Stock-Based Compensation	3 Months Ended
	Mar. 31, 2022
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based CompensationWe issue stock-based incentive awards to our eligible employees under the 2019 Stock Incentive Plan ("2019 Plan") and to our eligible non-employee Directors under a Director Deferred Stock Ownership Plan. The 2019 Plan permits the granting of incentive stock options, nonqualified stock options, stock appreciation rights, performance stock, restricted stock and other stock-based awards.For the three months ended March 31, 2022 and 2021, total stock-based compensation expense primarily related to restricted stock and unit awards was $94 million and $19 million, respectively. For the three months ended March 31, 2022, stock-based compensation expense primarily related to the early vesting of IHS Markit equity awards as a result of employee terminations and restructuring efforts. During the three month ended March 31, 2022, the Company granted 0.6 million shares of restricted stock and unit awards, which had a weighted average grant date fair value of $390.58 per share. Total unrecognized compensation expense related to unvested restricted stock and unit awards as of March 31, 2022 was $422 million, which is expected to be recognized over a weighted average period of 2.2 years.