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Advances to and Investments in Unconsolidated Affiliates Investment in Affiliates (Carrying Values) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity in earnings of unconsolidated affiliates		$ 246	$ 119	$ 302
Investments in unconsolidated affiliates		2,947	3,060	3,460
Citrus [Member]
Equity in earnings of unconsolidated affiliates		157	162	148
Investments in unconsolidated affiliates		1,792	1,867
FEP [Member]
Equity in earnings of unconsolidated affiliates	[1]	0	(139)	59
Investments in unconsolidated affiliates		0	4
MEP [Member]
Equity in earnings of unconsolidated affiliates		(17)	(6)	15
Investments in unconsolidated affiliates		378	406
Other Affiliates [Member]
Equity in earnings of unconsolidated affiliates		106	82	76
White Cliffs
Equity in earnings of unconsolidated affiliates		0	20	$ 4
Investments in unconsolidated affiliates		245	274
Other
Investments in unconsolidated affiliates		$ 532	$ 509
[1] For the year ended December 31, 2020, equity in earnings (losses) of unconsolidated affiliates includes the impact of non-cash impairments recorded by FEP, which reduced the Partnership’s equity in earnings by $208 million.

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