CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities:
Net income	$ 1,386	$ 890	$ 1,174
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,983	1,988	2,038
Amortization of deferred financing costs and original issue discounts	13	14	15
Gain on sales of rental equipment	(431)	(332)	(313)
Gain on sales of non-rental equipment	(10)	(8)	(6)
Insurance proceeds from damaged equipment	(25)	(40)	(24)
Stock compensation expense, net	119	70	61
Merger related costs	3	0	1
Restructuring charge	2	17	18
Loss on repurchase/redemption of debt securities	30	183	61
Increase (decrease) in deferred taxes	268	(121)	204
Changes in operating assets and liabilities, net of acquisitions:
(Increase) decrease in accounts receivable	(300)	218	39
Decrease (increase) in inventory	9	(5)	(8)
Decrease (increase) in prepaid expenses and other assets	248	(228)	(59)
Increase (decrease) in accounts payable	307	10	(86)
Increase (decrease) in accrued expenses and other liabilities	87	2	(91)
Net cash provided by operating activities	3,689	2,658	3,024
Cash Flows From Investing Activities:
Purchases of rental equipment	(2,998)	(961)	(2,132)
Purchases of non-rental equipment and intangible assets	(200)	(197)	(218)
Proceeds from sales of rental equipment	968	858	831
Proceeds from sales of non-rental equipment	30	42	37
Insurance proceeds from damaged equipment	25	40	24
Purchases of other companies, net of cash acquired	(1,436)	(2)	(249)
Purchases of investments	0	(3)	(3)
Net cash used in investing activities	(3,611)	(223)	(1,710)
Cash Flows From Financing Activities:
Proceeds from debt	8,364	9,260	9,260
Payments of debt	(8,462)	(11,245)	(9,678)
Payments of financing costs	(8)	(23)	(28)
Proceeds from the exercise of common stock options	0	1	11
Common stock repurchased	(34)	(286)	(870)
Net cash used in financing activities	(140)	(2,293)	(1,305)
Effect of foreign exchange rates	4	8	0
Net (decrease) increase in cash and cash equivalents	(58)	150	9
Cash and cash equivalents at beginning of year	202	52	43
Cash and cash equivalents at end of year	144	202	52
Supplemental disclosure of cash flow information:
Cash paid for interest	391	483	581
Cash paid for income taxes, net	$ 202	$ 318	$ 238