Significant Transactions (Details) $ in Millions, ¥ in Billions	1 Months Ended
	Oct. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 CNY (¥)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Asset Acquisition [Line Items]
Consolidated variable interest entity's assets included in condensed consolidated balance sheet		$ 275,905				$ 273,869
Goodwill		$ 70,189				$ 70,669	$ 68,725
Masergy
Asset Acquisition [Line Items]
Payments to acquire business	$ 1,200
Goodwill	$ 850
Variable Interest Entity, Primary Beneficiary | Universal Beijing Resort
Asset Acquisition [Line Items]
Ownership percentage in variable interest entity		30.00%	30.00%
Proceeds from borrowings		$ 3,600
Consolidated variable interest entity's assets included in condensed consolidated balance sheet		9,700
Consolidated variable interest entity's liabilities the balance sheet		8,100
Variable Interest Entity, Primary Beneficiary | Universal Beijing Resort | Universal Beijing Resort Term Loans
Asset Acquisition [Line Items]
Maximum borrowing capacity of revolving credit facilities		4,700	¥ 29.7	$ 4,200	¥ 26.6
Proceeds from borrowings		$ 3,100