Acquisitions and Divestitures - Divestitures Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions	$ 11	$ 16	$ 49
Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions	11	16	49
Sale | S&P Global's CUSIP Global Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture consideration	1,925
Sale | Office facility in India
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions	8
Gain on disposition after tax	6
Sale | SPIAS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions	3	1	22
Gain on disposition after tax	$ 3	1	12
Sale | IR webhosting business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions		11
Gain on disposition after tax		6
Sale | Facility at East Windsor, New Jersey
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions		4
Gain on disposition after tax		$ 3
Sale | RigData
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on dispositions			27
Gain on disposition after tax			$ 26