Commitments and Contingencies - Guarantees (Details)
$ in Millions |
3 Months Ended |
|
Mar. 31, 2018
USD ($)
|
|---|
| Other Guarantees |
|
| Loss Contingencies [Line Items] |
|
| Maximum potential undiscounted payments |
$ 93
|
| Guarantee obligations maximum exposure per event |
$ 50
|
| LOOP and LOCAP LLC | Guarantee of Indebtedness of Others | Financial Guarantee |
|
| Loss Contingencies [Line Items] |
|
| Line of credit facility, expiration date |
Dec. 31, 2037
|
| Maximum potential undiscounted payments |
$ 160
|
| Centennial | Guarantee of Indebtedness of Others | Financial Guarantee |
|
| Loss Contingencies [Line Items] |
|
| Maximum potential undiscounted payments |
$ 24
|
| Centennial | Master Shelf Agreement [Member] | Financial Guarantee |
|
| Loss Contingencies [Line Items] |
|
| Line of credit facility, expiration date |
Dec. 31, 2024
|
| Crowley Ocean Partners |
|
| Loss Contingencies [Line Items] |
|
| Equity method investments, ownership percentage |
50.00%
|
| Crowley Ocean Partners | Guarantee of Indebtedness of Others | Financial Guarantee |
|
| Loss Contingencies [Line Items] |
|
| Maximum potential undiscounted payments |
$ 163
|
| Crowley Ocean Partners | Guarantee of Indebtedness of Others | Financial Guarantee | Crowley Term Loan |
|
| Loss Contingencies [Line Items] |
|
| Maximum borrowing capacity |
$ 325
|
| Crowley Blue Water Partners |
|
| Loss Contingencies [Line Items] |
|
| Equity method investments, ownership percentage |
50.00%
|
| Crowley Blue Water Partners | Guarantee of Indebtedness of Others | Financial Guarantee |
|
| Loss Contingencies [Line Items] |
|
| Maximum potential undiscounted payments |
$ 132
|
| Marathon Oil Companies | Indemnification Agreement |
|
| Loss Contingencies [Line Items] |
|
| Guarantee obligation current carrying value |
$ 2
|