| Form N-CSR Cover | 12 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | T. ROWE PRICE CORPORATE INCOME FUND, INC. |
| Entity Central Index Key | 0000949820 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 12 Months Ended |
| May 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | T. ROWE PRICE CORPORATE INCOME FUND, INC. |
| Entity Central Index Key | 0000949820 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| C000166313 | |
| Shareholder Report [Line Items] | |
| Fund Name | Corporate Income Fund |
| Class Name | I Class |
| Trading Symbol | (TICCX) |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find the funds prospectus, financial information on Form N-CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at |
| Expenses [Text Block] | What were the fund costs for the last year? Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Corporate Income Fund - I Class $42 0.41% |
| Expenses Paid, Amount | $ 42 |
| Expense Ratio, Percent | 0.41% |
| Factors Affecting Performance [Text Block] | What drove fund performance during the past 12 months? The U.S. investment-grade bond market generated positive returns over the 12-month period ended May 31, 2024, largely lifted by a rally in rates and credit spreads near the end of 2023. Corporate bonds generated positive excess returns during the rally and the broader reporting period. Security selection within the banking sector, the consumer noncylical sector, and the communication sector boosted performance relative to its style-specific benchmark, the Bloomberg U.S. Corporate Investment Grade Bond Index. Asset allocation also contributed, with our underweight in capital goods notably outperforming verses the index. Key rate positioning hindered performance. Overweights to the 2-year, 5-year, and 10-year key rates detracted as the yields on the respective bonds ended the period higher. Similarly, the longer-duration profile held throughout mid-2023 hindered performance as yields rose. The Corporate Income Fund seeks to provide high income and some capital growth and primarily focuses on investment-grade, U.S. corporate bonds, with the ability to integrate nonindex sectors and securities in a measured fashion. Our allocation to U.S. corporate investment-grade bonds decreased slightly over the reporting period but continues to represent its largest absolute and relative position. We also increased our allocation to non-U.S. investment-grade bonds. While we are primarily a cash bond manager, we occasionally use derivatives, including interest rate futures and credit default swaps, in our strategy for positioning and to hedge overall portfolio risk. Over the last 12 months, our use of derivativesspecifically, interest rate derivativesdetracted from absolute performance. |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years Since Inception 12/17/2015 Corporate Income Fund (I Class) 5.15 % 0.70 % 2.26 % Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) 1.31 - 1.17 Bloomberg U.S. Corporate Investment Grade Bond Index (Strategy Benchmark) 4.40 0.98 2.55 The preceding line graph shows the value of a hypothetical $500,000 investment in the fund over the past 10 fiscal year periods or since inception (for funds lacking 10-year records). The funds performance information included in the line graph and table above is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the line graph and table may also include one or more indexes that more closely aligns to the fund's investment strategy (Strategy Benchmark(s)). Due to new SEC Rules on shareholder reporting the fund adopted a new broad-based securities market index, referred to as the Regulatory Benchmark. Market index returns do not include expenses, which are deducted from fund returns. The fund's total return figures reflect the reinvestment of dividends and capital gains, if any. Neither the funds returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares. The funds past performance is not a good predictor of the funds future performance. www.troweprice.com |
| AssetsNet | $ 541,725,000 |
| Holdings Count | Holding | 328 |
| Advisory Fees Paid, Amount | $ 603,000 |
| InvestmentCompanyPortfolioTurnover | 90.70% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $541,725 Number of Portfolio Holdings 328 |
| Holdings [Text Block] | Credit Quality Allocation* AAA Rated 0.9 % AA Rated 4.3 A Rated 31.6 BBB Rated 54.7 BB Rated and Below 3.7 Not Rated 1.4 U.S. Treasury Securities 1.6 Reserves 1.8 *Credit ratings for the securities held in the Fund are provided by Moodys, Standard & Poors, and Fitch and are converted to the Standard & Poors nomenclature. A rating of AAA represents the highest-rated securities, and a rating of D represents the lowest rated securities. If the ratings agencies differ, the highest rating is applied to the security. If a rating is not available, the security is classified as Not Rated. The rating of the underlying investment vehicle is used to determine the creditworthiness of credit default swaps and sovereign securities. The Fund is not rated by any agency. |
| Largest Holdings [Text Block] | Top Ten Holdings Citigroup 1.9 % U.S. Treasury Bonds 1.6 AbbVie 1.4 Morgan Stanley 1.4 Charter Communications Operating 1.4 Solventum 1.4 Rogers Communications 1.3 Goldman Sachs Group 1.2 CVS Health 1.2 Santander UK Group Holdings 1.2 |
| Material Fund Change [Text Block] | |
| C000005519 | |
| Shareholder Report [Line Items] | |
| Fund Name | Corporate Income Fund |
| Class Name | Investor Class |
| Trading Symbol | (PRPIX) |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find the funds prospectus, financial information on Form N-CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at |
| Expenses [Text Block] | What were the fund costs for the last year? Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Corporate Income Fund - Investor Class $60 0.59% |
| Expenses Paid, Amount | $ 60 |
| Expense Ratio, Percent | 0.59% |
