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Shareholders' Equity - Additional Information (Detail) |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |
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Jun. 17, 2020 $ / shares | May 31, 2019 $ / shares | Mar. 27, 2019 $ / shares | Nov. 05, 2018 USD ($) | May 31, 2018 $ / shares | Mar. 27, 2018 $ / shares | Jun. 20, 2017 $ / shares | Jan. 22, 2007 | Oct. 31, 2016 | Mar. 31, 2021 $ / shares | Dec. 31, 2020 USD ($) $ / shares shares | Sep. 30, 2020 $ / shares | Jun. 30, 2020 $ / shares | Mar. 31, 2020 $ / shares | Dec. 31, 2019 USD ($) $ / shares shares | Sep. 30, 2019 $ / shares | Jun. 30, 2019 $ / shares | Mar. 31, 2019 $ / shares | Dec. 31, 2018 USD ($) $ / shares | Sep. 30, 2018 $ / shares | Jun. 30, 2018 $ / shares | Mar. 31, 2018 $ / shares | Dec. 31, 2017 $ / shares | Sep. 30, 2017 $ / shares | Jun. 30, 2017 $ / shares | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2007 | Dec. 31, 2020 EUR (€) € / shares shares | Dec. 31, 2019 € / shares | May 20, 2012 | May 20, 2011 | May 20, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Authorized share capital | € |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1,810,000,000 |  |  |  |
Common stock, shares authorized |  |  |  |  |  |  |  |  |  |  | 1,200,000,000 |  |  |  | 1,200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,200,000,000 | 1,200,000,000 |  |  |  | 1,200,000,000 |  |  |  |
Preference stock, shares authorized |  |  |  |  |  |  |  |  |  |  | 540,000,000 |  |  |  | 540,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 540,000,000 | 540,000,000 |  |  |  | 540,000,000 |  |  |  |
Common stock, nominal value | € / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1.04 | € 1.04 |  |  |
Common stock, shares issued |  |  |  |  |  |  |  |  |  |  | 911,239,420 |  |  |  | 911,186,920 |  |  |  |  |  |  |  |  |  |  |  |  |  | 911,239,420 | 911,186,920 |  |  |  | 911,239,420 |  |  |  |
Common stock, shares outstanding |  |  |  |  |  |  |  |  |  |  | 905,415,002 |  |  |  | 891,434,489 |  |  |  |  |  |  |  |  |  |  |  |  |  | 905,415,002 | 891,434,489 |  |  |  | 905,415,002 |  |  |  |
Shares issued as a percentage of par value of the preference shares to be issued |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preference shares outstanding maximum period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |
Expiration period of options after date of grant, in years |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration extended period of options after date of grant,in years |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preference share issued |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  | 0 |  |  |  |
Company owned treasury stock |  |  |  |  |  |  |  |  |  |  | 5,824,418 |  |  |  | 19,752,431 |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,824,418 | 19,752,431 |  |  |  | 5,824,418 |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration programs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60,484,598 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60,484,598 |  |  |  |  |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration during the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,260,486 |  |  |  |  |  |  |  |
Period of buy-back program |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ |  |  |  | $ 750,000,000 |  |  |  |  |  |  | $ 125,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 125,000,000 |  |  |  |  |  |  |  |  |
Number of common shares authorized to repurchase |  |  |  |  |  |  |  |  |  |  | 4,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,800,000 |  |  |  |  | 4,800,000 |  |  |  |
Total intrinsic value of options exercised | $ |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  | $ 1,000,000 |  |  |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  | $ 2,000,000 | $ 1,000,000 | $ 1,000,000 |  |  |  |  |  |  |
Total intrinsic value of options outstanding | $ |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 | 3,000,000 |  |  |  |  |  |  |  |
Fair value of shares vested | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 141,000,000 | 114,000,000 | 68,000,000 |  |  |  |  |  |  |
Compensation cost, excluding payroll tax and social contribution, capitalized as part of inventory | $ |  |  |  |  |  |  |  |  |  |  | 6,000,000 |  |  |  | $ 6,000,000 |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  | 6,000,000 | 6,000,000 | 6,000,000 |  |  |  |  |  |  |
Total unrecognized compensation cost related to the grant of unvested shares | $ |  |  |  |  |  |  |  |  |  |  | $ 182,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 182,000,000 |  |  |  |  |  |  |  |  |
Employee service share-based compensation, unvested awards, total compensation cost not yet recognized, period for recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 months |  |  |  |  |  |  |  |  |
Deferred income tax benefit relating to unvested share based compensation expense | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 | 9,000,000 | 7,000,000 |  |  |  |  |  |  |
Dividends, per share | $ / shares | $ 0.168 | $ 0.24 |  |  | $ 0.24 |  | $ 0.24 |  |  |  | $ 0.042 | $ 0.042 | $ 0.042 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable to stockholders | $ |  |  |  |  |  |  |  |  |  |  | $ 42,000,000 |  |  |  | $ 58,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,000,000 | 58,000,000 |  |  |  |  |  |  |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.042 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend Distribution First Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 37,000,000 | 53,000,000 | 54,000,000 | $ 53,000,000 |  |  |  |  |  |
