CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows From Operating Activities:
Net income	$ 585	$ 540	$ 387
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,244	1,194	1,098
Amortization of deferred financing costs and original issue discounts	10	17	21
Gain on sales of rental equipment	(227)	(229)	(176)
Gain on sales of non-rental equipment	(8)	(11)	(6)
Loss on sale of software subsidiary	0	0	1
Stock compensation expense, net	49	74	46
Merger related costs	(26)	11	9
Restructuring charge	6	(1)	12
Loss on repurchase/redemption of debt securities and amendment of ABL facility	123	80	1
Loss on retirement of subordinated convertible debentures	0	0	2
Excess tax benefits from share-based payment arrangements	(5)	0	0
Increase in deferred taxes	336	261	167
Changes in operating assets and liabilities:
Increase in accounts receivable	(11)	(101)	(20)
Decrease (increase) in inventory	8	11	(2)
(Increase) decrease in prepaid expenses and other assets	(38)	(52)	60
(Decrease) increase in accounts payable	(8)	(23)	9
(Decrease) increase in accrued expenses and other liabilities	(43)	30	(58)
Net cash provided by operating activities	1,995	1,801	1,551
Cash Flows From Investing Activities:
Purchases of rental equipment	(1,534)	(1,701)	(1,580)
Purchases of non-rental equipment	(102)	(120)	(104)
Proceeds from sales of rental equipment	538	544	490
Proceeds from sales of non-rental equipment	17	33	26
Purchases of other companies, net of cash acquired	(86)	(756)	(9)
Purchases of investments	(3)	0	0
Net cash used in investing activities	(1,170)	(2,000)	(1,177)
Cash Flows From Financing Activities:
Proceeds from debt	8,566	7,070	3,805
Payments of debt, including subordinated convertible debentures	(8,482)	(6,283)	(3,965)
Payment of contingent consideration	(52)	0	0
Payments of financing costs	(27)	(22)	(2)
Proceeds from the exercise of common stock options	1	2	6
Common stock repurchased	(789)	(613)	(115)
Cash received (paid) in connection with the 4 percent Convertible Senior Notes and related hedge, net	3	42	(24)
Excess tax benefits from share-based payment arrangements	5	0	0
Net cash (used in) provided by financing activities	(775)	196	(295)
Effect of foreign exchange rates	(29)	(14)	(10)
Net increase (decrease) in cash and cash equivalents	21	(17)	69
Cash and cash equivalents at beginning of year	158	175	106
Cash and cash equivalents at end of year	179	158	175
Supplemental disclosure of cash flow information:
Cash paid for interest, including subordinated convertible debentures	447	457	461
Cash paid for income taxes, net	$ 60	$ 100	$ 48