Long-Term Debt - Summary of Long-Term Debt Carrying Values Including Unamortized Discounts and Premiums (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Nov. 30, 2014
Debt Instrument [Line Items]
Long-term debt	$ 6,437,033	$ 6,483,617
Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	6,232,033	6,313,617
Secured debt [Member]
Debt Instrument [Line Items]
Long-term debt	205,000	170,000
3.875% Senior Note, due 2015 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.875%
Effective interest rate	2.17%
3.875% Senior Note, due 2015 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	505,851	507,944
5.5% Senior Notes, due 2016 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.50%
Effective interest rate	2.52%
5.5% Senior Notes, due 2016 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	360,702	363,229
5.125% Senior Notes, due 2018 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.125%
Effective interest rate	3.46%
5.125% Senior Notes, due 2018 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	839,383	842,359
8.5% Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	8.50%
Effective interest rate	4.00%
8.5% Senior Notes, due 2019 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	826,229	832,797
2.375% Euro Medium Term Notes, due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.375%
Effective interest rate	2.42%
2.375% Euro Medium Term Notes, due 2020 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	558,601	620,725
6.875% Senior Note, due 2021 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.875%
Effective interest rate	4.40%
6.875% Senior Note, due 2021 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	849,568	853,091
2.25% Euro Medium Term Notes, due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.25%
Effective interest rate	4.08%
2.25% Euro Medium Term Notes, due 2022 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	3,956	4,379
5.125% Senior Notes, due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.125%
Effective interest rate	4.55%
5.125% Senior Notes, due 2023 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	622,716	623,311
6.45% Senior Debentures, due 2027 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.45%
Effective interest rate	5.46%
6.45% Senior Debentures, due 2027 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	381,073	381,515
3.875% Convertible Senior Debentures due 2029 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.875%
Effective interest rate	3.50%
3.875% Convertible Senior Debentures due 2029 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	349,100	349,261
6.25% Senior Debentures, due 2036 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.25%
Effective interest rate	6.03%
6.25% Senior Debentures, due 2036 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	512,969	513,046
6.50% Senior Notes, due 2043 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	6.50%
Effective interest rate	6.09%
6.50% Senior Notes, due 2043 [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term debt	$ 421,885	$ 421,960