|
Debt - Long-Term Debt Maturities (Detail) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2014
|
|---|---|
| Debt Instrument [Line Items] | |
| 2014 | $ 19 |
| 2015 | 475 |
| 2016 | 315 |
| 2017 | 1,977 |
| 2018 | 375 |
| 2019 | 980 |
| 2020 | 384 |
| 2021 | 886 |
| 2022 | 892 |
| 2023 | 859 |
| Thereafter | 1,651 |
| Subtotal | 8,813 |
| Unamortized premiums (discounts), net | 10 |
| Total | 8,823 |
|
Wholly Owned [Member]
|
|
| Debt Instrument [Line Items] | |
| 2014 | 17 |
| 2015 | 471 |
| 2016 | 312 |
| 2017 | 1,976 |
| 2018 | 374 |
| 2019 | 978 |
| 2020 | 382 |
| 2021 | 884 |
| 2022 | 889 |
| 2023 | 858 |
| Thereafter | 1,646 |
| Subtotal | 8,787 |
| Unamortized premiums (discounts), net | 10 |
| Total | 8,797 |
|
Wholly Owned [Member] | Senior Notes [Member]
|
|
| Debt Instrument [Line Items] | |
| 2017 | 377 |
| 2018 | 262 |
| 2019 | 693 |
| 2020 | 375 |
| 2021 | 500 |
| 2022 | 881 |
| 2023 | 850 |
| Thereafter | 1,510 |
| Subtotal | 5,448 |
| Unamortized premiums (discounts), net | (5) |
| Total | 5,443 |
|
Wholly Owned [Member] | Exchangeable Notes [Member]
|
|
| Debt Instrument [Line Items] | |
| 2015 | 460 |
| Subtotal | 460 |
| Unamortized premiums (discounts), net | (8) |
| Total | 452 |
|
Wholly Owned [Member] | Credit Facilities [Member]
|
|
| Debt Instrument [Line Items] | |
| 2017 | 742 |
| Subtotal | 742 |
| Total | 742 |
|
Wholly Owned [Member] | Other Debt [Member]
|
|
| Debt Instrument [Line Items] | |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 630 |
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 373 |
| 2022 | 1 |
| 2023 | 1 |
| Thereafter | 8 |
| Subtotal | 1,018 |
| Total | 1,018 |
|
Wholly Owned [Member] | Secured Mortgage Debt [Member]
|
|
| Debt Instrument [Line Items] | |
| 2014 | 16 |
| 2015 | 10 |
| 2016 | 311 |
| 2017 | 227 |
| 2018 | 111 |
| 2019 | 285 |
| 2020 | 6 |
| 2021 | 11 |
| 2022 | 7 |
| 2023 | 7 |
| Thereafter | 128 |
| Subtotal | 1,119 |
| Unamortized premiums (discounts), net | 23 |
| Total | 1,142 |
|
Consolidated Entities [Member]
|
|
| Debt Instrument [Line Items] | |
| 2014 | 2 |
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 1 |
| Thereafter | 5 |
| Subtotal | 26 |
| Total | $ 26 |