New Accounting Guidance - CECL Balance Sheet Impact (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jul. 01, 2020	Jun. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net	$ 1,673	$ 1,609	$ 1,616
Deferred tax assets	145	137	135
Retained earnings	$ 258	241	$ 246
Impact of adoption of ASU 2016-13 ("CECL")
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade receivables, net		(7)
Deferred tax assets		2
Retained earnings		$ (5)