Contract and Other Deferred Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract assets (revenue in excess of billings)	$ 1,700,000,000		$ 1,820,000,000
Deferred inventory costs	159,000,000		138,000,000
Non-recurring engineering costs	40,000,000		43,000,000
Contract and other deferred assets	1,899,000,000		2,001,000,000
Revenue recognized from performance obligations satisfied in previous periods	0	$ 6,000,000
Long-term product service agreements
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract assets (revenue in excess of billings)	612,000,000		660,000,000
Long-term equipment contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract assets (revenue in excess of billings)	$ 1,088,000,000		$ 1,160,000,000