Non-Controlling Interest (Details)				1 Months Ended	12 Months Ended		24 Months Ended
	Oct. 06, 2020 USD ($) shares	Jul. 02, 2019 USD ($)	May 16, 2019 USD ($) shares	Jul. 31, 2019 USD ($) segment $ / shares shares	Dec. 31, 2020 USD ($) seat shares	Dec. 31, 2019 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jul. 06, 2020 USD ($)
Noncontrolling Interest [Line Items]
Non-controlling interests represented by subsidiaries’ preferred units and preferred stock					$ 1,300,000,000	$ 1,000,000,000.0
Private Placement
Noncontrolling Interest [Line Items]
Stock issued during period (in shares) | shares			11,000,000
Proceeds from issuance of common stock			$ 500,000,000
Cornershop Global LLC
Noncontrolling Interest [Line Items]
Redeemable non-controlling interests									$ 290,000,000
Fair value adjustment of redeemable non-controlling interest					$ 0
Freight Holding
Noncontrolling Interest [Line Items]
Ownership percentage in non-controlling interest					85.00%	89.00%
Diluted ownership percentage in non-controlling interest					79.00%	80.00%
Shares reserved (in shares) | shares					99,800,000
Shares available for grant and issuance (in shares) | shares					83,800,000
Liquidation preference, multiplier					150.00%
Preferred shared, compounding dividend (in percent)					6.00%
Cornershop Global LLC
Noncontrolling Interest [Line Items]
Ownership percentage in non-controlling interest									55.00%
Apparate | Volatility | Level 3
Noncontrolling Interest [Line Items]
Unobservable measurement input				0.42
Apparate | Time to Liquidity | Level 3
Noncontrolling Interest [Line Items]
Unobservable measurement input				5 years
Apparate | Discount for Lack of Marketability | Level 3
Noncontrolling Interest [Line Items]
Unobservable measurement input				0.17
Greenbriar Equity Group, L.P.
Noncontrolling Interest [Line Items]
Initial ownership interest	8.00%
Greenbriar Equity Group, L.P. | Freight Holding
Noncontrolling Interest [Line Items]
Number of seats held on the board of directors | seat					1
Uber Freight Holding Corporation | Private Placement
Noncontrolling Interest [Line Items]
Stock issued during period (in shares) | shares	124,744,896
Proceeds from issuance of common stock	$ 250,000,000
Uber Freight Holding Corporation | Private Placement | Forecast
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock							$ 250,000,000	$ 500,000,000
Option to purchase additional shares per tranche							$ 50,000,000
Term of option to purchase additional stock							2 years
ATG Investment
Noncontrolling Interest [Line Items]
Term of agreement				3 years
Number of semi-annual installments | segment				6
ATG Investment | Apparate
Noncontrolling Interest [Line Items]
Initial ownership interest					85.80%
ATG Investment | Preferred Class A
Noncontrolling Interest [Line Items]
Initial ownership interest		13.80%			14.20%
ATG Investment | Apparate
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock				$ 1,000,000,000.0
ATG Investment | Apparate | ATG and Other Technology Programs collaboration revenue
Noncontrolling Interest [Line Items]
Revenue recognized from redeemable non-controlling interest					$ 100,000,000	$ 42,000,000
ATG Investment | Apparate | Toyota
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock				400,000,000
ATG Investment | Apparate | Softbank
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock				333,000,000
ATG Investment | Apparate | DENSO
Noncontrolling Interest [Line Items]
Proceeds from issuance of common stock				$ 267,000,000
ATG Investment | Apparate | Preferred Class A
Noncontrolling Interest [Line Items]
Stock issued during period (in shares) | shares				1,000,000.0
Preferred stock units issued (in dollars per share) | $ / shares				$ 1,000
Annual dividend rate				4.50%
ATG Investment | Toyota
Noncontrolling Interest [Line Items]
Aggregate installment amount		$ 300,000,000