Condensed Consolidating Financial Information of Guarantor Subsidiaries - CONDENSED CONSOLIDATING BALANCE SHEET (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 75	$ 43
Accounts receivable, net	1,525	1,545
Intercompany receivable (payable)	0	0
Inventory	135	109
Prepaid expenses and other assets	105	64
Total current assets	1,840	1,761
Investments in subsidiaries	0	0
Goodwill	5,134	5,058
Other intangible assets, net	1,019	1,084
Operating lease right-of-use assets	619
Other long-term assets	18	16
Total assets	19,047	18,133
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	995	903
Accounts payable	752	536
Accrued expenses and other liabilities	788	677
Total current liabilities	2,535	2,116
Long-term debt	10,700	10,844
Deferred taxes	1,743	1,687
Operating lease liabilities	497
Other long-term liabilities	94	83
Total liabilities	15,569	14,730
Total stockholders’ equity (deficit)	3,478	3,403
Total liabilities and stockholders’ equity (deficit)	19,047	18,133
Eliminations
ASSETS
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Intercompany receivable (payable)	0	0
Inventory	0	0
Prepaid expenses and other assets	0	0
Total current assets	0	0
Investments in subsidiaries	(4,139)	(4,452)
Goodwill	0	0
Other intangible assets, net	0	0
Operating lease right-of-use assets	0
Other long-term assets	0	0
Total assets	(4,139)	(4,452)
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	0	0
Accounts payable	0	0
Accrued expenses and other liabilities	0	0
Total current liabilities	0	0
Long-term debt	0	0
Deferred taxes	0	0
Operating lease liabilities	0
Other long-term liabilities	0	0
Total liabilities	0	0
Total stockholders’ equity (deficit)	(4,139)	(4,452)
Total liabilities and stockholders’ equity (deficit)	(4,139)	(4,452)
Parent | Reportable Legal Entities
ASSETS
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Intercompany receivable (payable)	1,923	1,534
Inventory	0	0
Prepaid expenses and other assets	0	0
Total current assets	1,923	1,534
Investments in subsidiaries	1,507	1,826
Goodwill	0	0
Other intangible assets, net	0	0
Operating lease right-of-use assets	0
Other long-term assets	10	9
Total assets	3,499	3,426
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	0	1
Accounts payable	0	0
Accrued expenses and other liabilities	0	0
Total current liabilities	0	1
Long-term debt	0	0
Deferred taxes	21	22
Operating lease liabilities	0
Other long-term liabilities	0	0
Total liabilities	21	23
Total stockholders’ equity (deficit)	3,478	3,403
Total liabilities and stockholders’ equity (deficit)	3,499	3,426
URNA | Reportable Legal Entities
ASSETS
Cash and cash equivalents	51	1
Accounts receivable, net	0	0
Intercompany receivable (payable)	(1,807)	(1,423)
Inventory	123	96
Prepaid expenses and other assets	87	60
Total current assets	(1,546)	(1,266)
Investments in subsidiaries	1,598	1,646
Goodwill	4,749	4,661
Other intangible assets, net	946	1,004
Operating lease right-of-use assets	550
Other long-term assets	8	7
Total assets	15,816	15,424
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	48	50
Accounts payable	687	481
Accrued expenses and other liabilities	729	619
Total current liabilities	1,464	1,150
Long-term debt	10,680	10,778
Deferred taxes	1,632	1,587
Operating lease liabilities	439
Other long-term liabilities	94	83
Total liabilities	14,309	13,598
Total stockholders’ equity (deficit)	1,507	1,826
Total liabilities and stockholders’ equity (deficit)	15,816	15,424
Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Cash and cash equivalents	0	0
Accounts receivable, net	0	0
Intercompany receivable (payable)	(109)	(96)
Inventory	0	0
Prepaid expenses and other assets	0	0
Total current assets	(109)	(96)
Investments in subsidiaries	1,034	980
Goodwill	0	0
