Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 2,782	$ 2,855	$ 2,793	$ 3,032	$ 3,114	$ 3,127	$ 3,188	$ 3,194	$ 11,462	$ 12,623	$ 12,382
Net property and net investment in operating leases	26,874				27,871				26,874	27,871	27,641
United States [member]
Segment Reporting Information [Line Items]
Total revenue									8,780	9,472	9,043
Net property and net investment in operating leases	22,891				24,123				22,891	24,123	24,057
Canada
Segment Reporting Information [Line Items]
Total revenue									1,240	1,323	1,315
Net property and net investment in operating leases	3,588				3,328				3,588	3,328	3,155
All Other
Segment Reporting Information [Line Items]
Total revenue									1,442	1,828	2,024
Net property and net investment in operating leases	$ 395				$ 420				$ 395	$ 420	$ 429