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Earnings Per Share - Shares of Common Stock Outstanding (Details) - shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Common Stock Outstanding [Roll Forward] |  |  |
Balance, Beginning of Year (in shares) | 220,440,993 |  |
Balance, End of Year (in shares) | 203,531,320 | 220,440,993 |
Common Stock |  |  |
Common Stock Outstanding [Roll Forward] |  |  |
Balance, Beginning of Year (in shares) | 220,440,993 | 186,642,962 | 198,663,342
Issuance Related to Stock-Based Compensation (in shares) | 1,374,925 | 882,335 | 909,107
Retirement of Common Stock (in shares) | (18,284,598) | (4,138,527) | (12,929,487)
Issuance Related to CNXM Merger (in shares) | 0 | 37,054,223 | 0
Balance, End of Year (in shares) | 203,531,320 | 220,440,993 | 186,642,962

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