Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($)		3 Months Ended			9 Months Ended
	Jul. 29, 2019	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Restricted cash and cash equivalents		$ 14,000,000	$ 40,000,000		$ 14,000,000
Allowance for doubtful accounts		47,000,000	39,000,000		47,000,000
Goodwill impairment			0
Accumulated impairment loss		0			0
Equity securities without a readily determinable fair value		165,000,000	167,000,000		165,000,000
Interest expense		176,000,000		$ 187,000,000	541,000,000	$ 309,000,000
Interest income		2,000,000		23,000,000	6,000,000	30,000,000
First Data
Business Acquisition [Line Items]
Percentage of business acquired	100.00%
Total purchase price for acquisition	$ 46,475,000,000
Merchant credit losses
Business Acquisition [Line Items]
Aggregate merchant credit losses incurred		35,000,000		$ 17,000,000	89,000,000	$ 17,000,000
Collateral held		982,000,000	510,000,000		982,000,000
Loss contingency accrual		$ 63,000,000	$ 34,000,000		$ 63,000,000