Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of changes in accounting principles

In the following table, revenue is summarized by type and by the applicable accounting standard.

	Three Months Ended March 31,
			2021						2020
	Topic 842		Topic 606		Total		Topic 842		Topic 606		Total
Revenues:
Owned equipment rentals	$	1,405	$	—	$	1,405	$	1,522	$	—	$	1,522
Re-rent revenue	32		—		32		34		—		34
Ancillary and other rental revenues:
Delivery and pick-up	—		116		116		—		119		119
Other	81		33		114		81		27		108
Total ancillary and other rental revenues	81		149		230		81		146		227
Total equipment rentals	1,518		149		1,667		1,637		146		1,783
Sales of rental equipment	—		267		267		—		208		208
Sales of new equipment	—		49		49		—		62		62
Contractor supplies sales	—		24		24		—		25		25
Service and other revenues	—		50		50		—		47		47
Total revenues	$	1,518	$	539	$	2,057	$	1,637	$	488	$	2,125

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure

The rollforward of our allowance for doubtful accounts (in total, and associated with revenues arising from both Topic 606 and Topic 842) is shown below.

	Three Months Ended March 31, 2021		Three Months Ended March 31, 2020
Beginning balance	$	108	$	103
Charged to costs and expenses (1)	—		4
Charged to revenue (2)	4		8
Deductions (3)	(8)		(8)
Ending balance	$	104	$	107

_________________

(1)    Reflects bad debt expenses recognized within selling, general and administrative expenses (associated with Topic 606 revenues).

(2)    Primarily reflects doubtful accounts associated with lease revenues that were recognized as a reduction to equipment rentals revenue (primarily associated with Topic 842 revenues).

(3)    Represents write-offs of accounts, net of immaterial recoveries.