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Series A Preferred Units (Tables)
9 Months Ended
Sep. 30, 2020
Temporary Equity Disclosure [Abstract]  
Rollforward of Redeemable Preferred Units The changes in the redeemable preferred balance from December 31, 2019 through September 30, 2020 are summarized below:
(In millions)
Redeemable Series A Preferred Units
Balance at December 31, 2019
$
968

Net income allocated
61

Distributions received by Series A preferred unitholders
(61
)
Balance at September 30, 2020
$
968