Revenues - Costs to Fulfill a Contract with a Customer (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Capitalized Costs To Fulfill Sales Contracts | Operating Expense
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	$ 124	$ 113	$ 98
Capitalized Costs To Fulfill Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Deferred cost balance	58	47
MA | Capitalized Costs To Obtain Sales Contracts
Disaggregation of Revenue [Line Items]
Deferred cost balance	183	180
MA | Capitalized Costs To Obtain Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	60	59	53
MA | Capitalized Costs To Fulfill Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Deferred cost balance	44	35
MA | Royalty Cost | Operating Expense
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	76	66	56
MIS | Capitalized Costs To Fulfill Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Deferred cost balance	14	12
MIS | Capitalization of Work-In-Process for In-Progress Ratings | Operating Expense
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	$ 48	$ 47	$ 42