Comprehensive Income - Schedule of Accumulated Other Comprehensive Loss (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2021 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 46
Other comprehensive (loss) income	(18)
Ending balance	172
Foreign Currency Translation Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(174)
Other comprehensive (loss) income	(25)
Ending balance	(199)
Minimum Pension Liability Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(11)
Other comprehensive (loss) income	0
Ending balance	(11)
Deferred Gains (Losses) On Derivative Financial Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(17)
Other comprehensive (loss) income	7
Ending balance	(10)
Accumulated Other Comprehensive Loss, net
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(202)
Ending balance	$ (220)