XML 22 R7.htm IDEA: XBRL DOCUMENT v3.22.0.1
Statement of Changes in Partners' Capital (Parenthetical) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Changes in Partners' Capital      
Addition of partnership units 30,400,000 86,500,000 44,600,000
Redemption of partnership units (45,500,000) (67,700,000) (28,500,000)