CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Operating Lease, Liability, Noncurrent	$ 3	$ 5
Operating Lease, Right-of-Use Asset	4	5
Current assets:
Cash and cash equivalents	0	0
Accounts receivable, net	50	47
Accounts receivable from related companies	8	8
Exchanges receivable	7	6
Inventories	57	86
Other current assets	5	6
Total current assets	127	153
Property, plant and equipment
Total property, plant and equipment	3,421	3,349
Accumulated depreciation	(813)	(717)
Property, plant and equipment, net	2,608	2,632
Other Assets, Noncurrent	192	172
Total assets	2,931	2,962
Current liabilities:
Accounts payable to related companies	25	14
Exchanges payable	22	71
Other current liabilities	62	33
Total current liabilities	148	122
Long-term debt, less current maturities	243	245
Note payable to related company	221	550
Other non-current liabilities	312	246
Commitments and contingencies
Partners’ capital:
Partners’ capital	2,001	1,803
Accumulated other comprehensive income (loss)	3	(9)
Total partners’ capital	2,004	1,794
Total liabilities and partners’ capital	2,931	2,962
Accounts payable	$ 39	$ 4

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).