Leases, Remaining Minimum Lease Payments (Details) - USD ($) $ in Millions		Sep. 30, 2020	Dec. 31, 2019
Operating Leases
Remainder of current year	[1]	$ 103
Year one		302	$ 376
Year two		223	250
Year three		187	194
Year four		150	160
Year five			125
Thereafter		525
Thereafter			498
Total undiscounted lease payments		1,490	1,603
Less: Amount associated with discounting		285	313
Total lease liabilities		1,205	1,290
Finance Leases
Remainder of current year	[1]	45
Year one		179	88
Year two		174	86
Year three		179	87
Year four		170	91
Year five			82
Thereafter		2,925
Thereafter			1,011
Total undiscounted lease payments		3,672	1,445
Less: Amount associated with discounting		1,426	654
Total lease liabilities		$ 2,246	$ 791

[1] The amounts as of September 30, 2020 are for the remaining three months of 2020.