| Factors Affecting Performance [Text Block] | What drove fund performance during the past 12 months? The U.S. investment-grade bond market generated positive returns over the 12-month period ended May 31, 2024, largely lifted by a rally in rates and credit spreads near the end of 2023. Corporate bonds generated positive excess returns during the rally and the broader reporting period. Security selection within the banking sector, the consumer noncylical sector, and the communication sector boosted performance relative to its style-specific benchmark, the Bloomberg U.S. Corporate Investment Grade Bond Index. Asset allocation also contributed, with our underweight in capital goods notably outperforming verses the index. Key rate positioning hindered performance. Overweights to the 2-year, 5-year, and 10-year key rates detracted as the yields on the respective bonds ended the period higher. Similarly, the longer-duration profile held throughout mid-2023 hindered performance as yields rose. The Corporate Income Fund seeks to provide high income and some capital growth and primarily focuses on investment-grade, U.S. corporate bonds, with the ability to integrate nonindex sectors and securities in a measured fashion. Our allocation to U.S. corporate investment-grade bonds decreased slightly over the reporting period but continues to represent its largest absolute and relative position. We also increased our allocation to non-U.S. investment-grade bonds. While we are primarily a cash bond manager, we occasionally use derivatives, including interest rate futures and credit default swaps, in our strategy for positioning and to hedge overall portfolio risk. Over the last 12 months, our use of derivativesspecifically, interest rate derivativesdetracted from absolute performance. |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Corporate Income Fund (Investor Class) 4.82 % 0.52 % 1.90 % Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) 1.31 - 1.26 Bloomberg U.S. Corporate Investment Grade Bond Index (Strategy Benchmark) 4.40 0.98 2.28 The preceding line graph shows the value of a hypothetical $10,000 investment in the fund over the past 10 fiscal year periods or since inception (for funds lacking 10-year records). The funds performance information included in the line graph and table above is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the line graph and table may also include one or more indexes that more closely aligns to the fund's investment strategy (Strategy Benchmark(s)). Due to new SEC Rules on shareholder reporting the fund adopted a new broad-based securities market index, referred to as the Regulatory Benchmark. Market index returns do not include expenses, which are deducted from fund returns. The fund's total return figures reflect the reinvestment of dividends and capital gains, if any. Neither the funds returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares. The funds past performance is not a good predictor of the funds future performance. www.troweprice.com |
| AssetsNet | $ 541,725,000 |
| Holdings Count | Holding | 328 |
| Advisory Fees Paid, Amount | $ 603,000 |
| InvestmentCompanyPortfolioTurnover | 90.70% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $541,725 Number of Portfolio Holdings 328 |
| Holdings [Text Block] | Credit Quality Allocation* AAA Rated 0.9 % AA Rated 4.3 A Rated 31.6 BBB Rated 54.7 BB Rated and Below 3.7 Not Rated 1.4 U.S. Treasury Securities 1.6 Reserves 1.8 *Credit ratings for the securities held in the Fund are provided by Moodys, Standard & Poors, and Fitch and are converted to the Standard & Poors nomenclature. A rating of AAA represents the highest-rated securities, and a rating of D represents the lowest rated securities. If the ratings agencies differ, the highest rating is applied to the security. If a rating is not available, the security is classified as Not Rated. The rating of the underlying investment vehicle is used to determine the creditworthiness of credit default swaps and sovereign securities. The Fund is not rated by any agency. |
| Largest Holdings [Text Block] | Top Ten Holdings Citigroup 1.9 % U.S. Treasury Bonds 1.6 AbbVie 1.4 Morgan Stanley 1.4 Charter Communications Operating 1.4 Solventum 1.4 Rogers Communications 1.3 Goldman Sachs Group 1.2 CVS Health 1.2 Santander UK Group Holdings 1.2 |
| Material Fund Change [Text Block] | |
| C000225817 | |
| Shareholder Report [Line Items] | |
| Fund Name | Corporate Income Fund |
| Class Name | Z Class |
| Trading Symbol | (TRZCX) |
| Annual or Semi-Annual Statement [Text Block] | Annual Shareholder Report |
| Shareholder Report Annual or Semi-Annual | annual shareholder report |
| Additional Information [Text Block] | You can find the funds prospectus, financial information on Form N-CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information at |
| Expenses [Text Block] | What were the fund costs for the last year? Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Corporate Income Fund - Z Class $0 0.00% |
| Expenses Paid, Amount | $ 0 |
| Expense Ratio, Percent | 0% |
| Factors Affecting Performance [Text Block] | What drove fund performance during the past 12 months? The U.S. investment-grade bond market generated positive returns over the 12-month period ended May 31, 2024, largely lifted by a rally in rates and credit spreads near the end of 2023. Corporate bonds generated positive excess returns during the rally and the broader reporting period. Security selection within the banking sector, the consumer noncylical sector, and the communication sector boosted performance relative to its style-specific benchmark, the Bloomberg U.S. Corporate Investment Grade Bond Index. Asset allocation also contributed, with our underweight in capital goods notably outperforming verses the index. Key rate positioning hindered performance. Overweights to the 2-year, 5-year, and 10-year key rates detracted as the yields on the respective bonds ended the period higher. Similarly, the longer-duration profile held throughout mid-2023 hindered performance as yields rose. The Corporate Income Fund seeks to provide high income and some capital growth and primarily focuses on investment-grade, U.S. corporate bonds, with the ability to integrate nonindex sectors and