Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Period Type:	duration

Partners' Capital and Distributions - Common Equity Repurchase Program (Details) - Common Equity Repurchase Program - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Nov. 30, 2020
Partners Capital and Distribution [Line Items]
Stock repurchase program, authorized amount			$ 500
Total purchase price of common units repurchased	$ 178	$ 50
Common equity repurchase program, remaining amount	$ 272
Maximum
Partners Capital and Distribution [Line Items]
Stock repurchase program, authorized amount			$ 500