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Related Party Transactions - Narrative (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($) people	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Investment securities	$ 1,041	$ 1,041	$ 1,532
Accounts Payable, GE and its affiliates
Related Party Transaction [Line Items]
Accounts payable,	278	278	356
Accounts Receivable, GE and its affiliates
Related Party Transaction [Line Items]
Accounts receivable	481	481	429
GE, majority shareholder \| Purchases, GE and its affiliates
Related Party Transaction [Line Items]
Related party purchases		1,319	1,446	$ 1,498
GE, majority shareholder \| Sales of products and services, GE and its affiliates
Related Party Transaction [Line Items]
Revenue from related parties		191	216	$ 337
GE \| Purchases, GE and its affiliates
Related Party Transaction [Line Items]
Accounts Receivable, before Allowance for Credit Loss	67	67	78
GE \| Related party amount, due to related party
Related Party Transaction [Line Items]
Cash held on behalf of GE			45
Cash held on behalf of GE			44
Investment securities			$ 1
JV aero-derivative gas turbine products and services \| C3 AI
Related Party Transaction [Line Items]
Purchase commitment to be paid 2023	85	85
Purchase commitment to be paid 2024	110	110
Purchase commitment to be paid 2025	$ 125	$ 125
GE \| GE
Related Party Transaction [Line Items]
Voting power of outstanding common stock	20.00%
Board of directors nomination, upon triggering event \| people	1
GE \| GE \| BHH LLC
Related Party Transaction [Line Items]
Ownership percentage by noncontrolling owners	11.40%	11.40%