Short-Term Borrowings and Long-Term Debt, Debt Issuance (Details) In Millions, unless otherwise specified							3 Months Ended							3 Months Ended											3 Months Ended		3 Months Ended			3 Months Ended					3 Months Ended				3 Months Ended
	Feb. 28, 2015 Notes Due 2015 [Member]	Feb. 28, 2015 Notes Due 2017 One [Member]		Feb. 28, 2015 Notes Due 2017 Two [Member]		Feb. 28, 2015 Notes Due 2019 [Member]	Feb. 28, 2015 Unsecured Pound Sterling Notes Due 2020 [Member] GBP (£)	Feb. 28, 2015 Notes Due 2021 [Member]		Feb. 28, 2015 Notes Due 2022 [Member]		Feb. 28, 2015 Notes Due 2024 [Member]		Feb. 28, 2015 Unsecured Pound Sterling Notes Due 2025 [Member] GBP (£)	Feb. 28, 2015 Unsecured Euro Notes Due 2026 [Member] EUR (€)	Feb. 28, 2015 Notes Due 2034 [Member]		Feb. 28, 2015 Notes Due 2042 [Member]		Feb. 28, 2015 Notes Due 2044 [Member]		Feb. 28, 2015 Pound Sterling Notes [Member] GBP (£)	Feb. 28, 2015 Unsecured Debt [Member] USD ($)	Feb. 28, 2014 Unsecured Debt [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2015 [Member]	Feb. 28, 2014 Unsecured Debt [Member] Notes Due 2015 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2016 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2017 One [Member]	Feb. 28, 2014 Unsecured Debt [Member] Notes Due 2017 One [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2017 Two [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2019 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2021 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2022 [Member]	Feb. 28, 2014 Unsecured Debt [Member] Notes Due 2022 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2024 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2034 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2042 [Member]	Feb. 28, 2014 Unsecured Debt [Member] Notes Due 2042 [Member] USD ($)	Feb. 28, 2015 Unsecured Debt [Member] Notes Due 2044 [Member] USD ($)
Debt Instrument [Line Items]
Face amount of notes issued							£ 400							£ 300	€ 750							£ 700	$ 8,000	$ 3,450		$ 750	$ 750		$ 1,000	$ 750	$ 1,250	$ 1,250		$ 1,200	$ 2,000	$ 500		$ 500	$ 1,500
Maturity date of note							Nov. 20, 2020							Nov. 20, 2025	Nov. 20, 2026										Mar. 13, 2015		May 18, 2016	Sep. 15, 2017		Nov. 17, 2017	Nov. 18, 2019	Nov. 18, 2021	Sep. 15, 2022		Nov. 18, 2024	Nov. 18, 2034	Sep. 15, 2042		Nov. 18, 2044
Interest payment frequency																									March 13 and September 13; commencing on March 13, 2013		February 18, May 18, August 18, and November 18; commencing on February 18, 2015	March 15 and September 15; commencing on March 15, 2013		May 17 and November 17; commencing on May 17, 2015	May 18 and November 18; commencing on May 18, 2015	May 18 and November 18; commencing on May 18, 2015	March 15 and September 15; commencing on March 15, 2013		May 18 and November 18; commencing on May 18, 2015	May 18 and November 18; commencing on May 18, 2015	March 15 and September 15; commencing on March 15, 2013		May 18 and November 18; commencing on May 18, 2015
Stated interest rate (in hundredths)	1.00%	1.80%	[1]	1.75%	[1]	2.70%	2.875%	3.30%	[1]	3.10%	[1]	3.80%	[1]	3.60%	2.125%	4.50%	[1]	4.40%	[1]	4.80%	[1]

[1] All notes are presented net of unamortized discount, where applicable.