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v3.25.3

Statement of Cash Flows (Unaudited) - NWP - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] |  |
Net income | $ 1,995 | $ 1,829
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] |  |
Depreciation, depletion, and amortization | 1,754 | 1,654
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] |  |
Increase (Decrease) in Inventories | (66) | (6)
Increase (Decrease) in Other Current Assets | (43) | (16)
Other current liabilities | 95 | (108)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item | (128) | (200)
Net cash provided (used) by operating activities | 4,322 | 3,756
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] |  |
Net cash provided (used) by financing activities | (1,110) | (1,351)
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] |  |
Capital expenditures (1) | (2,938) | (1,805)
Net cash provided (used) by investing activities | (3,202) | (3,793)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total | 10 | (1,388)
Cash and cash equivalents at beginning of year | 60 | 2,150
Cash and cash equivalents at end of period | 70 | 762
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] |  |
Property, Plant and Equipment, Additions | (3,079) | (1,840)
Capital expenditures | (2,938) | (1,805)
Northwest Pipeline LLC [Member] |  |
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] |  |
Net income | 135 | 134
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] |  |
Depreciation, depletion, and amortization | 88 | 82
Increase (Decrease) in Allowance for Equity Funds Used During Construction | (6) | (7)
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] |  |
Increase (Decrease) in Accounts and Other Receivables | 3 | 6
Increase (Decrease) in Other Current Assets | 1 | 0
Increase (Decrease) in Accounts Payable, Trade | (6) | (4)
Increase (Decrease) in Accounts Payable, Related Parties | (3) | (3)
Other current liabilities | 9 | 15
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item | (40) | (23)
Net cash provided (used) by operating activities | 181 | 200
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] |  |
Cash distributions to parent | (106) | (113)
Cash contributions from parent | 181 | 0
Increase Decrease In Advances From Affiliates | (26) | 0
Net cash provided (used) by financing activities | 49 | (113)
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] |  |
Capital expenditures (1) | (149) | (178)
Contributions in aid of construction | 6 | 5
Payments for (Proceeds from) Removal Costs | (17) | (9)
IncreaseDecreaseInAdvancesToAffiliates | (70) | 95
Net cash provided (used) by investing activities | (230) | (87)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total | 0 | 0
Cash and cash equivalents at beginning of year | 0 | 0
Cash and cash equivalents at end of period | 0 | 0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] |  |
Property, Plant and Equipment, Additions | (170) | (213)
Increase (Decrease) in Accounts Payable And Accrued Liabilities Related To Capital Expenditures | 21 | 35
Capital expenditures | $ (149) | $ (178)

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