Accumulated Other Comprehensive Income (Change in AOCI, Net of Tax) (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 2,137	$ 1,825
Other comprehensive (loss) income before reclassifications	(21)
Amounts reclassified from AOCI	(2)
Total other comprehensive (loss) income	(23)	20
Ending Balance	2,207	1,994
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(20)
Other comprehensive (loss) income before reclassifications	(27)
Amounts reclassified from AOCI	0
Total other comprehensive (loss) income	(27)
Ending Balance	(47)
Derivative Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(36)
Other comprehensive (loss) income before reclassifications	6
Amounts reclassified from AOCI	2
Total other comprehensive (loss) income	8
Ending Balance	(28)
Actuarial Gain (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	51
Other comprehensive (loss) income before reclassifications	0
Amounts reclassified from AOCI	(5)
Total other comprehensive (loss) income	(5)
Ending Balance	46
Prior Service (Cost) Credit
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(20)
Other comprehensive (loss) income before reclassifications	0
Amounts reclassified from AOCI	1
Total other comprehensive (loss) income	1
Ending Balance	(19)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(25)	(34)
Total other comprehensive (loss) income	(23)	20
Ending Balance	$ (48)	$ (14)