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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating activities:      
Net income $ 570,828 $ 677,900 $ 1,255,805
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 325,789 321,082 317,198
Asset impairment charges 19,409    
Equity-based compensation 55,598 47,631 43,317
Deferred income taxes 47,808 51,721 61,827
Other adjustments 30,974 1,413 (1,245)
Changes in certain assets and liabilities:      
Accounts receivable (111,920) 237,805 (145,873)
Inventories (150,596) 217,866 (246,213)
Other assets (1,547) 13,735 (3,475)
Accounts payable 182,509 (86,445) 37,904
Income taxes receivable/payable 32,551 (12,095) 26,471
Accrued expenses (14,371) (74,323) 69,753
Net cash provided by operating activities 987,032 1,396,290 1,415,469
Investing activities:      
Purchases of property, plant and equipment (1,198,055) (451,945) (239,390)
Purchases of short-term investments (149,359) (396,159) (268,783)
Proceeds from maturities of short term investments 411,533 362,768 40,000
Acquisition of business, net of cash and restricted cash acquired (60,012) (97,106) (433,998)
Other investing activities 2,634 5,756 6,907
Net cash used in investing activities (993,259) (576,686) (895,264)
Financing activities:      
Issuance of current and long-term debt 2,523,356 1,573,962 445,607
Repayment of current and long-term debt (2,177,527) (1,264,152) (455,491)
Dividends paid (209,248) (200,271) (168,913)
Purchases of treasury stock (106,529) (348,608) (523,569)
Other financing activities (37,100) (27,561) (18,501)
Net cash used in financing activities (7,048) (266,630) (720,867)
Increase (decrease) in cash and equivalents, and restricted cash (13,275) 552,974 (200,662)
Cash and equivalents, and restricted cash at beginning of period 1,387,397 834,423 1,035,085
Cash and equivalents, and restricted cash at end of period 1,374,122 1,387,397 834,423
Supplemental disclosure information:      
Cash paid for interest 111,591 134,550 124,034
Cash paid for income taxes, net $ 50,417 $ 155,525 $ 288,429