CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net income	$ 1,170	$ 1,146
Adjustments to reconcile consolidated net income to net cash flows from operating activities:
Depreciation and amortization	7,465	7,784
Stock compensation expense	238	213
Accelerated vesting of equity awards	0	5
Noncash interest income, net	(89)	(242)
Other pension benefits, net	(27)	(247)
Loss on financial instruments, net	116	0
Deferred income taxes	233	137
Other, net	148	81
Changes in operating assets and liabilities, net of effects from acquisitions and dispositions:
Accounts receivable	(564)	(101)
Prepaid expenses and other assets	(225)	(97)
Accounts payable, accrued liabilities and other	(75)	(80)
Net cash flows from operating activities	8,390	8,599
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(4,913)	(6,692)
Change in accrued expenses related to capital expenditures	(449)	(620)
Real estate investments through variable interest entities	(125)	(15)
Other, net	10	(103)
Net cash flows from investing activities	(5,477)	(7,430)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings of long-term debt	13,157	11,552
Repayments of long-term debt	(10,886)	(8,964)
Payments for debt issuance costs	(48)	(29)
Purchase of treasury stock	(4,568)	(3,214)
Proceeds from exercise of stock options	106	56
Distributions to noncontrolling interest	(593)	(473)
Distributions to noncontrolling interest	(116)	(114)
Borrowings for real estate investments through variable interest entities	0	170
Distributions to variable interest entities noncontrolling interest	0	(107)
Other, net	(133)	(7)
Net cash flows from financing activities	(3,081)	(1,130)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(168)	39
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	765	621
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	597	660
CASH PAID FOR INTEREST	3,065	2,920
CASH PAID FOR TAXES	$ 55	$ 27