Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 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: $-)	24	26
Related companies	709	698
Other	35	27
Income taxes receivable	375	337
Notes receivable from related companies	1,055	1,660
Inventories	248	223
Other current assets	19	17
Total current assets	2,476	2,999
Investments in related companies	237	237
Other investments	22	22
Noncurrent receivables	129	124
Noncurrent receivables from related companies	68	66
Total investments	456	449
Property	7,111	7,089
Less accumulated depreciation	5,865	5,824
Net property	1,246	1,265
Intangible assets (net of accumulated amortization 2020: $92; 2019: $90)	15	16
Operating lease right-of-use assets	119	123
Deferred Tax Assets, Deferred Income	472	494
Deferred charges and other assets	38	29
Total other assets	644	662
Total Assets	4,822	5,375
Notes payable - related companies	29	33
Long-term debt due within one year	2	2
Trade	260	229
Related companies	533	409
Other	16	28
Operating lease liabilities - current	19	19
Income taxes payable	22	23
Asbestos-related liabilities - current	85	85
Accrued and other current liabilities	127	139
Total current liabilities	1,093	967
Long-Term Debt	391	391
Pension and other postretirement benefits - noncurrent	680	1,340
Asbestos-related liabilities - noncurrent	995	1,013
Operating lease liabilities - noncurrent	101	105
Other noncurrent obligations	209	201
Liabilities, Other than Long-term Debt, Noncurrent	1,985	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	2,898	2,987
Accumulated other comprehensive loss	(1,686)	(1,770)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,353	1,358
Total Liabilities and Equity	$ 4,822	$ 5,375