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Investments, Loans and LT Receivables Textuals (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Mar. 31, 2019 | Jun. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2012
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Retained Earning Equity Method |  |  |  | $ 32.0 |  |  |
Equity Method Investment Dividends |  |  |  | 1,378.0 | $ 1,226.0 | $ 605.0 |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Book value of equity method investment |  |  |  | 8,234.0 | 9,005.0 |  |
Income (Loss) From Equity Method Investments |  |  |  | $ 779.0 | 1,074.0 | 772.0 |
Australia Pacific LNG [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 37.50% |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  |  |  |  | $ 8,500.0
Line of Credit Facility, Frequency of Payments |  |  |  | bi-annual |  |  |
Balance Outstanding On Credit Facility |  |  |  | $ 6,700.0 |  |  |
Long Term Debt Refinanced Amount |  | $ 3,200.0 |  |  |  |  |
Before-Tax Loss - Equity method investments |  |  | $ 2,384.0 |  |  |  |
Book value of equity method investment |  |  |  | 7,228.0 |  |  |
Historical cost basis |  |  |  | 6,751.0 |  |  |
Difference between estimated value and book value of equity method investment |  |  |  | 477.0 |  |  |
Amortizable portion of the basis difference in PPE |  |  |  | $ 36.0 | $ 44.0 | $ 100.0 |
Australia Pacific LNG [Member] | Export-Import Bank of US [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  |  |  |  | 2,900.0
Australia Pacific LNG [Member] | Export-Import Bank of China [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  |  |  |  | 2,700.0
Early Repayment of Senior Debt | $ 1,400.0 | 1,000.0 |  |  |  |  |
Line of Credit Facility, Frequency of Payments |  |  |  | bi-annual |  |  |
Australia Pacific LNG [Member] | U S Private Placement Bond [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities | $ 1,400.0 |  |  |  |  |  |
Australia Pacific LNG [Member] | Australian and International Commercial Bank Syndicate [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  |  |  |  | $ 2,900.0
Early Repayment of Senior Debt |  | 2,200.0 |  |  |  |  |
Australia Pacific LNG [Member] | Commerical Banks [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Line of Credit Facility, Frequency of Payments |  |  |  | bi-annual |  |  |
Long Term Debt Refinanced Amount |  | 2,600.0 |  |  |  |  |
Australia Pacific LNG [Member] | U S Private Placement Bond Two [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  | $ 600.0 |  |  |  |  |
Line of Credit Facility, Frequency of Payments |  |  |  | bi-annual |  |  |
Australia Pacific LNG [Member] | Origin Energy [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 37.50% |  |  |
Australia Pacific LNG [Member] | Sinopec [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 25.00% |  |  |
QG3 |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 30.00% |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  | $ 4,000.0 |  |  |
Line of Credit Facility, Frequency of Payments |  |  |  | Semi-annual |  |  |
Book value of equity method investment |  |  |  | $ 797.0 |  |  |
Loans to related parties |  |  |  | 335.0 |  |  |
QG3 | Credit Agencies [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  | 1,300.0 |  |  |
QG3 | Commerical Banks [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  | 1,500.0 |  |  |
QG3 | ConocoPhillips [Member] |  |  |  |  |  |  |
Letters of Credit [Abstract] |  |  |  |  |  |  |
Total amount under revolving credit facilities |  |  |  | $ 1,200.0 |  |  |
QG3 | Mitsui & Co, Ltd. [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 1.50% |  |  |
QG3 | Qatar Petroleum [Member] |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 68.50% |  |  |

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