securities in a measured fashion. Our allocation to U.S. corporate investment-grade bonds decreased slightly over the reporting period but continues to represent its largest absolute and relative position. We also increased our allocation to non-U.S. investment-grade bonds. While we are primarily a cash bond manager, we occasionally use derivatives, including interest rate futures and credit default swaps, in our strategy for positioning and to hedge overall portfolio risk. Over the last 12 months, our use of derivativesspecifically, interest rate derivativesdetracted from absolute performance. |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year Since Inception 2/22/2021 Corporate Income Fund (Z Class) 5.44 % - % Bloomberg U.S. Aggregate Bond Index (Regulatory Benchmark) 1.31 - Bloomberg U.S. Corporate Investment Grade Bond Index (Strategy Benchmark) 4.40 - The preceding line graph shows the value of a hypothetical $10,000 investment in the fund over the past 10 fiscal year periods or since inception (for funds lacking 10-year records). The funds performance information included in the line graph and table above is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the line graph and table may also include one or more indexes that more closely aligns to the fund's investment strategy (Strategy Benchmark(s)). Due to new SEC Rules on shareholder reporting the fund adopted a new broad-based securities market index, referred to as the Regulatory Benchmark. Market index returns do not include expenses, which are deducted from fund returns. The fund's total return figures reflect the reinvestment of dividends and capital gains, if any. Neither the funds returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares. The funds past performance is not a good predictor of the funds future performance. www.troweprice.com |
| AssetsNet | $ 541,725,000 |
| Holdings Count | Holding | 328 |
| Advisory Fees Paid, Amount | $ 603,000 |
| InvestmentCompanyPortfolioTurnover | 90.70% |
| Additional Fund Statistics [Text Block] | What are some fund statistics? Fund Statistics Total Net Assets (000s) $541,725 Number of Portfolio Holdings 328 |
| Holdings [Text Block] | Credit Quality Allocation* AAA Rated 0.9 % AA Rated 4.3 A Rated 31.6 BBB Rated 54.7 BB Rated and Below 3.7 Not Rated 1.4 U.S. Treasury Securities 1.6 Reserves 1.8 *Credit ratings for the securities held in the Fund are provided by Moodys, Standard & Poors, and Fitch and are converted to the Standard & Poors nomenclature. A rating of AAA represents the highest-rated securities, and a rating of D represents the lowest rated securities. If the ratings agencies differ, the highest rating is applied to the security. If a rating is not available, the security is classified as Not Rated. The rating of the underlying investment vehicle is used to determine the creditworthiness of credit default swaps and sovereign securities. The Fund is not rated by any agency. |
| Largest Holdings [Text Block] | Top Ten Holdings Citigroup 1.9 % U.S. Treasury Bonds 1.6 AbbVie 1.4 Morgan Stanley 1.4 Charter Communications Operating 1.4 Solventum 1.4 Rogers Communications 1.3 Goldman Sachs Group 1.2 CVS Health 1.2 Santander UK Group Holdings 1.2 |
| Material Fund Change [Text Block] |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 39 Months Ended | 60 Months Ended | 101 Months Ended | 120 Months Ended |
| May 31, 2024 | May 31, 2024 | May 31, 2024 | May 31, 2024 | May 31, 2024 | |
| Without Sales Load [Member] | C000166313 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 5.15% | 0.70% | 2.26% | ||
| Without Sales Load [Member] | C000005519 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 4.82% | 0.52% | 1.90% | ||
| Without Sales Load [Member] | C000225817 | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 5.44% | (2.25%) | |||
| Bloomberg U.S. Aggregate Bond Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 1.31% | (0.17%) | 1.17% | ||
| Bloomberg U.S. Aggregate Bond Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 1.31% | (0.17%) | 1.26% | ||
| Bloomberg U.S. Aggregate Bond Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 1.31% | (2.93%) | |||
| Bloomberg U.S. Corporate Investment Grade Bond Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 4.40% | 0.98% | 2.55% | ||
| Bloomberg U.S. Corporate Investment Grade Bond Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 4.40% | 0.98% | 2.28% | ||
| Bloomberg U.S. Corporate Investment Grade Bond Index | |||||
| Average Annual Return [Line Items] | |||||
| Average Annual Return, Percent | 4.40% | (2.46%) |
| Shareholder Report, Holdings (Details) | May 31, 2024 |
| C000166313 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000166313 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000166313 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.60% |
| C000166313 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.70% |
| C000166313 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000166313 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000166313 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000005519 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000005519 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000005519 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.60% |
| C000005519 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.70% |
| C000005519 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000005519 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000005519 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| C000225817 | AAA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| C000225817 | AA Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| C000225817 | A Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 31.60% |
| C000225817 | BBB Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 54.70% |
| C000225817 | BB Rated and Below | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.70% |
| C000225817 | Not Rated | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| C000225817 | U.S. Treasury Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
