Customer Financing (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Customer Financing [Line Items]
Financing Receivable, Nonaccrual	$ 412
Financing Receivable, Nonaccrual, No Allowance			$ 378
Financing Receivable, Nonaccrual, Interest Income	3	$ 6
Financing Receivable, before Allowance for Credit Loss	410		$ 412
Sales-Type and Direct Financing Leases, Lease Income	18	13
Operating Lease, Lease Income	15	18
Operating Lease, Variable Lease Income	4	2
Sales-type and Direct Financing Leases, Profit (Loss)	4	$ 16
Financial Asset, Past Due
Customer Financing [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 1
CCC Credit Rating
Customer Financing [Line Items]
Percentage of Credit Default Rates Applied to Customers	88.10%
B Credit Rating
Customer Financing [Line Items]
Percentage of Credit Default Rates Applied to Customers	26.80%
BB Credit Rating
Customer Financing [Line Items]
Percentage of Credit Default Rates Applied to Customers	3.40%
BBB Credit Rating
Customer Financing [Line Items]
Percentage of Credit Default Rates Applied to Customers	0.10%