Subsequent Events (Details) $ in Thousands, $ in Millions			6 Months Ended
	Jul. 31, 2020 USD ($)	Jul. 31, 2020 AUD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Subsequent Events
Cash and cash equivalents			$ 1,067,000	$ 371,000	$ 551,000
Accounts receivable, net			696,000	1,275,000	621,000
Property, plant and equipment, net			2,976,000	3,216,000	3,273,000
Other assets			1,471,000	1,615,000	1,544,000
Debt			(6,103,000)	(6,235,000)	(5,435,000)
Other long-term liabilities			(1,077,000)	(1,105,000)	$ (1,130,000)
Australia and New Zealand ("ANZ") | Discontinued Operations
Subsequent Events
Pretax profits			6,000	$ 13,000
Cash and cash equivalents			45
Accounts receivable, net			56
Inventories and other			154
Property, plant and equipment, net			266
Other assets			119
Accounts payable and other			(109)
Other long-term liabilities			(83)
Net assets			448
Accumulated Other Comprehensive Income Adjustment			123
Total			$ 571
Subsequent Events | Australia and New Zealand ("ANZ") | Discontinued Operations
Subsequent Events
Gross proceeds	$ 677,000	$ 947
Related sale lease-back gross proceeds		$ 214
Percentage of proceeds received at closing (as a percent)	95.00%	95.00%
Time over which the remaining balance will be paid	12 months	12 months