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Accumulated other comprehensive income (loss)
 6 Months Ended
Feb. 28, 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 six months ended February 28, 2021 and February 29, 2020 (in millions):

Pension/ post-retirement obligationsUnrealized gain (loss) on cash flow hedgesNet investment hedgesShare of OCI of equity method investmentsCumulative translation adjustmentsTotal
Balance at November 30, 2020$(736)$(27)$(41)$(5)$(2,873)$(3,682)
Other comprehensive income (loss) before reclassification adjustments(1)10 (65)13 402 359 
Amounts reclassified from AOCI(2)1 — — 2 1 
Tax benefit (provision)1 (3)16 2 — 16 
Net change in other comprehensive income (loss)(2)9 (49)15 404 376 
Balance at February 28, 2021$(739)$(18)$(90)$10 $(2,469)$(3,306)

 Pension/ post-retirement obligationsUnrealized gain (loss) on cash flow hedgesNet investment hedgesShare 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 14 (80)19 474 444 
Amounts reclassified from AOCI(4)3 — — 5 4 
Tax benefit (provision)
(3)(4)24 1 — 17 
Net change in other comprehensive income (loss)9 13 (56)20 479 465 
Balance at February 28, 2021$(739)$(18)$(90)$10 $(2,469)$(3,306)
Pension/ post-retirement obligationsUnrealized gain (loss) on cash flow hedgesNet investment hedgesShare of AOCI of equity method investmentsCumulative translation adjustmentsTotal
Balance at November 30, 2019$(55)$(24)$14 $(5)$(3,242)$(3,313)
Other comprehensive income (loss) before reclassification adjustments4 — 27 6 (121)(84)
Amounts reclassified from AOCI(3)1 — — — (2)
Tax benefit (provision)(2)— (7)(2)3 (8)
Net change in other comprehensive income (loss)(1)1 21 4 (119)(94)
Balance at February 29, 2020$(57)$(24)$34 $(1)$(3,360)$(3,407)

 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(8)(1)(28)(5)520 479 
Amounts reclassified from AOCI(1)3 — — — 2 
Tax benefit (provision)
(1)(1)7 — 3 9 
Net change in other comprehensive income (loss)(9)1 (21)(5)524 490 
Balance at February 29, 2020$(57)$(24)$34 $(1)$(3,360)$(3,407)