XML 62 R51.htm IDEA: XBRL DOCUMENT v3.23.1
Capital Accounts, Issuances of Equity (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2023
USD ($)
shares
Net Cash Proceeds from Sale of Common Units [Abstract]  
Common units issued in connection with the vesting of phantom unit awards, net (in units) | shares 4,364,301
Buyback Program:  
Total of common units repurchased under a buyback program (in units) | shares 682,589
Common units acquired in connection with buyback program $ 17
Long-Term Incentive Plan (2008) [Member]  
Net Cash Proceeds from Sale of Common Units [Abstract]  
Common units issued in connection with the vesting of phantom unit awards, net (in units) | shares 4,364,301
2019 Buyback Program [Member]  
Buyback Program:  
Amount authorized under 2019 Buyback Program $ 2,000
Remaining available capacity under the 2019 Buyback Program $ 1,300
Total of common units repurchased under a buyback program (in units) | shares 682,589
Common units acquired in connection with buyback program $ 17
At-the-Market Registration [Member]  
Registration Statements and Equity Offerings [Line Items]  
Maximum common units authorized for issuance 2,500
Remaining units available for issuance 2,500
Employee Unit Purchase Plan [Member]  
Net Cash Proceeds from Sale of Common Units [Abstract]  
Employer contribution to EUPP $ 1
Distribution Reinvestment and Employee Unit Purchase Plans [Member]  
Net Cash Proceeds from Sale of Common Units [Abstract]  
Number of common units purchased on the open market and delivered to participants (in units) | shares 1,653,454