Dividend Distribution Second Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,000,000 | 53,000,000 | 54,000,000 | 53,000,000 |  |  |  |  |  |
Dividend Distribution Third Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 34,000,000 | $ 48,000,000 | $ 48,000,000 | $ 47,000,000 |  |  |  |  |  |
Dividend Distribution Remaining Portion of Third Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000,000 | $ 6,000,000 | $ 7,000,000 |  |  |  |  |  |  |  |  |  |
Dividends payable to stockholders | $ |  |  |  |  |  |  |  |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |
Dividend Distribution of Last Installment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend paid | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 53,000,000 | $ 54,000,000 | $ 53,000,000 |  |  |  |  |  |  |  |  |  |
Dividends payable to stockholders | $ |  |  |  |  |  |  |  |  |  |  | $ 38,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 38,000,000 |  |  |  |  |  |  |  |  |
Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration during the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,260,486 |  |  |  |  |  |  |  |  |
Vesting period of awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |
Vesting schedule for Supervisory Board |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | one third of the total number of awards granted |  |  |  |  |  |  |  |  |
Weighted average grant-date fair value of nonvested shares granted to employees under Employee Plan | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14.97 |  |  |  |  |  |  |  |
Supervisory Board 2012 Plan [Member] | Supervisory Board [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Awards are granted at the nominal value of the share | € / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1.04 |  |  |  |
Vesting period of awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |
Vesting schedule for Supervisory Board |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | one third every year |  |  |  |  |  |  |  |  |
Employee Plan 2009 [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sub plan for employees of Company's European subsidiaries for statutory payroll tax purposes nonvested shares vested over requisite service period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32.00% | 32.00% | 36.00%
Employee Plan 2017 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant-date fair value of nonvested shares granted to employees under Employee Plan | $ / shares |  |  |  |  |  | $ 16.52 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Plan 2017 [Member] | Performance Conditions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares to vest |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Plan 2017 [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration during the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,633,745 |  |  |  |  |  |  |  |  |
Employee Plan 2018 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant-date fair value of nonvested shares granted to employees under Employee Plan | $ / shares |  |  | $ 22.78 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Plan 2018 [Member] | Performance Conditions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares to vest |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Plan 2018 [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration during the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,442,327 |  |  |  |  |  |  |  |  |
Employee Plan 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant-date fair value of nonvested shares granted to employees under Employee Plan | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 19.28 |  |  |  |  |  |  |  |
Employee Plan 2019 [Member] | Performance Conditions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares to vest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 66.67% |  |  |  |  |  |  |  |
Employee Plan 2019 [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration during the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,172,160 |  |  |  |  |  |  |  |  |
Employee Plan 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average grant-date fair value of nonvested shares granted to employees under Employee Plan | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30.17 |  |  |  |  |  |  |  |  |
Options expected to vest, options (in shares) |  |  |  |  |  |  |  |  |  |  | 3,605,365 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,605,365 |  |  |  |  | 3,605,365 |  |  |  |
Employee Plan 2020 [Member] | Performance Conditions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares to vest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 66.67% |  |  |  |  |  |  |  |  |
Employee Plan 2020 [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfer of treasury shares to employees under the Company's share based remuneration during the year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 600 |  |  |  |  |  |  |  |  |
Tranche A [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company owned treasury stock |  |  |  |  |  |  |  |  |  |  | 11,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,400,000 |  |  |  |  | 11,400,000 |  |  |  |

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