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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Operating activities:    
Net income $ 3,690.7 $ 3,519.8
Reconciliation of net income to net cash flows provided by operating activities:    
Depreciation and accretion 1,281.0 1,262.6
Amortization of intangible assets 113.3 109.3
Amortization of major maintenance costs for reaction-based plants 19.0 0.0
Other amortization expense 180.4 173.2
Impairment of assets other than goodwill 112.9 90.4
Equity in income of unconsolidated affiliates (447.2) (336.1)
Distributions received from unconsolidated affiliates attributable to earnings 405.9 337.4
Net losses (gains) attributable to asset sales and related matters 8.4 (2.1)
Deferred income tax expense (benefit) 33.1 (149.0)
Change in fair market value of derivative instruments (86.3) (53.7)
Change in fair market value of Liquidity Option 0.0 2.3
Non-cash expense related to long-term operating leases 29.5 29.6
Net effect of changes in operating accounts 1,047.1 (692.0)
Other operating activities (0.5) (0.1)
Net cash flows provided by operating activities 6,387.3 4,291.6
Investing activities:    
Capital expenditures (1,805.7) (2,671.6)
Investments in unconsolidated affiliates (1.3) (9.9)
Distributions received from unconsolidated affiliates attributable to the return of capital 41.2 124.9
Proceeds from asset sales 58.1 8.4
Other investing activities (13.8) (16.0)
Cash used in investing activities (1,721.5) (2,564.2)
Financing activities:    
Borrowings under debt agreements 11,158.5 6,672.1
Repayments of debt (11,491.8) (4,406.6)
Debt issuance costs (15.1) (46.3)
Monetization of interest rate derivative instruments 75.2 (33.3)
Cash distributions paid to common unitholders (2,948.5) (2,919.6)
Cash payments made in connection with distribution equivalent rights (23.1) (20.0)
Cash distributions paid to noncontrolling interests (115.1) (97.8)
Cash contributions from noncontrolling interests 23.0 21.2
Repurchase of common units under 2019 Buyback Program (88.8) (173.8)
Net cash proceeds from the issuance of preferred units 0.0 32.5
Other financing activities (40.1) (34.7)
Cash used in financing activities (3,465.8) (1,006.3)
Net change in cash and cash equivalents, including restricted cash 1,200.0 721.1
Cash and cash equivalents, including restricted cash, at beginning of period 1,158.1 410.0
Cash and cash equivalents, including restricted cash, at end of period $ 2,358.1 $ 1,131.1