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Accumulated other comprehensive income (loss)
 9 Months Ended
May 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated other comprehensive income (loss) Accumulated other comprehensive income (loss)
The following is a summary of net changes in accumulated other comprehensive income (“AOCI”) by component and net of tax for the three and nine months ended May 31, 2021 and May 31, 2020 (in millions):

Pension/ post-retirement obligationsUnrealized gain (loss) on cash flow hedgesNet investment hedgesUnrealized gain (loss) on available for sale securitiesShare of OCI of equity method investmentsCumulative translation adjustmentsTotal
Balance at February 28, 2021$(739)$(18)$(90)$— $10 $(2,469)$(3,306)
Other comprehensive income (loss) before reclassification adjustments— (3)(30)5 2 141 115 
Amounts reclassified from AOCI(2)14 — — — 1 13 
Tax benefit (provision)— (3)7 — (6)— (1)
Net change in other comprehensive income (loss)(1)8 (23)5 (4)142 127 
Balance at May 31, 2021$(740)$(10)$(113)$5 $6 $(2,327)$(3,180)


 Pension/ post-retirement obligationsUnrealized gain (loss) on cash flow hedgesNet investment hedgesUnrealized gain (loss) on available for sale securitiesShare of OCI of equity method investmentsCumulative translation adjustmentsTotal
Balance at August 31, 2020$(748)$(31)$(34)$— $(10)$(2,948)$(3,771)
Other comprehensive income (loss) before reclassification adjustments16 11 (110)5 21 615 558 
Amounts reclassified from AOCI(6)16 — — — 6 17 
Tax benefit (provision)
(3)(7)31 — (5)— 17 
Net change in other comprehensive income (loss)8 21 (79)5 16 621 591 
Balance at May 31, 2021$(740)$(10)$(113)$5 $6 $(2,327)$(3,180)
Pension/ post-retirement obligationsUnrealized gain (loss) on cash flow hedgesNet investment hedgesShare of AOCI of equity method investmentsCumulative translation adjustmentsTotal
Balance at February 29, 2020$(57)$(24)$34 $(1)$(3,360)$(3,407)
Other comprehensive income (loss) before reclassification adjustments(4)(8)59 (18)(482)(453)
Amounts reclassified from AOCI(3)1 — — — (1)
Tax benefit (provision)4 2 (13)3 (5)(9)
Net change in other comprehensive income (loss)(2)(5)46 (15)(487)(463)
Balance at May 31, 2020$(59)$(29)$80 $(16)$(3,847)$(3,871)


 Pension/ post-retirement obligations
Unrealized gain (loss) on cash flow hedges1
Net investment hedgesShare of AOCI of equity method investmentsCumulative translation adjustmentsTotal
Balance at August 31, 2019$(48)$(24)$55 $3 $(3,884)$(3,897)
Other comprehensive income (loss) before reclassification adjustments(12)(9)31 (23)39 26 
Amounts reclassified from AOCI(3)4 — — — 1 
Tax benefit (provision)
4 1 (6)3 (2)— 
Net change in other comprehensive income (loss)(11)(4)25 (20)37 27 
Balance at May 31, 2020$(59)$(29)$80 $(16)$(3,847)$(3,871)