Agreement of Limited Partnership (Details) (USD $) | 0 Months Ended | 9 Months Ended |
In Millions, except Per Share data, unless otherwise specified | Nov. 04, 2013 | Sep. 30, 2013 | Sep. 30, 2012 |
Agreement of limited partnership | ' | ' | ' |
Partnership distributions paid | ' | $406.80 | $422.10 |
Available cash received from operating partnership (as a percent) | ' | 99.00% | ' |
Cash distribution declared per common limited partnership unit (in dollars per unit) | $2.02 | ' | ' |
Number of average trading days' closing prices used to determine the purchase price of outstanding units of non-affiliates | ' | '20 days | ' |
Number of days before the purchase announcement is made, as a basis for determining the purchase price of outstanding units of non-affiliates | ' | '5 days | ' |
Minimum Quarterly Distributions | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Target Limit | ' | 0.605 | ' |
Target Increment | ' | 0.605 | ' |
Income and distribution allocation (as a percent) | ' | 100.00% | ' |
First Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Target Limit | ' | 0.715 | ' |
Target Increment | ' | 0.11 | ' |
Income and distribution allocation (as a percent) | ' | 100.00% | ' |
Second Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Target Limit | ' | 0.825 | ' |
Target Increment | ' | 0.11 | ' |
Income and distribution allocation (as a percent) | ' | 100.00% | ' |
Third Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Target Limit | ' | 1.045 | ' |
Target Increment | ' | 0.22 | ' |
Income and distribution allocation (as a percent) | ' | 100.00% | ' |
Final Target and Beyond | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 100.00% | ' |
Final Target and Beyond | Minimum | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Target Limit | ' | 1.045 | ' |
Common and Class B Common Units | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Cash distribution made, excluding when cumulative distribution is specified, (as a percent) | ' | 99.98% | ' |
Common Units | Minimum Quarterly Distributions | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 98.99% | ' |
Common Units | First Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 98.99% | ' |
Common Units | Second Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 85.86% | ' |
Common Units | Third Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 75.76% | ' |
Common Units | Final Target and Beyond | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 50.51% | ' |
Class B Common Units | Minimum Quarterly Distributions | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.99% | ' |
Class B Common Units | First Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.99% | ' |
Class B Common Units | Second Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.99% | ' |
Class B Common Units | Third Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.99% | ' |
Class B Common Units | Final Target and Beyond | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.99% | ' |
General Partner | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Available cash distributed from operating partnership to General Partner (as a percent) | ' | 1.00% | ' |
Cash distribution made, excluding when cumulative distribution is specified, (as a percent) | ' | 0.03% | ' |
Partnership equity interest (as a percent) | ' | 1.00% | ' |
Percentage of outstanding units owned by the General Partner and its affiliates | ' | 75.30% | ' |
Period within which highest price is paid for any unit preceding the date the purchase is announced used to determine the purchase price of outstanding units of non-affiliates | ' | '90 days | ' |
General Partner | Minimum | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Percentage of ownership of non-affiliates of the General Partner allowing majority owner to acquire outstanding units held by non-affiliated persons | ' | 25.00% | ' |
Notice period for making decision to purchase the outstanding units | ' | '30 days | ' |
General Partner | Maximum | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Notice period for making decision to purchase the outstanding units | ' | '60 days | ' |
General Partner | Minimum Quarterly Distributions | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.03% | ' |
General Partner | First Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 0.03% | ' |
General Partner | Second Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 13.16% | ' |
General Partner | Third Target | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 23.26% | ' |
General Partner | Final Target and Beyond | ' | ' | ' |
Agreement of limited partnership | ' | ' | ' |
Income and distribution allocation (as a percent) | ' | 48.51% | ' |