Restructuring Charges (Schedule Of Restructuring Charges) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Reserve [Roll Forward]
Charged to Costs and Expenses	$ 16	$ 22	$ 31	$ 50	$ 14
Closed Restructuring Programs
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			13	17	16
Charged to Costs and Expenses			1	2	14
Payments and Other			(6)	(6)	(13)
Ending Reserve Balance	8	13	8	13	17
Closed Restructuring Programs | Branch closure charges
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			13	16	13
Charged to Costs and Expenses			1	2	10
Payments and Other			(6)	(5)	(7)
Ending Reserve Balance	8	13	8	13	16
Closed Restructuring Programs | Severance and other
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			0	1	3
Charged to Costs and Expenses			0	0	4
Payments and Other			0	(1)	(6)
Ending Reserve Balance	0	0	0	0	1
NES, Neff And Project XL Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			20	0
Charged to Costs and Expenses			8	48
Payments and Other			(17)	(28)
Ending Reserve Balance	11	20	11	20	0
NES, Neff And Project XL Restructuring Program | Branch closure charges
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			8	0
Charged to Costs and Expenses			0	9
Payments and Other			(4)	(1)
Ending Reserve Balance	4	8	4	8	0
NES, Neff And Project XL Restructuring Program | Severance and other
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			12	0
Charged to Costs and Expenses			8	39
Payments and Other			(13)	(27)
Ending Reserve Balance	7	12	7	12	$ 0
BakerCorp/BlueLine Restructuring Program
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			0
Charged to Costs and Expenses			22
Payments and Other			(10)
Ending Reserve Balance	12	0	12	0
BakerCorp/BlueLine Restructuring Program | Branch closure charges
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			0
Charged to Costs and Expenses			4
Payments and Other			(1)
Ending Reserve Balance	3	0	3	0
BakerCorp/BlueLine Restructuring Program | Severance and other
Restructuring Reserve [Roll Forward]
Beginning Reserve Balance			0
Charged to Costs and Expenses			18
Payments and Other			(9)
Ending Reserve Balance	$ 9	$ 0	$ 9	$ 0