Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 11	$ 11
Trade (net of allowance for doubtful receivables 2020: $-; 2019: $-)	25	26
Related companies	997	698
Other	34	27
Income taxes receivable	277	337
Notes receivable from related companies	862	1,660
Inventories	252	223
Other current assets	50	17
Total current assets	2,508	2,999
Investments in related companies	237	237
Other investments	22	22
Noncurrent receivables	126	124
Noncurrent receivables from related companies	69	66
Total investments	454	449
Property	7,145	7,089
Less accumulated depreciation	5,908	5,824
Net property	1,237	1,265
Intangible assets (net of accumulated amortization 2020: $92; 2019: $90)	14	16
Operating lease right-of-use assets	114	123
Deferred Tax Assets, Deferred Income	438	494
Deferred charges and other assets	37	29
Total other assets	603	662
Total Assets	4,802	5,375
Notes payable - related companies	31	33
Long-term debt due within one year	3	2
Trade	334	229
Related companies	380	409
Other	19	28
Operating lease liabilities - current	18	19
Income taxes payable	22	23
Asbestos-related liabilities - current	85	85
Accrued and other current liabilities	134	139
Total current liabilities	1,026	967
Long-Term Debt	393	391
Pension and other postretirement benefits - noncurrent	648	1,340
Asbestos-related liabilities - noncurrent	975	1,013
Operating lease liabilities - noncurrent	97	105
Other noncurrent obligations	225	201
Liabilities, Other than Long-term Debt, Noncurrent	1,945	2,659
Common stock (authorized: 1,000 shares of $0.01 par value each; issued: 935.51 shares)	0	0
Additional paid-in capital	141	141
Retained earnings	2,963	2,987
Accumulated other comprehensive loss	(1,666)	(1,770)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,438	1,358
Total Liabilities and Equity	$ 4,802	$ 5,375