Other intangible assets, net	0	0
Operating lease right-of-use assets	0
Other long-term assets	0	0
Total assets	974	924
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	0	0
Accounts payable	0	0
Accrued expenses and other liabilities	11	14
Total current liabilities	11	14
Long-term debt	8	9
Deferred taxes	0	0
Operating lease liabilities	0
Other long-term liabilities	0	0
Total liabilities	19	23
Total stockholders’ equity (deficit)	955	901
Total liabilities and stockholders’ equity (deficit)	974	924
Non-Guarantor Subsidiaries - Foreign | Reportable Legal Entities
ASSETS
Cash and cash equivalents	24	42
Accounts receivable, net	150	159
Intercompany receivable (payable)	(8)	(15)
Inventory	12	13
Prepaid expenses and other assets	18	4
Total current assets	196	203
Investments in subsidiaries	0	0
Goodwill	385	397
Other intangible assets, net	73	80
Operating lease right-of-use assets	69
Other long-term assets	0	0
Total assets	1,521	1,425
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	2	2
Accounts payable	65	55
Accrued expenses and other liabilities	46	42
Total current liabilities	113	99
Long-term debt	12	57
Deferred taxes	90	78
Operating lease liabilities	58
Other long-term liabilities	0	0
Total liabilities	273	234
Total stockholders’ equity (deficit)	1,248	1,191
Total liabilities and stockholders’ equity (deficit)	1,521	1,425
Non Guarantor Subsidiaries - SPV | Reportable Legal Entities
ASSETS
Cash and cash equivalents	0	0
Accounts receivable, net	1,375	1,386
Intercompany receivable (payable)	1	0
Inventory	0	0
Prepaid expenses and other assets	0	0
Total current assets	1,376	1,386
Investments in subsidiaries	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Operating lease right-of-use assets	0
Other long-term assets	0	0
Total assets	1,376	1,386
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Short-term debt and current maturities of long-term debt	945	850
Accounts payable	0	0
Accrued expenses and other liabilities	2	2
Total current liabilities	947	852
Long-term debt	0	0
Deferred taxes	0	0
Operating lease liabilities	0
Other long-term liabilities	0	0
Total liabilities	947	852
Total stockholders’ equity (deficit)	429	534
Total liabilities and stockholders’ equity (deficit)	1,376	1,386
Rental equipment, net
ASSETS
Property and equipment, net	9,839	9,600
Rental equipment, net | Eliminations
ASSETS
Property and equipment, net	0	0
Rental equipment, net | Parent | Reportable Legal Entities
ASSETS
Property and equipment, net	0	0
Rental equipment, net | URNA | Reportable Legal Entities
ASSETS
Property and equipment, net	9,091	8,910
Rental equipment, net | Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Property and equipment, net	0	0
Rental equipment, net | Non-Guarantor Subsidiaries - Foreign | Reportable Legal Entities
ASSETS
Property and equipment, net	748	690
Rental equipment, net | Non Guarantor Subsidiaries - SPV | Reportable Legal Entities
ASSETS
Property and equipment, net	0	0
Property and equipment, net
ASSETS
Property and equipment, net	578	614
Property and equipment, net | Eliminations
ASSETS
Property and equipment, net	0	0
Property and equipment, net | Parent | Reportable Legal Entities
ASSETS
Property and equipment, net	59	57
Property and equipment, net | URNA | Reportable Legal Entities
ASSETS
Property and equipment, net	420	462
Property and equipment, net | Guarantor Subsidiaries | Reportable Legal Entities
ASSETS
Property and equipment, net	49	40
Property and equipment, net | Non-Guarantor Subsidiaries - Foreign | Reportable Legal Entities
ASSETS
Property and equipment, net	50	55
Property and equipment, net | Non Guarantor Subsidiaries - SPV | Reportable Legal Entities
ASSETS
Property and equipment, net	$ 0	$ 0