Leases, Remaining Minimum Lease Payments (Details) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Operating Leases
Remainder of current year	[1]	$ 207
Year one		287	$ 376
Year two		214	250
Year three		179	194
Year four		142	160
Year five			125
Thereafter		510
Thereafter			498
Total undiscounted lease payments		1,539	1,603
Less: Amount associated with discounting		294	313
Total lease liabilities		1,245	1,290
Finance Leases
Remainder of current year	[1]	85
Year one		171	88
Year two		173	86
Year three		178	87
Year four		170	91
Year five			82
Thereafter		2,922
Thereafter			1,011
Total undiscounted lease payments		3,699	1,445
Less: Amount associated with discounting		1,451	654
Total lease liabilities		$ 2,248	$ 791

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