Long-Term Debt 2018 Private Offering of Senior Notes (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2018 |
Mar. 31, 2019 |
|
Redemption of preferred units | $ (300) | |
Common Unit Repurchase, Cash Consideration | 540 | |
Four Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty Three [Member] | Senior Notes [Member] | ||
Debt Instrument, Interest Rate, Stated Percentage | 4.85% | |
Five Point Five Zero Zero Percentage Senior Notes Due Two Thousand Twenty Six [Member] | Senior Notes [Member] | ||
Debt Instrument, Interest Rate, Stated Percentage | 5.50% | |
Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty Eight [Member] | Senior Notes [Member] | ||
Debt Instrument, Interest Rate, Stated Percentage | 5.875% | |
Series A Preferred Units [Member] | ||
Redemption of preferred units | (300) | |
Common Unit Repurchase, Cash Consideration | $ 0 |