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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities    
Net income $ 466 $ 703
Reconciliation of net income to net cash provided by operating activities:    
Depreciation 321 302
Deferred income taxes (15) 48
Gains and losses on properties (4) (6)
Changes in assets and liabilities affecting operations:    
Accounts receivable (22) (94)
Materials and supplies (9) (46)
Other current assets 12 21
Current liabilities other than debt 480 83
Other – net (56) (17)
Net cash provided by operating activities 1,173 994
Cash flows from investing activities    
Property additions (428) (389)
Property sales and other transactions 20 36
Investment purchases 0 (1)
Investment sales and other transactions 17 19
Net cash used in investing activities (391) (335)
Cash flows from financing activities    
Dividends (307) (297)
Common stock transactions (10) (18)
Purchase and retirement of common stock (163) (600)
Proceeds from borrowings 594 989
Debt repayments (800) (1)
Net cash provided by (used in) financing activities (686) 73
Net increase in cash and cash equivalents 96 732
Cash and cash equivalents    
At beginning of year 456 839
At end of period 552 1,571
Supplemental disclosures of cash flow information    
Interest (net of amounts capitalized) 129 114
Income taxes (net of refunds) $ (1) $ 9