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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Consolidated net income $ 1,389 $ 921
Adjustments to reconcile consolidated net income to net cash flows from operating activities:    
Depreciation and amortization 2,294 2,441
Stock compensation expense 147 134
Noncash interest income, net (3) (7)
Deferred income taxes 38 156
Other, net (21) (5)
Changes in operating assets and liabilities, net of effects from acquisitions and dispositions:    
Accounts receivable 49 144
Prepaid expenses and other assets (185) (182)
Accounts payable, accrued liabilities and other (61) 149
Net cash flows from operating activities 3,647 3,751
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (1,857) (1,821)
Change in accrued expenses related to capital expenditures 10 (75)
Other, net 60 (60)
Net cash flows from investing activities (1,787) (1,956)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Borrowings of long-term debt 6,713 5,289
Repayments of long-term debt (2,954) (3,164)
Payments for debt issuance costs (37) (22)
Purchase of treasury stock (3,333) (3,652)
Proceeds from exercise of stock options 1 9
Purchase of noncontrolling interest (416) (507)
Distributions to noncontrolling interest (2) (39)
Other, net (2) 62
Net cash flows from financing activities (30) (2,024)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 1,830 (229)
CASH AND CASH EQUIVALENTS, beginning of period 601 1,001
CASH AND CASH EQUIVALENTS, end of period 2,431 772
CASH PAID FOR INTEREST 982 1,017
CASH PAID FOR TAXES $ 29 $ 20