| Schedule of Nonvested RSU, PSU and SPSU Activity |
| | | | | | | | | | Weighted | | | | | Average | | | Shares of RSU | | Grant Date | | | PSU and SPSU | | Fair Value | Beginning balance at January 1, 2021 (1) | | 4,159,261 | | $ | 6.27 | Granted (2) | | 3,583,764 | | | 7.70 | Forfeited | | (17,167) | | | 5.22 | Nonvested at March 31, 2021 | | 7,725,858 | | $ | 6.94 |
| (1) | Includes awards modified during 2020 where grant date fair value was not determined until 2021. |
| (2) | Excludes Tranche Years 2022 and 2023 awarded under the 2021 PSU award. |
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| Schedule of Stockholder's Equity |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Accumulated | | | | | | | | | | | Class A Voting | | Class B Voting | | Additional | | | | Other | | Accumulated | | Total AMC | | | | | | | Common Stock | | Common Stock | | Paid-in | | Treasury Stock | | Comprehensive | | Earnings | | Stockholders’ | | Noncontrolling | | Total | (In millions, except share and per share data) | | Shares | | Amount | | Shares | | Amount | | Capital | | Shares | | Amount | | Income (Loss) | | (Deficit) | | Equity (Deficit) | | Interests | | Deficit | Balances December 31, 2020 | | 172,563,249 | | $ | 1.8 | | 51,769,784 | | $ | 0.5 | | $ | 2,465.6 | | 3,732,625 | | $ | (56.4) | | $ | 38.7 | | $ | (5,335.3) | | $ | (2,885.1) | | $ | 26.9 | | $ | (2,858.2) | Net loss | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | (566.9) | | | (566.9) | | | (0.3) | | | (567.2) | Other comprehensive loss | | — | | | — | | — | | | — | | | — | | — | | | — | | | (51.0) | | | — | | | (51.0) | | | (0.2) | | | (51.2) | Baltics noncontrolling capital contribution | | — | | | — | | — | | | — | | | 0.2 | | — | | | — | | | — | | | — | | | 0.2 | | | (4.0) | | | (3.8) | Class A common stock, accrued dividend equivalent adjustment | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | (0.1) | | | (0.1) | | | — | | | (0.1) | Class A common stock issuance | | 187,066,293 | | | 1.8 | | — | | | — | | | 579.8 | | — | | | — | | | — | | | — | | | 581.6 | | | — | | | 581.6 | Wanda conversion of Class B shares to Class A shares | | 46,103,784 | | | 0.5 | | (46,103,784) | | | (0.5) | | | — | | — | | | — | | | — | | | — | | | — | | | — | | | — | Convertible Notes due 2026 stock conversion | | 44,422,860 | | | 0.4 | | — | | | — | | | 606.1 | | — | | | — | | | — | | | — | | | 606.5 | | | — | | | 606.5 | Wanda forfeit and cancellation of Class B shares | | — | | | — | | (5,666,000) | | | — | | | — | | — | | | — | | | — | | | — | | | — | | | — | | | — | Taxes paid for restricted unit withholdings | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | — | | | — | | | — | | | — | Stock-based compensation | | 124,054 | | | — | | — | | | — | | | 5.4 | | — | | | — | | | — | | | — | | | 5.4 | | | — | | | 5.4 | Balances March 31, 2021 | | 450,280,240 | | $ | 4.5 | | — | | $ | — | | $ | 3,657.1 | | 3,732,625 | | $ | (56.4) | | $ | (12.3) | | $ | (5,902.3) | | $ | (2,309.4) | | $ | 22.4 | | $ | (2,287.0) |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Accumulated | | | | | | | | | Class A Voting | | Class B Voting | | Additional | | | | | | | Other | | | | Total | | | Common Stock | | Common Stock | | Paid-in | | Treasury Stock | | Comprehensive | | Accumulated | | Stockholders’ | (In millions, except share and per share data) | | Shares | | Amount | | Shares | | Amount | | Capital | | Shares | | Amount | | Loss | | Deficit | | Equity (Deficit) | Balances December 31, 2019 | | 52,080,077 | | $ | 0.5 | | 51,769,784 | | $ | 0.5 | | $ | 2,001.9 | | 3,732,625 | | $ | (56.4) | | $ | (26.1) | | $ | (706.2) | | $ | 1,214.2 | Cumulative effect adjustment for the adoption of new accounting principle (ASU 2016-13) | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | (16.9) | | | (16.9) | Net loss | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | (2,176.3) | | | (2,176.3) | Other comprehensive loss | | — | | | — | | — | | | — | | | — | | — | | | — | | | (93.5) | | | — | | | (93.5) | Dividends declared: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Class A common stock, $0.03/share, net of forfeitures | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | (1.6) | | | (1.6) | Class B common stock, $0.03/share | | — | | | — | | — | | | — | | | — | | — | | | — | | | — | | | (1.6) | | | (1.6) | Taxes paid for restricted unit withholdings | | — | | | — | | — | | | — | | | (1.0) | | — | | | — | | | — | | | — | | | (1.0) | Stock-based compensation | | 469,516 | | | — | | — | | | — | | | 2.7 | | — | | | — | | | — | | | — | | | 2.7 | Balances March 31, 2020 | | 52,549,593 | | $ | 0.5 | | 51,769,784 | | $ | 0.5 | | $ | 2,003.6 | | 3,732,625 | | $ | (56.4) | | $ | (119.6) | | $ | (2,902.6) | | $ | (1,074.0) |
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