Customer Financing (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Customer Financing [Line Items]
Financing Receivable, Nonaccrual, No Allowance	$ 378	$ 380
Financing Receivable, Nonaccrual, Interest Income	18	34
Sales-Type and Direct Financing Leases, Lease Income	54	57
Operating Lease, Lease Income	68	118
Sales-type and Direct Financing Leases, Profit (Loss)	78	26
Estimated residual value of leased assets	$ 110	$ 299
CCC Credit Rating [Member]
Customer Financing [Line Items]
Percentage Of Credit Default Rates Applied To Customers	24.20%
B Credit Rating [Member]
Customer Financing [Line Items]
Percentage Of Credit Default Rates Applied To Customers	5.50%
BB Credit Rating [Member]
Customer Financing [Line Items]
Percentage Of Credit Default Rates Applied To Customers	2.60%
BBB Credit Rating [Member]
Customer Financing [Line Items]
Percentage Of Credit Default Rates Applied To Customers	0.20%