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Share-Based Compensation - Summary of Activity Under Share-Based Compensation Plans (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Outstanding and nonvested, Beginning Balance, Number of Shares | [1] |  |  | 3,400 |  |
Granted, Number of Shares | [2] |  |  | 2,069 |  |
Vested, Number of Shares |  |  |  | (792) |  |
Forfeited, Number of Shares | [3] |  |  | (260) |  |
Outstanding and nonvested, Ending Balance, Number of Shares | [1] | 4,417 |  | 4,417 |  | 3,400
Number of Shares, Expected to vest | [4] | 3,701 |  | 3,701 |  |
Outstanding and nonvested, Beginning Balance, Weighted Average Grant Date Fair Value Per Share | [1] |  |  | $ 45.26 |  |
Granted, Weighted Average Grant Date Fair Value Per Share | [2] |  |  | 36.08 |  |
Vested, Weighted Average Grant Date Fair Value Per Share |  |  |  | 48.75 |  |
Forfeited, Weighted Average Grant Date Fair Value Per Share | [3] |  |  | 43.28 |  |
Outstanding and nonvested, Ending Balance, Weighted Average Grant Date Fair Value Per Share | [1] | $ 40.46 |  | 40.46 |  | $ 45.26
Expected to vest, Ending Balance, Weighted Average Grant Date Fair Value Per Share | [4] | $ 40.22 |  | $ 40.22 |  |
SARs [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of Awards Outstanding, Beginning Balance | [5] |  |  | 2,622 |  |
Granted, Number of Awards |  | 0 | 0 | 0 | 0 |
Exercised, Number of Awards |  |  |  | (37) |  |
Forfeited, Number of Awards |  |  |  | (176) |  |
Number of Awards Outstanding, Ending Balance | [5] | 2,409 |  | 2,409 |  | 2,622
Number of Awards Exercisable, Ending Balance | [5] | 2,409 |  | 2,409 |  |
Number of Awards Vested and expected to vest, Ending Balance |  | 2,409 |  | 2,409 |  |
Weighted Average Exercise Price Per Award Outstanding, Beginning Balance | [5] |  |  | $ 27.10 |  |
Granted, Weighted Average Exercise Price Per Award |  |  |  | 0 |  |
Exercised, Weighted Average Exercise Price Per Award |  |  |  | 20.57 |  |
Forfeited, Weighted Average Exercise Price Per Award |  |  |  | 23.17 |  |
Weighted Average Exercise Price Per Award Outstanding, Ending Balance | [5] | $ 27.49 |  | 27.49 |  | $ 27.10
Exercisable, Weighted Average Exercise Price Per Award, Ending Balance | [5] | 27.49 |  | 27.49 |  |
Weighted Average Exercise Price Per Award, Vested and expected to vest, Ending Balance |  | $ 27.49 |  | $ 27.49 |  |
Weighted Average Remaining Contractual Term Outstanding | [5] |  |  | 3 years 6 months |  | 3 years 9 months 18 days
Exercisable Weighted Average Remaining Contractual Term | [5] |  |  | 3 years 6 months |  |
Weighted Average Remaining Contractual Term, Vested and expected to vest |  |  |  | 3 years 6 months |  |
Aggregate Intrinsic Value Outstanding | [5],[6] | $ 2.5 |  | $ 2.5 |  | $ 36.3
Exercisable, Aggregate Intrinsic Value | [5],[6] | 2.5 |  | 2.5 |  |
Aggregate Intrinsic Value, Vested and expected to vest | [6] | $ 2.5 |  | $ 2.5 |  |
[1] | Includes 1,378,708 and 913,388 performance-based restricted stock units as of June 30, 2022 and December 31, 2021, respectively, which represents the maximum amount that can vest.
[2] | Includes 559,430 performance-based restricted stock units.
[3] | Includes 94,110 performance-based restricted stock units
[4] | Includes 744,382 performance-based restricted stock units.
[5] | Includes 0.8 million performance condition SARs
[6] | The intrinsic value is the amount by which the current market value of the underlying stock exceeds the exercise price of the SARs.

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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