| Schedule of Stockholders Equity [Table Text Block] |
The activity in equity during the three and six-month periods ended June 30, 2024 and 2023 was as follows (dollars in millions, except per share amounts): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Common Stock | | Accumulated Other Comprehensive Loss | | Retained Earnings | | | | | | | | | | | | | | Shares | | Amount | | | | Total | | | Balances as of December 31, 2023 | 101,159,609 | | | $ | 1,750 | | | $ | (5) | | | $ | 1,574 | | | $ | 3,319 | | | | | | Issuances of shares pursuant to equity-based plans | 148,926 | | | — | | | — | | | — | | | — | | | | | Issuances of shares pursuant to equity agreements | 1,714,972 | | | 78 | | | — | | | — | | | 78 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dividends declared ($0.4750 per share) | — | | | — | | | — | | | (48) | | | (48) | | | | | | Net income | — | | | — | | | — | | | 109 | | | 109 | | | | | Other comprehensive income | — | | | — | | | 1 | | | — | | | 1 | | | | | Balances as of March 31, 2024 | 103,023,507 | | | $ | 1,828 | | | $ | (4) | | | $ | 1,635 | | | $ | 3,459 | | | | | | Issuances of shares pursuant to equity-based plans | 43,176 | | | 1 | | | — | | | — | | | 1 | | | | | | | | | | | | | | | | | | | Stock-based compensation | — | | | 4 | | | — | | | — | | | 4 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dividends declared ($0.5000 per share) | — | | | — | | | — | | | (52) | | | (52) | | | | | | Net income | — | | | — | | | — | | | 72 | | | 72 | | | | | Balances as of June 30, 2024 | 103,066,683 | | | $ | 1,833 | | | $ | (4) | | | $ | 1,655 | | | $ | 3,484 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Balances as of December 31, 2022 | 89,283,353 | | | $ | 1,249 | | | $ | (4) | | | $ | 1,534 | | | $ | 2,779 | | | | | | Issuances of shares pursuant to equity-based plans | 159,603 | | | — | | | — | | | — | | | — | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Issuances of shares pursuant to equity agreements | 7,178,016 | | | 300 | | | — | | | — | | | 300 | | | | | | Stock-based compensation | — | | | (1) | | | — | | | — | | | (1) | | | | | Dividends declared ($0.4525 per share) | — | | | — | | | — | | | (40) | | | (40) | | | | | | Net income | — | | | — | | | — | | | 74 | | | 74 | | | | | Balances as of March 31, 2023 | 96,620,972 | | | $ | 1,548 | | | $ | (4) | | | $ | 1,568 | | | $ | 3,112 | | | | | | Issuances of shares pursuant to equity-based plans | 30,245 | | | 1 | | | — | | | — | | | 1 | | | | | Issuances of shares pursuant to equity agreements | 2,212,610 | | | 92 | | | | | | | 92 | | | | | | Stock-based compensation | — | | | 6 | | | — | | | — | | | 6 | | | | | | Other comprehensive income | — | | | — | | | 1 | | | — | | | 1 | | | | | | | | | | | | | | | | | | Dividends declared ($0.4750 per share) | — | | | — | | | — | | | (51) | | | (51) | | | | | | Net income | — | | | — | | | — | | | 39 | | | 39 | | | | | Balances as of June 30, 2023 | 98,863,827 | | | $ | 1,647 | | | $ | (3) | | | $ | 1,556 | | | $ | 3,200 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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