CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING REVENUES:
Total operating revenues	$ 1,870	$ 1,868	$ 1,752
OPERATING EXPENSES:
Cost of Goods and Services Sold	1,371	1,321	1,271
Other operating expenses	64	65	51
General and administrative expenses	122	115	112
Depreciation and amortization expense	221	218	215
Impairment charges	2	86	2
Total operating expense	1,780	1,805	1,651
Operating income	90	63	101
Other income (expense):
Interest expense	(143)	(145)	(147)
Net gain on sale of business and investments	49	217	(6)
Loss on extinguishment of debt	0	(15)	(84)
Other income (expense), net	1	(3)	1
Total other (expense) income	(93)	54	(236)
(Loss) income before income tax benefit and equity in net income from unconsolidated investments	(3)	117	(135)
Income Tax Expense (Benefit)	(7)	(29)	(191)
Equity in net income from unconsolidated investments	6	6	1
Net income	$ 10	$ 152	$ 57
Weighted Average Common Shares Outstanding [Abstract]
Basic	131	130	130
Diluted	133	132	131
Earnings Per Share:
Basic	$ 0.07	$ 1.17	$ 0.44
Diluted	0.07	1.15	0.44
Cash Dividend Declared Per Share:	$ 1.00	$ 1.00	$ 1.00
Waste And Service [Member]
OPERATING REVENUES:
Total operating revenues	$ 1,393	$ 1,327	$ 1,231
Electricity [Member]
OPERATING REVENUES:
Total operating revenues	329	343	334
Recycled Metals [Member]
OPERATING REVENUES:
Total operating revenues	86	95	82
Other Revenue [Member]
OPERATING REVENUES:
Total operating revenues	$ 62	$ 103	$ 105