 |  |  | 1,200,412 |  |  | 27.83 |
Assumptions Used for Restricted Stock Grants | The following table includes the assumptions used for RSU grants (market condition) valued:
Vesting Condition: | Market |  | Market |  | Market |  | Market
| FY22 |  | FY22 |  | FY21 |  | FY21
Date of grant | 27 Aug 2021 |  | 9 Sep 2021 |  | 15 Sep 2020 |  | 5 Nov 2020
Dividend yield (per annum) | 2.0 | % |  | 2.0 | % |  | — | % |  | 1.3 | %
Expected volatility | 40.0 | % |  | 40.2 | % |  | 39.2 | % |  | 40.1 | %
Risk free interest rate | 0.4 | % |  | 0.4 | % |  | 0.2 | % |  | 0.2 | %
Expected life in years | 3.0 |  | 2.9 |  | 2.9 |  | 2.8
JHX stock price at grant date (A$) | 52.66 |  | 52.12 |  | 30.33 |  | 37.24
Number of restricted stock units | 130,513 |  | 92,956 |  | 167,491 |  | 127,083
Cash Settled Units Activity | The following represents the activity related to the CSUs:
|  | FY22 |  | FY21
Granted |  | 423,051 |  |  | 571,132 |
Vested |  | 433,872 |  |  | 377,506 |
Cancelled |  | 1,292,934 |  |  | 607,253 |

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- Definition Tabular disclosure of the assumptions used to determine the fair value of restricted stock grants, including but not limited to expected volatility, dividend yield, risk free interest rate and the expected life. + References No definition available. + Details
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- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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